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Goodnight. Sleep Clean.As your body sleeps, your brain is quite actively playing the part of mental janitor

Goodnight. Sleep Clean.As your body sleeps, your brain is quite actively playing the part of mental janitor | The future of medicine and health | Scoop.it
Why do we have to rest? Meet your brain’s janitorial staff.

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In a series of new studies, published this fall in the journal Science, the Nedergaard lab may at last be shedding light on just what it is that would be important enough. Sleep, it turns out, may play a crucial role in our brain’s physiological maintenance. As your body sleeps, your brain is quite actively playing the part of mental janitor: It’s clearing out all of the junk that has accumulated as a result of your daily thinking.

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No, You Do Not Have to Drink 8 Glasses of Water a Day

No, You Do Not Have to Drink 8 Glasses of Water a Day | The future of medicine and health | Scoop.it
If there is one health myth that will not die, it is this: You should drink eight glasses of water a day.

It’s just not true. There is no science behind it.

And yet every summer we are inundated with news media reports warning that dehydration is dangerous and also ubiquitous.

These reports work up a fear that otherwise healthy adults and children are walking around dehydrated, even that dehydration has reached epidemic proportions.

Let’s put these claims under scrutiny.

I was a co-author of a paper back in 2007 in the BMJ on medical myths. The first myth was that people should drink at least eight 8-ounce glasses of water a day. This paper got more media attention (even in The Times) than pretty much any other research I’ve ever done.

It made no difference. When, two years later, we published a book on medical myths that once again debunked the idea that we need eight glasses of water a day, I thought it would persuade people to stop worrying. I was wrong again.
Many people believe that the source of this myth was a 1945 Food and Nutrition Board recommendation that said people need about 2.5 liters of water a day. But they ignored the sentence that followed closely behind. It read, “Most of this quantity is contained in prepared foods.”
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How to optimise your brain's waste disposal system

How to optimise your brain's waste disposal system | The future of medicine and health | Scoop.it
The human brain can be compared to something like a big, bustling city. It has workers, the neurons and glial cells which co-operate with each other to process information; it has offices, the clusters of cells that work together to achieve specific tasks; it has highways, the fibre bundles that transfer information across long distances; and it has centralised hubs, the densely interconnected nodes that integrate information from its distributed networks.

Like any big city, the brain also produces large amounts of waste products, which have to be cleared away so that they do not clog up its delicate moving parts. Until very recently, though, we knew very little about how this happens. The brain’s waste disposal system has now been identified. We now know that it operates while we sleep at night, just like the waste collectors in most big cities, and the latest research suggests that certain sleeping positions might make it more efficient.
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Thumb ring diagnoses sexually-transmitted diseases

Thumb ring diagnoses sexually-transmitted diseases | The future of medicine and health | Scoop.it
Although most people with multiple sexual partners know that being checked for STDs is the responsible thing to do, many don’t do so because of the stigma associated with going to the clinic. That’s why a Silicon Valley-based startup has developed the Hoope ring. It’s worn on the thumb, and can reportedly diagnose diseases such as syphilis, gonorrhoea, chlamydia and trichomoniasis in less than a minute.

Users start by using Hoope’s electric pulse generator to numb their skin. They then press a button on the ring, which causes its single-use retractable needle to come out. That needle is then used to draw a blood sample, which is carried by capillary action to the ring’s lab-on-a-chip.

There, the blood flows through four microfluidic channels, in which it’s exposed to different antigens that have been synthesized to catch antibodies associated with each of the targeted diseases. If any of those antibodies are present and thus captured, an electrochemical reaction occurs which is detected by the onboard electronics.

The Hoope then wirelessly transmits the data to an app on the user’s smartphone, which tells them what disease has been detected, and where in their community they can go for treatment.
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How Changeable Is Gender?

