Chapter 5. Hormones and the Brain

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Hannah Devlin Science correspondent “Love looks not with the eyes, but with the mind. And therefore is winged Cupid painted blind,” Shakespeare wrote. Now scientists have pinpointed the specific patterns of brain activity that accompany romance, offering a new explanation for why love sends our judgement haywire. As a relationship takes root, the study found, the brain’s reward circuit goes into overdrive, rapidly increasing the value placed on spending time with one’s love interest. This, at least, was the case in the prairie vole, scientists’ animal model of choice for studying the neuroscience of love. Elizabeth Amadei, who co-led the work at Emory University in Atlanta, said: “As humans, we know the feelings we get when we view images of our romantic partners, but, until now, we haven’t known how the brain’s reward system works to lead to those feelings.” In order to get more direct access to what is happening in the brain, Amadei and colleagues turned to the North American voles, which as a species have almost perfected monogamy. They mate for life, share nest-building duties and have an equal role in raising their young – although, like humans, voles have the occasional “extramarital” fling. Using electrical probes, the scientists recorded directly from the brains of female voles as they encountered a potential partner, mated for the first time and began to show signs of having formed a lifelong bond, indicated by “huddling” behaviour.

Keyword: Sexual Behavior; Hormones & Behavior
Link ID: 23692 - Posted: 06.01.2017

Elle Hunt About 150 years ago, and “almost a lifetime” either side, Charles Darwin was beleaguered by the problem of the peacock’s tail. Just the sight of a feather, he wrote in April 1860, “makes me sick!” The plumage of the male bird represented a hole in his theory of evolution. According to Victorian thinking, beauty was divine creation: God had designed the peacock for his own and humankind’s delight. In, On The Origin of Species, published the previous year, Darwin had challenged the dominant theory of creationism, arguing that man had been made not in God’s image but as a result of evolution, with new species formed over generations in response to their environment. But beauty, and a supposed aesthetic sense in animals (“We must suppose [that peahens] admire [the] peacock’s tail, as much as we do,” he wrote), took Darwin the best part of his life to justify – not least because the theory he eventually landed upon went against the grain of his entire worldview. Sexual selection was of strategic importance to Darwin, says Evelleen Richards, an honorary professor in history and philosophy of science at the University of Sydney: it was a naturalistic account for aesthetic differences between male and female animals of the same species, shoring up his defence of natural selection.

Keyword: Evolution; Sexual Behavior
Link ID: 23642 - Posted: 05.22.2017

By Hannah Furfaro, Children whose fathers are highly intelligent are at a 31 percent higher risk of autism than those whose fathers are of average intelligence, according to unpublished results presented today at the 2017 International Meeting for Autism Research in San Francisco, California. The work supports observations that date back to the 1940s, when Leo Kanner and Hans Asperger noted in separate reports that the fathers of children with autism tended to be highly intelligent and in several cases worked in technical fields. A 2012 study also showed that children from regions in the Netherlands where high-tech jobs are prevalent are more likely to have autism than those who live in other regions. In the new study, lead investigator Renee Gardner, assistant professor at Karolinska Institutet in Stockholm, set out to investigate whether the historical lore has validity. She and her colleagues matched medical records for 309,803 children whose fathers were conscripted into the Swedish military with their father’s scores on the technical portion of the Swedish intelligence quotient (IQ) test. They found a one-third higher risk of autism in children whose fathers’ IQ scores are 111 or higher than in those whose fathers’ scores cluster around 100. The researchers controlled for possible confounding factors such as families’ socioeconomic status and parental age, education level and history of inpatient psychiatric treatment. IQ indicators: They found the opposite relationship between a father’s IQ and his child’s chances of having intellectual disability or attention deficit hyperactivity disorder (ADHD). In particular, children of men with an IQ of 75 or below had a four-and-a-half times higher risk of intellectual disability. The chance of ADHD was 65 percent higher than average for children whose fathers had an IQ in that low range. © 2017 Scientific American

