Evolutionary theory says mutations are blind and occur randomly. But in the phenomenon of adaptive mutation, cells can peek under the blindfold, increasing their mutation rate in response to stress. Scientists at Winship Cancer Institute, Emory University have observed that an apparent "back channel" for genetic information called retromutagenesis can encourage adaptive mutation to take place in bacteria. The results are scheduled for publication in PLOS Genetics on Tuesday, August 25. "This mechanism may explain how bacteria develop resistance to some types of antibiotics ...

Tropical Cyclone Atsani appeared to look more like a frontal system in infrared imagery from NASA's Aqua satellite.Early on August 26, the Joint Typhoon Warning Center issued their final bulletin on the system as it was transitioning into an extra-tropical cyclone, The Atmospheric Infrared Sounder or AIRS instrument that also flies aboard Aqua captured infrared data on the storm on August 25 at 14:47 UTC (10:47 a.m. EDT). Cloud top temperatures in thunderstorms northeast of the center were colder than -63F/-52C, indicating high, strong thunderstorms with the potential ...

Bats are natural reservoirs of several important emerging viruses, and because cross-species transmission appears to be quite common among bats, it's important to study bats in a community context rather than concentrating on individual species. Researchers have now used such an approach to identify characteristics of cross-species virus transmission in bats and rodents, another important viral host. The investigators uncovered evidence to suggest that viruses pass more easily between bat species than between rodent species, and they found that characteristics unique ...

In a new review of all relevant medical research on breastfeeding practices, infants 0 to 5 months of age who were predominantly, partially, or not breastfed had 1.5-, 4.8-, and 14.4-times higher risks of dying, respectively, compared with exclusively breastfed infants. Also, children aged 6 to 23 months who were not breastfed had about a 2-times higher risk of dying than children who were continued on breastfeeding. "The findings underscore the importance of optimal breastfeeding practices during infancy and early childhood," said Dr. M. Jeeva Sankar, lead author of ...

(Boston)--Twenty-five percent of men currently taking Finasteride or Dutasteride, popularly known as Proscar and Avodart, for the treatment of benign prostate enlargement (BPH), appear not to benefit from taking these medications. Those prescribed Propecia or Avodart for male pattern hair loss (known as alopecia) are also at risk for adverse events elicited by these drugs. These findings are part of an international, collaborative review currently online in the journal Endocrine Reviews and Metabolic Disorders. Led by Abdulmaged Traish, PhD, professor of biochemistry ...

In early August, biologist Peter Ward returned from the South Pacific with news that he encountered an old friend, one he hadn't seen in over three decades. The University of Washington professor had seen what he considers one of the world's rarest animals, a remote encounter that may become even more infrequent if illegal fishing practices continue. The creature in question is Allonautilus scrobiculatus, a species of nautilus that Ward and a colleague had previously discovered off of Ndrova Island in Papua New Guinea. Nautiluses are small, distant cousins of squid and ...

RIVERSIDE, Calif. - Barley, a widely grown cereal grain commonly used to make beer and other alcoholic beverages, possesses a large and highly repetitive genome that is difficult to fully sequence. Now a team led by scientists at the University of California, Riverside has reached a new milestone in its work, begun in 2000, on sequencing the barley genome. The researchers have sequenced large portions of the genome that together contain nearly two-thirds of all barley genes. The new information, published in The Plant Journal, will not only expand geneticists' knowledge ...

A recent randomized trial conducted by researchers at Abbott Northwestern Hospital, part of Allina Health, found that inpatient palliative care (PC) visits were associated with improved quality of life and symptom burden for patients with heart failure (HF). Because of these results, Abbott Northwestern conducted a new study, "A Description of Inpatient Palliative Care Actions for Patients with Acute Heart Failure," published June 30 by the American Journal of Hospice and Palliative Medicine. The study aimed to identify and describe what actions PC providers took to ...

