Teenage boys who show a combination of depressive symptoms and elevated levels of the 'stress hormone' cortisol are up to fourteen times more likely to develop major depression than those who show neither trait, according to research funded by the Wellcome Trust. In a study published today in the Proceedings of the National Academy of Sciences, researchers from the University of Cambridge have identified the first biomarker – a biological signpost – for major, or clinical, depression. They argue that this could help identify those boys in particular at greatest risk ...

A heartier appetite is linked to more rapid infant growth and to genetic predisposition to obesity, according to two papers published in JAMA Pediatrics today (Monday). The studies investigated how weight gain is linked to two key aspects of appetite, namely lower satiety responsiveness (a reduced urge to eat in response to internal 'fullness' signals) and higher food responsiveness (an increased urge to eat in response to the sight or smell of nice food). The first paper reveals that infants with a heartier appetite grew more rapidly up to age 15 months, potentially ...

Archaeological data indicate modern herring management needs to take a longer look into the past to manage fisheries for the future says a new study involving Simon Fraser University researchers. That is one of the key findings in the study, just published online in Proceedings of the National Academy of Sciences (PNAS). SFU researchers Iain McKechnie, Dana Lepofsky and Ken Lertzman, and scientists in Ontario, Alberta and the United States are its co-authors. The study is one of many initiatives of the SFU-based Herring School, a group of researchers that investigates ...

A series of studies are published in a special supplement that presents results of the Maternal and Newborn Health in Ethiopia Partnership—a three-year pilot program funded by the Bill & Melinda Gates Foundation with the goal of improving the health of Ethiopian mothers and their newborns. This special issue of the Journal of Midwifery & Women's Health is published by Wiley on behalf of the American College of Nurse-Midwives. High mortality rates for pregnant women and newborns continue to be a major health concern in Africa, with Ethiopia being one of the most affected ...

Researchers from Warwick Medical School have discovered the key role of a protein in shutting down endocytosis during mitosis, answering a question that has evaded scientists for half a century. The study, published today in the journal eLife, is the first to outline the role of actin, a protein, in shutting down clathrin-dependent endocytosis during mitosis. Endocytosis is the process by which cells absorb molecules that are too large to pass through the plasma membrane, such as proteins. Clathrin-dependent endocytosis is the most common route for this. Clathrin, a ...

With a little practice on a computer or iPad—25 minutes a day, 4 days a week, for 2 months—our brains can learn to see better, according to a study of University of California, Riverside baseball players reported in the Cell Press journal Current Biology on February 17. The new evidence also shows that a visual training program can sometimes make the difference between winning and losing. The study is the first, as far as the researchers know, to show that perceptual learning can produce improvements in vision in normally seeing individuals. "The demonstration that ...

The dramatic images of natural disasters in recent years, including hurricanes Katrina and Sandy and the Tohoku, Japan, earthquake and tsunami, show that nature, not the people preparing for hazards, often wins the high-stakes game of chance. "We're playing a high-stakes game against nature without thinking about what we're doing," geophysicist Seth Stein of Northwestern University said. "We're mostly winging it instead of carefully thinking through the costs and benefits of different strategies. Sometimes we overprepare, and sometimes we underprepare." Stein will ...

Emergence of new microbes While many endemic infectious diseases of humans have been largely contained, new microbes continue to emerge to threaten human and animal health. Such emerging infectious diseases are not confined to humans and their livestock but extend to wildlife ecosystems; the finely-tuned dynamic balance of which is destabilised by human interventions. The changes in the scale and manner of livestock production and marketing, the increase of global travel and trade including the trade in domestic livestock as well as the pet animal trade, the increasing ...

Neurotensin conjugate provides pain relief in animal models The small peptide neurotensin is a potent regulator of dopamine signaling and can provide dramatic pain relief; however, the blood brain barrier provides a substantial challenge toward clinical use of neurotensin for analgesia. In this issue of the Journal of Clinical Investigation, Philippe Sarret and colleagues at Université de Sherbrooke generated a conjugate of neurotensin with a peptide able to cross the blood brain barrier and evaluated the analgesic effects of this molecule in animal models of pain. The ...