Keyword: Autism; Intelligence
Link ID: 23614 - Posted: 05.15.2017

By Ann Griswold, Much of what Stephen Shore knows about romance he learned in the self-help aisle of a bookstore near the Amherst campus of the University of Massachusetts. In college, Shore, who has autism, began to wonder if women spoke a language he didn’t understand. Maybe that would explain the perplexing behavior of a former massage student with whom he traded shiatsu sessions, who eventually told him she had been hoping for more than a back rub. Or the woman he met in class one summer, who had assumed she was his girlfriend because they spent most nights cooking, and often shared a bed. Looking back, other people’s signs of romantic interest seemed to almost always get lost in translation. Shore turned to the self-help shelves to learn the unspoken language of love: He pored over chapters on body language, facial expression and nonverbal communication. By the time he met Yi Liu, a woman in his graduate-level music theory class at Boston University, he was better prepared. On a summer day in 1989, as they sat side by side on the beach, Liu leaned over and kissed Shore on the lips. She embraced him, then held his hand as they looked out at the sea. “Based on my research,” he says, “I knew that if a woman hugs you, kisses you and holds your hand all at the same time, she wants to be your girlfriend; you better have an answer right away.” The couple married a year later, on a sunny afternoon in June 1990. Shore was diagnosed with autism around age 3, about a year after he lost his few words and began throwing tantrums. Doctors advised his parents to place him in an institution. Instead, they immersed him in music and movement activities, and imitated his sounds and behavior to help him become aware of himself and others. He began speaking again at 4 and eventually recovered some of the social skills he had lost. © 2017 Scientific American

Keyword: Autism; Sexual Behavior
Link ID: 23586 - Posted: 05.06.2017

By Alice Klein It is pest control without poison. A new type of bait that stops rats from having babies is helping to tackle infestations in several US cities. The bait – known as ContraPest – was approved by the US Environmental Protection Agency last August. It makes rats infertile by triggering early menopause in females and impairing sperm production in males. There are no side effects and the rats eventually die of natural causes. The technique is considered more benign than other control strategies being investigated, such as gene drive, which can be used to spread infertility genes through pest populations. A recent report by the US National Academies of Sciences warned that gene drive could have unforeseen consequences. The first field trial of ContraPest, conducted in the New York City Subway in 2013, halved the resident rat population in three months. Two more trials have now been completed in the US – one at a large-scale farm and one in an urban area – both in East Coast cities. Rat numbers at the farm fell by one-third over three months. In the urban area, population growth was suppressed during the peak breeding season so that the population expanded at only one-third the expected rate. “You’ll never wipe out rats completely – they’re too smart,” says Brandy Pyzyna from SenesTech, the biotechnology company in Arizona that developed the bait. © Copyright Reed Business Information Ltd.

Keyword: Sexual Behavior; Hormones & Behavior
Link ID: 23583 - Posted: 05.06.2017

Mark Zdechlik Health officials in Minnesota have been scrambling to contain a measles outbreak that has sickened primarily Somali-American children in the state. So far health officials have identified 34 cases, still mostly in Hennepin County, and they're worried there will be more. In Minnesota, the vast majority of kids under two get vaccinated against measles. But state health officials say most Somali-American 2-year-olds have not had the vaccine — about six out of ten. As the outbreak spreads, that statistic worries health officials, including Michael Osterholm, who directs the University of Minnesota's Center for Infectious Disease Research and Policy. Understanding The History Behind Communities' Vaccine Fears Shots - Health News Understanding The History Behind Communities' Vaccine Fears "It is a highly concentrated number of unvaccinated people," he says. "It is a potential kind of gas-and-match situation." Measles is a highly contagious respiratory disease that causes a rash and fever. It can be deadly, but the Centers for Disease Control and Prevention says two doses of vaccination are about 97 percent effective in heading off the disease. The Minnesota Department of Health says the outbreak began in Hennepin County, home to Minneapolis and the heart of the nation's Somali-American community. © 2017 npr

