ScienceDaily: Biotechnology News

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• Researchers identify signals triggering dendrite growth
• Epigenetic changes often don’t last, probably have limited effects on long-term evolution, research finds
• Spiral constriction: How dynamin mediates cellular nutrient uptake
• Human body rids itself of damage when it really matters
• Plant miRNAs could enter host blood and tissues via food intake, study suggests

Researchers identify signals triggering dendrite growth Posted: 20 Sep 2011 02:33 PM PDT A study in worms that are less than a millimeter long has yielded clues that may be important for understanding how nerves grow. A team of researchers in Australia has probed the molecular mechanisms which prompt the development of dendrites, in the nematode Caenorhabditis elegans.

Epigenetic changes often don’t last, probably have limited effects on long-term evolution, research finds Posted: 20 Sep 2011 10:26 AM PDT The first comprehensive inventory of epigenetic changes over several generations shows that these often do not last and therefore probably have limited effects on long-term evolution, according to scientist in Germany.

Spiral constriction: How dynamin mediates cellular nutrient uptake Posted: 20 Sep 2011 07:38 AM PDT Researchers have determined the molecular structure of dynamin -- a "wire-puller" that mediates nutrient uptake into the cell. Since pathogens such as HIV can also enter the body's cells in this way, understanding the underlying molecular mechanisms can potentially open up new approaches for medical applications.

Human body rids itself of damage when it really matters Posted: 20 Sep 2011 04:55 AM PDT Although the body is constantly replacing cells and cell constituents, damage and imperfections accumulate over time. Cleanup efforts are saved for when it really matters. Researchers in Sweden are able to show how the body rids itself of damage when it is time to reproduce and create new life.

Plant miRNAs could enter host blood and tissues via food intake, study suggests Posted: 19 Sep 2011 04:42 AM PDT In a new study, researchers in China present a rather striking finding: that plant miRNAs could make it into the host blood and tissues via the route of food intake. Moreover, once inside the host, they can elicit functions by regulating host 'target' genes and thus regulate host physiology.

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