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Science News for August 22, 2004


In gene regulation, small is beautiful

Researchers create synthetic transcription factors, mimicking natural regulators to probe gene regulation and explore new treatment approaches. The artificial activation domains developed in Mapp's lab were as effective as a natural activation domain at turning on genes.

SourceUniversity of Michigan·DateAug 22, 2004
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Why damaged DNA gets a case of the bends

A recent simulation study revealed that damaged DNA becomes more susceptible to bending due to a reorganization of its sugar-phosphate backbone. This change allows the molecule to bend easily, which is recognized by enzymes as a damaged site.

SourceDOE/Pacific Northwest National Laboratory·DateAug 22, 2004

Taking charge of molecular wires

Researchers have developed a new method to enhance the conductivity of polymer nanowires by injecting extra negative or positive charges using high-energy electrons. This allows for the observation of charge movement across the wire, a key step toward developing good conductors.

SourceDOE/Brookhaven National Laboratory·DateAug 22, 2004

Breakthrough in understanding of hereditary disease of lymphatic vessels

A study from the Ludwig Institute for Cancer Research has uncovered a fundamental mechanism of lymphatic vessel formation, revealing abnormally shaped vessels covered in smooth muscle cells. The findings may lead to better treatments for lymphedema, which affects people worldwide and can be inherited or caused by tumor removal.

SourceLudwig Institute for Cancer Research·JournalNature Medicine·DateAug 22, 2004
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Scraps of prehistoric fabric provide a view of ancient life

Textile researchers are uncovering secrets about ancient lives through chemical and physical analysis. Fragments of prehistoric fabric provide clues about the status, wealth, and cultural practices of individuals buried in North American archaeological sites. By studying these textiles, experts can gain a deeper understanding of the te...

SourceOhio State University·DateAug 22, 2004

Eyewitness recall accuracy affected by mood - UNSW research

Researchers found that individuals in a positive mood tend to have unreliable memories and poor critical thinking skills, while those in a negative mood provide more accurate eyewitness accounts. In contrast, a negative mood state triggers more systematic information processing, leading to superior thinking and communication skills.

SourceUniversity of New South Wales·JournalJournal of Experimental Social Psychology·DateAug 22, 2004

Penn scientists identify novel pathway in aneurysms

Researchers discovered a link between aneurysm formation and the activation of an asthma inflammation gene. Blocking this pathway may prevent or slow aneurysm progression, potentially using anti-inflammatory drugs used in cardiovascular disease treatment.

SourceUniversity of Pennsylvania School of Medicine·JournalNature Medicine·DateAug 22, 2004
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New class of compounds promises to revive failing hearts

Researchers at Johns Hopkins University have developed a new class of nitroxyl-releasing compounds that seem to strengthen cardiac contractions and relaxation in dogs with heart failure. These compounds, which produce nitric oxide (HNO), have shown promising results in early studies.

SourceJohns Hopkins University·DateAug 22, 2004

U of T study identifies possible stem cells in pancreas

A University of Toronto study discovered precursor cells within the adult pancreas that can make new pancreatic cells, potentially providing a plentiful supply of beta cells for transplant treatments. The research also found that these cells can generate both beta cells and neurons, challenging existing dogma on development.

SourceUniversity of Toronto·JournalNature Biotechnology·DateAug 22, 2004