Keyword: Autism
Link ID: 23574 - Posted: 05.05.2017

By Abigail Beall You can’t eat, you can’t sleep and all you can think about is your next fix. You may be addicted to love. Intense romance can often come with symptoms resembling addiction – euphoria, craving, dependence, withdrawal and relapse – and brain scans have shown that it can be linked to drug-addiction-like activity in the brain’s reward centres. But the idea that people can be addicted to love is contentious. “It gets complicated because people disagree on the correct theory of addiction, and people especially disagree about what we mean when we use the term ‘love’ ”, says Brian Earp, at the Oxford University Centre for Neuroethics. “I think it is when you realise you do not want to be in love yet cannot avoid it, and it causes bad things, like abuse, that we cross the line into something addiction-like,” says Anders Sandberg, also at the Oxford University Centre for Neuroethics. Now Earp and his team have found evidence that there are in fact two different types of love addiction, after reviewing 64 studies of love and addiction published between 1956 and 2016. They found that people who feel desperately alone when not in a relationship, and try to replace an ex-partner straight away, could have what the team has called a “narrow” form of love addiction.

Keyword: Drug Abuse; Sexual Behavior
Link ID: 23552 - Posted: 04.29.2017

By Lauren Gravitz, Connor was diagnosed with autism early — when he was just 18 months old. His condition was already obvious by then. “He was lining things up, switching lights on and off, on and off,” says his mother, Melissa. He was bright, but he didn’t speak much until age 3, and he was easily frustrated. Once he started school, he couldn’t sit still in class, called out answers without raising his hand and got visibly upset when he couldn’t master a math concept or a handwriting task quickly enough. “One time, he rolled himself up into the carpet like a burrito and wouldn’t come out until I got there,” Melissa recalls. (All families in this story are identified by first name only, to protect their privacy.) Connor was prescribed his first psychiatric drug, methylphenidate (Ritalin), at age 6. That didn’t last long, but when he was 7, his parents tried again. A psychiatrist suggested a low dose of amphetamine and dextroamphetamine (Adderall), a stimulant commonly used to treat attention deficit hyperactivity disorder (ADHD). The drug seemed to improve his time at school: He was able to sit still for longer periods of time and focus on what his teachers were saying. His chicken-scratch handwriting became legible. Then, it became neat. Then perfect. And then it became something Connor began to obsess over. “We were told that these are the gives and takes; if it’s helping him enough to get through school, you have to decide if it’s worth it,” Melissa says. It was worth it — for a while. © 2017 Scientific American

Keyword: Autism
Link ID: 23531 - Posted: 04.25.2017

Paula Span “During the past four weeks, have you been tired? Been exhausted? Had difficulty getting motivated to do anything at all?” These questions — which a substantial chunk of the population probably could answer in the affirmative — appeared on a questionnaire used in a major European study published recently in The New England Journal of Medicine. The authors were researching the effectiveness of a drug that is widely, if controversially, used to treat older adults with subclinical hypothyroidism, better known as a slightly underactive thyroid. So many Americans take that medication — levothyroxine (brand name Synthroid) — that it topped the list of prescription drugs dispensed in the United States in 2015, according to the research firm QuintilesIMS Institute. With 121 million prescriptions annually, levothyroxine outpaced statins, blood pressure meds — and everything else. A Johns Hopkins survey published last year found that more than 15 percent of older Americans were taking it. So you’d think these study results would come as shocking news: The European team reported that in older people with mild hypothyroidism, the drug had no significant effect on symptoms. At all. Instead, the results bolstered what a number of geriatricians and endocrinologists have suspected for years. “It’s a strong signal that this is an overused medication,” said Dr. Juan Brito, an endocrinologist at the Mayo Clinic. “Some people really need this medicine, but not the vast majority of people who are taking it.” © 2017 The New York Times Company

