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Doctors have identified a rare pair of 'semi-identical' twins. Here's how that might happen.

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ultrasound pregnant semi identical twins

  • Doctors in Australia say they have identified a pair of rare "semi-identical"twins.
  • Their report was published Thursday in the New England Journal of Medicine.
  • Genetic testing revealed that the twins, who are now 4 years old, share all of their mother's DNA but only a portion of their father's.
  • One of the report's authors said it's likely that a single egg from the mother was fertilized by two sperm from the father before dividing in half. 

Doctors in Australia say they've discovered a rare set of twins who are neither fraternal nor identical, but something in between. 

In a report published Thursday in the New England Journal of Medicine, the researchers said they used prenatal genetic testing to identify a set of 'semi-identical' twins, USA Today reported. According to a press statement about the research, the twins are only the second set of semi-identical twins ever reported in the world, and the very first set to be identified while still in utero.

Identical twins are formed when a single egg is fertilized by a single sperm and then splits, resulting in twins who share the exact same genes. Fraternal twins occur when two separate eggs are fertilized by two separate sperm, resulting in twins who share 50% of their DNA

But scientists have postulated that there's a third type of twins, the authors of the report wrote: Semi-identical, or sesquizygotic, in which twins share between 50 and 100% of their DNA.

The twins shared a placenta, but one was male and one was female

In the report, the authors described the case of a 28-year-old woman who was pregnant with twins. Six weeks into the pregnancy, she underwent an ultrasound that showed her twins were sharing a placenta, an indication that they were identical. 

"However, an ultrasound at 14 weeks showed the twins were male and female, which is not possible for identical twins,"  Nicholas Fisk, a professor at the University of New South Wales and co-author of the report who helped care for the mother, said in the statement. 

Read more: A Chinese scientist claims to have genetically-engineered babies — here's what editing DNA means

Further genetic testing of the twins' amniotic fluid revealed that they were maternally identical but shared only part of their father's DNA, the report concluded. 

"It is likely the mother's egg was fertilized simultaneously by two of the father's sperm before dividing," Fisk said in the statement. 

Evidence suggests this is a rare phenomenon

pregnant_travel

The authors wrote that there's one previous report of semi-identical twins, published in 2007. In that case, the twins also shared 100% of maternal DNA but only part of their paternal DNA.

The authors also performed genetic tests of 968 sets of other twins presumed to be fraternal to see if any were really semi-identical. They found that none were. 

"We know this is an exceptional case of semi-identical twins," Fisk said in the statement.

The twins are now 4 years old 

Michael Gabbett, a geneticist at the Queensland University of Technology and another author of the report, explained in the statement that embryos "do not usually survive" in a situation where one egg is fertilized by two sperm, creating three sets of chromosomes.

"Three sets of chromosomes are typically incompatible with life," he said in the statement.

But in this case, the twins did survive and were delivered by cesarean section at 33 weeks of pregnancy, according to the report. 

After birth, one twin experienced a blood clot that required the amputation of one arm, the authors wrote. Three years later, doctors discovered that the same twin had a condition called gonadal dysgenesis, a condition affecting the development of the body's sex organs. Otherwise, the report said, both children were developmentally normal. 

The report also included a video with some helpful animations to illustrate how semi-identical twins occur. Watch it below:

 

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NOW WATCH: 6 TV babies you never knew are twins in real life


5 Brits predicted their heritage before taking DNA tests — the results were pretty surprising

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  • We tried a 23andMe DNA testing kit to find out more about our ancestry.
  • The test tells you all about your heritage, genetic relations, and even your neanderthal traits. 
  • The results included some big revelations and even distant royal relations.

We took a DNA test to find out our ancestry. Many of us have an idea of where we came from, but we wanted to see how much we really know about our family history. 23andMe's DNA testing kit gives you a detailed breakdown of your DNA makeup, sometimes even detailing the region of each country your family came from. 

The results were pretty surprising, watch the video to see what happened.

 

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NASA helped make a synthetic DNA structure that may shed light on what alien DNA could look like

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DNA structure helix

  • Researchers at the Foundation for Applied Molecular Evolution in Alachua, Florida, have succeeded in adding four artificial nuclear bases to natural DNA.
  • The team has dubbed the new DNA "Hachimoji", after the term "eight letters" in Japanese.
  • As well as possibly being able to build previously non-existent proteins with the new DNA, scientists may be able to use it to better understand the kinds of molecules that could exist in alien organisms.


Deoxyribonucleic acid — also known as DNA — is the molecule that contains the genetic instructions for growth, functioning, and reproduction in all known living organisms, as well as in a number of viruses.

Comprised of two chains coiled around each other in a double helix, DNA consists of four organic bases — adenine (A), cytosine (C), guanine (G) and thymine (T).

However, according to a press release from Science Alert scientists have now managed to use synthetic bases to incorporate extra letters into the DNA double helix, expanding the genome molecule by four components.

The artificial DNA can carry out the same processes as natural DNA

In addition to the A, C, G, and T bases, the new DNA structure — dubbed the Hachimoji helix after the Japanese word for "eight letters"— consists of the four natural nuclein bases as well as four synthetic ones, denoted by the letters "Z", "P", "S" and "B".

The most important quality of this new structure is that, although it's been artificially synthesised, it possesses all the essential properties of its natural counterpart: the synthetic bases of Hachimoji DNA form four complementary pairs and form hydrogen bonds with their respective partners.

Read more:Having dark eyes raises your risk of suffering with Seasonal Affective Disorder

They're designed so that they fit seamlessly into DNA's natural "spiral staircase" structure. Throughout their research, the scientists had to pay particularly close attention to these factors.

They also had to ensure that enzymes would be able to read and copy normal DNA into synthetic DNA so these proteins could successfully interact between the two types of DNA.

cell division mitosis cells

This DNA structure is stable and its reactions are predictable, meaning scientists can determine exactly how it behaves at different temperatures.

So, as well as the bases fitting nicely into DNA's double helix, enzymes are also able to read them as easily as natural bases, in order to form new molecules.

Read more: NASA found rare, extraterrestrial meteorite fragments in the ocean

There's just one thing the synthetic DNA isn't able to do: it can't survive outside the laboratory. This is because it depends on building blocks that aren't naturally occurring.

The new DNA structure could provide scientists with better insights on extraterrestrial life

As well as potentially enabling scientists to produce previously non-existent proteins, the new structure may help scientists better understand the sorts of molecules that might exist in alien organisms.

While hachimoji isn't a self-sustaining organism, it is a model of an alternative genetic structure required to propagate self-sustaining life.

On Earth, the two structures responsible for this process are RNA and DNA — but that's not to say there aren't other variations that exist elsewhere in the cosmos.

While the group certainly aren't claiming hachimojis exist elsewhere, Andrew Ellington, co-author of the study, said in a Sci-News report: "We can imagine parallel processes."

stars, baby stars, star nursery

"In 1942, Schrödinger predicted that no matter what genetic polymer life uses, its informational building blocks must all have the same shape and size. Hachimoji meets this prediction," said Steven Benner, another co-author of the study. "By carefully analyzing the roles of shape, size and structure in hachimoji DNA, this work expands our understanding of the types of molecules that might store information in extraterrestrial life on alien worlds."

Read more: Scientists have found two planets outside our solar system that could host extra-terrestrial life

"Incorporating a broader understanding of what is possible in our instrument design and mission concepts will result in a more inclusive and, therefore, more effective search for life beyond Earth," said Mary Voytek, senior scientist for Astrobiology at NASA Headquarters in a statement.

"Life detection is an increasingly important goal of NASA's planetary science missions," said Lori Glaze, acting director of NASA’s Planetary Science Division, "and this new work will help us to develop effective instruments and experiments that will expand the scope of what we look for."

If there were extraterrestrial life, it probably wouldn't consist of the same structure as the synthetic DNA, but could consist of a similar arrangement.

"However, it is wrong to say that hachimoji DNA is alien life," Dr. Benner said. "For that, the system also must be self-sustaining."

SEE ALSO: These extraordinary rocks glow under UV light – and scientists have figured out why

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NOW WATCH: Scientists completed one of the most detailed explorations inside the Great Blue Hole. Here's what they found at the bottom of the giant, mysterious sinkhole.

A DNA match found through a genealogy website has led to an arrest in a 1999 Alabama murder case

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This Saturday, March 16, 2019 booking photo provided by the Dale County Sheriff's Office, shows Coley McCraney.  Al.com reported McCraney, of Dothan, was arrested Saturday and charged with rape and capital murder in the 1999 deaths of 17-year-olds Tracie Hawlett and J.B. Beasley. Ozark police and Dale County sheriff's officials are scheduled to hold a press conference about the case on Monday, March 18. Authorities in Alabama said a DNA match found through a genealogy website led to to the arrest. (Dale County Sheriff's Office via AP)

  • A man was arrested and charged with rape and capital murder for the 1999 death of two teen girls.
  • Authorities in Alabama said a DNA match found through a genealogy website led to the arrest.
  • A different suspect was cleared after his DNA didn't match that from semen found on one of the girls.

DOTHAN, Ala. (AP) — A DNA match found through a genealogy website has led to an arrest in the killings of two teen girls nearly 20 years ago, Alabama authorities said.

Coley McCraney, 45, of Dothan, was arrested Saturday on rape and capital murder charges in the 1999 deaths of 17-year-olds Tracie Hawlett and J.B. Beasley, according to Dale County jail records.

The girls left Dothan the night of July 3, 1999, to attend a party, but never arrived. They were found the next day in the trunk of Beasley's car alongside a road in Ozark, each with a gunshot wound to the head.

A different suspect was cleared after his DNA didn't match that from semen found on Beasley.

Last year's arrest of "Golden State Killer" suspect Joseph DeAngelo in California was a factor in prompting the small Alabama police department to send their evidence to a firm that does DNA analysis, Ozark Police Chief Marlos Walker told . After decades without any big breaks, California police identified DeAngelo as a suspect by using genealogy websites to identify potential relatives of the killer based on DNA collected at a crime scene. DeAngelo now faces more than two-dozen counts of murder and kidnapping in what prosecutors describe as a killing in spree in a half-dozen California counties in the 1970s and 1980s.

Ozark police and Dale County sheriff's officials planned a news conference on Monday.

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23andMe can now tell you your risk of developing diabetes, based on your DNA. Here's what doctors want you to know.

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DNA Testing 23andMe

  • 23andMe released a new test that tells you about your risk for Type 2 diabetes, based on your DNA.
  • About 30 million people in the US have diabetes; the majority of those people have Type 2 diabetes.
  • We asked doctors who specialize in diabetes care what users should keep in mind when looking at the new report.
  • They told Business Insider that it's important to keep in mind that genetics is just one factor connected to diabetes. Others, including whether immediate family members have Type 2 diabetes, can play a bigger role in determining the potential of developing the disease. 

23andMe can now tell you if you're at an increased risk for developing a common condition in your lifetime. 

In March, the consumer genetics testing company released a new report that calculates an individual's risk of developing Type 2 diabetes, based on that person's genetic code. 

About 30 million people in the US have diabetes, of which the majority have Type 2. Another 84 million — about a third of US adults — have pre-diabetes, which can lead to Type 2, according to the Centers for Disease Control and Prevention. 

It's a condition in which the body starts to have trouble processing sugar in the blood. It can be mitigated with drugs like metformin or insulin. 