How Changeable Is Gender? | The future of medicine and health | Scoop.it
THANKS to Caitlyn Jenner, and the military’s changing policies, transgender people are gaining acceptance — and living in a bigger, more understanding spotlight than at any previous time.

We’re learning to be more accepting of transgender individuals. And we’re learning more about gender identity, too.

The prevailing narrative seems to be that gender is a social construct and that people can move between genders to arrive at their true identity.

But if gender were nothing more than a social convention, why was it necessary for Caitlyn Jenner to undergo facial surgeries, take hormones and remove her body hair? The fact that some transgender individuals use hormone treatment and surgery to switch gender speaks to the inescapable biology at the heart of gender identity.

This is not to suggest that gender identity is simply binary — male or female — or that gender identity is inflexible for everyone. Nor does it mean that conventional gender roles always feel right; the sheer number of people who experience varying degrees of mismatch between their preferred gender and their body makes this very clear.

In fact, recent neuroscience research suggests that gender identity may exist on a spectrum and that gender dysphoria fits well within the range of human biological variation. For example, Georg S. Kranz at the Medical University of Vienna and colleagues elsewhere reported in a 2014 study in The Journal of Neuroscience that individuals who identified as transsexuals — those who wanted sex reassignment — had structural differences in their brains that were between their desired gender and their genetic sex.
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New antibiotic found in 'horse poop' mushroom - Futurity

New antibiotic found in 'horse poop' mushroom - Futurity | The future of medicine and health | Scoop.it
A fungus that grows on horse dung contains a protein that can kill bacteria.

The substance, known as copsin, has the same effect as traditional antibiotics, but belongs to a different class of biochemical substances. Copsin is a protein, whereas traditional antibiotics are often non-protein organic compounds.

The researchers led by Markus Aebi, a mycology professor at ETH Zurich, discovered the substance in the common inky cap mushroom Coprinopsis cinerea. Aebi and colleagues were interested in understanding how this fungus and various bacteria affect each other’s growth.

This involved cultivating the fungus in a laboratory along with several different types of bacteria. It was found that C. cinerea is able to kill certain bacteria. Further research demonstrated that the copsin produced by the mushroom is responsible for this antibiotic effect.

Copsin belongs to the group of defensins, a class of small proteins produced by many organisms to combat microorganisms that cause disease. The human body also produces defensins to protect itself against infections. They have been found, for example, on the skin and in the mucous membranes.

For Aebi, the main focus of this research project was not primarily on applications for the new substance.
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FTO, The Obesity Gene Decrypted: What You Need To Know

FTO, The Obesity Gene Decrypted: What You Need To Know | The future of medicine and health | Scoop.it

A gene called FTO has been a major blip on the obesity radar since 2007 – but we hadn’t yet figured out how the connection applied. Thanks to a number of lab mice, we now know that FTO directly affects how the body decides to store energy.

More specifically, a defect in this gene causes significantly more energy to be converted into fat rather than being burned as fuel. In effect – two otherwise identical subjects with identical habits would have significantly different levels of weight gain based entirely on this gene.

Intrigued by the implication, MIT scientists used DNA editing technology to switch on and off the gene in lab mice. Mice with the fully activated gene showed much higher metabolism rates and remained lean and fit regardless of diet.

There are several types of fat in the human body – brown fat, white fat, subcutaneous fat and visceral fat for example – and not all of them are harmful to your health.

White fat has two jobs – first to store energy, and second to produce hormones that are passed into the bloodstream. A particularly important hormone produced by white fat cells is adiponectin. Also known as GBP-28 or AdipoQ, adiponectin is a protein hormonethat plays a role in preventing Type 2 Diabetes among other things. Studies have shown however that in overweight people, production of this hormone is reduced.

Brown fat helps you stay warm, and actually burns white fat to produce energy. We have more of it as children than later in life, and there’s far less of it than white fat in general. Even in lean, healthy adults the ratio of white fat to brown fat is likely to be 100 to 1 by weight.  If properly stimulated, just 2 ounces of brown fat could burn up to 500 calories in a day.

