DARIEN, IL – A new study suggests that disturbed sleep in adolescents is associated with more symptoms of depression and greater uncertainly about future success. However, perceived support and acceptance from parents and teachers appears to have a protective effect. Results show that disturbed sleep was significantly associated with depressed mood and greater uncertainty about future success. Higher levels of perceived support from parents and from teachers were associated with significantly fewer sleep disruptions and subsequently with fewer symptoms of depression ...

Bethesda, Md. (May 22, 2013)—The omega 3 fatty acids in fish oil have long been thought to protect against cardiovascular disease—so much so that the American Heart Association currently recommends eating at least two servings of fish a week, particularly fatty varieties rich in omega 3s. However, the mechanism behind this protective effect still remains a mystery. In a new study, scientists led by Jason R. Carter of Michigan Technological University shed light on this phenomenon by providing evidence that fish oil might specifically counteract the detrimental effects of ...

DARIEN, IL – A new study provides neurobiological evidence for dysfunction in the neural circuitry underlying emotion regulation in people with insomnia, which may have implications for the risk relationship between insomnia and depression. "Insomnia has been consistently identified as a risk factor for depression," said lead author Peter Franzen, PhD, an assistant professor of psychiatry at the University of Pittsburgh School of Medicine. "Alterations in the brain circuitry underlying emotion regulation may be involved in the pathway for depression, and these results ...

A new, streamlined approach to genetic engineering drastically reduces the time and effort needed to insert new genes into bacteria, the workhorses of biotechnology, scientists are reporting. Published in the journal ACS Synthetic Biology, the method paves the way for more rapid development of designer microbes for drug development, environmental cleanup and other activities. Keith Shearwin and colleagues explain that placing, or integrating, a piece of the genetic material DNA into a bacterium's genome is critical for making designer bacteria. That DNA can give microbes ...

Washington, DC — Activating an enzyme known to play a role in the anti-aging benefits of calorie restriction delays the loss of brain cells and preserves cognitive function in mice, according to a study published in the May 22 issue of The Journal of Neuroscience. The findings could one day guide researchers to discover drug alternatives that slow the progress of age-associated impairments in the brain. Previous studies have shown that reducing calorie consumption extends the lifespan of a variety of species and decreases the brain changes that often accompany ...

ATS 2013, PHILADELPHIA – African-Americans are less likely than whites and women are more likely than men to have had a prior diagnosis of chronic obstructive pulmonary disease (COPD) regardless of their current disease severity, according to a new study. "Race and gender are known to affect the diagnosis and treatment of a number of diseases," said lead author Albert Mamary, MD, Assistant Professor of Medicine at the Temple University School of Medicine in Philadelphia. "In our study of almost 9,000 patients enrolled in the COPDGene study, a cross sectional sample of ...

ATS 2013, PHILADELPHIA ─ A study of veterans at high risk for developing lung cancer shows that low-dose computed tomography (LDCT) can be highly effective in helping clinicians spot tiny lung nodules which, in a small number of patients, may indicate the earliest stages of the disease. LDCT uses less than a quarter of the radiation of a conventional CT scan. Results of the study will be presented at the ATS 2013 International Conference. "Lung cancer is the leading cause of cancer-related death and has a poor survival rate," said Sue Yoon, nurse practitioner ...

SAN FRANCISCO, May 21, 2013 – New data released today at the annual meeting of the American Psychiatric Association show that the NeuroStar TMS Therapy System® induced statistically and clinically meaningful response and remission in patients with Major Depressive Disorder (MDD) during the acute phase of therapy, which were maintained through one year of treatment. At the end of acute treatment, 62 percent of patients achieved symptomatic improvement while 41 percent reported complete remission. At 12 months, 68 percent of patients achieved symptomatic improvement while ...