Read more: No one could explain why this college student saw the price of his life-saving diabetes medication more than double, and it reveals a disturbing problem with the US healthcare system

23andMe's report is meant to display the relative risk the test user has at a particular age of developing diabetes, given their genetic information. It's based on genetics and self-reported data from roughly 2.5 million 23andMe users who consented to take part in research. The analysis incorporates 1,000 genetic variants associated with Type 2 diabetes, though 23andMe hasn't published its model for the report in a peer-reviewed publication. The company says it intends to do so. 

Like with conditions such as cancer, Parkinson's disease, and Alzheimer's disease — three other conditions 23andMe has reports on — genetics aren't the entire picture.

Type 2 diabetes report 23andMe sample

"Here’s the bottom line: We don’t know any one genetic mutation that will cause Type 2 diabetes,"Dr. Jason Baker, an endocrinologist at Weill Cornell Medicine and NewYork-Presbyterian told Business Insider. There are a number of factors that can increase a person's risk for Type 2 diabetes.

Baker said the best predictors are being overweight and whether your immediate family members like parents or siblings have Type 2. Poor diet and not getting enough exercise are other key environmental factors that can up your risk of diabetes. Baker said he isn't in the practice of using genetics as a way to assess his patients' risk. 

"There are innumerable environmental factors, Baker said.

Read more: The best ways to lose weight and keep it off, according to science

For those who see results they aren't expecting, there are a few things Baker said he wants people to keep in mind. 

  • The first: "Don’t panic." Reports like 23andMe's are still relatively new, and of course genetics is just one factor that can contribute to Type 2 diabetes risk 
  • Secondly, "Use the information you have," Baker said. Say you're not living the healthiest lifestyle, the results might be a good reason to improve on that in some way.
  • Finally, talk to a healthcare provider about whether taking a full diabetes screening makes sense. 

Dr. Monica Gupta, an endocrinologist at CareMount Medical in New York, is optimistic about what a test like 23andMe's might be able to do as far as helping patients be more aware of the potential risk of developing diabetes and motivating them to do something about it. 

"I think that this new report is useful in the sense that patients that might not think of themselves as being at a higher risk of diabetes," Gupta said. "It might increase their awareness of having that risk based on genetic factors." 

That is, those who might not think they're at risk for developing Type 2 might strive for healthier eating or exercise habits in response to a better understanding of their genetic risk. 

Gupta said she wants people to know that determining the risk for a chronic condition like diabetes is complicated Like Baker, she doesn't use genetic screenings widely in her practice. 

Ideally she hopes this motivates people to make other changes that can decrease their risk. 

Shirley Wu, 23andMe's director of health product told Business Insider that motivating people to act is a key piece of what the company hopes the test will accomplish. The way Wu sees it, the risk score calculated based on genetics in the report can serve as a way to prompt more people to be proactive about screening for diabetes. 

"It can raise awareness in a way that’s nonjudgmental," Wu said. 

Read more:

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NOW WATCH: A molecular biologist warns chemicals in plastic can seep into food and lead to major health effects like obesity, heart disease, and diabetes

The CEO of Silicon Valley's favorite meal-replacement startup shares why he thinks the tide is shifting on genetic engineering

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Soylent

  • The CEO of Soylent, the startup behind Silicon Valley's favorite meal replacement shake, says he believes people are beginning to embrace foods made with genetic engineering.
  • Soylent began publicizing its use of GMOs nearly four years ago, when anti-GMO rhetoric was at an all-time high.
  • Now, "the pendulum is swinging in favor of the science," the CEO told Business Insider.

America may run on Dunkin' Donuts coffee, but Silicon Valley runs on something else: Soylent, a meal-in-a-bottle that's meant to contain all the nutrients you'd normally find in breakfast or lunch. 

Pick up a bottle of the stuff and you'll notice something else that sets it apart from many other American products. Each container is printed with a small stamp on the side resembling a strand of DNA.

"Produced with genetic engineering," the label reads.

Soylent uses six ingredients made with the technique, meaning they fall under the label of "GMO" or genetically-modified organism. Those ingredients include its soy protein blend, one of its sweeteners, two kinds of oils or fats, along with its corn fiber and some of its flavorings.

The company decided to go public about its use of the technology nearly four years ago, when public distrust of GMOs was at an all-time high. At the time, sales of products made with the opposite kind of label — one that read "GMO-free"— was skyrocketing. But Soylent bucked the trend. In addition to adding the genetic engineering label to its products, the company came out with a series of billboards that read "Pro-GMO" and published a lengthy blog post explaining its decision to use the ingredients.

Soylent faced a fair amount of pushback for its decision at the time. Advocacy blogs and several journalists accused the company of hiding dangerous ingredients in its products; others called the approach a marketing stunt.

But Soylent CEO Bryan Crowley thinks his company made the right choice, he told Business Insider. Here's why.

'We think the pendulum is swinging in favor of the science'

Soylent CEO Bryan CrowleyCrowley thinks the tide on GMOs is finally starting to shift. People are increasingly embracing the approach, he said during an interview on the periphery of the Future of Food-Tech Conference in San Francisco.

"We think the pendulum is swinging in favor of the science," Crowley said.

To his company, the decision to go public about their ingredients was less about marketing and more about following the consensus reached by researchers.

Read more: This Silicon Valley food-replacement favorite has a new mission — win over the mainstream

"It's not about being pro-GMO. It's about being pro-science," he said.

The scientific consensus on GMOs is that they are not harmful.

Organizations like the National Academy of Sciences, the American Association for the Advancement of Science, and the European Commission have called GMO foods safe to eat. A large 2013 study on GMOs found no "significant hazards directly connected with the use of genetically engineered crops."

Most of the food we eat today has been genetically modified in some way; everything from corn to watermelons have been selectively bred for thousands of years to give us the traits we find desirable, like large amounts of sweet, edible flesh or small seeds. Insulin, the medication that people with diabetes depend on to regulate their blood sugar, is also made with genetically modified ingredients. 

Still, Crowley admits he was once hesitant about GMOs too. Roughly a decade ago, he assumed that GMO-free products were healthier than their GMO-containing counterparts, he said.

"I did very little research" at the time, Crowley said. "I just accepted it."

But after digging into the peer-reviewed research, Crowley said he changed his mind. And he thinks others are beginning to do the same.

"People aren't just accepting something because it's on a package," he said. 

SEE ALSO: Silicon Valley startups backed by celebrities like Bill Gates are using gene-editing tool Crispr to make meat without farms — and to disrupt a $200 billion industry

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NOW WATCH: What happens to your brain and body when you do yoga regularly

A Silicon Valley startup just launched a DNA-based health test that could be a big competitor to 23andMe

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Helix DNA 6

  • On Tuesday, DNA testing startup Helix launched a new test that looks at your risk of diseases like breast cancer, colon cancer, and high cholesterol.
  • You can buy the test online for $260, but it must be approved by a physician.
  • Helix partnered with clinical diagnostics company PerkinElmer to create the test, which includes genetics counseling.
  • The test also uses a type of sequencing that some experts say all DNA-based health tests should use.

A genetics testing company you may not have heard of just made a big debut. The startup, called Helix, launched a new DNA test on Tuesday that offers some of the same health insights as those of competing tests like 23andMe, only in a format that the company claims is more comprehensive, more convenient, and more responsible.

Available online, the test looks at the impact of several dozen genetic variants on your risk of diseases such as breast cancer, colon cancer, and high cholesterol.

Called GenePrism, the new test is the result of a year-long collaboration between Helix and clinical diagnostics company PerkinElmer.

Where a 23andMe test looks only at some of the key letters in the book of DNA that makes up someone's genome, Helix's new test looks at chapters. In addition, the test provides access to experts who can help people understand their results, something 23andMe does not do.

“This is potentially very heavy information,” Elissa Levin, Helix's senior director of clinical affairs, told Business Insider. “We're not glossing over it.”

Helix's test uses a model that's similar to that of another Silicon Valley startup called Color Genomics. Like with Color, a doctor is required to sign-off on the new test, but customers can buy it themselves.

Helix also worked with a digital health and genetics startup called Genome Medical so that when people want to talk to a genetic counselor, they can do so digitally without needing to call or make an appointment. The test costs $260. Genetics counseling is included.

Giving people 'what they need to know'

DNA Testing 23andMe

In designing the new test, experts from Helix and PerkinElmer stressed to Business Insider that they had to strike a careful balance. They wanted to give people information that they can use to improve their health without overloading them with data.

"People want to know what they need to know,"Justin Kao, Helix's cofounder and senior vice president, told Business Insider. "At the same time, we don't want to throw the kitchen sink at them."

The new test looks at 59 genetic variants that are considered "medically actionable,” as defined by the American College of Medical Genetics and Genomics (ACMG).

Erynn Gordon, a genetic counselor and the vice president of clinical operations for Genome Medical, told Business Insider she viewed the new offering as the first test of its kind.

Genetic variants on the ACMG's list must have a high impact on someone's risk of disease. When it comes to breast cancer, for example, the genetic tweaks included in the new test significantly impact whether someone will develop the disease.

The variants in the test must also be variants that someone can do something about.

"These are conditions where if you get a positive result, your physician will be able to walk you through how to intervene," Kao said.

For example, if someone learns they have a genetic variant tied to a higher risk of colon cancer, the medical protocol is to have them start getting regular colonoscopies or bowel exams, thereby increasing the chances of finding the disease earlier.

Helix also stresses consumer privacy. To download your full sequencing results with any Helix health test, you must pay $499 and use two-step verification, which experts have previously told Business Insider should be the norm for genetic data.

What a 'negative' DNA test result means — and doesn't

Helix DNA 7One of the trickiest components of delivering genetic information has to do with what happens when someone gets a negative result.

While a positive result with the new test suggests that someone has a significantly higher risk of a disease like breast cancer, a negative result does not necessarily signify that they are free from risk or at a low risk.

Providing this insight to people in a way that is both responsible and helpful can be tricky. Everything from someone's family history to how often they exercise and what they eat can impact their disease risk.

For that reason, having a genetic counselor who can walk through a patient's test results is critical, Madhuri Hegde, the vice president and chief scientific officer of PerkinElmer's genomics division, told Business Insider.

"Interpretation is a big piece of this test," Hegde said.

Some DNA-based health tests, such as 23andMe's, look only at a snapshot of all the genes in your DNA, otherwise known as SNPs (pronounced "snips"). While that information can have value, it is akin to reading a few thousand letters from the page of a book containing all your DNA data, Levin said.

Helix's new test — like Color's — is more comprehensive. It essentially provides a glimpse at several chapters in that book of DNA. According to Hegde, that means there's significantly less wiggle room for interpreting the results incorrectly.

Theodora Ross, the director of the cancer-genetics program at the University of Texas Southwestern, believes this more comprehensive approach, also known as exome sequencing, is the only way genetic testing should be done today.

"Doing this kind of sequencing is a no-brainer. Using SNPs [the method 23andMe uses] is just silly,"Ross told Business Insider.

Still, Ross was not convinced that the new test is a one-stop solution to delivering genetic insights to people. She said she was surprised that PerkinElmer and Helix had not yet published a peer-reviewed paper explaining how they interpret people's genetic data.

"It's a black box," Ross said. "That makes me think, ‘buyer beware.'"

Ross also stressed that she'd like to see patients connect directly with their personal physician, rather than with someone arranged online, to ensure that the genetic information from the test is entered permanently into their healthcare record.

But that doesn’t necessarily rule out the utility of Helix's new test, she said.

"There's some really good new genetic science out there," Ross said. "I'd just like to see more from them."