When your body decides to create new fat cells, the choice of brown or white depends largely on a pair of genes that control thermogenesis (energy burn) – and these genes are directly affected by the FTO gene which acts like a “master switch”.

In essence, defective FTO genes cause your body to produce more white fat – while good ones cause your body to produce more brown fat.

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Systematic review shows 'smart drug' modafinil does enhance cognition

Systematic review shows 'smart drug' modafinil does enhance cognition | The future of medicine and health | Scoop.it
The drug modafinil was developed to treat narcolepsy (excessive sleeping), but it is widely used off-licence as a ‘smart drug’ to promote cognitive enhancement, where qualities such as alertness and concentration are desired to assist someone with, for example, exam preparation. Past studies on sleep-deprived individuals have shown a strong positive effect of modafinil on these functions, but there has been less attention and scientific consensus on the drug’s overall effectiveness as a cognitive enhancer in people that are not sleep-deprived – presumably the majority of people taking it.

Now, a new systematic review, published online in the peer-reviewed journal European Neuropsychopharmacology shows that modafinil does indeed confer significant cognitive benefits in this group, at least on a particular subset of tasks.

Dr Ruairidh Battleday and Dr Anna-Katharine Brem from the University of Oxford and Harvard Medical School evaluated all research papers on cognitive enhancement with modafinil from January 1990 to December 2014. They found 24 studies dealing with different benefits associated with taking modafinil, including planning and decision making, flexibility, learning and memory, and creativity.

Unsurprisingly, they found that the performance-enhancing capacity of modafinil varied according to the task. What emerged was that the longer and more complex the task tested, the more consistently modafinil conferred cognitive benefits.

Modafinil made no difference to working memory, or flexibility of thought, but did improve decision-making and planning. Very encouragingly, the 70% of studies that looked at the effects of modafinil on mood and side effects showed very little overall effect, although a couple reported insomnia, headache, stomach ache or nausea (which were also reported in the placebo group).
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Vomiting machine projects better understanding of how stomach bugs spread

Vomiting machine projects better understanding of how stomach bugs spread | The future of medicine and health | Scoop.it
Norovirus is a nasty bug that brings about inflammation in the stomach and intestines leading to pain, nausea, diarrhea and sometimes even death. It affects around 20 million people per year in the US, but despite its rampant nature, questions remain over how exactly it is transmitted. To shed further light on how one of the world's most common pathogens spreads between humans, scientists have built a vomiting machine to study its behaviour when projected into the air.

Earlier studies have indicated that norovirus can become aerosolized when a person vomits. This means that particles containing the virus can become airborne post-puke, lingering threateningly in the air or on surfaces ready to infect innocent bystanders. But these have only really been suspicions rather than proven scientific fact, so a team from North Carolina (NC) State University went searching for more concrete answers.
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A Fat-Burning Gene May Help Weight Loss

A Fat-Burning Gene May Help Weight Loss | The future of medicine and health | Scoop.it
There are many ways to get rid of excess fat, most of them involving diet and exercise. But scientists have identified a gene that may do the trick without all that effort.

A Holy Grail of fat—one that can turn more quickly into energy and melt away without building up in those unwanted bulges—is actually backed by some intriguing evidence. The trouble is, it’s hard to find in most adults. It turns out we have more of the less desirable kind, the white fat that accumulates around the middle and in our tissues, that potentially leads to dangerous health problems.

Now, scientists reporting in the New England Journal of Medicine report that they have connected the dots between the strongest gene associated with obesity and a way to make white fat more active. The idea is to literally give white fat fewer couch potato tendencies and help it more actively burn energy, more like the so-called brown fat that’s in such short supply.
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At Synthorx, Synthetic Biologists Put Artificial Life Forms to Work | MIT Technology Review

At Synthorx, Synthetic Biologists Put Artificial Life Forms to Work | MIT Technology Review | The future of medicine and health | Scoop.it
In the May 15, 2014, edition of the journal Nature, Floyd Romesberg’s chemistry lab at San Diego’s Scripps Research Institute published a paper titled “A Semi-Synthetic Organism with an Expanded Genetic Alphabet.” Romesberg and his colleagues had created a bacterium incorporating chemical building blocks that, as far as anybody knows, have never been part of any earthly life form.

