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Science News for December 15, 2011


Gene discovered for Weaver syndrome

Scientists have identified a gene mutation in the EZH2 gene that causes Weaver syndrome, a rare genetic disorder characterized by large size at birth and intellectual disability. This breakthrough discovery enables DNA-based diagnostic testing for the disease, providing definitive answers for families seeking a diagnosis.

SourceChild & Family Research Institute·JournalAmerican Journal of Human Genetics·DateDec 15, 2011

A supernova with a view

The study of the closest supernova in 25 years has shed new light on its formation. The team found that the exploding star was a white dwarf, and while they couldn't rule out a white dwarf merger, their results suggest a medium-sized star supplied the white dwarf with extra material to trigger the explosion.

Teens choose water when calorie count of sugary beverages is easier to understand

A new study found that providing clear caloric information about sugar-sweetened beverages may reduce their consumption among adolescents. Researchers discovered that physically presenting calories as physical activity equivalents was most effective in decreasing sugar-sweetened beverage purchases among black adolescents.

SourceJohns Hopkins Bloomberg School of Public Health·JournalAmerican Journal of Public Health·DateDec 15, 2011

A 'fantastic voyage' through the body -- with precision control

A 'fantastic voyage' through the body is now possible with precision control thanks to a new capsule endoscope developed by Tel Aviv University researcher Dr. Gabor Kosa. The device uses MRI technology to navigate the digestive tract, enabling doctors to detect problems and perform biopsies or local drug delivery in a non-invasive manner.

SourceAmerican Friends of Tel Aviv University·JournalBiomedical Microdevices·DateDec 15, 2011

New Research Demonstrates Lean Beef is Good for Heart Health

A new study published in American Journal of Clinical Nutrition found that diets including lean beef every day are as effective in lowering total and LDL 'bad' cholesterol as the 'gold standard' of heart-healthy diets. Participants experienced a 10% decrease in LDL cholesterol from consuming 4.0 oz/day of lean beef daily.

SourcePorter Novelli·JournalAmerican Journal of Clinical Nutrition·DateDec 15, 2011

Team pinpoints amino acid variation in immune response gene linked with ulcerative colitis

A team of researchers has pinpointed an amino acid variation in the immune response gene DRB1 as a key factor in ulcerative colitis. This association was confirmed using sophisticated association techniques and suggests that the gene plays a significant role in determining the human immune response to extracellular antigens.

Key genetic error found in family of blood cancers

Researchers have identified a critical genetic mutation in patients with myelodysplastic syndromes, which can progress to leukemia. The mutation is found in nearly 9% of patients, increasing the risk of developing acute leukemia by almost three times. The study raises hopes for improved diagnosis and treatment of this blood cancer.

SourceWashU Medicine·JournalNature Genetics·DateDec 15, 2011

Heart failure study: Health-literate patients not always adept at managing care

A study by Purdue University found that health-literate patients with advanced degrees did not manage their heart failure symptoms better than those with lower literacy levels. Health literacy, a patient's ability to read and understand health information, was associated with proper daily care but not self-care management. The research...

SourcePurdue University·JournalJournal of Cardiovascular Nursing·DateDec 15, 2011

Blood-sucking mosquitoes keep their cool

Researchers discovered that mosquitoes can control their body temperature by releasing cooling fluid during feeding, a strategy that protects them from heat stress and potential hosts' defenses. This finding has implications for controlling mosquito populations and diseases they spread.

SourceCell Press·JournalCurrent Biology·DateDec 15, 2011

Hide and seek signals

New research at the Weizmann Institute shows how blood vessel cells 'hide' signals from immune cells, only allowing those with special training to cross. This selective barrier prevents certain immune cells from reaching tumors near blood vessels.

SourceWeizmann Institute of Science·JournalNature Immunology·DateDec 15, 2011

Researchers describe a new genetic program that converts static cells into mobile invasive cells

Researchers at IRB Barcelona have discovered a new genetic program that converts epithelial cells into mobile invasive cells, which is common in embryonic development and tumour progression. The GATA6 gene plays a key role in this process, triggering survival factors and degrading the cellular matrix to facilitate cell migration.

Behavioral interventions can increase condom use, reduce sexually transmitted infections

A recent meta-analysis found that behavioral interventions can effectively promote condom use and reduce the incidence of sexually transmitted infections (STIs), including HIV, for up to four years. The studies included in the analysis assessed behavior changes and biological outcomes worldwide, with a focus on at-risk populations.

SourceLifespan·JournalJAIDS Journal of Acquired Immune Deficiency Syndromes·DateDec 15, 2011

Ohio State researchers discover hereditary predisposition of melanoma of the eye

Researchers at Ohio State University have discovered a hereditary cancer syndrome that increases risk for uveal melanoma, lung cancer, brain cancer, and possibly other types of cancer due to mutations in the BAP1 gene. The study identifies six families with this syndrome, which can be screened for using a clinical test.

SourceOhio State University Wexner Medical Center·JournalJournal of Medical Genetics·DateDec 15, 2011

Same-sex marriage laws reduce doctor visits and health care costs for gay men

A new study found that same-sex marriage laws in Massachusetts led to significant reductions in medical care visits and mental health care costs among gay and bisexual men. The study, which analyzed data from a large community-based health clinic, suggests that marriage equality may produce broad public health benefits by reducing stre...

SourceColumbia University's Mailman School of Public Health·JournalAmerican Journal of Public Health·DateDec 15, 2011

I wanna talk like you (oo)

Researchers studied Campbell's monkeys and found that females pick up habits from each other through grooming and contact calls. The study suggests that human speech evolved gradually from ancestral primate vocalisations and social patterns, influenced by environmental factors rather than genetic predisposition alone.

SourceBMC (BioMed Central)·JournalBMC Evolutionary Biology·DateDec 15, 2011

Metabolomx test detects lung cancer from breath

A study published in the Journal of Thoracic Oncology found that a breath test using Metabolomx's colorimetric sensor array can detect lung cancer and differentiate between its types with high accuracy. The test shows promise as a non-invasive, rapid, and inexpensive companion diagnostic for early lung cancer detection.

SourceBurns McClellan·JournalJournal of Thoracic Oncology·DateDec 15, 2011