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Science News for May 14, 2009


Parental guidelilnes, consequences may be why fewer black teens smoke than whites

A University of Washington study found that black teens are less likely to start smoking as adolescents due to parental guidelines and consequences. Teens who associate with deviant peers are more likely to smoke, regardless of race. Parents can reduce their teen's likelihood of smoking by setting clear guidelines and maintaining a str...

SourceUniversity of Washington·JournalNicotine & Tobacco Research·DateMay 14, 2009

Infant sleep patterns and parenting focus of study

The SIESTA II project aims to understand the role of parenting in infant sleep development, exploring how parents' emotional availability affects their child's sleep quality. The study will investigate how consistent bedtime rituals, parental support, and stress levels impact infant sleep habits.

Good fences make good neighbors

The study reveals how a single event can trigger the collapse of molecular fences, leading to the inactivation of tumor suppressor genes and the initiation of tumorigenesis. The researchers discovered that the loss of PARlation marks on CTCF protein allows it to fail to regulate critical genes, including p16 and RASSF1A.

SourceSalk Institute·JournalMolecular Cell·DateMay 14, 2009

Gene hunters target child kidney failure

Researchers have identified a potential genetic link to vesicoureteric reflux (VUR), a common cause of urinary tract infections and kidney failure in children. The study found that the VUR susceptibility gene is located on chromosome 12 and may be inherited in an autosomal recessive fashion.

SourceAmerican Society of Nephrology·JournalJournal of the American Society of Nephrology·DateMay 14, 2009

Human nose too cold for bird flu, says new study

Research suggests that avian influenza viruses struggle to grow and spread in the human nose due to its cooler temperature, making it less likely to cause respiratory illness. The study also found that mutated viruses with proteins from avian influenza viruses are unlikely to thrive at human nose temperatures.

SourceImperial College London·JournalPLOS Pathogens·DateMay 14, 2009

Cholesterol-busting bug with a taste for waste

Researchers have isolated a new species of bacteria that can break down cholesterol, a contaminant found in urban sewage residues. The novel organism, Gordonia cholesterolivorans, has the potential to clean up cholesterol-related contamination and could be used for industrial applications.

SourceMicrobiology Society·JournalINTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY·DateMay 14, 2009

Researchers gain genome-wide insights into patterns of the world's human population structures

Researchers used sophisticated statistical analyses to study genomic patterns of human population structure, revealing 18 significant axes of variation. These findings provide insights into the history of human evolution, evolutionary forces shaping local populations, and geographic correlations with genetic variation.

SourceUniversity of Washington·JournalAmerican Journal of Human Genetics·DateMay 14, 2009

Brain's organization switches as children become adults

A new study reveals that child brains are differently organized than adult brains, but still capable of performing complex cognitive tasks. Researchers found that young brains have localized networks based on physical proximity, which transition to long-distance networks centered on functionality as children mature.

SourceWashU Medicine·JournalPLOS Computational Biology·DateMay 14, 2009

Bad side of eCommerce recommendation systems: Overemphasis on hits and blockbusters

Research in Management Science reveals that recommender systems can create self-reinforcing cycles favoring popular items, reducing diversity and serving consumers and producers poorly. To mitigate this issue, designers must consider modifications to limit popularity effects and promote exploration in their recommender systems.

DNA gripped in nanopores

A team of researchers used nanopores to investigate the movement of DNA in a gel, finding that larger pores reduce resistance and calculations based solely on electrostatic forces did not accurately predict results. The study's unique combination of techniques offers promising developments in single molecule techniques.

Can happiness be inherited?

A new article published in Elsevier's journal Bioscience Hypotheses proposes that the chemicals generated by our brain during different moods can impact 'germ cells,' altering gene expression and affecting child development. This could have a lasting impact on a child's emotional state, including their happiness.

SourceElsevier·JournalBioscience Hypotheses·DateMay 14, 2009

M. D. Anderson study first to evaluate prevalence, impact of off label chemotherapy in breast cancer

A study by M. D. Anderson Cancer Center researchers found that over one-third of metastatic breast cancer patients receive chemotherapy off-label, with 34.9% of women treated with an unapproved drug at some point during their care. The most common off-label chemotherapies noted were vinorelbine and gemcitabine, both shown to be efficac...

Early and network-oriented care may help adolescents at risk of developing psychosis

A Finnish study suggests that family and network-oriented, stress-reducing care can improve the overall functioning and mental health of adolescents at risk of developing psychosis. The JERI project provides a multiprofessional, community- and family-focused intervention that reduces stress levels and supports adolescents in their natu...

SourceUniversity of Helsinki·JournalEarly Intervention in Psychiatry·DateMay 14, 2009