The contribution of H. pylori and smoking trends to the decline in gastric cancer in US men. Trends in Helicobacter pylori (H. pylori) and smoking explain a significant proportion of the decline of intestinal-type noncardia gastric adenocarcinoma (NCGA) incidence in US men between 1978 and 2008, and are estimated to continue to contribute to further declines between 2008 and 2040. These are the conclusions of a study by Jennifer M. Yeh of the Center for Health Decision Science at the Harvard School of Public Health in Boston and colleagues, published in this week's ...

A novel transcriptome-based classification of colon cancer that improves the current disease stratification based on clinicopathological variables and common DNA markers is presented in a study published in PLOS Medicine this week. (A transcriptome is all RNA produced by a population of cells.) Pr. Pierre Laurent-Puig and colleagues from INSERM in Paris, France used genetic information from a French multicenter study supported by the "Ligue contre le cancer" to identify a standard, reproducible molecular classification based on gene expression analysis of colorectal cancer. ...

Transparent information on the evidence supporting global recommendations on paediatric medicines should be easily accessible in order to help policy makers decides on what drugs to include in their national drug lists, according to international experts from Ghana and the UK writing in this week's PLOS Medicine. The authors, led by David Sinclair from the Liverpool School of Tropical Medicine, report the experiences of the Ghana National Drugs Programme as it reviewed the international evidence base for five priority paediatric medicines* in order to decide whether ...

The integration of mental health interventions into HIV prevention and treatment platforms can reduce the opportunity costs of care and improve treatment outcomes, argues a new Policy Forum article published in this week's PLOS Medicine. Syvia Kaaya from the School of Medicine at the Muhimbili University of Health and Allied Sciences in Dar es Salaam, Tanzania and her international colleagues say that effective interventions exist for recognition and treatment of co-morbid mental disorders and can be implemented successfully by trained non- specialized providers in HIV ...

Researchers at University of Cincinnati have developed and tested a solar-powered nano filter that is able to remove harmful carcinogens and antibiotics from water sources – lakes and rivers – at a significantly higher rate than the currently used filtering technology made of activated carbon. They report their results today at the 113th General Meeting of the American Society for Microbiology. Vikram Kapoor, environmental engineering doctoral student, and David Wendell, assistant professor of environmental engineering, report on their development and testing of the ...

ATHENS, Ohio (May 21, 2013)—How does the bacterium Shigella—the cause of a deadly diarrheal disease—detect that it's in a human host? Ohio University scientists have found that a biological "RNA thermometer" monitors whether the environment is right for the bacterium to produce the factors it needs to survive within the body, according to a study published May 21 in the journal PLOS ONE. The scientists have been seeking more information about the genetic pathways of Shigella in the hope of finding new treatment options for the disease it causes. Shigellosis kills more ...

ATHENS, Ohio (May 21, 2013)—The mighty T. rex may have thrashed its massive head from side to side to dismember prey, but a new study shows that its smaller cousin Allosaurus was a more dexterous hunter and tugged at prey more like a modern-day falcon. "Apparently one size doesn't fit all when it comes to dinosaur feeding styles," said Ohio University paleontologist Eric Snively, lead author of the new study published today in Palaeontologia Electronica. "Many people think of Allosaurus as a smaller and earlier version of T. rex, but our engineering analyses show that ...

DURHAM, N.C. – A drug commonly used to treat depression and anxiety may improve a stress-related heart condition in people with stable coronary heart disease, according to researchers at Duke Medicine. Compared with those receiving placebo, people who took the antidepressant escitalopram (sold as Lexapro) were more than two-and-a-half times less likely to have mental stress-induced myocardial ischemia (MSIMI), a heart condition brought on by mental stress. The findings, published in the May 22/29, 2013 issue of the Journal of the American Medical Association, add to the ...

Among patients with acute exacerbations of chronic obstructive pulmonary disease (COPD) requiring hospital admission, a 5-day glucocorticoid treatment course was non-inferior (not worse than) to a 14-day course with regard to re-exacerbation during 6 months of follow-up, according to a study published online by JAMA. The study is being released early online to coincide with its presentation at the American Thoracic Society international conference. The authors write that these findings support a shorter-course glucocorticoid treatment regimen, which would reduce glucocorticoid ...

