Damaged rat peripheral nerves do not contain detectable amounts of ?-MSH
JOURNAL OF NEUROSCIENCE RESEARCH(1988)
Abstract
Peptides related to alpha-MSH (collectively termed melanocortins) stimulate nerve growth following injury and may play a physiological role in the repair process. Melanocortins are not normally present in mature peripheral nerves but MSH-like bioactivity has been observed in extracts of injured nerves. alpha-MSH could derive from reexpression of the POMC prohormone in injured nerves or from proteolysis of the intermediate-size neurofilament protein that bears antigenic similarities to melanocortins. Using a radioimmunoassay that will distinguish between alpha-MSH and neurofilament-derived fragments, we have shown that alpha-MSH is not present (detection limit 74 pg alpha-MSH/mg protein) in damaged rat sciatic nerves.
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Key words
peripheral nerves,rat
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