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Science News for September 24, 2013


Low testosterone may be linked to heart problems

A recent study found a modest connection between low testosterone and an increased risk of developing or dying from heart disease. However, treating low testosterone with hormone replacement therapy did not have any beneficial effect on cardiovascular health.

SourceThe Endocrine Society·JournalThe Journal of Clinical Endocrinology & Metabolism·DateSep 24, 2013

Greek crisis has biological health effects

A study from Linköping University found that Greek students reported poorer health and higher stress hormone cortisol levels than Swedish counterparts, despite lower perceived stress. The research suggests the social crisis in Greece is having biological effects on its residents.

SourceLinköping University·JournalPLOS ONE·DateSep 24, 2013

Scientists discover environmental enrichment for TBI patients may counter shrinkage in the brain

A study published in Frontiers in Human Neuroscience found that environmental enrichment can help counteract brain atrophy in people with chronic moderate-severe traumatic brain injury (TBI). The study, led by Dr. Robin Green, suggests that increased physical, social, and cognitive stimulation can slow down brain shrinkage.

SourceUniversity Health Network·JournalFrontiers in Human Neuroscience·DateSep 24, 2013

How the gut got its villi

Researchers at Harvard University investigated the process of villification, which shapes gut villi, and found similarities in its principles across different animal species. They discovered that mechanical forces from muscle layer differentiation drive early villus growth.

SourceHarvard University·JournalScience·DateSep 24, 2013

Pfizer Pharmaceuticals supports MARC project

COHRED and Pfizer support MARC Phase II, an interventional approach to address ethical review bottlenecks in the African research landscape. The project aims to connect networks, foster innovation, and drive high standards for clinical trials globally.

SourceCOHRED·DateSep 24, 2013

Counting on neodymium

An interdisciplinary team from Jülich and Aachen produced robust magnetic molecules with neodymium, enabling direct electrical readout. These molecules could replace conventional electronic components, reducing energy consumption and increasing data processing capabilities.

SourceForschungszentrum Juelich·JournalNature Communications·DateSep 24, 2013

Fusion, anyone?

Researchers at National Ignition Facility have made significant progress in creating a self-sustained fusion reaction, but still face challenges to overcome before achieving the highly stable and precisely directed implosion required for ignition.

SourceAmerican Institute of Physics·JournalPhysics of Plasmas·DateSep 24, 2013

World Heart Day 2013

Research by Dr Norman Mangner found that obese children exhibit early stages of atherosclerosis and insulin resistance, increasing their risk of cardiovascular disease. Adopting a healthy lifestyle from childhood is essential to prevent these conditions and reduce the risk of heart disease.

Stepfamilies add to caregiver burden

A University of Michigan study explores how divorce and remarriage impact caregivers, finding that adult stepchildren can be a source of stress. The research highlights the need for tailored interventions to address the unique needs of re-partnered older adults in complex family situations.

SourceUniversity of Michigan·JournalJournal of Marriage and Family·DateSep 24, 2013

4-year repeat of bone mineral density screening in seniors offers limited value

A recent study published in JAMA found that repeating bone mineral density (BMD) tests after four years offers limited value in assessing bone fracture risk in seniors aged 75 and older. The study suggests that updating clinical characteristics in the Fracture Risk Assessment Tool (FRAX) instead of repeating BMD tests may be a more eff...

Reliable method detects suicidal propensity

A new study published in Journal of Psychiatric Research reveals that a simple measurement of the sweat gland activity can determine if a person is suicidal, confirming previous research. The test found a strong correlation between hyporeactivity and suicide in depressed people, with 97% accuracy.

SourceLinköping University·JournalJournal of Psychiatric Research·DateSep 24, 2013

'Traffic light' test could prevent hundreds of people developing alcohol-related cirrhosis

A simple 'traffic light' test developed by the University of Southampton has shown promise in reducing harmful drinking rates and potentially preventing hundreds of alcohol-related deaths. The test, which costs £50, can detect hidden liver fibrosis and cirrhosis in high-risk populations and advises patients to reduce or avoid drinking.

SourceUniversity of Southampton·JournalBritish Journal of General Practice·DateSep 24, 2013

Uphill for the trees of the world

A study by Aarhus University researchers found that global forests are being cleared and restricted to steep terrain, leading to reduced biodiversity. The shift is driven by human activities such as agriculture, urbanization, and efficient land use practices.

SourceAarhus University·JournalNature Communications·DateSep 24, 2013

A link between zinc transport and diabetes

Researchers found that SLC30A8 zinc transporter is crucial for insulin clearance by the liver and signals to stop releasing insulin. The study also discusses the dynamic regulatory role of zinc in insulin regulation.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateSep 24, 2013

UK study shows improvements in life expectancy in type 1 diabetes which should now be reflected in life insurance and other relevant policies for those with the condition

A UK study found improved life expectancy for people with type 1 diabetes, particularly among younger individuals. The research suggests that this improvement should be reflected in life insurance policies, but gaps in life expectancy remain between the T1DM population and general populations.

Genetic study pushes back timeline for first significant human population expansion

A recent genetic study challenges the long-held assumption that the Neolithic age marked the beginning of a global population explosion. Researchers found evidence of significant human population expansion dating back to the Paleolithic era, around 60,000-80,000 years ago.

Do anaesthetics trigger stress?

Researchers evaluated nine commonly used anaesthetics and found that several cause stress responses in zebrafish. Etomidate was deemed the most suitable for future routine use, improving the welfare standards of millions of fish used in scientific research worldwide.

SourceUniversity of Bristol·JournalPLOS ONE·DateSep 24, 2013

JCI early table of contents for Sept. 24, 2013

Researchers develop mouse models of hereditary spastic paraplegia and distal renal tubular acidosis to understand the molecular mechanisms underlying these diseases. The studies reveal key roles for REEP1 in ER shaping and β-intercalated cells in maintaining fluid and electrolyte balance.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateSep 24, 2013

A neurological basis for the lack of empathy in psychopaths

A neuroimaging study found that individuals with psychopathy fail to activate brain areas associated with empathy and concern for others when imagining others in pain. This atypical pattern of activation suggests that psychopaths may not care for others, but could be triggered into emotional response through cognitive-behavior therapies.

SourceFrontiers·JournalFrontiers in Human Neuroscience·DateSep 24, 2013