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Science News Archive 2005 - Page 78


Page 78 of 165

Why IL-2 works in HIV

Researchers found that intermittent IL-2 administration induces high CD4 and CD8 cell proliferation followed by prolonged CD4 cell survival. This effect helps explain the preferential increase of CD4 cells in patients treated with IL-2 therapy.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateJul 14, 2005

Parental involvement, social understanding, protect teens from violence

A study found that boys with supportive parents are less likely to engage in violent behavior after witnessing violence, while girls with high levels of social understanding are also at risk. Interventions focusing on improving the parent-adolescent relationship and teaching social understanding may reduce violence in both boys and girls.

SourceSociety for Research in Child Development·JournalChild Development·DateJul 14, 2005

Poor sleep not a normal part of aging

Researchers recommend a five-step approach to diagnose and manage insomnia in older adults, which may lead to reduced sleep disturbances and improved health outcomes. The steps include detection, elaboration, medical or psychiatric emergency assessment, further evaluation, and intervention with lifestyle or medication changes.

SourceBlackwell Publishing Ltd.·JournalJournal of the American Geriatrics Society·DateJul 14, 2005

Heterochromatin assembly in S. pombe

Researchers have discovered a cullin-dependent E3 ligase as a crucial component of the Clr4 methyltransferase complex, controlling histone methylation and heterochromatin assembly. The study suggests that polyubiquitylation of regulatory proteins may play a key role in regulating these processes.

SourceCold Spring Harbor Laboratory·JournalGenes & Development·DateJul 14, 2005

Identifying the 'signatures' of protons in water

Researchers at Yale University have identified unique infrared laser spectrum signatures for free protons associated with one to three water molecules. The study reveals that the proton's vibrations are driven by changes in its hydration environment, leading to significant shifts in spectral signatures.

SourceYale University·JournalScience·DateJul 14, 2005

The synapse is a shotgun

Researchers have developed a biologically accurate computer simulation of synaptic function, indicating that the synapse may behave like a shotgun firing buckshot-like bursts of neurotransmitter to reach receptors arrayed beyond known receiving sites. The new data suggest an alternative mode of neurotransmission called ectopic release.

Environment and genetic influences play different roles in boys' and girls' gender-role behavior

Research by King's College London and City University found that shared environments, including prenatal factors and socialization effects, contribute significantly to gender-role behavior in early childhood. The study suggests that environmental influences are more important in shaping behavior than genetic factors during this age group.

SourceSociety for Research in Child Development·JournalChild Development·DateJul 14, 2005

DNA meets heart drugs with resistance

Researchers at Vanderbilt University have identified a DNA polymorphism that interferes with the binding of antiarrhythmic drugs to a specific ion channel in the heart. This structural change allows for variable drug access to its target site, leading to increased drug resistance in some individuals.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateJul 14, 2005

Understanding and diagnosing an inherited pain syndrome

A study published by Yale researchers found that 17 members of a family carried a specific mutation in the sodium channel Nav1.7 gene, which is associated with intense burning pain in the hands and feet triggered by heat and exercise. The discovery suggests the possibility of rational therapies targeting this affected channel.

SourceYale University·JournalBrain·DateJul 13, 2005

OHSU researchers help develop portable device to assist those combating balance disorders

Researchers at OHSU developed a portable device that uses audio cues to assist individuals with balance disorders, such as those caused by vestibular loss or Parkinson's disease. The device has shown significant improvement in reducing sway area and increasing time spent within the safe zone during early testing.

SourceOregon Health & Science University·JournalArchives of Physical Medicine and Rehabilitation·DateJul 13, 2005

New study on OTC progesterone health risks in women published

A recent study published in The Journal of Clinical Pharmacology found that use of over-the-counter (OTC) topical progesterone results in significant drug exposure through skin absorption, comparable to prescribed oral progesterone products. The study revealed similar rates of adverse effects among women taking both types of progesterone.

SourceSAGE·JournalThe Journal of Clinical Pharmacology·DateJul 13, 2005