PMID: 7536334Dec 15, 1994Paper

Immunohistochemical localization of peptidergic nerve fibers and neuropeptide receptors in Peyer's patches of the cat ileum

Regulatory Peptides
S IchikawaR L Owen

Abstract

This study examined the distribution of peptidergic nerve fibers in Peyer's patches to determine whether appropriate receptors were present. Vasoactive intestinal peptide (VIP), substance P (SP), calcitonin gene-related peptide (CGRP) and receptors for VIP and SP were localized in lymphoid follicles of the cat ileum using a combined indirect horseradish peroxidase and streptavidin-biotin method. The margins of follicles were innervated by nerve fibers containing VIP, SP and CGRP. Nerve fibers were predominantly around lymphatics and high endothelial venules at the edges of follicles. Specific receptors for VIP and SP were present at the margins of follicles and in the lamina propria around crypts. VIP receptors were numerous on T cells within and around high endothelial venules and lymphatic vessels and at the margins of follicles. SP receptors were identified on a small number of T and B cells, granulocytes and macrophages, restricted to the margins of follicles. The defined distribution in ileal lymphoid tissue of nerve fibers containing VIP and SP and the corresponding localization of their appropriate receptors support immunoregulatory roles for neuropeptides in mucosal immunity.

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Citations

Nov 1, 1994·Immunology Today·C A Ottaway, A J Husband
Jan 1, 1996·Advances in Neuroimmunology·D L BellingerD L Felten
Jan 1, 1997·Inflammatory Bowel Diseases·M ReinshagenV E Eysselein
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