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Science News for September 16, 2007


New nanoparticle vaccine is more effective but less expensive

Researchers at EPFL have developed a nanoparticle vaccine that delivers vaccines more effectively with fewer side effects, at a fraction of the cost. The technology targets dendritic cells to trigger a strong immune response, and has potential applications for diseases like hepatitis and malaria.

SourceEcole Polytechnique Fédérale de Lausanne·JournalNature Biotechnology·DateSep 16, 2007

Genetic variant linked to odor perception

Researchers discovered that specific genetic variants of an odor receptor determine how people perceive pleasant or unpleasant odors. The study focused on two sex steroid-derived chemicals and found that different genetic variations led to varying reactions.

SourceDuke University Medical Center·JournalNature·DateSep 16, 2007

Gene determines whether male body odor smells pleasant

A new study reveals that a single gene, OR7D4, plays a crucial role in determining how people perceive the scent of androstenone, a potent ingredient in male body odor. Variants of this gene can make humans perceive androstenone as sweet or unpleasant, with some unable to detect it at all.

SourceRockefeller University·JournalNature·DateSep 16, 2007
SAMSUNG T9 Portable SSD 2TB

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The importance of gene regulation for common human disease

A new study reveals that genetic variation in regions controlling gene activity is a significant contributor to common diseases. The researchers analyzed the activity of almost 14,000 genes and found over 1300 genes affected by DNA sequence changes in regulatory regions.

SourceWellcome Trust Sanger Institute·JournalNature Genetics·DateSep 16, 2007

Good earth: Brown chemists show origin of soil-scented geosmin

Researchers have found that the protein responsible for producing geosmin, a soil-scented compound, has two distinct halves that work together to create the organic compound. This discovery could help microbiologists develop strategies to block geosmin in drinking water, which can cause an unpleasant taste.

SourceBrown University·JournalNature Chemical Biology·DateSep 16, 2007

Cholesterol byproduct blocks heart health benefits of estrogen

A recent study published in Nature Medicine found that a byproduct of cholesterol metabolism, 27-hydroxycholesterol (27HC), interferes with the protective effects of estrogen on the cardiovascular system. When 27HC levels are high relative to estrogen, it blocks estrogen's function and leads to a loss of protection against heart disease.

SourceUT Southwestern Medical Center·JournalNature Medicine·DateSep 16, 2007
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