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Science News for November 23, 2009


Study highlights from November issue of GIE: Gastrointestinal Endoscopy

A recent study published in the November issue of Gastrointestinal Endoscopy found that six percent of asymptomatic women underwent endoscopic screening and were diagnosed with Barrett's esophagus. Additionally, researchers demonstrated the accuracy of EUS-FNA in diagnosing pancreatic endocrine tumors, predicting five-year survival rat...

SourceAmerican Society for Gastrointestinal Endoscopy·JournalGastrointestinal Endoscopy·DateNov 23, 2009

Medical 'pay for performance' programs help improve care -- but not always, study finds

A new study found that certain types of financial incentives for improving patient care have a positive effect on patient experiences. However, placing too much emphasis on physician productivity can actually harm patient satisfaction. Researchers analyzed data from 124,021 patients and found improvements in areas like communication an...

SourceUniversity of California - Los Angeles·JournalJournal of General Internal Medicine·DateNov 23, 2009

Road rage

A new study found that rats exposed to fuel vapor from both leaded and unleaded gasoline exhibited increased aggressive behavior. Exposure to either type of fuel vapor led to significant changes in brain chemistry, including fluctuations in neurotransmitters.

SourceBMC (BioMed Central)·JournalBMC Physiology·DateNov 23, 2009

New chameleon species discovered in East Africa

A new chameleon species has been discovered in Tanzania's Magombera Forest, with the specimen named Kinyongia magomberae. The discovery highlights the importance of protecting this area, which is home to endangered red colobus monkeys and under threat from habitat loss.

SourceUniversity of York·JournalAfrican Journal of Herpetology·DateNov 23, 2009

How green is your house?

A UK survey of 1500 respondents found that those who own their own home are more likely to separate rubbish than renters, while switching off lights in unused rooms is the most popular green behavior. The survey also shows that taking fewer flights and car sharing are less common.

Umbilical cord blood stem cell transplant may help lung, heart disorders

Researchers found that transplanted human-derived umbilical cord blood stem cells had positive therapeutic effects on specific lung and heart disorders in animal models. The study showed that MSCs have anti-inflammatory effects and can differentiate into various cell types, including lung-specific cells.

Exposures to metals and diesel emissions in air linked to respiratory symptoms in children

A new study found that exposure to airborne metals like nickel and vanadium, as well as diesel exhaust particles, are associated with respiratory symptoms in young children. The study controlled for other risk factors and suggests improved regulatory action is needed to protect urban children.

SourceColumbia University's Mailman School of Public Health·JournalAmerican Journal of Respiratory and Critical Care Medicine·DateNov 23, 2009

Why circumcision reduces HIV risk

Male circumcision significantly reduces HIV infection risk by 60% in rural Uganda men. The removal of foreskin tissue containing HIV target cells explains most of the protection. Circumcision also reduces genital ulcer disease by lowering rates of trauma-induced ulcers, not just those caused by herpes.

SourcePLOS·JournalPLOS Medicine·DateNov 23, 2009

Is global warming unstoppable?

A University of Utah scientist argues that energy conservation doesn't save energy, but instead spurs economic growth and accelerated energy consumption. The study finds a constant link between global energy use and accumulated economic productivity, tied to a physical constant of 9.7 milliwatts per inflation-adjusted dollar.

SourceUniversity of Utah·JournalClimatic Change·DateNov 23, 2009

Diabetics show alarming increase in morbid obesity

A recent study by Loyola University Health System found that one out of five adults with Type 2 diabetes is morbidly obese. The rate of morbid obesity among people with diabetes increased by 141% between 1976 and 2006, highlighting the growing public health implications.

SourceLoyola Medicine·JournalJournal of Diabetes and its Complications·DateNov 23, 2009

Scientists watch as peptides control crystal growth with 'switches, throttles and brakes'

Researchers produced single-molecule resolution images of peptide-mineral interaction, revealing mechanisms that molecules use to bind to surfaces. Peptides slow down or speed up crystal growth depending on conditions, offering potential solutions for pathological mineralization and kidney stone treatment.

