Neurotransmitters Envisaged as Controllers of Stem Cell Activity

Adult, or somatic, stem cells support surrounding tissues by delivering a supply of daughter somatic cells, ready to replace those lost over time. This stem cell activity declines with age, and in the best studied stem cell populations this appears to be more a matter of signaling than a matter of inherent dysfunction. Stem cells react to rising levels of damage in tissues, or rather to the changes in signaling that result from that damage. Old stem cells put into a young environment perform as well as their younger counterparts. This decline with age may have evolved to limit cancer risk, but it brings the certainty of a slow decline into organ failure. Many research groups are searching for the signals responsible for adjusting stem cell activity. The scientists here demonstrate that the autonomic nervous system makes important contributions to this signaling environment, and thus specific neurotransmitters may be a useful target for therapies to suppress or enhance stem cell function in various contexts. When it comes to aging, the function of the autonomic nervous system is known to change in later life, but more work is needed to solidify how this new research fits in to the bigger picture. Somatic stem cells are microscopic workhorses, constantly regenerating cells throughout the body: skin and the lining of the intestine, for example. Researchers have demonstrated for the first time that stem cell proliferation is directly controlled by the autonomic ne...
Source: Fight Aging! - Category: Research Authors: Tags: Daily News Source Type: blogs