SEE ALSO: After you spit into a tube for a DNA test like 23andMe, experts say you shouldn't assume your data will stay private forever

DON'T MISS: Genetic testing is the future of healthcare, but many experts say companies like 23andMe are doing more harm than good

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NOW WATCH: Physicists have discovered that rotating black holes might serve as portals for hyperspace travel

The world's first gene-edited reptile is a finger-sized albino lizard

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albino lizard

  • For the first time ever, scientists have used Crispr technology to gene-edit a reptile.
  • A new study recounts how a team successfully tweaked the genes of 146 brown anole lizard embryos.
  • First reported by Science magazine, the scientists created four albino lizards — each no bigger than a finger when they hatched. The lack of pigmentation was a sure sign that their gene-editing trial had worked.  
  • Researchers have used Crispr to alter chicken, pig, cow, and even fish genes. But this is the first time the technology has been brought to bear on reptiles.
  • Gene-edited reptiles could be used to help test therapeutic drugs or control invasive species in the Everglades.

Over the past several years, researchers have successfully modified chicken, pig, cow, mouse, and even fish genes using Crispr technology, a tool first patented in 2012 that allows scientists to tweak individual genes and change DNA sequences inside cells.

Crispr can be used to create pest-resistant genetically-modified crops, correct genetic defects like blindness, treat cancer, and breed malaria-free mosquitoes.

But reptiles like snakes, lizards, and crocodiles were considered off the gene-editing table because of the creatures' unusual reproductive systems. 

Not anymore.

A group of scientists at the University of Georgia have successfully altered the genes of four brown anole lizards, which were eventually born lacking the typical brown pigment from which the species derives its name.

The team first reported their results online March 31, 2019 in a bioRXiv paper that hasn't yet been reviewed by other scientists. 

"The whole field of developmental genetics has left reptiles in the dust," Douglas Menke, study co-author and associate professor of genetics at the University of Georgia, told Science magazine, the first publication to report on the team's successful gene-editing work.

Read More:Bill Gates says it would be a 'tragedy' to pass up a controversial, revolutionary gene-editing technology

These genetically modified lizards, however, are changing that reality. 

"Needless to say we were both jazzed about the addition to the lab,"Ashley Rasys, a graduate student in the University of Georgia's cellular biology department and lead author of the study, told Business Insider. 

Lack of pigment in the lizard was a sure sign the gene-editing worked

Rasys and Menke chose to attempt gene-edits on the brown anole lizard, or Anolis sagrei, because of its small size, long breeding season, and how frequently females lay eggs.

The scientists injected the females' unfertilized eggs with the Crispr tech while they were still in the ovaries, and then allowing mating and breeding to happen naturally. 

The team targeted a gene responsible for the enzyme tyrosinase, which affects the lizard's color. If the gene is de-activated, the hatchlings should come out lacking pigment. So an albino baby lizard was a sure sign that the scientists' gene-tweak had worked. 

They edited 146 eggs from 21 different lizards, and four of the hatchlings them emerged as albinos. Unfortunately Rasys and Menke were in a meeting during the historic hatching.

"Another member of our research group witnessed the hatchling emerge from its egg," Menke told Business Insider. "I received a text message with a photo of our first albino lizard while I was in a meeting. Needless to say, I excused myself from the meeting as soon as I could."

Rasys, too, said she witnessed her first glance of the team's "new arrival" through that same text.

albino lizard

Menke said the gene-editing produced both male and female lizards, some two inches in length (though more than half of that length comes from the creatures' long, skinny tails). 

While the lizards don't have names, each lizard receives a unique ID to help the scientists track individual animals.

The achievement could help test drugs and control invasive reptiles

For Menke and Rasys, this achievement represents more than just bucking one of Crispr's longstanding limitations.

"There is a whole universe of unstudied biology in these animals," Menke said. "Gene editing is the most direct way to explore gene function in these species." There are over 10,000 described species of reptile, and the genome of each species contains around 25,000 genes, he added.

Studying reptile genes can improve scientists' understanding of human biology, too. For example, people who are born without pigment, much like these anole lizards, also tend to have poor eyesight due to defects in their eyes.

The major cause of these vision problems is that the fovea (a pit-like depression in the human eye which enables sharp, clear eyesight) is absent or under-developed, Menke said. Most animals used for genetic studies like mice lack a fovea, and therefore can't be used to understand foveal defects.

But the lizards Menke and Rasys' team are working with hunt insects and need high acuity vision; their eyes have fovea. "Finally we have an animal that we can use to understand human foveal defects," Menke said.

Having the ability to tweak lizard genes opens the door to identifying therapeutic targets and testing drugs in developing lizards, Rasys said.

albino lizard

Menke also added that gene editing could be used in animal conservation efforts. Invasive reptiles — particularly those in Florida, like the Burmese pythons in the Everglades — can harm native wildlife. 

"There are certain gene editing approaches that might be used to help control some of these invasive species of reptile," Menke said.

SEE ALSO: A Chinese scientist claims to have genetically engineered babies. Here's what editing DNA means.

WATCH NEXT: Watch science writer Carl Zimmer explain CRISPR in 90 seconds

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Meet the woman who helped discover DNA — and whose work was nearly forgotten by history

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Rosalind Franklin

  • Rosalind Franklin made a groundbreaking discovery into DNA, but died before she could receive a Nobel Prize. 
  • On April 16, the anniversary of her death, here's a look back into Franklin's fascinating yet overlooked life and achievements. 
  • Visit BusinessInsider.com for more stories.

If ever there was a case of someone who didn't get the recognition she deserved, it's Rosalind Franklin.

The British-born chemist, whose death anniversary is today, did pioneering work that led to the discovery of the structure of deoxyribonucleic acid, or DNA, the set of genetic instructions that tell cells how to carry out all of their normal activities.

James Watson, Francis Crick, and Maurice Wilkins won a Nobel Prize in 1962 for discovering DNA's structure. However, Franklin died of cancer in 1958 before the prize was awarded.

Read more:12 incredible women you've never heard of who changed science forever

Many say Franklin was wronged by her male colleagues, while others say this view may itself be an oversimplification.

Whatever the truth, it's clear that Franklin's accomplishments have been largely overlooked.

Franklin's early life

The Rosalind Franklin Papers tell the fascinating story of Franklin's life, work, and legacy.

Rosalind Elsie Franklin was born on July 25, 1920, in London, to Ellis Franklin, a partner at Keyser's Bank, and his wife Muriel Franklin.

She was lucky enough to attend St. Paul's Girls School, one of the few at the time that emphasized careers over homemaking. There, she showed a natural aptitude for science and languages.

In 1938, she enrolled in Newnham College, one of two women's colleges at Cambridge University, where she studied physical chemistry. Her subsequent studies would be shaped by World War II.

Franklin graduated in 1941, and spent a year working in the laboratory of R. G. W. Norrish, a pioneer in the chemistry of light. The following year, she embarked on a PhD related to the war effort. She worked for the British Coal Utilisation Research Association, a nonprofit group promoting coal research, studying the microscopic structures of different coals and carbons.

After finishing her PhD, Franklin landed a job in the lab of French engineer Jacques Mering at the Laboratoire Central des Services Chimique de l'Etat in Paris. There, she learned how to image carbon-based compounds using a technique called X-ray crystallography– crystallizing proteins and other compounds and imaging them using X-rays — which she'd become an expert in.

In fact, her X-ray images would play a crucial role in the discovery of DNA's structure.

'Photograph 51' and the structure of DNA

rosalind franklinFranklin went back to England in 1950 to pursue a fellowship in the lab of a biophysicist named John Randall at King's College London.

Though Randall originally wanted her to build up the lab's work on crystallizing and imaging proteins, Maurice Wilkins, the assistant lab chief, suggested that she work on DNA.

Wilkins was planning to work together with Franklin, but a misunderstanding turned their relationship sour.

Instead, Franklin worked with graduate student Raymond Gosling to take X-ray images of DNA. They discovered two forms of DNA, a "wet" form and a "dry" form. The wet form appeared to have a helix-shaped structure, like a spiral staircase, but the dry form didn't, so Franklin spent a year trying to discover which structure was correct.

Meanwhile, the British biologist Francis Crick and American biologist James Watson were developing a theoretical model of DNA at the University of Camridge's Cavendish Laboratory. In January 1953 Wilkins showed them one of Franklin's X-ray images of DNA, now known simply as "Photograph 51," as well as a summary of unpublished research which she had submitted to the Medical Research Council.

Watson and Crick published the structure of DNA that April in the journal Nature. They never told Franklin they had seen her photograph, but Crick later admitted she was only a few steps away from figuring it out.

Franklin and Gosling published X-ray findings in the same issue of the same journal, but the credit went to Watson, Crick, and Wilkins.

An unfair portrayal

Franklin ended up transferring to work in the lab of J. D. Bernal at Birkbeck College, where she studied the structure of plant viruses, especially tobacco mosaic virus (TMV) and polio virus. She made detailed X-ray images of the viruses, and her work was recognized by the Royal Institution in 1956.

That same year, she was diagnosed with ovarian cancer. She underwent a number of surgeries and other treatments, but the treatments only worked temporarily, and she died on April 16, 1958, at the age of 37.

Watson published his memoir, "The Double Helix," in 1968, depicting Franklin (whom he referred to derogatorily as "Rosy,"a nickname she hated) as bad-tempered and incompetent. In fact, many reviewers (including Crick and Wilkins) thought the portrayal was unfair.

"[If] ever there was a woman who was mistreated, it was Rosalind Franklin, and she didn't get the notice that she should have gotten for her work on DNA,"said Ava Helen Pauling, wife of famous scientist Linus Pauling, said in an interview with Lee Herzenberg in 1977.

In 1975, Anne Sayre published a biography of Franklin that attempted to set the record straight and give Franklin her due. Another biography of Franklin by Brenda Maddox told a more nuanced story.

While Franklin's life may have been tragically cut short, her contributions to our understanding of DNA and viruses live on.

This article was originally written by Tanya Lewis.

SEE ALSO: Women occupied only 24% of STEM jobs in 2017 — but there's a way we can fix that

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NOW WATCH: Watch science writer Carl Zimmer explain CRISPR in 90 seconds

We'll be eating the first Crispr'd foods within 5 years, according to a geneticist who helped invent the blockbuster gene-editing tool

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While ethicists debate the applications of blockbuster gene-editing tool Crispr in human healthcare, an inventor of the tool believes it has a more immediate application: improving our food.

"I think in the next five years the most profound thing we'll see in terms of Crispr's effects on people's everyday lives will be in the agricultural sector,"Jennifer Doudna, the University of California Berkeley geneticist who unearthed Crispr in early experiments with bacteria in 2012, told Business Insider.

Crispr has dozens of potential uses, from treating diseases like sickle cell to certain inherited forms of blindness. The tool recently made headlines when a scientist in China reportedly used it to edit the DNA of a pair of twin baby girls.

Then there are Crispr's practical applications — the kinds of things we might expect to see in places like grocery stores and farmers' fields within a decade, according to Doudna.

Relatively cheap and easy to use, Crispr is showing up in everything from veggies to lab-grown meat

Crispr's appeal in food is straightforward: it's cheaper and easier than traditional breeding methods, including those that are used to make genetically modified crops (also known as GMOs) currently. It's also much more precise. Where traditional breeding methods hack away at a crop's genome with a dull blade, tools like Crispr slice and reshape with scalpel-like precision. 

Want a mushroom that doesn't brown? A corn crop that yields more food per acre? Both already exist, though they haven't yet made it to consumers' plates. What about a strawberry with a longer shelf life or tomatoes that do a better job of staying on the vine?

