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Science News for April 7, 2011


Welders may be at increased risk for brain damage

Researchers found that welders had an average 11.7 percent reduction in dopamine markers in the brain compared to non-welders, suggesting potential neurotoxic effects from manganese exposure. The study also revealed brain changes consistent with manganese deposits, highlighting a potential public health concern for U.S. workers.

SourceWashU Medicine·JournalNeurology·DateApr 7, 2011

Treatment for depression a long-term solution

Research suggests that treatment for depression may have long-term benefits, with depressed adults who use antidepressants being three times less likely to be depressed eight years later. Cognitive behavioral therapy has also been shown to be effective in reducing symptoms of depression.

SourceUniversity of Alberta·JournalJournal of Psychiatric Research·DateApr 7, 2011

Ancient fossils hold clues for predicting future climate change, scientists report

Scientists have discovered ancient mollusk fossils that may indicate how warm the planet will become if carbon dioxide levels are stabilized at current values. The findings suggest summertime Arctic temperatures could increase by 2-5 degrees Fahrenheit, leading to a permanent ice cap melting and further heating the planet.

SourceUniversity of California - Los Angeles·JournalEarth and Planetary Science Letters·DateApr 7, 2011

Political views are reflected in brain structure

A new report links differences in brain structure to political orientation, finding that liberals have larger anterior cingulate cortexes and are better at coping with conflicting information, while conservatives have larger amygdalas and are more sensitive to threats.

SourceCell Press·JournalCurrent Biology·DateApr 7, 2011

Freeway air bad for mouse brain

A new study reveals that exposure to vehicle pollution can cause significant brain damage in mice, including signs of memory loss and Alzheimer's disease. The tiny particles from burning fossil fuels and weathered car parts are too small for filters to trap, raising concerns about human health.

SourceUniversity of Southern California·JournalEnvironmental Health Perspectives·DateApr 7, 2011

Rethinking reprogramming: A new way to make stem cells

Researchers have discovered a new way to reprogram adult cells into an embryonic stem cell-like state using specific microRNAs and Hdac2 suppression, offering a more efficient alternative to traditional methods. This breakthrough could lead to improved strategies for developing stem cells for therapeutic use.

SourceCell Press·JournalCell Stem Cell·DateApr 7, 2011

Soy increases effectiveness of radiation at killing lung cancer, Wayne State study shows

A Wayne State University study found that soy isoflavones can sensitize cancer cells to radiation while protecting normal tissue. The study demonstrated that soy isoflavones can block DNA repair mechanisms in cancer cells, leading to increased killing of lung cancer cells by radiation

Through evolution, cavefish have lost sleep

Researchers studying Mexican Blind Cave Fish found that cave-adapted fish sleep less and are more active than their surface-dwelling relatives. The discovery suggests that the transition to a dark environment may be associated with changes in sleep behavior, potentially due to the need for continuous vigilance to find food.

SourceCell Press·JournalCurrent Biology·DateApr 7, 2011

Scientists have new measure for species threat

A new index called SAFE (Species Ability to Forestall Extinction) measures how close a species is to extinction. The index provides a formula for calculating the minimum viable population size, allowing conservationists to prioritize resources on species most likely to be brought back from the brink of extinction.

SourceUniversity of Adelaide·JournalFrontiers in Ecology and the Environment·DateApr 7, 2011

Michigan's collaborative quality improvement program cuts costs, improves patient care

A collaborative quality improvement program between Blue Cross Blue Shield of Michigan and the University of Michigan Health System has improved safety and quality in several clinical areas, resulting in significant cost savings. The program achieved measurable drops in surgical complications, with a reduction of $20 million annually.