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Science News for March 31, 2005


Sexual lifestyles vary among ethnic groups in Britain

A study of 12,110 men and women aged 16-44 in Great Britain found significant variations in sexual behavior and sexually transmitted infection (STI) rates among white, black Caribbean, black African, Indian, and Pakistani groups. Indian and Pakistani individuals reported fewer STIs and more consensual relationships.

SourceThe Lancet_DELETED·JournalThe Lancet·DateMar 31, 2005

Follow the energy

Scientists have developed a new technique to track molecular energy transfer in photosynthesis, revealing distinct energy pathways and quantum mechanical effects. This breakthrough may lead to more efficient artificial photosynthesis systems and sustainable energy sources.

Targeting tumor growth

Researchers discover that MT1-MMP controls blood vessel response to PDGF-ß signaling, essential for normal vessel formation. MT1-MMP-null mice exhibit severely compromised vascular architecture, suggesting potential therapeutic targets for controlling tumor growth and metastasis.

SourceCold Spring Harbor Laboratory·JournalGenes & Development·DateMar 31, 2005

Balancing act at chromosome ends

Researchers have identified a novel protein, MKRN1, that regulates telomerase activity and maintains cellular telomere lengths. Increasing MKRN1 levels in cells promotes the degradation of telomerase enzyme hTERT, leading to decreased telomerase activity and shorter telomeres.

SourceCold Spring Harbor Laboratory·JournalGenes & Development·DateMar 31, 2005

More evidence of cannabis-induced psychosis

Researchers found two cases of severe anxiety and impaired psychomotor functions in male subjects who received oral cannabis, despite low blood concentrations. The study suggests that ingesting THC may produce potent metabolites that induce psychotic effects, contradicting previous expectations of safety with low doses.

SourceBMC (BioMed Central)·JournalBMC Psychiatry·DateMar 31, 2005