Brightsurf Science News & Current Events

January 02, 2012
Hepatitis C virus hijacks liver microRNA
Scientists at the University of North Carolina at Chapel Hill, working with colleagues from the University of Colorado, have shown for the first time how a small RNA molecule that regulates gene expression in human liver cells has been hijacked by the hepatitis C virus to ensure its own survival -- helping medical scientists understand why a new antiviral drug appears to be effective against the virus.

Researchers create a healthier cigarette
From a health care perspective, the best cigarette is no cigarette, but for the millions of people who try to quit smoking every year, researchers from Cornell University may have found a way to make cigarette smoking less toxic.

Christmas Comet Lovejoy Captured at Paranal
The recently discovered Comet Lovejoy has been captured in stunning photos and time-lapse video taken from ESO's Paranal Observatory in Chile.

Deep brain stimulation shows promising results for unipolar and bipolar depression
A new study shows that deep brain stimulation is a safe and effective intervention for treatment-resistant depression in patients with either unipolar major depressive disorder or bipolar ll disorder.

ACP's Ethics Manual examines emerging issues in medical ethics
The American College of Physicians has released the sixth edition of its Ethics Manual, published as a supplement to the current issue of Annals of Internal Medicine, ACP's flagship journal, and available online.

Study finds another potential risk factor for developing dementia and Alzheimer's disease in women
A hormone derived from visceral fat called adiponectin may play a role as a risk factor for development of all-cause dementia and Alzheimer's disease in women, according to a study published Online First by the Archives of Neurology, one of the JAMA/Archives journals.

Changes seen in cerebrospinal fluid levels before onset of Alzheimer dementia
Cerebrospinal fluid levels of Aβ42 appear to be decreased at least five to 10 years before some patients with mild cognitive impairment develop Alzheimer disease dementia whereas other spinal fluid levels seem to be later markers of disease, according to a report in the January issue of Archives of General Psychiatry, one of the JAMA/Archives journals.

Study evaluates effects of marijuana ingredients on brain functioning during visual stimuli
Different ingredients in marijuana appear to affect regions of the brain differently during brain processing functions involving responses to certain visual stimuli and tasks, according to a report in the January issue of Archives of General Psychiatry, one of the JAMA/Archives journals.

Schizophrenia diagnosis associated with progressive brain changes among adolescents
Adolescents diagnosed with schizophrenia and other psychoses appear to show greater decreases in gray matter volume and increases in cerebrospinal fluid in the frontal lobe compared to healthy adolescents without a diagnosis of psychosis, according to a report in the January issue of Archives of General Psychiatry, one of the JAMA/Archives journals.

Demographic and clinical factors appear associated with survival in patients with Parkinson's disease
Demographics and clinical factors appear to be associated with survival in patients with Parkinson's disease, and the presence of dementia is associated with a significant increase in mortality, according to a report in the January issue of Archives of Neurology, one of the JAMA/Archives journals.

Annals of Internal Medicine tip sheet for Jan. 3, 2012
Below is information about articles being published in the Jan.

Quantitative CT helps identify COPD patients at risk for exacerbations
National Jewish Health researchers report that a computerized form of radiology, known as quantitative CT, can offer valuable prognostic information about patients with Chronic obstructive pulmonary disease.

Gestational diabetes and low socioeconomic status linked with increased risk of ADHD in offspring
Children exposed to maternal gestational diabetes mellitus and low socioeconomic status, particularly in combination, appear to be at an increased risk of developing childhood ADHD, according to a report published online first by Archives of Pediatrics & Adolescent Medicine, one of the JAMA/Archives journals.

Physical activity, school performance may be linked
A systematic review of previous studies suggests that there may be a positive relationship between physical activity and the academic performance of children, according to a report in the January issue of Archives of Pediatrics & Adolescent Medicine, one of the JAMA/Archives journals.

Gestational diabetes and low socioeconomic status raise risk of ADHD in children
In the first study of its kind, researchers at Queens College and Mount Sinai School of Medicine have found that low socioeconomic status and maternal gestational diabetes together may cause a 14-fold increased risk of attention deficit hyperactivity disorder in six-year-olds.

50 million year old cricket and katydid fossils hint at the origins of insect hearing
How did insects get their hearing? A new study of 50 million year-old cricket and katydid fossils -- sporting some of the best preserved fossil insect ears described to date -- help trace the evolution of the insect ear, says a new study by researchers working at the National Evolutionary Synthesis Center.

A firmer understanding of muscle fibrosis
Researchers describe how increased production of a microRNA promotes progressive muscle deterioration in a mouse model of Duchenne muscular dystrophy, according to a study published online on Jan.

Humble people are more likely to lend a helping hand, Baylor University study finds
Humble people are more likely to offer time to someone in need than arrogant people are, according to findings by Baylor University researchers published online in the Journal of Positive Psychology.
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