There had been previous claims to “creating life.” Genome pioneer Craig Venter led a team that manufactured a genome for a germ that causes pneumonia in cows, but their effort used the familiar chemical bases of DNA, known by the letters A, G, C, and T. Romesberg’s group, on the other hand, added two additional letters, dubbed X and Y. When the bacteria successfully replicated X and Y in succeeding generations, Romesberg’s lab could claim to have made the first living thing with an expanded genetic code.

“People would ask what the big deal is, and I said, ‘Imagine you had a language with only four letters’” Romesberg says. “‘It would be clumsy and would really curtail the kinds of stories you could tell. So imagine two more letters. Now you could write more interesting stories.’”

New drugs are the most obvious story that could be told with the technology. A startup company called Synthorx, created by Romesberg and the venture fund Avalon Ventures, says it has exploited E. coli bacteria containing X and Y to help manufacture a protein, a step the company’s president and CEO Court Turner describes as “our baby unicorn.” The company didn’t identify the protein, except to say it is “well studied” and that they’d added a new function to it, a way for another drug to attach to the protein at a specific site.
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3D-printed brain tissue

3D-printed brain tissue | The future of medicine and health | Scoop.it
In the latest effort to build an artificial laboratory model of the brain, Australian researchers have developed a novel method for constructing layered biological structures that looks just like cerebral cortex tissue using a handheld 3D printer.

Neuroscientists rarely get the opportunity to study the human brain directly, and so work on cells or tissue slices that have been dissected from animals and grown in Petri dishes. These in vitro methods are useful for studying development and processes such as neurodegeneration and cell-to-cell signalling, but are severely limited in that they do not resemble the complex three-dimensional structure of the brain.

To overcome these obstacles, Rodrigo Lozano of the University of Wollongong in Australia and his colleagues used 3D printing, a manufacturing process that involves creating three-dimensional objects by laying down successive layers of material one on top of the other.

The researchers harvested immature cortical neurons from embryonic mice and encapsulated them within a natural gellan gum polymer hydrogel to create a ‘bio-ink’ cell suspension. As well as being cheap and biocampatible, gellan gum protects the cells it encapsulates, is porous enough for them to exchange nutrients and waste materials with the surrounding growth medium, and solidifies effectively at room temperature.

Lozano and his colleagues fabricated the brain tissue with a simple handheld 3D printer, then used scanning electron microscopy to probe the internal structure of the printed structures, and fluorescent antibody staining combined with confocal microscopy to examine the cells within them.
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"Bicycle mechanism" uncovered that is said to drive our brains in and out of sleep

"Bicycle mechanism" uncovered that is said to drive our brains in and out of sleep | The future of medicine and health | Scoop.it
Jet-setters and night owls will have felt the wrath of an off-kilter body clock, by way of the physical impact it can have on immediate well being. A yearning to understand the underlying reasons for this has been the subject of much scientific interest, and has led to some rather strange products like LED light glasses and glowing pillows. But by studying the biological clock of a humble fruit fly, researchers at Northwestern University are claiming to have uncovered the precise mechanisms that bring us in and out of sleep, with their evidence suggesting these switches date back hundreds of millions of years.

The Northwestern University scientists aren't the first to claim the discovery of a switch for the human biological clock. Earlier this year, a team from Tennessee's Vanderbilt University claimed to have found a way to change an animal's sleep and wake rhythms by stimulating neurons in the brain through a technique known as optogenetics. Last year, scientists from the University of Manchester did so by focusing on an enzyme known as casein kinase 1epsilon (CK1epsilon).