"I think all of those things are coming relatively quickly," Doudna said.

Read more:The 10 people transforming healthcare

Work on Crispr'd produce has been ongoing for about half a decade, but it's only recently that US regulators have created a viable path for Crispr'd products to come to market. 

Back in 2016, researchers at Penn State used Crispr to make mushrooms that don't brown. Last spring, gene-editing startup Pairwise scored $125 million from agricultural giant Monsanto to work on Crispr'd produce with the goal of getting it in grocery stores within the decade. A month later, Stefan Jansson, the chief of the plant physiology department at Sweden's Umea University, grew and ate the world's first Crispr'd kale. 

More recently, several Silicon Valley startups have been experimenting with using Crispr to make lab-grown meat.

Read more:Startups backed by celebrities like Bill Gates are using Crispr to make meat without farms

Memphis Meats, a startup with backing from notable figures like Bill Gates and Richard Branson that has made real chicken strips and meatball prototypes from animal cells (and without killing any animals), is using the tool. So is New Age Meats, another San Francisco-based startup that aims to create real meat without slaughter.

US regulators will likely allow Crispr'd crops to come to market

Last spring, the US Department of Agriculture issued a new ruling on crops that exempts many Crispr-modified crops from the oversight that accompanies traditional GMOs. So long as the edited DNA in those crops could also have been created using traditional breeding techniques, the Crispr'd goods are not subject to those additional regulatory steps, according to the agency. 

"With this approach, USDA seeks to allow innovation when there is no risk present," secretary of agriculture Sonny Perdue said in a statement. Genome editing tools like Crispr, he added, "will help farmers do what we aspire to do at USDA: do right and feed everyone."

Read more:A controversial technology could save us from starvation — if we let it

Although several researchers and scientists have cheered the decision, many anti-GMO activists have not been pleased. 

Despite the pushback, Doudna believes that Crispr'd food could help dispel some of the fear around GMOs and increase awareness about the role of science in agriculture.

"I hope this brings that discussion into a realm where we can talk about it in a logical way," she said. "Isn't it better to have technology that allows for precise manipulation of a plant genome, rather than relying on random changes?"

DON'T MISS: A controversial technology could save us from starvation — if we let it

SEE ALSO: Silicon Valley startups backed by celebrities like Bill Gates are using gene-editing tool Crispr to make meat without farms — and to disrupt a $200 billion industry

Join the conversation about this story »

NOW WATCH: 5 animals that have the most extreme sex in the animal kingdom

Many of the best at-home DNA kits are on sale right now to celebrate National DNA Day — here's a quick break down of each one

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Insider Picks writes about products and services to help you navigate when shopping online. Insider Inc. receives a commission from our affiliate partners when you buy through our links, but our reporting and recommendations are always independent and objective.

DNA Testing 23andMe

  • April 25 is National DNA Day, a holiday created to celebrate the completion of the Human Genome Project in 2003.
  • To celebrate, most of the major DNA testing companies have put kits on sale, including 23andMe, AncestryDNA, Living DNA, and more.
  • We found seven kits on sale and broke down the key differences between each, below.

Today, April 25, is National DNA Day. As another "holiday" that you may not have heard about until now, you're probably wondering what it means and how to celebrate it.

National DNA celebrates the completion of the Human Genome Project, a 13-year, publicly funded research project on discovering the specifics of human DNA sequences.

Since the inception of the holiday in 2003, the goal has been to give back to the public with knowledge on genetics — and there's no better way to do that than with at-home DNA kits.

If you've ever been interested in learning more about your ancestry or family history, right now is the best time to do so as many of the best at-home DNA kits are discounted on Amazon today.

While most tests unveil similar data, there are key differences between each one. Check them out below.

AncestryDNA

$69 (Originally $99) [You save $30]

With over 1 billion family connections, AncestryDNA is the best-selling DNA test you can buy. The service helps you discover the people and places that made you who you are by tapping into 350 regions across the world — two times more than the next leading competitor.



23andMe

$139 (Originally $199) [You save $60]

The 23andMe kit is one of the most in-depth at-home DNA tests you can take. Not only will it break down your ancestry, but it will also discover your genetic health risks for diseases like Parkinson's or Alzheimer's, carrier traits for diseases like Cystic Fibrosis and Sickle Cell, report on your wellness with details like sleep patterns and lactose intolerance, and other genetic traits. If you're only interested in learning your ancestry you can buy the genetics kit for $69 — a $30 savings.



National Geographic Geno 2.0

$31.99 (Originally $99.99) [You save $68]

The National Geographic Geno 2.0 Next Generation provides a breakdown of your regional ancestry by percentage, going back as 500,000 years. Once your DNA sample is submitted and processed, you can access the data via the Geno 2.0 smartphone app, where an easy-to-understand video walks you through your ancestry. You'll learn about which historical relatives you could be related to.

 



See the rest of the story at Business Insider

Homeland Security will begin administering DNA tests at the border to check for fraud, child trafficking

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  • US Immigration and Customs Enforcement will begin voluntary DNA testing in cases where officials suspect that adults are fraudulently claiming to be parents of children as they cross the US-Mexico border.
  • The decision comes as Homeland Security officials are increasingly concerned about instances of child trafficking as a growing number of Central American families cross the border, straining resources to the breaking point.
  • Border authorities also recently started to increase the biometric data they take from children 13 and younger, including fingerprints, despite privacy concerns and government policy that restricts what can be collected.
  • Officials with the Department of Homeland Security wouldn't say where the DNA pilot program would begin, but they did say it would start as early as next week and would be very limited.
  • Visit Business Insider's homepage for more stories.

WASHINGTON (AP) — US Immigration and Customs Enforcement will begin voluntary DNA testing in cases where officials suspect that adults are fraudulently claiming to be parents of children as they cross the US-Mexico border.

The decision comes as Homeland Security officials are increasingly concerned about instances of child trafficking as a growing number of Central American families cross the border, straining resources to the breaking point. Border authorities also recently started to increase the biometric data they take from children 13 and younger, including fingerprints, despite privacy concerns and government policy that restricts what can be collected.

Officials with the Department of Homeland Security wouldn't say where the DNA pilot program would begin, but they did say it would start as early as next week and would be very limited.

The DNA testing will happen once officials with US Customs and Border Protection, which manages border enforcement, refer possible instances of fraud to ICE, which usually manages interior enforcement. But teams from ICE's Homeland Security Investigations were recently deployed to the southern border to help investigate human smuggling efforts.

The rapid DNA test will take about two hours and will be obtained using a cheek swab from both the adult and child. The parent is to swab the child, officials said.

The testing will be destroyed and won't be used as evidence in any criminal case, they said.

Generally, government officials determine a family unit to be a parent with a child. Fraud would occur if a person is claiming to be a parent when he or she is another type of relative, or if there was no relationship at all. ICE officials said they have identified 101 possible instances of fraudulent families since April 18 and determined one-third were fraudulent.

Since the beginning of the budget year, they say they have uncovered more than 1,000 cases and referred 45 cases for prosecution. The fraud could also include the use of false birth certificates or documents, and adults accused of fraud aren't necessarily prosecuted for it; some are prosecuted for illegal entry or other crimes.

Homeland Security officials have also warned of "child recycling," cases where they say children allowed into the US were smuggled back into Central America to be paired up again with other adults in fake families — something they say is impossible to catch without fingerprints or other biometric data.

But the department hasn't identified anyone arrested in such a scheme or released data on how many such schemes have been uncovered. Advocates say they're worried that in the name of stopping fraud, agents might take personal information from children that could be used against them later.

DHS officials say the program will be done with existing funds. Earlier Wednesday, the White House said it would need an additional $4.5 billion in humanitarian aid for the border. The 2019 fiscal year budget already contained $415 million for humanitarian assistance at the border, including $28 million in medical care, senior administration officials said Wednesday.

But the White House now wants an extra $3.3 billion to increase shelter capacity for unaccompanied migrant children and for the feeding and care of families, plus transportation and processing centers.

___

Associated Press writer Nomaan Merchant contributed to this report from McAllen, Texas.

SEE ALSO: A 16-year-old migrant boy has died in US custody

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NOW WATCH: The Karlmann King is a $2 million enormous ultra-luxury SUV built upon a Ford F-550

As Silicon Valley tech giants like Facebook and Juul push into healthcare, they see revolution. Outside experts see red flags.

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  • As Silicon Valley tech companies increasingly push into the realm of healthcare, outside experts and clinicians are raising red flags.
  • In the cases of suicide prevention, genetic testing, and e-cigarettes, lives may hang in the balance.
  • In the tech universe, much of the motivation for a new technology is wrapped up in its potential to disrupt existing markets.
  • In healthcare, clinicians have to think about what could happen to someone after they use the tool they are given. The risk of harm is high.
  • Visit Business Insider's homepage for more stories.

When the Harvard psychiatrist and tech consultant John Torous learned that Facebook monitors its users' posts for warning signs that they might be at risk of suicide, he was shocked.

Having grown accustomed to working with tech giants like Microsoft on scientific research, he wondered why he'd never heard about Facebook's program. He was even more surprised to find out that as part of its efforts, Facebook was sending emergency responders to people's homes.

Facebook's monitoring tool has been running since 2017 and was involved in sending emergency responders to people more than 3,500 times as of last fall, the company said. But the reason Torous hadn't heard of it is because the company hasn't shared information about the tool with researchers such as him, or with the broader medical and scientific community.

Without that information, Torous said, big questions about Facebook's suicide-monitoring tool are impossible to answer. Torous is worried the tool might home in on the wrong users, discourage frank discussions about mental health on the platform, or escalate, or even create, a mental-health crisis where there wasn't one. In sum, Torous said Facebook's use of the tool could be harming more people than it's helping.

"We as the public are partaking in this grand experiment, but we don't know if it's useful or not," Torous told Business Insider.

Facebook says the tool isn't a health product or research initiative but more akin to calling for help if you see someone in trouble in a public space.

It is the latest example of a trend in Silicon Valley, where the barriers that separate tech from healthcare are crumbling. A growing array of products and services — think Apple Watch, Amazon's Alexa, and even the latest meditation app — straddle the gap between health innovation and tech disruption. Clinicians see red flags. Tech leaders see revolution.

Never miss out on healthcare news. Subscribe to Dispensed, our weekly newsletter on pharma, biotech, and healthcare.

Silicon Valley's critics like to point to Theranos as a dramatic example of what can go wrong as a result of the breakdown. Bolstered by big investors, the secretive blood-testing startup reached a valuation of $9 billion, despite publishing little research showing its tech worked. When it was gradually revealed that the advanced technology required for its devices did not exist, the company and its founder, Elizabeth Holmes, toppled.

Clinicians and researchers interviewed for this article said that tech products and services could often be overhyped or even harmful, even if they couldn't reach Theranos-level deception. They said the health claims that companies make frequently run ahead of the evidence — a problem when people's health is on the line.

"There's almost this implicit assumption that they play by a different set of rules," Torous said.

Take Juul, which is now the top seller of e-cigarettes in the US. When the San Francisco company launched its high-nicotine vaping devices, it styled them as compatible with a healthy lifestyle. When Juul was then tied to a teen-vapingepidemic, experts called attention to Juul's lack of published health research and its youthful launch campaign. Had Juul been required to rigorously study its e-cigarettes before flooding the market with them, the company might have avoided putting youth at risk, experts say.