Keyword: Hormones & Behavior
Link ID: 23522 - Posted: 04.22.2017

Carl Zimmer The oldfield mouse doesn’t seem extraordinary. With soulful black eyes and tiny teacup ears, the rodent lives a humdrum life scurrying about meadows and beaches in the Southeast. But field biologists have long known that when it comes to sex and family life, this mouse is remarkable: Peromyscus polionotus is monogamous — an exception among mammals — and a solicitous parent. Fathers and mothers will dig burrows together and build elaborate nests when pups are on the way; after they’re born, the father will help tend to the pups, retrieving them when they fall out of the nest, licking them, and huddling to keep them warm. In a pioneering study published on Wednesday in the journal Nature, researchers at Harvard University identified a genetic basis for this distinctive behavior. It is the first time that scientists have linked DNA to variations in parenting habits among mammals. Dieter Lukas, an evolutionary biologist at the University of Cambridge who was not involved in the research, hailed the study as a sophisticated tour de force, saying that uncovering these links “is like designing a tool to follow individual threads through a large colorful tapestry.” The findings may one day help scientists make sense of how human couples bond and care for their children. Mammals share many of the genes governing the production of hormones and neurotransmitters in the brain. Variations in how they function may explain why most species are promiscuous, why a few are monogamous — and why some, like humans, are somewhere in between. “We can go from the bottom up and build our knowledge base, and then ask questions about human biology,” said Gene E. Robinson, a biologist at the University of Illinois who was not involved in the new work. © 2017 The New York Times Company

Keyword: Sexual Behavior; Genes & Behavior
Link ID: 23516 - Posted: 04.20.2017

Laura Sanders Soon after systems biologist Juergen Hahn published a paper describing a way to predict whether a child has autism from a blood sample, the notes from parents began arriving. “I have a bunch of parents writing me now who want to test their kids,” says Hahn, of Rensselaer Polytechnic Institute in Troy, N.Y. “I can’t do that.” That’s because despite their promise, his group’s results, reported March 16 in PLOS Computational Biology, are preliminary — nowhere close to a debut in a clinical setting. The test will need to be confirmed and repeated in different children before it can be used to help diagnose autism. Still, the work of Hahn and colleagues, along with other recent papers, illustrates how the hunt for a concrete biological signature of autism, a biomarker, is gaining speed. Currently, pediatricians, child psychologists and therapists rely on behavioral observations and questionnaires, measures with limitations. Barring genetic tests for a handful of rare mutations, there are no blood draws, brain scans or other biological tests that can reveal whether a child has — or will get — autism. Objective tests would be incredibly useful, helping provide an early diagnosis that could lead to therapy in the first year of life, when the brain is the most malleable. A reliable biomarker might also help distinguish various types of autism, divisions that could reveal who would benefit from certain therapies. And some biomarkers may reveal a deeper understanding of how the brain normally develops. |© Society for Science & the Public 2000 - 2017

Keyword: Autism; Brain imaging
Link ID: 23479 - Posted: 04.11.2017

By JENNIFER MALIA In “Meet Julia,” an episode of “Sesame Street” that will air April 10 on PBS and HBO, Elmo and Abby Cadabby introduce Big Bird to Julia, a new muppet character with autism. Big Bird says, “Hi, Julia, I’m Big Bird. Nice to meet you.” But Julia continues painting without making eye contact or responding to Big Bird. On “60 Minutes,” Big Bird tells Lesley Stahl, who was on the set when “Sesame Street” was filming the new Muppet’s debut, that he thought Julia didn’t like him at first. Elmo then explains, “Julia has autism so sometimes it takes her a little longer to do things.” I can relate. When my daughter started preschool, she would run laps around the perimeter of the fenced-in playground without responding to kids who said “hi” as she passed by. One day, she stopped in her tracks to pick up a jacket that had fallen to the ground, handed it to a girl without saying a word, and continued running. The kids on the playground probably assumed she didn’t like them — just as Big Bird did. Within the past year, my daughter, who is now 3, my 2-year-old son and I were all given diagnoses of autism spectrum disorder because of our repetitive behaviors, obsessive interests, sensory issues and difficulty with social interactions and pragmatic communication skills. My kids are on the mild to moderate part of the spectrum, having language, but not intellectual, impairments. (I also have a 4-year-old daughter who does not have a diagnosis.) Julia gives me hope that my children and their peers will grow up in a world where autism is normalized, rather than stigmatized. Preschoolers are the primary audience for “Sesame Street,” an educational television program where young children watching Julia’s interactions with her peers can learn by example to support autism acceptance. Since one in 68 American children have an autism diagnosis, wider understanding of the condition is valuable for them as well as for their peers. © 2017 The New York Times Company

