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      Endothelium of Human Umbilical Blood Vessels: Ultrastructural Immunolocalization of Neuropeptides

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          Abstract

          Endothelial cells of human umbilical vein and artery, both in situ and in culture, were examined ultrastructurally and at the light-microscope level using either the pre-embedding peroxidase-antiperoxidase or avidin-biotin peroxidase complex immunostaining techniques. Vasoactive intestinal polypeptide (VIP), substance P (SP), calcitonin gene-related peptide (CGRP) and arginine-vasopressin (AVP) immunoreactivity were localized in subpopulations of endothelial cells of the term umbilical vein and artery. The percentage of VIP-, SP-, CGRP- and AVP-immunoreactive cells in the umbilical vein was 12, 10, 11, and 7.5%, respectively, out of a total of 5,364 cells (from 15 umbilical cords) examined. The artery contained fewer VIP-, SP-, and CGRP-immunoreactive cells, but more AVP-immunoreactive cells, than the vein. In conclusion, subpopulations of endothelial cells in the human umbilical vein and artery contain the neuropeptides VIP, SP, CGRP and AVP, although their physiological roles are not yet known.

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          Author and article information

          Journal
          JVR
          J Vasc Res
          10.1159/issn.1018-1172
          Journal of Vascular Research
          S. Karger AG
          1018-1172
          1423-0135
          1993
          1993
          23 September 2008
          : 30
          : 6
          : 348-355
          Affiliations
          Department of Anatomy and Developmental Biology, Centre for Neuroscience, University College London, London, UK
          Article
          159017 J Vasc Res 1993;30:348–355
          10.1159/000159017
          7694667
          © 1993 S. Karger AG, Basel

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          Page count
          Pages: 8
          Categories
          Research Paper

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