Founded in 2006, 23andMe is one of the oldest Silicon Valley healthcare startups. The company has long portrayed its genetic tests as helping people take better control of their health by providing a snapshot of their risk of diseases like late-onset Alzheimer's and cancer. In 2013, however, regulators forced the company to stop selling the tests on the grounds that they hadn't proven their results to be accurate with published research.

Now, with limited regulatory sign-off and dozens of published studies, 23andMe is selling its health tests once again. Yet clinicians still call the reportssubpar. These experts say the reports can mislead. They point out that although regulators have approved of them as medical tools, the bar for that threshold was significantly lowered recently. 23andMe, on the other hand, says its reports are empowering and touts regulators' blessing.

'The walls are breaking down fast'

DNA Testing 23andMe

In the view of Laura Hercher, the director of research in human genetics at Sarah Lawrence College, tech companies and clinicians approach health problems from fundamentally different perspectives. Where tech tends to prioritize disruption and convenience, healthcare puts an emphasis on safety.

But the invisible barriers that once separated tech from health are deteriorating, she said. In the meantime, patients and consumers may suffer the consequences, other experts say.

"The walls are breaking down fast," Hercher told Business Insider. "There's going to be a lot to figure out as we go along."

At Facebook, a health problem came to the company. Staff had known there was an issue since 2009, when a cluster of suicides occurred at two high schools near the company's headquarters in Palo Alto. Then, things became personal. After the company rolled out a livestreaming tool called "Facebook Live" several people used it to livestream their suicides. First it was a 14-year-old girl and then a 33-year-old man, both in the US. Later, in the fall, a young man in Turkey broadcast himself taking his own life.

Facebook tasked its safety-and-security team with doing something about it.

The team spoke with experts at several suicide-prevention nonprofits, including Daniel Reidenberg, the founder of Save.org. Reidenberg told Business Insider that he helped Facebook create a solution by sharing his experiences, bringing in people who'd struggled personally with suicide, and having them share what helped them.

The result was Facebook's suicide-monitoring algorithm, or, as the company calls it, its suicide-prevention algorithm. Using pattern-recognition technology, the tool identifies posts and livestreams that appear to express intents of suicide. It scans the text in a post, along with the comments on it, such as "Are you OK?" When a post is ranked as potentially suicidal, it is sent first to a content moderator and then to a trained staff member tasked with notifying emergency responders.

Clinicians and companies disagree on the definition of health research

facebook

Antigone Davis, Facebook's global head of safety, told Business Insider that she likens the tool to crisis response and does not consider it health research. She said Facebook doesn't store data on individuals related to what the algorithm detects about their suicide risk.

"The AI is working on the content, not on the individual," Davis said.

It is unclear how well the tool works. Because of privacy issues, emergency responders can't tell Facebook what happened at the scene of a potential suicide, Davis said. In other words, emergency responders can't tell Facebook if they reached the scene too late to stop a death, showed up to the wrong place, or arrived only to learn there was no real problem.

Torous, a psychiatrist who's familiar with the thorny issues in predicting suicide, is skeptical. He points to a review of 17 studies in which researchers analyzed 64 different suicide-prediction models and concluded that the models had almost no ability to successfully predict a suicide attempt.

"It's one thing for an academic or a company to say this will or won't work. But you're not seeing any on-the-ground peer-reviewed evidence," Torous said. "It's concerning. It kind of has that Theranos feel."

Reidenberg told Business Insider that he believes Facebook is doing good work in suicide, but because its efforts are in uncharted waters, he thinks everyday issues will arise with the tool. He disagrees with Torous' view that the efforts are health research. "There isn't any company that's more forward-thinking in this area," Reidenberg said.

Something that's easier or prettier may not be good enough in healthcare

juul e-cig pax labs

Juul has long presented itself as a health-tech company and is eager to show that its devices can improve the health of adult smokers. When it launched its e-cigarettes in 2015 with a party in New York City, Juul's then-parent company, the tech startup Pax Labs, called the Juul "smoking evolved."

Before the launch party, though — and for several years afterwards — neither Pax nor Juul published any real health research. Then, reports of a vaping epidemic among teens began to surface.

Meanwhile, clinicians and academics looked at Juul's devices and saw a big problem: They had a handful of qualities that made them uniquely appealing to young people.

Even compared with other e-cigarettes, Juul devices contain very high levels of addictive nicotine, which may help adult smokers but which also appear to interfere with learning and memory in the still-developing teen brain, according to Suchitra Krishnan-Sarin, a professor of psychiatry at Yale's center for nicotine and tobacco research. Juuls are also easier to hide and to use discretely, another quality that could be helpful for adults but especially harmful for teens, Krishan-Sarin said.

Other experts point to Juul's 2015 ads— which depicted young models on flashy backgrounds — and Juul's sweet flavors, such as crème brûlée and cool cucumber. They say both appealed uniquely to youth. Had the startup studied its devices before selling them, those problems may have been foreseeable, they say.

"The problem is Juul products just came onto the market without any regulation and without any controlled studies," Krishnan-Sarin told Business Insider.

In a statement emailed to Business Insider, a Juul spokesperson said the company "exists to help adult smokers switch from combustible cigarettes, which remain the leading cause of preventable death around the world," and added that Juul is now publishing research. The representative also said the company is committed to preventing youth access to its products and supports raising the national tobacco and vapor purchasing age to 21.

"We invite those who criticize us for launching in 2015 to talk to former smokers about the impact switching to Juul has had on their lives," the spokesperson said.

Who are 23andMe's genetic tests for?

Then there's 23andMe, which rolled out the health and disease component of its genetic tests in 2013, before publishing research that showed the tests to be accurate, according to regulators at the US Food and Drug Administration. Today, the agency has approved of 23andMe's products as medical tools, thanks in part to a less-stringent process introduced last year. In addition, the company has now published dozens of basic research papers. But clinicians say those things don't mean the tests are safe.

"It's regulatory whack-a-mole," Hercher said. "The FDA has started cracking down on anything that interferes in a specific field of vision, and 23andMe has gotten clever about avoiding that."

Jeffrey Pollard, 23andMe's director of medical affairs, told Business Insider that its tests are designed for healthy people who want to learn more about their genes and are not intended to meet the level of care designed for the clinic. He said the company is clear in how it communicates that to customers. Pollard also said 23andMe regularly engages with experts outside the company to ensure their products are up-to-date.

"I think it's obvious that genetics and the tests we provide are quite impactful, and in that way, we deserve to be paid attention to and embraced," he said.

But to Hercher, 23andMe's reports are concerning for several reasons. One is that the tests don't include counseling, a service that she and other experts see as critical to ensuring that people understand their results and their real risk of disease. Another is that they are not comprehensive because they only look at a select few genes involved in one's risk of disease.

"Producing something that kind of works and is faster, cheaper, or easier isn't always an adequate answer if it turns out to put some people at risk," she said.

'Move fast and break things' versus 'first, do no harm'

Mark Zuckerberg

A decade ago, Facebook cofounder and CEO Mark Zuckerberg told Business Insider founder Henry Blodget that his prime directive to his team was to "move fast and break things."

"Unless you are breaking stuff," he said, "you are not moving fast enough."

It has become the unofficial motto of Silicon Valley.

But experts including Torous say that mantra is at odds with medicine's Hippocratic oath, in which doctors swear to "first, do no harm."

In the cases of suicide prevention, genetic testing, and e-cigarettes, lives may hang in the balance. In the tech universe, much of the motivation for a new technology is wrapped up in its potential to disrupt existing markets. But in healthcare, clinicians have to think about what could happen to someone after they use the tool they are given.

Healthcare is an industry that requires particular caution because patients are often in a vulnerable position. They might be sick or facing an elevated risk of disease or death. The chance of causing harm is high.

Hercher and Torous said that academics and clinicians play by rules different from Silicon Valley's.

"It's not that we're dealing with different fact sets — we have different obligations," Hercher said. "We live in different universes."

Academics are worried about vulnerable populations

DNA Testing 23andMe

Torous is worried that Facebook's suicide-monitoring tool doesn't work very well, especially based on what he's seen published about other similar algorithms. He's also concerned that it could cause problems by either identifying the wrong people, which would add stress to an already strained healthcare system and waste money, or by discouraging Facebook users from speaking frankly about their mental state with their peers.

"We know Facebook built it and they're using it, but we don't really know if it's accurate, if it's flagging the right or wrong people, or if it's flagging things too early or too late," Torous said.

Krishnan-Sarin and University of Southern California preventive-medicine professor Jessica Barrington-Trimis are concerned that even if Juul helps adult smokes, the products could hurt thousands of young people who wouldn't have otherwise smoked by making them more likely to pick up a cigarette.

"We want smokers to quit. If you can provide them with a cleaner form of nicotine, that's great. But many kids say they go through a whole pod in 24 hours. That's very concerning. Nicotine is a neurotoxin to the adolescent brain," Krishnan-Sarin said.

In a similar vein, Hercher and Ross are worried that people at a high risk of disease who take a 23andMe test could be harmed. Both of them said the tests are set up in a way that customers could believe that they've been screened for a serious disease such as cancer, for example, when in reality, they have not.

One case of this occurred in 2010 when an oncologist named Pamela Munster took a 23andMe breast cancer test and was relieved to learn she was negative, as the New York Times reported.

Two years later, Munster learned she had breast cancer. A more thorough clinical test revealed that indeed, she had a genetic mutation that had raised her risk of the disease. It was a mutation that 23andMe didn't test for.

"It's like you bring your car in for service and they say, 'OK, we checked your rear right brake and it's working,'" Hercher said. "If you think you've just had your car serviced, you've not been well informed."

A developing playbook for health-tech startups: Publish more research

To John Ioannidis, an early Theranos skeptic and a professor of medicine at Stanford University, the time is ripe for another Theranos-like debacle in health tech. In January, he and a team of researchers published a study that suggests that of all the well-funded health-tech startups out there, very few are publishing scientific literature.

The answer to avoiding that problem is simple, he and his coauthors suggest: The startups need to start publishing results. "Startups are key purveyors of innovation: holding them to a minimum standard of evaluation is essential," they wrote.

Peer-review research involves subjecting your work to a group of outside experts in the same field. Whether it's a biotech company claiming its new therapy can cure cancer or a tech company that is trying to prevent suicide, those assertions can and should be measured and quantified, Ioannidis and his coauthors say.

Juul appears to have heeded Ioannidis' call.

Starting this year, the company began to publish health research and told Business Insider last month that it was beefing up its research efforts with a team focused on doing more of that kind of work. Business Insider also exclusively reported that Juul is also exploring a digital-health offering that could complement its devices with an app or other smartphone-based tool designed to help smokers quit.

In addition, Juul has made over its image and done away with ads that outside experts said appealed to teens. Advertisements that featured young models on bright backgrounds have been swapped for images of adults with pops of gray in their hair. A neon online color scheme has shifted to muted hues of navy and gray. Flavors such as cool cucumber and crème brûlée have been shortened to cucumber and crème.

Juul pod flavors

"We are committed to continuing to research the potential public health impact of our products and have over 100,000 participants enrolled in behavioral studies across the world," the Juul spokesperson said.

As Ioannidis noted in his paper, 23andMe is one of the few companies that is publishing. The company has put out hundreds of basic research papers looking at things like the genetics of diseases like depression. But clinicians say that's not enough.

Prioritize safety

In addition to publishing research, experts say startups need to place a clearer emphasis on safety and transparency. To do that, companies like 23andMe, Juul, and Facebook all need to think more about how their tools might impact potentially vulnerable people.

"There have to be quality controls, there has to be truthfulness," Hercher said. "Is simply having good information enough? There has to be a line somewhere."