WA, Seattle (February 17, 2014) – A new study describes the complexity of the new T cell repertoire following immune-depleting therapy to treat multiple sclerosis, improving our understanding of immune tolerance and clinical outcomes. In the Immune Tolerance Network's (ITN) HALT-MS study, 24 patients with relapsing, remitting multiple sclerosis received high-dose immunosuppression followed by a transplant of their own stem cells, called an autologous stem cell transplant, to potentially reprogram the immune system so that it stops attacking the brain and spinal cord. ...

EAST LANSING, Mich. — Grasping the concept of climate change and its impact on the environment can be difficult. Establishing common ground and using models, however, can break down barriers and present the concept in an easily understood manner. In a presentation at this year's meeting of the American Association for the Advancement of Science, Michigan State University systems ecologist and modeler Laura Schmitt-Olabisi shows how system dynamics models effectively communicate the challenges and implications of climate change. "In order to face the ongoing challenges ...

Small non-coding RNAs can be used to predict if individuals have breast cancer conclude researchers who contribute to The Cancer Genome Atlas project. The results, which are published in EMBO reports, indicate that differences in the levels of specific types of non-coding RNAs can be used to distinguish between cancerous and non-cancerous tissues. These RNAs can also be used to classify cancer patients into subgroups of individuals that have different survival outcomes. Small non-coding RNAs are RNA molecules that do not give rise to proteins but which may have other ...

ANN ARBOR, Mich. — New research from the University of Michigan Comprehensive Cancer Center and Georgia Regents University finds that a protein that fuels an inflammatory pathway does not turn off in breast cancer, resulting in an increase in cancer stem cells. This provides a potential target for treating triple negative breast cancer, the most aggressive form of the disease. The researchers identified a protein, SOCS3, that is highly expressed in normal cells but undetectable in triple-negative breast cancer. They showed that this protein is degraded in cancers, blocking ...

One of the largest surveys of American views on religion and science suggests that the religious and scientific communities may be less combative than is commonly portrayed in the media and in politics. Only 27 percent of those surveyed said that they viewed science and religion as being in conflict with each other, with about equal percentages of those people "siding with either religion or science," said Rice University sociologist Elaine Howard Ecklund at the AAAS Annual Meeting. The survey was commissioned by the AAAS Dialogue on Science, Ethics and Religion (DoSER) ...

WASHINGTON D.C. Feb. 16, 2014 -- Tularemia, aka "rabbit fever," is endemic in the northeastern United States, and is considered to be a significant risk to biosecurity -- much like anthrax or smallpox -- because it has already been weaponized in various regions of the world. At the 58th Annual Biophysical Society Meeting, which takes place Feb. 15-19, 2014, in San Francisco, Calif., Geoffrey K. Feld, a Postdoctoral researcher in the Physical & Life Sciences Directorate at Lawrence Livermore National Laboratory (LLNL), will describe his work to uncover the secrets of the ...

WASHINGTON D.C. Feb. 16, 2014 -- A research team from Vanderbilt University Medical Center in Nashville, Tenn., is the first to decipher the 3-D structure of a protein that confers antibiotic resistance from one of the most worrisome disease agents: a strain of bacteria called methicillin-resistant Staphylococcus aureus (MRSA), which can cause skin and other infections. The Vanderbilt team's findings may be an important step in combatting the MRSA public health threat over the next 5 to 10 years. By deciphering the shape of a key S. aureus protein -- an enzyme called ...

WASHINGTON D.C. Feb. 16, 2014 -- New insights into one of the molecular mechanisms behind light harvesting, the process that enables photosynthetic organisms to thrive, even as weather conditions change from full sunlight to deep cloud cover, will be presented at the 58th Annual Biophysical Society Meeting, taking place in San Francisco from Feb. 15-19. At the meeting, Hsiang-Yu Yang, a graduate student, and Gabriela Schlau-Cohen, a postdoc in W.E. Moerner's research group at Stanford University, will describe how probing these natural systems at the single molecule level ...