Keyword: Autism
Link ID: 23462 - Posted: 04.07.2017

By RONI CARYN RABIN Television ads for “low T” have sparked a rise in the use of testosterone gels, patches and injections by older men in recent years, according to a new report. But anyone hoping that a dose of testosterone will provide an easy antidote for sagging muscles, flagging energy and a retiring sex drive may find the results of recent government studies of the sex hormone sobering. The latest clinical trials, published over the past year, are the first rigorous ones to assess the potential beneficial effects of testosterone treatment for older men with abnormally low levels of the hormone. Scientists followed 790 men age 65 and older who had blood testosterone levels below 275 nanograms per deciliter of blood, well below the average for healthy young men and lower than would be expected with normal aging. The men also had symptoms reflecting their low hormone levels, like loss of sex drive. Half the participants were treated with testosterone gel, and half were given a placebo gel. The studies reported mixed results, finding that over the yearlong study period, testosterone therapy corrected anemia, or low levels of red blood cells, which can cause fatigue, and increased bone density. But a study to see if testosterone improved memory or cognitive function found no effects. Meanwhile, a red flag warning of possible risks to the heart emerged from the studies: Imaging tests found a greater buildup of noncalcified plaque in the coronary arteries of men treated with testosterone for a year, an indicator of cardiac risk, compared with those who were given a placebo gel. The findings of plaque were not a complete surprise; many reports have tied testosterone use to an increase in heart attacks, and the Food and Drug Administration already requires testosterone products to carry warnings of an increased risk of heart attacks and stroke (men at high risk of cardiovascular disease were not allowed to participate in the latest trials). But observational studies, which are weaker, have yielded mixed results over all, with one study published last month finding that men taking testosterone actually had fewer heart problems. © 2017 The New York Times Company

Keyword: Hormones & Behavior; Sexual Behavior
Link ID: 23413 - Posted: 03.28.2017

By Daisy Yuhas, Spectrum on March 22, 2017 In children with a deletion on chromosome 22, having autism does not boost the risk of developing schizophrenia later in life, according to a new study1. The children in the study have 22q11.2 deletion syndrome, which is linked to a 25-fold increase in the risk of developing a psychotic condition such as schizophrenia. A deletion in the region is also associated with an increased risk of autism. Some researchers have suggested that the relatively high autism prevalence in this population is the result of misdiagnoses of early signs of schizophrenia. The new findings, published 21 January in Schizophrenia Research, support an alternate theory: Autism and schizophrenia are independent outcomes of the same genetic syndrome. If there is a relationship between the two conditions, “that can only be a very small, probably negligible effect,” says lead investigator Jacob Vorstman, assistant professor of child psychiatry and genetics at the University Medical Center Utrecht in the Netherlands. The new findings could help guide clinical care, says Opal Ousley, assistant professor of psychiatry at the Emory Autism Center in Atlanta. If prenatal testing picks up the 22q11.2 deletion, for instance, clinicians could discuss the risk of both autism and schizophrenia with parents. © 2017 Scientific American