Facebook maintains that its work in suicide does not fall under the domain of health, but instead is restricted to emergency response. It has not published any data on the algorithm.

As far as the world of genetic-testing is concerned, experts say it's still something of a Wild West for customers, but a handful of companies are trying to address that. They hope to combine the convenience and simplicity of 23andMe with the thorough nature of a clinical experience.

Invitae, one startup, recently announced plans to roll out a test that, like 23andMe's, could be ordered by consumers, only it would incorporate genetic counseling and require a doctor's sign-off. Last month, another startup called Helix launched a comparable test that includes optional genetic counseling. And Color Genomics has long had a test that works similarly and links customers to genetic counselors over the phone.

"There's some great science out there," Ross said. "I want to see more of it."

SEE ALSO: After you spit into a tube for a DNA test like 23andMe, experts say you shouldn't assume your data will stay private forever

DON'T MISS: A Silicon Valley VC in the hottest area of healthcare explains what's driving a surge in interest for mental-health startups

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NOW WATCH: There are 7.7 billion humans on Earth today. Here's what would actually happen if Thanos destroyed 50% of all life on the planet.

From rags to riches: a former care worker inherited a $60 million estate after DNA test confirms he's heir to the property

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Penrose estate

  • A 31-year-old British man inherited a $60 million, 1536-acre estate in Cornwall, England after learning, through a DNA test, he was heir to the property.
  • Jordan Adlard Rogers, a former care worker, has since moved into the property with his partner and their newborn son.
  • Visit INSIDER's homepage for more stories.

Jordan Adlard-Rogers just wanted to meet his father.

Instead, the 31-year-old former home care worker inherited his sprawling $60 million, 1536-acre estate in Cornwall, England, with the help of a DNA test that confirmed he was the son of British aristocrat Charles Rogers. He has since moved into the property, which the Rogers family has lived in for generations.

"I'm now starting to get my feet under the table here. People say I'm lucky but I would trade anything to be able to go back and for Charles to know I was his son," Adlard-Rogers told CornwallLive."Maybe then he might have taken a different path."

During an inquest last week, it was revealed that Rogers had struggled for four decades with drug abuse. He was found dead in his car last August following a drug overdose.

 

Adlard-Rogers told Cornwall Live that he believed Rogers could have been his father for more than 20 years, and tried repeatedly to arrange a DNA test. The test was finally carried out after Rogers died.

The Rogers family currently has a 1,000 year lease on the property. It was granted to them by the National Trust in 1974 in exchange for public access to the Penrose estate and grounds. 

Adlard-Rogers has quit his job since moving into the property with his partner, Katie, and their newborn son, according to People. He will reportedly receive around $1,300 a week from the family's trust fund — a stark contrast from his humble upbringings.

"I've been at the point of worrying about the next bill and have had a tough start in life but now I'm here I want to help people," Adlard-Rogers told CornwallLive. "I'm not going to forget where I've come from."

 

 

 

 

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Why SpaceX delivered living bits of human organs to the ISS for NASA

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NASA International Space Station

  • While in orbit on the International Space Station (ISS), microgravity rapidly changes astronauts' bodies, suppressing their immune systems and even causing their muscles and bones to atrophy.
  • To find out more, NASA contracted SpaceX to send "tissue chips" containing cells from human organs to the ISS.
  • Investigating these chips, which simulate how normal cells behave, will enable scientists to learn more about how to keep astronauts healthy during long-term space travel.
  • Visit Business Insider's homepage for more stories.

Though experiments on how living in space affects the human body certainly aren't new, there's still a great deal we don't really understand about the effects of living in space for extended periods of time.

To find out more, scientists from SpaceX have sent new technology called tissue chips, which contain cells from human organs, to the International Space Station (ISS). These chips could help predict how effective certain potential medicines might be in humans.

red blood cells

According to a NASA press release, microgravity can cause changes in human cells that look similar to accelerated aging and disease processes.

While in orbit on the ISS, microgravity rapidly changes astronauts' bodies. Itt suppresses their immune systems, and their muscles and bones atrophy.

Each of the chips that have been transported is designed to mimic a different part of the human body. A whole host of cells have been sent to the ISS, from the kidneys and lungs to our bones and the blood-brain barrier.

Read more:NASA will attempt to knock an asteroid out of orbit for the first time in 2022

As part of the investigation, a fluid that mimics blood, and can contain drugs or toxins, will pass through the chips.

This means scientists will be able to look at how a few weeks in microgravity would affect cells, rather than having to spend months on a similar experiment on Earth.

Ultimately, this will enable the researchers to learn more about how to keep astronauts healthy during long-term space travel.

They also believe the research will be critical to developing new medical treatments back on Earth.

Telomeres

Under the effects of microgravity, human cells age rapidly

Changes that would normally take place over a few months on Earth take mere weeks in space. This is thought to be related to caps at the end of chromosomes in our cells called telomeres, which help protect our DNA from damage.

As we age or experience stress, these caps shrink. Scientists think telomeres should change in length while you're in space — not just from aging and natural causes but from other stressors, including cosmic radiation and zero gravity.

Through sending these cells out to the ISS, scientists will also be able to explore the effects of new drugs on diseases at a faster rate.

Read more: NASA's 4-year twin experiment gets us closer to Mars than ever before

SEE ALSO: NASA helped make a synthetic DNA structure that may shed light on what alien DNA could look like

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Investigators in Wisconsin used a DNA database to crack a 43-year-old murder case and arrest a man

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wisconsin murder

  • Authorities in a small Wisconsin town arrested an 82-year-old handyman in connection with a 1976 murder after conducting genetic genealogy analysis on DNA from the crime scene. 
  • Ray Vannieuwenhoven was taken into custody in connection with the murders of David Schuldes and Ellen Matheys, who were shot at a campsite. 
  • Vannieuwenhoven's co-workers and neighbors were shocked upon his arrest, with one saying he had always appeared to be a "normal guy." 
  • Visit Business Insider's homepage for more stories.

LAKEWOOD, Wis. (AP) — Word of the arrest — via a friend's text message — hit Wayne Sankey like a thunderbolt.

"I said, 'You gotta be kidding me,'" Sankey recalled. "And then I told the wife and she couldn't believe it. 'There's no way,' she said. 'Ray down the road?'"

Ray Vannieuwenhoven was his next-door neighbor — a helpful, 82-year-old handyman with a gravelly voice and a loud, distinctive laugh, the kind of guy who always waved from his car.

The widower and father of five grown children had lived quietly for two decades among the 800 residents of Lakewood, a northern Wisconsin town surrounded by forests and small lakes.

Now authorities were saying this man was a cold-blooded killer. They had used genetic genealogy to crack a cold case that stretched back well into the 20th century — a double murder 25 miles southwest of Lakewood.

For nearly 43 years, Vannieuwenhoven had lived in plain sight, yet outside detectives' radar.

It was just too much to be believed. Was the guy next door really a monster?

___

David Schuldes and Ellen Matheys, engaged to be married, set up their campsite at a secluded spot in McClintock Park on Friday afternoon, July 9, 1976.

It appeared they were alone.

Schuldes was a 25-year-old part-timer in the circulation department of the Green Bay Press-Gazette; Matheys, 24, worked at the University of Wisconsin-Green Bay library.

They were about to go for a walk, according to court documents and news reports of the time. First, Matheys stopped to use the restroom.

Two shots from a .30-caliber rifle shattered the quiet. One bullet struck Schuldes' neck from 50 feet away, killing him instantly. The other bullet lodged in a bathroom wall.

Matheys ran, with the killer in pursuit, investigators say. He caught and raped her, then shot her twice in the chest.

Her body was found 200 yards from where Schuldes lay, a camera slung over his shoulder.

Investigators were stumped: The killer took no money and left Matheys' purse in the couple's car. They didn't know why the couple was targeted, and leads were scant. For months, campers avoided McClintock Park.

DNA profiling in the '90s brought new hope, but detectives got no matches when they submitted the semen from Matheys' shorts to the FBI's national database.

Last year, detectives contacted Virginia-based Parabon NanoLabs, a DNA technology company whose work with genetic genealogy analysis has helped police identify 55 suspects in cold cases nationwide since May 2018, according to the company. Parabon uploads DNA from crime scenes to GEDmatch, a free, public genealogy database with about 1.2 million profiles, all voluntarily submitted by people who've used consumer genealogy sites like Ancestry.com and 23andMe.

California law enforcement used GEDmatch to capture the alleged Golden State Killer last year by finding distant relatives and reverse-engineering his family tree.

Parabon's experts completed Vannieuwenhoven's family tree in late December. They'd found his parents, who had lived in the Green Bay area. Now detectives needed DNA samples from Vannieuwenhoven and his three brothers. Two were ruled out with DNA samples collected from one brother's trash and another's used coffee cup.

sketch wisconsin murder

On March 6, two sheriff's deputies knocked on Vannieuwenhoven's door, pretending they wanted him to fill out a brief survey on area-policing. They told him to put the survey in an envelope and seal it with his tongue.

Detectives didn't need to visit the fourth brother. Eight days later, Vannieuwenhoven was in custody.

___

At Vannieuwenhoven's first court appearance, on March 22, bond was set at $1 million.

"Not guilty, not guilty, not guilty," Vannieuwenhoven said, when the judge asked him if he understood the charges. His next court date is June 19.

Kurt Schuldes, 68, a cousin of David Schuldes in Green Bay, welcomed the news of an arrest, but lamented the time it took: "He just got away with it for way too long, unfortunately."

"It was a long time coming," said Cynthia Chizek, Matheys' 53-year-old niece, who lives in Henderson, Nevada. "It's just something that always hangs over your head, knowing that there's someone out there who did this heinous crime."

Prosecutors and Lakewood residents, meanwhile, were left with the question: Who is Raymand Lawrence Vannieuwenhoven?

Richard Leurquin, twin brother of Vannieuwenhoven's dead wife, Rita, said his brother-in-law was "a very loving father to his wife and kids." He's convinced Vannieuwenhoven is innocent.

The Vannieuwenhovens were married until her death in 2008, a few months after they celebrated their 50th wedding anniversary. Sankey said after Rita died, Vannieuwenhoven spent his days fishing, hunting, and going on weeks-long camping trips.

But Vannieuwenhoven had a dark side. To start, this isn't his first time in jail.

In 1957, when he was 20, married, and going by the name Lawrence Vannieuwenhoven, he was jailed for six months for an unprovoked attack on a 17-year-old girl. She was walking with three friends when Vannieuwenhoven struck her on the back, face, and shoulder. Shortly before, police said, Vannieuwenhoven also tried to attack a 16-year-old girl.

Vannieuwenhoven said before sentencing he "was only trying to scare the girls," the Press-Gazette reported at the time.

In 1960, he pleaded guilty to not providing financial support to his wife and their 1-year-old daughter, the Press-Gazette reported then. He was on probation for a year.

More recently, some neighbors caught glimpses of a menacing side when he drank. He stopped only a few years ago, for his health, they said.

"I know this much — when he was drinking he was one son of a bitch. You didn't want to be anywhere near him when he was drinking. Not just me, a lot of people," said Fred Mason, 66, who works at the town dump where Vannieuwenhoven was seen frequently, rummaging through scrap piles for small engine parts.

Robert Ganzell, 86, and his wife sometimes dined out with Vannieuwenhoven. He heard from others that he had a temper when he drank, but Ganzell said he never witnessed it.

As for the murder charges, Ganzell was nonplussed. "Never thought of it being him, doing anything like that," Ganzell said. Aside from that, he had little to say about Vannieuwenhoven.