BOSTON - A new study led by researchers at Boston Medical Center (BMC) indicates that variations in opioid receptor genes are associated with more severe neonatal abstinence syndrome (NAS) in newborn babies. The findings, published online in Drug & Alcohol Dependence, could help lead to the development of individualized treatment plans tailored to each infants' risk of requiring medication to curb their NAS symptoms, which could help improve these patients' outcomes and reduce how long some stay in the hospital. NAS is present in newborn babies who have been exposed ...

Jaclyn Tabor and Jessica Calarco tap a novel data source to track changing attitudes toward parenting during the 20th and early 21st centuries: cartoons in the New Yorker magazine. "We find that portrayals of children and child-rearing are both more varied and more fluctuating than existing research would suggest," said Tabor, an Indiana University Bloomington doctoral student in sociology. "Contemporary cartoons celebrate children but also recognize the significant challenges children create for parents. Cartoons from the 1920s and 1930s -- when rates of childlessness ...

Less than a month before Congress votes on whether to reauthorize a controversial program mandating healthier school lunches, a new study confirms the suspicions of school officials - many students are putting the fruits and vegetables they're now required to take straight into the trash, consuming fewer than they did before the law took effect. The new study, published online in Public Health Reports on Aug. 25, is the first to use digital imaging to capture students' lunch trays before and after they exited the lunch line. It is also one of the first to compare fruit ...

People of all ages recently lined up to do some fishing at the Museum of Science in Boston. And oddly, the fish they hoped to hook were not good ones. Museum goers were invited to play "Fish Police!!" is a video game that challenged players to rid a river of its bad fish, while sparing its good ones. The catch? All the fish looked exactly alike, and could be told apart only by the way a fish puffed in size: a bad fish puffed just a little faster. After all, it was nervous that it would be caught. The game's premise may sound a little fishy, but it has helped a team ...

Amsterdam, NL, August 25, 2015 - Patients with relapsing-remitting multiple sclerosis (RR-MS), the most common form of the disease, often have deficits in two neuropsychological functions, autobiographical memory (AM) and episodic future thinking (EFT), which impact quality of life. In a new study published in Restorative Neurology and Neuroscience, researchers report that training RR-MS patients in mental visual imagery (MVI) can improve AM/EFT functioning. AM facilitates the ability to remember personal detailed events within a specific location and timeframe. EFT enables ...

Murderers who kill intimate partners and family members have a similar profile One-third of all women murdered in U.S. are killed by male partners Wives and family members wrongly think 'my husband or son would never hurt me' CHICAGO --- Murderers who kill intimate partners and family members have a significantly different psychological and forensic profile from murderers who kill people they don't know, reports a new Northwestern Medicine study that examined the demographics, psychiatric history and neuropsychology of these individuals. The new knowledge about ...

HOUSTON, August 25, 2015 - Pancreatic cancer is extremely deadly and often has a poor prognosis. Ranked as the fourth deadliest cancer in the U.S. and poised to move up within the next few years, pancreatic cancer is very difficult to detect in its early stages. Seldom diagnosed early and typically spreading rapidly, the disease has no effective treatment once it advances. University of Houston researchers are on a mission to develop drugs that will allow physicians to prolong patient survival and, possibly, even eradicate this deadliest of cancers. "Our research ...

Two studies in the August 25 issue of JAMA examine the effect of physical activity and nutrient supplementation on cognitive function. In one study, Kaycee M. Sink, M.D., M.A.S., of the Wake Forest School of Medicine, Winston-Salem, N.C., and colleagues evaluated whether a 24-month physical activity program would result in better cognitive function, lower risk of mild cognitive impairment (MCI) or dementia, or both, compared with a health education program. Epidemiological evidence suggests that physical activity is associated with lower rates of cognitive decline. ...

Among U.S. veterans who returned from Afghanistan and Iraq, being separated from the military for misconduct was associated with an increased risk of homelessness, according to a study in the August 25 issue of JAMA. Adi V. Gundlapalli, M.D., Ph.D., M.S., of the VA Salt Lake City Health Care System, Salt Lake City, and colleagues analyzed Veterans Health Administration (VHA) data from U.S. active-duty military service members who were separated (end date of last deployment) from the military between October 2001 and December 2011, deployed in Afghanistan or Iraq, and ...

