Autoradiographic distribution of vasoactive intestinal polypeptide receptors in rabbit and rat small intestine

Hassan Sayadi, John W. Harmon, Terry W. Moody, Louis Y. Korman

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Vasoactive intestinal peptide (VIP) is found in the enteric nervous system of all layers of the small intestine. In the gastrointestinal tract, VIP receptors coupled to adenylate cyclase are present on epithelial, smooth muscle and possibly mononuclear cells. This study analyzes the distribution of VIP binding using in vitro autoradiographic techniques. VIP binding was present in high density in the mucosal layer of rabbit duodenum, jejunum and ileum. Low VIP binding was noted over the smooth muscle layers or the lymphoid follicles. Similar results were obtained in rat small intestine. The density of VIP binding was greatest in duodenal mucosa but was present in lower density in jejunal and ileal mucosa. Again, low VIP binding was noted in the smooth muscle layers or lymphoid follicles. Thus, autoradiographic maps of small intestine indicate that VIP receptors are found primarily in the small intestinal mucosa.

Original languageEnglish (US)
Pages (from-to)23-30
Number of pages8
Issue number1
StatePublished - 1988
Externally publishedYes


  • Autoradiography
  • Binding
  • Lymphoid tissue
  • Mucosa
  • Small intestine
  • Smooth muscle
  • Vasoactive intestinal peptide (VIP)

ASJC Scopus subject areas

  • Biochemistry
  • Physiology
  • Endocrinology
  • Cellular and Molecular Neuroscience


Dive into the research topics of 'Autoradiographic distribution of vasoactive intestinal polypeptide receptors in rabbit and rat small intestine'. Together they form a unique fingerprint.

Cite this