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Science News Archive July 2007 - Page 2


Page 2 of 16

Hopkins team develops first mouse model of schizophrenia

Researchers created a genetically engineered mouse that models both anatomical and behavioral defects of schizophrenia, a complex brain disorder. The new mouse is based on a genetic change in the DISC1 gene, which affects nerve cell function, and shows characteristic defects in brain structure and behavior.

SourceJohns Hopkins Medicine·JournalProceedings of the National Academy of Sciences·DateJul 30, 2007

Farmers unhappiest of all self-employed workers

A study published in Occupational and Environmental Medicine reveals that farmers scored lowest on measures of productivity, health status, and quality of life. Despite having more control over their work, farmers experience high levels of stress and need increased social and emotional support.

SourceBMJ Specialty Journals·JournalOccupational and Environmental Medicine·DateJul 30, 2007

Jan Löwe awarded 2007 EMBO Gold Medal

Jan Löwe's groundbreaking research elucidated the structure and function of proteins involved in bacterial cell division, showcasing the complexity and sophistication of bacterial cells. His work highlights the importance of structural biology in understanding fundamental biological mechanisms.

SourceEMBO·DateJul 30, 2007

Race plays a role in disability in older adults with arthritis

A new study found that racial disparities play a significant role in the development of disability among older adults with arthritis. The study, which included over 7,200 respondents, showed that African Americans and Hispanic/Spanish groups experienced significantly higher rates of disability compared to whites.

SourceWiley·JournalArthritis Care & Research·DateJul 30, 2007

Learning to evolve: With a little help from my ancestors

A new theory proposes that learning skills, such as flying, accelerates the evolution of innate abilities in birds by creating a latent memory that reduces the need for future generations to learn. This is achieved through the use of distributed representations in neural networks, which allows for faster evolution of adaptive behaviors.

SourcePLOS·JournalPLOS Computational Biology·DateJul 30, 2007

Flip of genetic switch causes cancers in mice to self-destruct, Stanford researchers find

A study in mice shows that switching off a single malfunctioning gene can halt the growth of tumor cells and turn them back to their normal life cycle. The researchers found that cancer cells retained the ability to undergo senescence, a natural mechanism that causes cells to die when they become old or dysfunctional.

SourceStanford Medicine·JournalProceedings of the National Academy of Sciences·DateJul 30, 2007

A potential new disease-modifying drug for osteoarthritis

Researchers found that oral calcitonin effectively protects against articular cartilage degradation and surface erosions in ovariectomized rats, a model for postmenopausal women. Calcitonin worked better than estrogen therapy, preventing cartilage erosions completely.

SourceWiley·JournalArthritis & Rheumatism·DateJul 30, 2007

Parents seeking sex abandon 1 in 3 offspring

A study published in Journal of Evolutionary Biology found that penduline tit parents frequently abandon 1 in 3 clutches of eggs to pursue new mates. This unique breeding strategy allows for improved reproductive success but also poses risks for the young.

SourceUniversity of Bath·JournalJournal of Evolutionary Biology·DateJul 30, 2007

Hip and knee replacements rarely performed in patients over 100

A new study found that hip and knee replacements are rarely performed in patients over 100 due to concerns about short-term life expectancy. However, the research suggests that these procedures should not be denied solely based on age and that the benefits may outweigh the risks.

SourceWiley·JournalArthritis Care & Research·DateJul 30, 2007

Wider buffers are better

A US EPA study found that wider vegetated borders around streams are the most effective way to protect wetlands from nitrogen pollution. The study showed that wide buffers (>50 meters) removed more nitrogen than narrow buffers (0-25 meters), and that herbaceous and forest vegetation were more effective when wider.

SourceAmerican Society of Agronomy·JournalJournal of Environmental Quality·DateJul 30, 2007

Congenital diaphragmatic hernia

Research suggests that congenital diaphragmatic hernia does not disrupt pulmonary surfactant maturation in human fetuses, contrary to previous findings. The study provides new insights into the development of this complex condition.

SourcePLOS·JournalPLOS Medicine·DateJul 30, 2007

Zebrafish: It's not your parents' lab rat

A team of researchers at Rice University studied the gene LMO4 in zebrafish, discovering its role in regulating brain growth and development. They found that overexpression of the gene led to shrinkage of brain areas, while underexpression caused their enlargement.

SourceRice University·JournalDevelopmental Biology·DateJul 30, 2007

Researchers think pink to produce 'green' solar energy

Researchers at Ohio State University have developed new pink dye-sensitized solar cells with half the efficiency of commercially available silicon-based solar cells, but at one quarter of the cost. The new materials use complex metals and novel particle shapes to boost electricity production.

SourceOhio State University·JournalJournal of the American Chemical Society·DateJul 30, 2007

Immune response in melioidosis

Researchers found that only Toll-like receptor 2 (TLR2) played a significant role in the immune response to Burkholderia pseudomallei, a gram-negative bacterium causing melioidosis. This discovery suggests that inhibiting TLR2 may be a potential treatment strategy for this severe infection.

SourcePLOS·JournalPLOS Medicine·DateJul 30, 2007

Lithium and bone healing

Researchers discovered a novel molecular pathway involved in bone healing and found that lithium can activate it, but only when treatment is given after the fracture occurs. The study showed accelerated bone healing in mice with activated '-catenin signaling pathway.

SourcePLOS·JournalPLOS Medicine·DateJul 30, 2007

Test scores slow under No Child Left Behind reforms, gauged by states/federal assessment

A recent study by Bruce Fuller and colleagues found that progress in raising test scores was stronger before No Child Left Behind was approved, compared to the four years following enactment of the law. The researchers tracked progress in both state and federal test scores in 12 diverse states, going back to 1992, and found that annual...

SourceAmerican Educational Research Association·JournalEducational Researcher·DateJul 30, 2007

Negative effects of plastic's additive blocked by nutrient supplements

A new study found that pregnant mothers taking folic acid or genistein supplements can protect their offspring from the negative effects of BPA, a common chemical used in plastics. The study showed that even low levels of BPA exposure can cause epigenetic changes in offspring, leading to increased disease susceptibility.

SourceDuke University Medical Center·JournalProceedings of the National Academy of Sciences·DateJul 30, 2007

Research links genetic mutations to lupus

A recent study published in Nature Genetics has found a genetic mutation linked to systemic lupus erythematosus, a complex autoimmune disease. The discovery identifies variations of the TREX1 gene as a risk factor for developing lupus, shedding new light on its causes and potentially paving the way for new treatments.

SourceAtrium Health Wake Forest Baptist·JournalNature Genetics·DateJul 29, 2007

Graphene sniffs out dangerous molecules

Researchers have created graphene-based devices that can detect individual molecules of a toxic gas, offering potential applications for detecting hidden explosives and deadly carbon monoxide. The discovery was made by Dr Kostya Novoselov and Professor Andre Geim at the University of Manchester.

SourceUniversity of Manchester·JournalNature Materials·DateJul 29, 2007