In fact, the neighbors realized that they knew little about this man. For instance, it's unclear where he worked before retiring. Sankey said he's heard Vannieuwenhoven was an iron worker, but he also told Sankey he used to haul and deliver boats.

Sankey, 68, said he and his wife are still coming to terms with the allegations against their next-door neighbor, the guy who would occasionally repair his lawnmower or snow blower.

"People had the impression that he was a very good, normal person, just a retired guy," Sankey said. "No matter where you went you'd mention Ray and they'd say, 'Oh yeah, old Ray.' That was basically about it. It's still hard to believe."

___

This story has been corrected to fix the spelling of Vannieuwenhoven in one instance. It had been misspelled "Vannieuwenoven."

___

Associated Press researchers Rhonda Shafner and Jennifer Farrar contributed from New York.

Read more: 

A high school valedictorian used a pint of strawberries to give a powerful speech about 'migrant culture'

Authorities are searching for 8 climbers who have been missing for a week in the Indian Himalayas

All but 1 of the Virginia Beach shooting victims were city employees

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6 things a DNA test can tell you about your health

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dna testing

  • Genetic testing is an important health-care tool that can tell people a lot about their bodies.
  • These tests analyze a sample of a person's DNA and look for specific changes associated with different conditions.
  • Often, test results can help doctors diagnose and predict a person's risk for developing a disease.
  • Other DNA tests can tell people about whether they're predisposed to certain traits.
  • INSIDER spoke with Dr. William G. Feero, M.D., Ph.D., an associate professor of Community and Family Medicine at the Geisel School of Medicine at Dartmouth, to get a better understanding of how different genetic DNA tests work, and what they can teach people about their health.
  • Visit INSIDER's homepage for more stories.

Getting a DNA test can give you a window into your health.

Today, there are numerous genetic tests available to people at the clinical and consumer level. In general, they involve a mouth swab, hair sample, or a blood test to allow doctors, scientists, and individuals to look closely at a person's DNA for variations (mutations) that are linked to particular traits or conditions.

But it's important to note that clinical and consumer tests are not created equal. In fact, many home DNA tests aren't regulated to the degree that medical DNA tests are. 

INSIDER spoke with Dr. William G. Feero, MD, PhD, associate professor of Community and Family Medicine at the Geisel School of Medicine at Dartmouth, to learn how medical DNA tests work and the different ways they can be useful for understanding our health. Regardless of your motivations for seeking DNA testing, you should always consult a physician about interpreting your results.

Diagnostic tests can confirm whether you have a hereditary disease like Huntington's disease, sickle cell anemia, Marfan syndrome, and cystic fibrosis

Most of the time, doctors use genetic testing as a tool to help confirm a genetic disease diagnosis in patients who are experiencing specific symptoms, said Feero. 

During a medical DNA test, a licensed practitioner such as a nurse or doctor collects a small sample of hair, skin, saliva, or blood from a patient. Pregnant people may also give a sample of amniotic fluid (aka the liquid around an unborn child.)

According to the National Institutes of Health, genetic tests (at the clinical level) can be used to identify 2,000 hereditary diseases and conditions. Some examples of common hereditary diseases that these tests might find include cystic fibrosis, familial hyperlipidemia, and muscular dystrophy.

"Diagnostic genetic tests look for specific changes in the DNA, in specific genes that are relatively well-proven to cause those genes not to work properly, and for the person to develop disease," Feero said. "They are highly reliable and very accurate."

Dna testing

One of the benefits of these types of genetic tests is that they allow doctors to detect hereditary diseases at every stage of life. In some cases, if doctors are able to identify the disease before symptoms progress to a severe level, they can help patients plan for managing the condition.

This is especially useful for conditions like familial hyperlipidemia, which can result in premature heart attacks and stroke. Catching these types of diseases during their early stages (as in, before a first heart attack) means a patient will possibly have more options for treating the disease.

This type of testing is usually only done in a health-care setting.

Presymptomatic genetic tests may tell you whether you're going to eventually develop a (hereditary) disease you don't actually have yet

When a healthy person with no symptoms has a documented family history of a disease, such as diabetes, genetic tests can analyze specific markers in their genes that are related to that disease, said Feero. Doctors may then use this information to predict whether that person is at risk of developing the condition. 

"One clear cut example is Huntington's disease. It is a single-gene disorder that causes dementia, and it usually starts when someone is in their 50s or 60s," he told INSIDER. "If you have the mutation associated with that disease, you are 100% going to get it. (In the case of Huntington's disease, that mutation is an expansion of the region of DNA in a particular gene.)"

But when it comes to diseases that involve multiple mutations, occurring in one or a few genes, determining a person's risk is a little more complex, said Feero. Some conditions aren't just caused by changes in a single gene, but rather, a whole range of changes across, potentially, multiple genes. Feero said genetic testing can be useful by allowing doctors to analyze the different types of gene changes. This can give them an idea of whether someone will get a disease, how bad it will be, and perhaps insights on potential treatments.

A carrier test can tell you if your DNA contains a mutation for a genetic disorder that might affect your unborn child

genetic counselor

Sometimes people who are totally healthy can have mutations in their DNA that are associated with different genetic disorders, explained Feero. This is called being a carrier, and it basically means their DNA inherited a single copy of the gene mutation for that hereditary condition or disease. Generally, the condition doesn't actually affect that person or their health, because their DNA still has an additional copy of that same gene that doesn't have the mutation.

For example,  if you're a carrier for a disease mutation linked to cystic fibrosis, it doesn't mean you have cystic fibrosis. But there's a 50% chance that you will pass along a copy of that same mutation to your future children, and cause them to also be a carrier for that condition. However, when two future parents turn out to be carriers for the same genetic disorder, their child may develop the disease, explained Feero.

He told INSIDER, "If a woman is a carrier of a mutation for cystic fibrosis, and her partner is also a carrier of a mutation in one of his cystic fibrosis genes, their baby has a one in four chance of inheriting two bad copies of those genes. [As a result,] there's an increased chance that baby will be born with cystic fibrosis."

Expanded carrier status screening is a type of genetic DNA test that can estimate reproductive risks in healthy individuals, said Feero.

He told INSIDER, "Expanded carrier status screening can be useful if you are a woman who is contemplating pregnancy, and you want to know what genetic changes you might have in your DNA that could predict risk for multiple relatively rare, serious diseases in your newborn. For example, [certain] changes in your DNA might be associated with cystic fibrosis or Tay-Sachs risk for the baby."

Today, many fertility clinics and other health-care facilities offer tests that can tell you if you are a carrier for different genetic disorders. There are also several direct-to-consumer DNA tests that provide these types of results, too.

According to the National Human Genome Research Institute, hereditary conditions that might be detected in a carrier test include Huntington's disease, sickle cell anemia, spinal muscular atrophy, polycystic kidney disease, Tay-Sachs disease, and Down syndrome.

Knowing this information allows parents to make well-informed choices about family planning.

A predictive genetic test may give you an idea of your risk for developing some hereditary cancers, but they aren't 100% certain

According to the National Cancer Institute, some genetic tests can provide people with information about whether they inherited mutations associated with several types of hereditary cancer. This includes certain types of breast cancer, colon cancer, melanoma, and sarcoma. One well-known cancer-related mutation that a DNA might check for is the BRCA 1/BRCA 2 gene mutation.

"If you have one of those classic BRCA genes mutations, your risk of developing breast cancer is very high," said Feero.

AP_02053116543

For some people, receiving genetic test results that come back positive for a mutation like this can be life-changing. Feero noted this can make that person eligible for additional tests like ovarian cancer and breast cancer screenings, starting at an early age. It may also influence them to talk with their family members about potentially getting tested for mutation as well.

And depending on the other risk factors a person has (like their weight, diet, and other health conditions), it may lead them to take further action to help prevent the disease before it begins. In this case, if someone has the BRCA 1 or BRCA 2 gene mutation, along with other risk factors, they may decide to get a mastectomy (breast removal) to minimize their chances of cancer occurring.

However, it's important to remember that not all cancers are caused by hereditary mutations. In fact, many of the mutations that cause cancers are sporadic, which means they happen randomly and unexpectedly due to environmental factors. This means a genetic test can't always say for certain whether someone will get cancer, said Feero.

Conversely, if someone does have the BRCA 1 or BRCA 2 gene mutation, it doesn't mean they're 100% guaranteed to get breast cancer, either (though their risk is MUCH higher than the general population).

Still, if you have a family history of cancer and you're concerned about your risk, you should talk with your doctor about this type of testing.

Depending on the type of DNA test you get, you may also be able to learn about whether you have some increased risk for developing conditions that are caused by multiple factors, like diabetes

Using genetics to predict whether someone will develop a disease is a very complex process. Tests that are done in a clinical setting like a doctor's office may look for different things than a DNA test you can buy at home. A direct-to-consumer test usually involves a swab that is then mailed into a lab

"Direct-to-consumer DNA tests use what is called SNP-based [pronounced 'snip'], or single-based nucleotide polymorphism testing. They look for changes in DNA that are associated potentially with mutations that actually cause disease, that often aren't the mutations themselves," Feero told INSIDER.

Most of the time, these tests can tell you if your DNA shows variations that make you predisposed to developing a disease or condition. But this type of result is a lot different than saying you're definitely going to get a disease.

This is especially the case when it comes to diseases where your genes and lifestyle choices play a role in whether you get it. Results from a SNP test are just one piece of the puzzle, while other factors like your diet, fitness level, blood pressure, and environment also contribute to whether you'll get that disease.

Currently, the FDA says that some DNA tests are approved to share information regarding a person's genetic health risk for developing 10 medical conditions, including Parkinson's disease, celiac disease, Late-onset Alzheimer's (a progressive brain disorder that affects memory), along with several blood-clotting and tissue disorders.

Still, Feero noted much the mainstream medical community remains uncertain about how accurate and useful these polygenic risk scores are in predicting whether someone will get a disease.

"These risk scores for conditions like type 2 diabetes are really probabilistic," said Feero. "They predict some increased risk, but are definitely not deterministic, which means they don't tell you for certain that you will develop type 2 diabetes. Often the increased risk predicted only accounts for a small amount of the total risk a person has for developing a disease."

He added that it's important to consider these genetic risk scores only account for one portion of your risk.

"People should be careful about evaluating their reasons for seeking DNA testing," said Feero. "They should try to understand from a knowledgeable healthcare provider what the test can and can't tell them about the particular health conditions they may be interested in testing for."

Some home DNA tests may be capable of telling you whether you're likely to have certain traits like lactose intolerance or a higher body weight

Many consumer DNA tests now provide people with information that isn't related to whether or not they have a serious genetic disorder.

SNP testing can detect variations in a person's genome that are associated with different traits that aren't necessarily diseases as well as medical conditions, said Feero.  As is the case for diseases in which multiple genetic variants play a role, the associations for traits are made based on research that has linked genetic variations in certain populations to these traits. By comparing your DNA to the DNA of others with these traits, these tests can infer traits you might have.

For example, some test results might tell a person if they're predisposed to lactose intolerance or moving around when they sleep.

gene testing

It's important to note these trait tests, as well as SNP-based tests for disease risk, do have limitations

Feero pointed out that one issue with these consumer tests is that they only test for a limited number of relatively common genetic variants. This can be problematic if you're someone from an underrepresented population because your results might not be as accurate as those for someone from a population group that has been extensively studied for associations between variants and traits and diseases.