Among children with in-hospital cardiac arrest with an initial nonshockable heart rhythm who received epinephrine (adrenaline), delay in administration of epinephrine was associated with a decreased chance of 24-hour survival and survival to hospital discharge, according to a study in the August 25 issue of JAMA. Approximately 16,000 children in the United States have a cardiac arrest each year, predominantly in a hospital setting. Epinephrine is recommended by both the American Heart Association and the European Resuscitation Council in pediatric cardiac arrest. Delay ...

In preliminary research, the detection of persistent leukemia-associated genetic mutations in at least 5 percent of bone marrow cells in day 30 remission samples among adult patients with acute myeloid leukemia was associated with an increased risk of relapse and reduced overall survival, according to a study in the August 25 issue of JAMA. Approximately 20 percent of adult patients with acute myeloid leukemia (AML) fail to achieve remission with initial induction chemotherapy, and approximately 50 percent ultimately experience relapse after achieving complete remission. ...

For patients with an often-deadly form of leukemia, new research suggests that lingering cancer-related mutations - detected after initial treatment with chemotherapy - are associated with an increased risk of relapse and poor survival. Using genetic profiling to study bone marrow samples from patients with acute myeloid leukemia (AML), researchers found that those whose cells still carried mutations 30 days after the initiation of chemotherapy were about three times more likely to relapse and die than patients whose bone marrow was cleared of these mutations. The study, ...

Several Palaeozoic mass extinction events during the Ordovician and Silurian periods (ca. 485 to 420 to million years ago) shaped the evolution of life on our planet. Although some of these short-lived, periodic events were responsible for eradication of up to 85% of marine species, the exact kill-mechanism responsible for these crises remains poorly understood. An international team led by Thijs Vandenbroucke (researcher at the French CNRS and invited professor at UGent) and Poul Emsbo (US Geological Survey) initiated a study to investigate a little known association ...

PITTSBURGH--The historic outbreak of Ebola virus disease in West Africa that began in March 2014 and has killed more than 11,000 people since, has raised new questions about the resilience of the virus and tested scientists' understanding of how to contain it. The latest discovery by a group of microbial risk-assessment and virology researchers suggests that the procedures for disposal of Ebola-contaminated liquid waste might underestimate the virus' ability to survive in wastewater. Current epidemic response procedures from both the World Health Organization and the ...

NASA's Aqua satellite passed over Hurricane Loke as it continued moving north in the Central Pacific early on August 25. At 01:10 UTC on August 25, 2015 (9:10 p.m. EDT/Aug. 24) the Moderate Resolution Imaging Spectroradiometer or MODIS instrument aboard NASA's Aqua satellite captured an infrared image of Hurricane Loke. The image showed the thunderstorms wrapping around the northern quadrant of the storm from east to west of the storm's center. Despite attaining hurricane status, however, there was no visible eye although microwave data taken earlier indicated an eye. ...

LAWRENCE -- To look tougher, a weakling might shave their head and don a black leather jacket, combat boots and a scowl that tells the world, "don't mess with me." But this kind of masquerade isn't limited to people. Researchers recently have revealed a timid South American woodpecker that evolved to assume the appearance of larger, tougher birds. Visual mimicry lets the Helmeted Woodpecker (Dryocopus galeatus) live on the threatened Atlantic forest turf of two bigger birds -- the Lineated Dryocopus lineatus and Robust (Campephilus robustus) woodpeckers -- reducing ...

August 24, 2015 - In the western foothills and mountain rangelands of the U.S., wild larkspurs (Delphinium spp.) are a major cause of cattle losses. For the most part, grazing cattle can self-regulate consumption of larkspurs and avoid toxicity problems. However, when cattle eat too much, too quickly, or they eat low amounts continuously, toxicity can occur. Symptoms of toxicity include muscle weakness. Cattle also can become non-ambulatory and die. In a recent study published in the Journal of Animal Science, researchers with the USDA-ARS Poisonous Plant Research ...