SourceDOE/Lawrence Livermore National Laboratory·JournalProceedings of the National Academy of Sciences·DateNov 23, 2009

Research reveals exactly how coughing is triggered by environmental irritants

Researchers have identified the reaction inside the lungs that can trigger coughing when exposed to certain air pollutants and irritants. The study found that switching on receptor proteins called TRPA1 on nerve endings in the lungs triggers a cough reflex, which could potentially be treated by blocking these receptors.

SourceImperial College London·JournalAmerican Journal of Respiratory and Critical Care Medicine·DateNov 23, 2009

Visual assistance for cosmic blind spots

Researchers at Max Planck Institute for Astrophysics create a system called information field theory (IFT) to reconstruct incomplete image data. IFT asks two questions to determine the probability of images based on measured data and prior knowledge, allowing for optimal reconstruction in areas where telescopes are blind.

SourceMax-Planck-Gesellschaft·JournalPhysical Review D·DateNov 23, 2009

The unequal world of health data

A lack of quantity and quality of health data from poor settings threatens global research, warns Peter Byass. Alternative strategies to improve health data representativeness are discussed.

SourcePLOS·JournalPLOS Medicine·DateNov 23, 2009

Johns Hopkins researchers track down protein responsible for chronic rhinosinusitis with polyps

Johns Hopkins researchers found that a protein called vascular endothelial growth factor (VEGF) is responsible for the cell overgrowth in chronic rhinosinusitis with polyps. This discovery gives scientists a new target for treating this form of the disease, which typically resists current treatments.

SourceJohns Hopkins Medicine·JournalAmerican Journal of Respiratory and Critical Care Medicine·DateNov 23, 2009

Rescuing male turkey chicks

A new technique using infrared spectroscopy can accurately determine the gender of six-week-old turkey poults with over 95% accuracy, potentially saving millions of male chicks from being killed shortly after birth. This method could be used by the breeding industry to identify female eggs for breeding and select female turkeys.

SourceSpringer·JournalAnalytical and Bioanalytical Chemistry·DateNov 23, 2009

Lessons for HIV learned from monkey control of SIV infection

Researchers have discovered that SIV induces a vigorous immune response in both natural and susceptible hosts, but only in natural hosts is the response brought under control. This study provides new insights into how to control HIV infection of humans by understanding the mechanisms behind SIV's rapid control of immune activation.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateNov 23, 2009

Drug ads ineffective for boosting sales, could cost taxpayers: UBC-Harvard study

A new study published in Archives of Internal Medicine found that direct-to-consumer advertising (DTCA) for clopidogrel had no significant effect on sales, contributing to a $207 million price increase for Medicaid. The study suggests that pharmaceutical companies may be passing on ad costs to consumers through higher prices.

SourceUniversity of British Columbia·JournalArchives of Internal Medicine·DateNov 23, 2009

JCI table of contents: Nov. 23, 2009

A study identified a gene variant associated with elevated baseline blood pressure, suggesting it may be a good target for drugs to alleviate stress-induced hypertension. The researchers also found that the protein generated by this gene influences sympathetic activity and prevents stress-induced hypertension in both mice and humans.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateNov 23, 2009

Achieving asthma control in preschoolers

A recent review highlights the need for improved asthma control in preschoolers, with key findings including the use of inhaled corticosteroids as a regular therapy for children with severe symptoms. The authors emphasize the importance of considering alternative conditions if children do not respond to optimal therapy.

SourceCanadian Medical Association Journal·JournalCanadian Medical Association Journal·DateNov 23, 2009

Gene implicated in stress-induced high blood pressure

Researchers identify phosducin's role in modulating blood pressure in response to stress, finding increased baseline and stress-dependent blood pressure in mice and humans. The study suggests phosducin as a promising target for developing drugs to alleviate stress-induced hypertension.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateNov 23, 2009