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Science News for January 13, 2010


Dual role for immune cells in the brain

Researchers found that macrophages along the blood-brain barrier can either activate the brain's stress response machinery or prevent excessive inflammation. This discovery may pave the way for novel therapies for neurodegenerative diseases.

SourceSalk Institute·JournalNeuron·DateJan 13, 2010

CSHL scientists use next-gen sequencing to rapidly discover genetic cause of devastating disorder

Scientists from CSHL and Hebrew University Medical Center use next-gen sequencing to rapidly identify the mutated TMEM216 gene as the cause of Joubert Syndrome. The study reveals a high carrier rate of 1:92 among Ashkenazi Jews, making it possible to prevent the disease through premarital genetic screening.

SourceCold Spring Harbor Laboratory·JournalAmerican Journal of Human Genetics·DateJan 13, 2010

Gender-biased heart damage

Researchers found that male hormones can help vessels around the heart regenerate, potentially explaining why men experience worse heart attacks earlier in life. Androgen replacement therapy might one day be used to treat men at risk for heart disease.

SourceRockefeller University Press·JournalJournal of Experimental Medicine·DateJan 13, 2010

Nursing students twice as likely to smoke as the general population

A recent survey of over 800 new nursing students in Italy found that more than half were current or former smokers, with 44% still smoking and 12% being former smokers. The study also highlighted the significant influence of family members on smoking habits, with three-quarters of smoking students having at least one parent who smoked.

SourceWiley·JournalJournal of Advanced Nursing·DateJan 13, 2010

Self-control is contagious, study finds

Researchers found that watching or thinking about someone with good self-control makes others more likely to exert self-control. Conversely, people with bad self-control influence others negatively. The effect of self-control is so powerful that subliminal exposure can change behavior.

SourceUniversity of Georgia·JournalPersonality and Social Psychology Bulletin·DateJan 13, 2010

UCSF study finds African-Americans bear disproportionate burden of smoking costs in California

A new analysis by UCSF researchers found that African Americans account for over 8% of smoking-attributable healthcare expenditures and 13% of smoking-attributable mortality costs in California. The study aimed to provide an objective picture of the economic burden of tobacco use on African American Californians.

SourceUniversity of California - San Francisco·JournalAmerican Journal of Public Health·DateJan 13, 2010

Scent of a woman: Men's testosterone responses to olfactory ovulation cues

A new study published in Psychological Science found that men's testosterone levels increase when exposed to scents from women who are ovulating. The research suggests that this response may promote mating-related behavior in males. This study provides direct evidence of the influence of olfactory cues on male biological responses.

SourceAssociation for Psychological Science·JournalPsychological Science·DateJan 13, 2010

Young men consuming an alarming amount of salt

A study by the University of Gothenburg found that young Swedish men are consuming at least double the recommended daily amount of salt. The high salt intake may lead to high blood pressure, a major risk factor for heart problems and stroke, although no direct connection was detected in the study.

SourceUniversity of Gothenburg·JournalPublic Health Nutrition·DateJan 13, 2010