But what has led the Northwestern researchers to their discovery were studies carried out on the brain circadian neurons of an odd mutant fruit fly. They found that heightened sodium channel activity in brain circadian neurons during the daylight was waking up the fly, while high potassium channel activity at night was having the opposite effect.
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How Trigger Warnings Are Hurting Mental Health on Campus

How Trigger Warnings Are Hurting Mental Health on Campus | The future of medicine and health | Scoop.it
Something strange is happening at America’s colleges and universities. A movement is arising, undirected and driven largely by students, to scrub campuses clean of words, ideas, and subjects that might cause discomfort or give offense. Last December, Jeannie Suk wrote in an online article for The New Yorker about law students asking her fellow professors at Harvard not to teach rape law—or, in one case, even use the word violate (as in “that violates the law”) lest it cause students distress. In February, Laura Kipnis, a professor at Northwestern University, wrote an essay in The Chronicle of Higher Education describing a new campus politics of sexual paranoia—and was then subjected to a long investigation after students who were offended by the article and by a tweet she’d sent filed Title IX complaints against her. In June, a professor protecting himself with a pseudonym wrote an essay for Vox describing how gingerly he now has to teach. “I’m a Liberal Professor, and My Liberal Students Terrify Me,” the headline said. A number of popular comedians, including Chris Rock, have stopped performing on college campuses (see Caitlin Flanagan’s article in this month’s issue). Jerry Seinfeld and Bill Maher have publicly condemned the oversensitivity of college students, saying too many of them can’t take a joke.
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‘Tricorder’-style handheld MouthLab detects patients’ vital signs, rivaling hospital devices | KurzweilAI

‘Tricorder’-style handheld MouthLab detects patients’ vital signs, rivaling hospital devices | KurzweilAI | The future of medicine and health | Scoop.it
Inspired by the Star Trek tricorder, engineers and physicians at the Johns Hopkins University School of Medicine have developed a hand-held, battery-powered device called MouthLab that quickly picks up vital signs from a patient’s lips and fingertip.

Updated versions of the prototype could replace the bulky, restrictive monitors now used to display patients’ vital signs in hospitals and actually gather more data than is typically collected during a medical assessment in an ambulance, emergency room, doctor’s office, or patient’s home.

The MouthLab prototype’s measurements of heart rate, blood pressure, temperature, breathing rate, and blood oxygen from 52 volunteers compared well with vital signs measured by standard hospital monitors. The device also takes a basic electrocardiogram. The study was published in the September issue of the Annals of Biomedical Engineering.

Early warning for non-doctors

“We see it as a ‘check-engine’ light for humans,” says the device’s lead engineer, Gene Fridman, Ph.D., an assistant professor of biomedical engineering and of otolaryngology–head and neck surgery at Johns Hopkins. “It can be used by people without special training at home or in the field.” He expects the device may be able to detect early signs of medical emergencies, such as heart attacks, or avoid unnecessary ambulance trips and emergency room visits when a patient’s vital signs are good.
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Digital pen technique can diagnose dementia faster and earlier

Digital pen technique can diagnose dementia faster and earlier | The future of medicine and health | Scoop.it
Noting that most current methods of diagnosing cognitive diseases can only detect impairment after the disorders have taken hold, researchers at MIT have combined digital pen technology and some custom software to develop an objective model for early detection.

The new system, still in its concept stage, is a development on the Clock Drawing Test (CDT) that doctors use to screen for illnesses such as Alzheimer’s and Parkinson’s. In this test patients are asked to draw a clock face showing the time as 10 minutes past 11, and then asked to copy a pre-drawn clock face showing the same time. The results are then examined for signs of problems by a doctor.

