CUTANEOUS INNERVATION AND THE ROLE OF NEURONAL PEPTIDES IN CUTANEOUS INFLAMMATION - A MINIREVIEW

Noxious stimuli may directly activate peripheral nerve endings of prim ary sensory neurons. Such impulses are conveyed centrally as well as, through antidromic axon-reflexes, peripherally where they release pro- inflammatory neuropeptides that cause the set of changes collectively referred to as ''neurogenic inflammation''. These peptides are able to regulate cutaneous inflammatory processes. Thus, for instance, quanti tative variations in cutaneous levels of some neuropeptides, such as c alcitonin gene-related peptide, neuropeptide Y, substance P, vasoactiv e intestinal polypeptide, neurokinin A and somatostatin, have been fou nd in lesional skin in a number of dermatoses. In addition, they may a lso serve as selective markers of nerve fiber degeneration and regener ation, and they can also act as trophic agents.