Variation in the gene MUC5B among patients with idiopathic pulmonary fibrosis was associated with improved survival, according to a study published online by JAMA. The study is being released early online to coincide with its presentation at the American Thoracic Society international conference. "Idiopathic pulmonary fibrosis (IPF) is a chronic progressive disease with a median [midpoint] survival of 3 years," according to background information in the article. The prognosis is variable; patients may remain stable for several years, slowly lose lung function, progress ...

Among patients with stable coronary heart disease and mental stress-induced myocardial ischemia (MSIMI), 6 weeks of treatment with the antidepressant escitalopram, compared with placebo, resulted in a lower rate of MSIMI, according to a study in the May 22/29 issue of JAMA. "A robust body of evidence has identified emotional stress as a potential triggering factor in coronary heart disease (CHD) and other cardiovascular events," according to background information in the article. "During the last 3 decades, the association of emotional distress and myocardial ischemic ...

For critically ill patients receiving mechanical ventilation, early tracheostomy (within the first 4 days after admission) was not associated with an improvement in the risk of death within 30 days compared to patients who received tracheostomy placement after 10 days, according to a study in the May 22/29 issue of JAMA. "A tracheostomy is commonly performed when clinicians predict a patient will need prolonged mechanical ventilation," according to background information in the article. The use of this procedure has increased, such that up to one-third of patients requiring ...

Children with obstructive sleep apnea who had a common surgery to remove their adenoids and tonsils showed notable improvements in behavior, quality of life and other symptoms compared to those treated with "watchful waiting" and supportive care. However, there was no difference between both groups in attention and executive functioning, as measured by formal neuropsychological tests. The Childhood Adenotonsillectomy Trial (CHAT) studied 464 children, aged 5 to 9, at seven academic sleep centers. "This was the first randomized clinical trial of surgery for obstructive ...

PHILADELPHIA—The decision to limit life support in patients in the intensive care unit (ICU) appears to be significantly influenced by physician practices and/or the culture of the hospital, suggests new findings from researchers at the Perelman School of Medicine at the University of Pennsylvania presented at the American Thoracic Society International Conference on May 21. A retrospective analysis of over 269,000 ICU patients from the Project IMPACT database revealed a substantial variation in decisions to forgo life-sustaining therapies rates among 153 ICUs in the ...

This news release is available in French. Children who are exposed to secondhand smoke in early childhood are more likely to grow up to physically aggressive and antisocial, regardless of whether they were exposed during pregnancy or their parents have a history of being antisocial, according to Linda Pagani and Caroline Fitzpatrick of the University of Montreal and its affiliated CHU Sainte-Justine hospital. No study to date has controlled for these factors. "Secondhand smoke is in fact more dangerous that inhaled smoke, and 40% of children worldwide are exposed ...

Declines in the biodiversity of pollinating insects and wild plants have slowed in recent years, according to a new study. Researchers led by the University of Leeds and the Naturalis Biodiversity Centre in the Netherlands found evidence of dramatic reductions in the diversity of species in Britain, Belgium and the Netherlands between the 1950s and 1980s. But the picture brightened markedly after 1990, with a slowdown in local and national biodiversity losses among bees, hoverflies and wild plants. Professor Bill Kunin, Professor of Ecology at the University of ...

DURHAM, N.C. -- Having the biggest playlist doesn't make a male songbird the brainiest of the bunch, a new study shows. "For songbirds, singing a lot of songs indicates a bird is smart, but that signal is not necessarily indicative of intelligence for everything," said Duke biologist Steve Nowicki. In a series of problem-solving tests with the birds, he and his colleagues found that the male song sparrows that sang the most songs learned to solve food-finding puzzles more slowly than the birds singing fewer songs. The results are the first to show that a larger song ...