Researchers at MIT’s Computer Science and Artificial Intelligence Laboratory (CSAIL) swapped out the ink pen used in current tests for the Anoto Live Pen, a digitizing ballpoint pen that, with the help of a built-in camera, can measure its position on the paper more than 80 times a second. Rather than only relying on the final drawing for subjective analysis by medical practitioners, the pen can pick up on all the patient's hesitations and movements.

Working at Lahey Hospital and Medical Center, the CSAIL researchers helped produce analysis software for the Live Pen version of the test, resulting in what the team calls the digital Clock Drawing Test.
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Obesity drug may be on the horizon after study pinpoints genetic mechanism

Obesity drug may be on the horizon after study pinpoints genetic mechanism | The future of medicine and health | Scoop.it
Nearly half of all Europeans are genetically predisposed to obesity. The condition is a worldwide epidemic affecting more than half a billion people and rising every year in most countries.

Despite this, we know little about the genetic origin of the condition and have no good medical treatment for it other than bariatric surgery. But now a genetic study seems to have cracked the mystery – raising hopes for more efficient treatment.

The global obesity crisis is often blamed on an increasingly sedentary life style and poor eating habits. However, studies have shown that 70-80% of the differences between people in body fat are due to their genes (this is called the heritability).

The first large-scale genetic studies for obesity were launched in 2007, after the initial mapping of the human genome. And one gene, dubbed FTO, made the headlines by popping its head above the other 20,000 genes in the pack. For the past eight years, despite finding nearly 100 other genes linked to obesity, FTO and the area around it have remained the top signals. But scientists around the world have struggled to understand how the gene works and whether it really is behind obesity.
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The verdict is in: feel-good exercise hormone irisin is real

The verdict is in: feel-good exercise hormone irisin is real | The future of medicine and health | Scoop.it
Scientists in the US have found that a feel-good exercise hormone called irisin does indeed exist in humans, putting to bed long-disputed claims that it is a myth.

The research team, led by Bruce Spiegelman from the Dana-Farber Cancer Institute, used mass spectrometry to look for irisin in blood samples of individuals after exercise, finding that these people had released the exercise hormone from their body, which activates fat cells to increase energy turn over.

The research was published today in the journal Cell Metabolism.

“Concentrations are present in sedentary individuals and are significantly increased in individuals undergoing aerobic interval training,” the researchers said in the paper.

“We therefore also confirm our earlier report of irisin being regulated by endurance exercise in humans.”
Working out, feeling good

Irisin received a lot of attention recently because of divisions in the scientific community about whether or not it actually existed.

Irisin’s discovery in 2012 was exciting because scientists had potentially found one reason why exercise keeps us healthy.

When irisin levels were increased in mice, their blood and metabolism improved. Results from human studies are still mixed as to what kinds of exercise raise irisin, but data suggest that high-intensity training protocols are particularly effective.

Professor Mark Febbraio, Head of the Cellular and Molecular Metabolism Laboratory and Head of the Diabetes and Metabolism Division at the Garvan Institute for Medical Research, said that the form of mass spectrometry used in the new study was far more accurate and reliable in measuring irisin.

“Using state-of-the-art technology, the researchers have proven beyond doubt that irisin is real. It settles the argument,“ said Professor Febbraio, who was not involved in the research.

Previous studies using commercially available kits called “ELISA” kits detected the presence of irisin, by recognising an antigen, in samples, which could produce inconsistent results with irisin, he said.
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Remote tribe has antibiotic resistance genes - Futurity

Remote tribe has antibiotic resistance genes - Futurity | The future of medicine and health | Scoop.it
Scientists have found antibiotic resistance genes in the bacterial flora of a South American tribe who have never been exposed to antibiotic drugs.

The findings suggest that bacteria in the human body have had the ability to resist antibiotics since long before such drugs were ever used to treat disease.

The research stems from the 2009 discovery of a tribe of Yanomami Amerindians in a remote mountainous area in southern Venezuela. Largely because the tribe had been isolated from other societies for more than 11,000 years, its members were found to have among the most diverse collections of bacteria recorded in humans.

