Abstract

Evidence is accumulating rapidly to support the concept that specific receptors for certain neuropeptides on lymphocytes may provide a means through which neurophysiological signals can influence immunological processes. Human lymphoid cells have been reported to have receptors for beta-endorphin (1), somatostatin (2), substance P (3), and vasoactive intestinal peptide (4), and a variety of investigations suggest that each of these neuropeptides can affect the behaviour of human lymphocytes in vitro. It has also been proposed that neurophysiological factors could have an important impact on the immune system in vivo by regulating the migration of lymphocytes through lymphoid tissue (5,6). This paper concerns experiments that were performed to test the hypothesis that receptors for the neuropeptide vasoactive intestinal peptide (VIP) influence the migration of T cells.

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