Keyword: Autism; Schizophrenia
Link ID: 23393 - Posted: 03.23.2017

By Jill Serjeant NEW YORK (Reuters) - Long-running children's television show "Sesame Street" is welcoming a new kid to the block - a Muppet with autism called Julia. A redhead who loves to sing and remembers the words to lots of songs, Julia will debut on the show for preschoolers on April 10 after a five-year outreach effort to families and experts on autism, Sesame Workshop said on Monday. "For years, families of children with autism have asked us to address the issue," Dr. Jeanette Betancourt, senior vice president of U.S. social impact at the nonprofit Sesame Workshop, said in a statement. One in 68 American children is currently diagnosed with autism, according to the Centers for Disease Control and Prevention, an increase of some 119 percent since 2000. Autism is a developmental disorder present from early childhood, characterized by difficulty in communicating and forming relationships with other people and in using language and abstract concepts Stacey Gordon, the puppeteer who will perform the role of Julia, and Christine Ferraro who wrote her part, both have family members who are on the autism spectrum. "It's important for kids without autism to see what autism can look like," Gordon told the CBS show "60 Minutes" in a preview on Sunday. "Had my son's friends been exposed to his behaviors through something that they had seen on TV before they experienced them in the classroom, they might not have been frightened. They might not have been worried when he cried. They would have known that he plays in a different way and that that's okay," she added. © 2017 Scientific American

Keyword: Autism
Link ID: 23387 - Posted: 03.22.2017

By Abby Olena Researchers have shown that a hormone secreted by bone, called lipocalin 2 (LCN2), suppresses appetite in mice. The results, published today (March 8) in Nature, suggest that LCN2 crosses the rodents’ blood-brain barrier and binds a receptor in the hypothalamus. The team also found a link between body weight and LCN2 levels in people with type 2 diabetes. The authors “have identified a protein that’s secreted from bone that has a pretty significant impact on feeding behavior,” Lora Heisler of the University of Aberdeen in Scotland, who did not participate in the work, told The Scientist. “And the fact that they found that some supporting evidence in humans is really exciting.” “We have found a new role for bone as an endocrine organ, and that is its ability to regulate appetite,” said study coauthor Stavroula Kousteni of Columbia University in New York City. Scientists had previously identified LCN2 as a protein expressed in fat cells, but Kousteni and colleagues showed that it is enriched 10-fold in osteoblasts. When they generated mice without LCN2 in their osteoblasts, levels of the circulating hormone dropped 67 percent. These mice ate more than control animals and showed increases in fat mass and body weight. When the authors injected LCN2 into wild-type or obese mice, the rodents ate less food. The treated animals showed decreases in body weight, fat mass, and weight gain. LCN2 injections also led to increases in insulin levels and glucose tolerance, the scientists showed. © 1986-2017 The Scientist

Keyword: Obesity; Hormones & Behavior
Link ID: 23340 - Posted: 03.10.2017

By Bahar Gholipour, Spectrum An analysis of whole-genome sequences from more than 5,000 people has unearthed 18 new candidate genes for autism. The study, the largest yet of its kind, was published this week in Nature Neuroscience. The new work identified 61 genes associated with autism, 43 of which turned up in previous studies. An independent study published last month looked at several autism genes and made a strong case for three of the new genes2. Most of the new candidates play roles in cellular processes already implicated in autism and intellectual disability. They also point to possible new treatments. “Eighty percent of them involve common biological pathways that have potential targets for future medicines,” says study investigator Ryan Yuen, research associate at the Hospital for Sick Children in Toronto, Canada. The study is the largest analysis of whole genomes from people with autism and their family members to date. Participants are enrolled in MSSNG, an effort funded by Google and the nonprofit group Autism Speaks to analyze sequences from 10,000 people. Other studies typically focus on the coding regions of the genome, called theexomes. Most of the mutations identified in the new work land in genes, but some affect noncoding regions of the genome. Understanding the role of these noncoding mutations is a “challenging task,” says Ivan Iossifov, associate professor at Cold Spring Harbor Laboratory in New York, who was not involved in the study. “The more data that’s available, the better,” he says. “This paper provides a very useful resource for the community to further study.” © 2017 Scientific American,