Within that plethora of bacteria, though, the researchers have identified genes wired to resist antibiotics.
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DebbyBruck's comment, August 22, 10:54 PM
This is such a wonderful article... so telling about the ability of human beings to adapt to challenges in our environments even to the point of being able to resist that which is "anti-life" in an unnatural way. Thank you for sharing!
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“Brainy” mice raise hope of better treatments for cognitive disorders - University of Leeds

“Brainy” mice raise hope of better treatments for cognitive disorders - University of Leeds | The future of medicine and health | Scoop.it
Researchers have created unusually intelligent mice by altering a single gene and as a result the mice were also less likely to feel anxiety or recall fear.

The study, led by the University of Leeds and Mount Sinai Hospital in Toronto, is published today in the journal Neuropsychopharmacology.

It sheds light on the molecular underpinnings of learning and memory and could form the basis for research into new treatments for age-related cognitive decline, cognitive disorders such as Alzheimer’s disease and schizophrenia, and other conditions.

The researchers altered a gene in mice to inhibit the activity of an enzyme called phosphodiesterase-4B (PDE4B), which is present in many organs of the vertebrate body, including the brain.

In behavioural tests, the PDE4B-inhibited mice showed enhanced cognitive abilities.

They tended to learn faster, remember events longer and solve complex exercises better than ordinary mice.

For example, the “brainy mice” showed a better ability than ordinary mice to recognise another mouse that they had been introduced to the day before. They were also quicker at learning the location of a hidden escape platform in a test called the Morris water maze.

However, the PDE4B-inhibited mice also showed less recall of a fearful event after several days than ordinary mice.
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A Surprise Source of Life’s Code | Quanta Magazine

A Surprise Source of Life’s Code |  Quanta Magazine | The future of medicine and health | Scoop.it
Genes, like people, have families — lineages that stretch back through time, all the way to a founding member. That ancestor multiplied and spread, morphing a bit with each new iteration.

For most of the last 40 years, scientists thought that this was the primary way new genes were born — they simply arose from copies of existing genes. The old version went on doing its job, and the new copy became free to evolve novel functions.

Certain genes, however, seem to defy that origin story. They have no known relatives, and they bear no resemblance to any other gene. They’re the molecular equivalent of a mysterious beast discovered in the depths of a remote rainforest, a biological enigma seemingly unrelated to anything else on earth.

The mystery of where these orphan genes came from has puzzled scientists for decades. But in the past few years, a once-heretical explanation has quickly gained momentum — that many of these orphans arose out of so-called junk DNA, or non-coding DNA, the mysterious stretches of DNA between genes. “Genetic function somehow springs into existence,” said David Begun, a biologist at the University of California, Davis.
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FDA ticks off on drug to boost female libido

FDA ticks off on drug to boost female libido | The future of medicine and health | Scoop.it
The first ever prescription pill to boost women's libido has won the approval of US regulators. Addyi got the final nod from the Food and Drug Administration (FDA) on Tuesday after three 24-week trials showed it to offer an increase in sexual desire in premenopausal women, though the agency does warn of side effects that include low blood pressure and fainting.

The company behind the drug, North Carolina-based Sprout Pharmaceuticals, has sought to develop a medication to treat acquired, generalized hypoactive sexual desire disorder (HSDD). This condition is defined by an absence of sexual desire that brings about significant stress and interpersonal difficulties. Studies have shown it affects nearly one in 10 US women.

Addyl (aka flibanserin) is a serotonin 1A receptor agonist and a serotonin 2A receptor antagonist, but the FDA says the precise mechanism that gives it libido-enhancing properties is not currently known. While the drug has been tested in more than 11,000 women, the all important FDA approval follows three 24-week studies involving around 2,400 women with HSDD. The women were aged 36 on average and had suffered from the condition for an average of five years.

