Close Association of Peptidergic Nerves with Lymphocytes in Canine and Monkey Ileal Villi
1992
: Intimate association of peptidergic nerves with lymphocytes of canine and monkey ileal villi was demonstrated by immunohistochemistry and transmission electron microscopy. A swollen, presumably terminal, portion of nerves containing large cored vesicles and small clear vesicles was in direct contact with a lymphocyte. The apposing membranes of the nerve and lymphocyte were thickened and darkened, being separated by a narrow uniform space. The lymphocyte-associated nerves contained immunoreactivity for substance P(SP), calcitonin gene-related peptide (CGRP) or vasoactive intestinal polypeptide (VIP), localized in large-cored vessels. These result support the hypothesis that peptidergic nerves may play a regulatory role in mucosal immune responses.
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