BEAUFORT, N.C. -- Technological advances have made the extraction of deep sea mineral and precious metal deposits feasible, and the dwindling supply of land-based materials creates compelling economic incentives for deep sea industrialization. But at what cost? “We’re really in the dark when it comes to the ecology of the deep sea," said Linwood Pendleton, director of the Ocean and Coastal Policy Program at the Nicholas Institute for Environmental Policy Solutions at Duke University. "We know a lot about a few places, but nobody is dealing with the deep sea as a whole, ...

PROVIDENCE, R.I. [Brown University] — The South Pacific archipelago of Samoa and American Samoa harbors a global health mystery that may seem both remote and extreme but could foretell trends in obesity and related conditions across much of the developing world. About three-quarters of the U.S. territory's adult population is obese, the highest rate in the world with independent Samoa quickly catching up. Rates of type 2 diabetes top one in five and a recent study found that the elevated obesity rates are present even in newborns. This pandemic began only a few decades ...

CHICAGO --- Three anthropology professors from the Weinberg College of Arts and Sciences at Northwestern University will highlight recent research in biological anthropology Sunday, Feb. 16 at the annual meeting of the American Association for the Advancement of Science (AAAS) in Chicago. The presentations, part of the symposium "Comparative Advantage: Global Perspectives on Human Biology and Health" will be held from 1:30 to 4:30 p.m. in Crystal Ballroom A at the Hyatt Regency Chicago. Christopher Kuzawa, professor of anthropology and faculty fellow at the Institute ...

TEMPE, Ariz. – Nanoscale technology looks promising as a major contributor to advancements needed to fulfill the potential of emerging sources of clean, renewable energy. Progress in the comparatively new area of nanoelectronics in particular could be the basis for new manufacturing processes and devices to make renewable energy systems and technologies more efficient and cost-effective. Stephen Goodnick will focus on what nanoelectronics advances could do to help push the performance of solar energy systems to the next level in his talk at the 2014 annual meeting of ...

Abnormal number of chromosomes is often associated with cancer development. In a new study published in the journal Nature Structural and Molecular Biology researchers at Karolinska Institutet in Sweden have shown that a subtle epigenetic change plays an important role in the correct segregation of chromosomes. Normally when a cell divides, the chromosomes are segregated equally to two daughter cells. However, tumour cells frequently have either too few or too many chromosomes, leading to the incorrect expression of a number of genes. When a cell is about to divide, the ...

A new layer in the human cornea — discovered by researchers at The University of Nottingham last year — plays a vital role in the structure of the tissue that controls the flow of fluid from the eye, research has shown. The findings, published in a paper in the British Journal of Ophthalmology, could shed new light on glaucoma, a devastating disease caused by defective drainage of fluid from the eye and the world's second leading cause of blindness. The latest research shows that the new layer, dubbed Dua's Layer after the academic Professor Harminder Dua who ...

One factor that makes glioblastoma cancers so difficult to treat is that malignant cells from the tumors spread throughout the brain by following nerve fibers and blood vessels to invade new locations. Now, researchers have learned to hijack this migratory mechanism, turning it against the cancer by using a film of nanofibers thinner than human hair to lure tumor cells away. Instead of invading new areas, the migrating cells latch onto the specially-designed nanofibers and follow them to a location – potentially outside the brain – where they can be captured and killed. ...

A new study led by University of Minnesota researchers demonstrates that fertilization of natural grasslands -- either intentionally or unintentionally as a side effect of global farming and industry -- is having a destabilizing effect on global grassland ecosystems. Using a network of natural grassland research sites around the world called the Nutrient Network, the study represents the first time such a large experiment has been conducted using naturally occurring sites. Led by Yann Hautier, a Marie Curie Fellow associated with both the Department of Ecology, Evolution, ...