Keyword: Autism; Genes & Behavior
Link ID: 23325 - Posted: 03.07.2017

Nicola Davis The mystery of why sheep get horny in the winter might have been solved, according to new research. Scientists say they have uncovered the key to the mechanism by which changes in the length of the day prompt certain animals to begin breeding, trigger the growth of horns and even change the thickness of their coat. The findings, the team add, could help farmers tinker with the timing of the lambing season. “Now we know what that link is we can start to understand how it can be controlled,” said David Bates, professor of oncology at the University of Nottingham and co-author of the research. It has long been known that changes in animals’ fertility over the seasons is linked to melatonin – a hormone released at night from the pineal gland in the brain. This hormone acts on another gland, the pituitary, affecting the levels of various sex hormones it produces. With the onset of fertility in sheep linked to longer periods of melatonin production, winter is the season for ovine Casanovas. But there is a puzzle. The region of the pituitary gland that detects melatonin is separate to the region that produces sex hormones. As a result, scientists had been baffled as to how melatonin ends up affecting the onset of fertility. “No-one has been able to find what the link is,” said Bates. Now Bates and colleagues from the University of Bristol say they have the answer. Writing in the journal PNAS, the team reveal the missing link is a protein, known as vascular endothelial growth factor, which is made in the region of the pituitary gland that detects melatonin. © 2017 Guardian News and Media Limited

Keyword: Sexual Behavior; Hormones & Behavior
Link ID: 23322 - Posted: 03.07.2017

By Jessica Wright, Spectrum The prevalence of autism in the United States has risen steadily since researchers first began tracking it in 2000. The rise in the rate has sparked fears of an autism ‘epidemic.’ But experts say the bulk of the increase stems from a growing awareness of autism and changes to the condition’s diagnostic criteria. Here’s how researchers track autism’s prevalence and explain its apparent rise. How do clinicians diagnose autism? There is no blood test, brain scan or any other objective test that can diagnose autism—although researchers are actively trying to develop such tests. Clinicians rely on observations of a person’s behavior to diagnose the condition. In the U.S., the criteria for diagnosing autism are laid out in the “Diagnostic and Statistical Manual of Mental Disorders” (DSM). The criteria are problems with social communication and interactions, and restricted interests or repetitive behaviors. Both of these ‘core’ features must be present in early development. What is the prevalence of autism in the U.S.? The Centers for Disease Control and Prevention (CDC) estimates that 1 in 68children in the U.S. have autism. The prevalence is 1 in 42 for boys and 1 in 189 for girls. These rates yield a gender ratio of about five boys for every girl. © 2017 Scientific American,

Keyword: Autism
Link ID: 23305 - Posted: 03.03.2017

By Melissa Pandika Groundbreaking research suggests that a treatment for autism may come in the form of a probiotic. Stress can send your stomach into a painful tailspin, causing cramps, spasms and grumbling. But trouble in the gut can also affect the brain. This two-way relationship may be an unlikely key to solving one of medicine’s most pressing — and perplexing — mysteries: autism. Nearly 60 years after the disorder was first identified, the number of cases has surged, and the United Nations estimates that up to 70 million people worldwide fall on the autism spectrum. Yet there is no known cause or cure. But scientists have found promising clues in the gut. Research has revealed striking differences in the trillions of bacteria — a.k.a., the microbiome — in the intestines of children with and without autism. But the gut bacteria in individuals with autism aren’t just different. Researchers at the California Institute of Technology have shown for the first time that they may actually contribute to the disorder. They reported in the journal Cell in December 2013 that an experimental probiotic therapy alleviated autism-like behaviors in mice and are already planning a clinical trial. Today autism is treated primarily through behavioral therapy. But the new study suggests that treatment may one day come in the form of a probiotic — live, beneficial bacteria like those found in yogurt. “If you block the gastrointestinal problem, you can treat the behavioral symptoms,” Paul Patterson, a professor of biology at Caltech who co-authored the study told SFARI.org. University of Colorado Boulder professor Rob Knight hailed the finding as “groundbreaking” in a commentary in Cell. © OZY 2017 Terms & Conditions

Keyword: Autism; Obesity
Link ID: 23289 - Posted: 02.28.2017