And even if you are from a population that has been well studied and is highly represented in available research databases, it's important to remember these SNP-based test results are not considered a medical diagnosis.

But that doesn't mean they can't be beneficial to you. Learning that you may be predisposed to a certain trait might influence you to make positive lifestyle changes that can improve your health overall. For instance, if you learn that you're more likely to have a higher weight than the average person, you might feel inspired to work out more often at the gym or start a new fitness plan. In addition, some results may encourage you to have important conversations with your doctor about your diet or fitness plan.

But as far validity goes, perhaps it's best to take these types of results with a grain of salt.

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People's DNA ancestry results keep changing as the sites gather more data: 'What's my real identity?'

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23andme testkit

  • People's ancestry results keep changing as sites gather more data.
  • "We try to convey the notion that this is a living document," said Robin Smith, head of 23andMe's ancestry division.
  • As more data pours in, it tweaks the ancestry results.
  • "Your genes really don't carry racial, ethnic, and cultural markers. We do that," a bioethicist at NYU's school of medicine said.
  • Visit INSIDER's homepage for more stories. 

23andMe caused Leonard Kim not one identity crisis but two.

The first came in 2016, when Kim, who was raised believing he was 100% Korean, took the company's DNA ancestry test and learned he was almost half Japanese. Then, earlier this month, he was out for drinks with his wife and some friends near his Los Angeles home when someone questioned his Japanese ancestry.

So Kim, 34, took out his phone and consulted the 23andMe website. That's when he discovered his ethnic identity had changed. The site that once told him he was about 40% Japanese now pegged that figure at 5%. He was, in an instant, fully Korean again.

Korea's history with Japan is one stained with colonization, cultural oppression, and bloodshed. It took months of denial and soul-searching for Kim to accept a previously unknown Japanese lineage. Learning it was all a waste felt like existential whiplash.

"People in general, we have so much of our story that we use to define who we are, and when you have it all come together and then shatter apart, it puts you in this strange place," Kim said. "It's like, OK, so what's my real identity?"

23andme

Kim's story is not unique among the millions of people who have bought into consumer genetic testing for clues about their ancestry. Peter Cho, the head of design at a tech company, had roughly the same experience after submitting his saliva sample to 23andMe, yo-yoing from a shocking 58% Korean to 95%. Other customers have had less jarring changes, watching, for example, as small amounts of Spanish DNA have vanished to be replaced by genetic ties to Italy.

To the companies selling tests, the ever-evolving DNA ancestry reports are more of a feature than a bug. Each website is upfront about the fact that a given test result is only as accurate as the data behind it. With more data come more granular conclusions that almost inevitably tweak ancestry results. And because genetic datasets have long been overwhelmingly white, even an incremental update can lead to pendular shifts for customers of color. The same phenomenon holds true for genetic tests offering information on health or disease risk.

"We try to convey the notion that this is a living document," said Robin Smith, head of 23andMe's ancestry division. "It does change over time."

It's easy to see why more consumers might take note of the changes. Direct-to-consumer genetic testing has ballooned from a luxury niche into a viable market, with spit tubes available by the box at Walgreens and marked down for Christmas or Mother's Day. The field's two biggest companies, 23andMe and Ancestry, claim to have tested more than 25 million people combined.

The tests offer an educated scientific guess, but the way they're marketed could easily convince customers that they amount to conclusive proof of identity, said Debbie Kennett, a genealogist who has written at length about the genetics of ancestry.

One 23andMe commercial follows a tourist on what appears to be a personal genetic sojourn, trekking around the globe as her DNA relation to each region  — 29% East Asian, 3% Scandinavian — flashes on the screen. (The company calls this "heritage travel" and just partnered with Airbnb to promote it.) Another ad from Ancestry features a man named Kyle discovering his long-assumed German lineage is instead linked to the British Isles, prompting a costume change from lederhosen to a kilt.

"I think the way the tests are marketed is misleading, because people are led to believe they'll take a test and find out who they are or where they're from, and that is not the way to view these results," Kennett said.

A spokesman for Ancestry said its "testimonial ads" are based on customers' "first-hand experience, in their words."

The whole premise of spitting into a tube and learning, say, that you are French or Colombian is inherently fraught, said Arthur Caplan, a bioethicist at NYU School of Medicine. DNA is science, yes, but ethnicity is a cultural construct, and borders are political ones. To blur the lines therein is to invite trouble, he said.

"This idea that you are your genes is just false," Caplan said. "Your genes really don't carry racial, ethnic, and cultural markers. We do that. We divide them up. So there's always been an underlying suspicion on my part that there's more culture than biology in these [ancestry] reports."

Smith, from 23andMe, said the company is mindful of the distinction between genetics and identity, both in its marketing and in how it presents test results. Each of the company's database updates is accompanied by a blog post explaining what it does and doesn't mean for customers, he said.

"The bedrock for us has always been the science," Smith said. "We try to fixate on what does the DNA tell us. We're clear up front that DNA is not identity. DNA is not culture."

For some customers, that doesn't sate the temptation to divine meaning from ancestry test results — and it doesn't ease the sting of having those results shift under their feet.

Angelica Duke had a genealogical mystery. Her grandfather, since deceased, spent his life insisting that his mother was a lady in waiting to the queen of Spain. On the one hand, that claim clashed with the family's Scottish heritage, and Duke's grandfather had a habit of exaggerating. On the other, he spoke fluent Spanish, and his name, Frederic, was inexplicably lacking the K one would expect from a Scot.

It all seemed to come together two years ago when Duke's 23andMe ancestry results revealed a small percentage of Iberian DNA, leading her family to conclude that, "OK, maybe there is some veracity to this claim," she said.

Then, earlier this month, Duke signed into 23andMe and discovered that her ties to Spain had evaporated, in their place a connection to Italy. She knew her results had always been subject to change, and that trace amounts of DNA could never close the book on a family mystery. Still, the update was "a little bit of a slap in the face," she said.

"It is serious," Duke said. "It's something people internalize, to a certain extent."

That was the case for Kim. He works in marketing, where he gets paid to help people build their personal brands. That means encouraging them to dispense with artifice and "tell their true stories," Kim said.

Since that night at the bar, following his own advice has grown more complicated.

"Maybe I should be trying to dissociate my connection to my heritage because I can't trust the data," Kim said. "Maybe I should go back to being just Leonard and not Leonard who's a Korean or Leonard who's a Japanese person, which is where I started before I took this test."

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At-home ancestry DNA kits may make it easier for enemies to target you, the Navy's top officer says

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US Navy John Richardson information warfare

  • Information gleaned from at-home ancestry DNA kits can help foes better tailor their weapons, the Navy's top officer said last week.
  • While DNA information can be misused and should be treated with personal information, it's unlikely that enemies would use it to design a unique weapon for a specific person.
  • Visit Business Insider's homepage for more stories.

The Navy's top officer warned against using popular at-home ancestry DNA test kits last week, saying scientific advancements are making biological weapons more tailorable.

Biological weapons that can target specific groups or individuals vulnerable to pathogens or other diseases are a growing national security concern, Chief of Naval Operations Adm. John Richardson said during a July 3 speech on nuclear deterrence in Washington, DC.

"Be careful who you send your DNA to," Richardson said at the event, hosted by the Mitchell Institute for Aerospace Studies. "There's a number of those companies where you can go and find out what your makeup is. That's a lot of information.

"You learn a lot about yourself, and so does the company who's doing it," the CNO added.

More than 26 million people have taken at-home ancestry tests, according to a study from the Massachusetts Institute of Technology. Based on the rate at which people are buying the kits, that number could jump to 100 million by 2021, the study adds.

DNA

Officials with AncestryDNA, one of the leading companies that offer mail-in tests, says protecting customers' privacy and data remains the company's highest priority.

"Customer DNA data in Ancestry's systems is de-identified, encrypted and segmented to a separate, dedicated access-controlled storage platform," Jasmin Jimenez, an Ancestry.com spokeswoman, said. "Our customers maintain ownership and control over their own data at all times."

The company doesn't share customer DNA with insurers, employers or third-party marketers, she said. And personal data, she added, is only provided to law enforcement officials if there is a valid legal process, such as a court order.

A spokesman for 23andMe, another popular genetic test site, cited similar privacy safety protocols, with multi-layer encryption of customer data and restricted access to the company's systems.

Paul Rosenzweig, a cybersecurity expert with R Street Institute who served as President George W. Bush's Department of Homeland Security deputy assistant secretary for policy, said people must treat their DNA like any other personal data.

"Share it sparingly and only with people you trust, because it can be misused by malicious actors," he said.

Steven Block, a biology and applied physics professor at Stanford University, agrees that people should be mindful of database hacking threats. But they tend only to store a limited amount of data, he added, since people share just a subset of their genetic info — about 1/1,000th of their full DNA — when taking most ancestry tests.

LifeProfile DNA Kit 2

"If you have the physical swab, then you have a sample of the complete DNA information for the individual, and the potential to do much more with that than, say, the sort of limited information that ancestry-kit companies collect and store," Block said.

Unless someone carries a rare mutation, it's unlikely that information from a DNA test would be used to personalize a bioweapon, he added, since it would require so much work to develop and test it.

"All that requires special expertise and resources," Block said. "This is not the sort of thing someone might cobble together readily in a garage — at least not any time soon. ... Also, you have to ask whether a personalized bioweapon is really the most practical way to assassinate someone."

That's not to say bad actors have never relied on action-movie-style assassination techniques. Block referenced the 2017 assassination of Kim Jong Nam using a nerve agent-soaked cloth; the 2006 case in which former Russian agent Alexander Litvinenko drank poison-laced tea; and the 1978 murder of Bulgarian dissident and diplomat Georgi Markov, who was killed with a ricin-imbedded pellet launched from an umbrella.

"One can never rule out the use of an exotic methods altogether, but such methods will continue to be rare, I suspect," he said. Perhaps more alarming is the idea of using a bioweapon to target certain groups that have shared inherited traits. For now, Block said that threat remains low.

"I suspect the time will come when tailored bioweapons will become a serious possibility," he said. "We are not quite there yet, in my opinion."

-- Gina Harkins can be reached at gina.harkins@military.com. Follow her on Twitter@ginaaharkins.

SEE ALSO: 6 things a DNA test can tell you about your health

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Animated map shows how cats spread across the world

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Following is a transcript of the video.

You can find house cats on every continent except Antarctica. But that wasn't always the case. How did cats make it across oceans and into households worldwide? 

The secret lies in ancient cat DNA, which a team of scientists traced back thousands of years. They report their results in a paper recently published in the journal Nature.

Here's how cats spread across the world. 

It started around 10,000 years ago in what's now modern-day Turkey. DNA analysis shows this is where cats' wild ancestors likely originated. Wild cats proved to be effective rodent control for early farmers. 

As the agricultural revolution spread, cats joined for the ride. By 2,500 BC, cats had reached Cyprus where no cats had existed before. Over the next few thousand years, they accompanied humans north into Bulgaria and Romania.

By 800 BC, cats had found their calling in Egypt. Cats weren't just an object of worship here. Egyptian cats, specifically, became popular among the Romans and Vikings who brought cats on their ships for pest control. 

These two groups took the feline revolution by storm. 

Helping cats spread across all of Africa, Europe, and Asia. By the time Europeans were sailing to the Americas cats were common shipmates.

Today, one-third of American homes have at least one cat. That's about 93.5 million house cats in the US, alone. 

Now that they've conquered the world at humans' side, cats can rest easy.

EDITOR'S NOTE: This video was originally published on September 23, 2017.

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