In the four weeks leading up to treatment, the women were made to record the number of satisfying sexual events experienced, measure their sexual desire on a scale ranging from 1.2 to 6.0 and measure the stress resulting from HSDD on a scale of zero to four.
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Add lots of microbes to 'me, myself, and I' - Futurity

Add lots of microbes to 'me, myself, and I' - Futurity | The future of medicine and health | Scoop.it
Thinking about plants and animals, including humans, as autonomous individuals is a serious over-simplification, according to new research.

New studies reveal that what we have always thought of as individuals are actually “biomolecular networks” that consist of visible hosts plus millions of invisible microbes that have a significant effect on how the host develops, the diseases it catches, how it behaves, and possibly even its social interactions.

“It’s a case of the whole being greater than the sum of its parts,” says Seth Bordenstein, associate professor of biological sciences at Vanderbilt University, whose work adds to the scientific knowledge suggesting that symbiotic microbes play a fundamental role in virtually all aspects of plant and animal biology, including the origin of new species.

In this case, the parts are the host and its genome plus the thousands of different species of bacteria living in or on the host, along with all their genomes, collectively known as the microbiome.

(The host is something like the tip of the iceberg while the bacteria are like the part of the iceberg that is underwater: Nine out of every 10 cells in plant and animal bodies are bacterial. But bacterial cells are so much smaller than host cells that they have generally gone unnoticed.)
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The brain stores memories relative to time and place of origin

The brain stores memories relative to time and place of origin | The future of medicine and health | Scoop.it
Where and when you form new memories affects where they are stored in the brain's hippocampus, which is the memory center in our brain, researchers at Ohio State University found in a new study. They saw evidence that a particular part of the hippocampus stores memories relative to time over durations of at least a month and space over distances of up to 30 km (18.6 mi).

The researchers enlisted nine female volunteers to wear a smartphone around their neck for a month, with an app that automatically took photos throughout the day. At the end of the month, the participants were hooked up to an fMRI scanner and shown 120 of the approximately 5,400 photos produced by their camera. The researchers measured brain activity while the women tried to remember the event depicted in each picture and answer questions about where, when, or both where and when it occurred.

The farther apart the events were in space and time, the more different the activity patterns in the left anterior hippocampus brain were. The researchers believe this supports an emerging view among neuroscientists that the anterior hippocampus is kind of like an indexing system for autobiographical memories.
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Genetically Engineered Pigs Could Be The Organ Donors Of The Future

Genetically Engineered Pigs Could Be The Organ Donors Of The Future | The future of medicine and health | Scoop.it
According to the US Department of Health and Human Services more and more people are waiting for a lifesaving organ transplant each year. At this time 122,407 people need a new organ for survival. The statistics look pretty grim because on average 22 people die each day while waiting for a transplant and every 10
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Is science pretending both sexes have the same brain? - Futurity

Is science pretending both sexes have the same brain? - Futurity | The future of medicine and health | Scoop.it
Neuroscientists have found a key molecular difference between males and females in how synapses are regulated in the hippocampus. The findings suggest that female and male brains may respond differently to drugs, such as endocannabinoids, that target synaptic pathways.

“The importance of studying sex differences in the brain is about making biology and medicine relevant to everyone, to both men and women,” says Catherine S. Woolley, senior author of the study published in the Journal of Neuroscience and a neurobiology professor at Northwestern University. “It is not about things such as who is better at reading a map or why more men than women choose to enter certain professions.”

A drug called URB-597, which regulates a molecule important in neurotransmitter release, had an effect in females that it did not have in males, the research shows. While the study was done in rats, it has broad implications for humans because this drug and others like it are currently being tested in clinical trials in humans.

“Our study starts to put some specifics on what types of molecular differences there are in male and female brains,” Woolley says.
“We don’t know whether this finding will translate to humans or not,” Woolley says, “but right now people who are investigating endocannabinoids in humans probably are not aware that manipulating these molecules could have different effects in males and females.”
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