Aminergic, Cholinergic and Peptidergic Innervation of Hepatic Portal Vein in the Anuran Amphibians : Physiology

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概要

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• The innervation of the hepatic portal vein in four species of anuran amphibians, Rana catesbeiana, Xenopus laevis, Rana nigromaculata, Bufo japonicus, was studied using catecholamine fluorescence, acetylcholinesterase and immunohistochemical methods. The hepatic portal vein of the anuran amphibians was well supplied with aminergic nerve fibers (Amn) and they appeared equally developed in all regions of the hepatic portal vein in all of the animals examined. Abundant Amn were observed in the gastrointestinal vein of X. laevis. In contrast to Amn, the hepatic portal vein of the amphibians had a sparse perivascular plexus of cholinergic nerve fibers (Chn) and fewer Chn were present in the pre-abdominal vein than in the gastrointestinal vein. The gastrointestinal vein in R. catesbeiana was innervated moderately by Chn. And no acetylcholinesterase activity positive fiber was found in the pre-abdominal vein in X. laevis and B, japonicus. Substance P (SP)-, neurokinin A (NKA)- and calcitonin gene-related peptide (CGRP)-like immunoreactive (LI) fibers were observed in the hepatic portal vein in all of the animals examined. The gastrointestinal vein in R. catesbeiana and X. laevis was especially richly innervated. Only a very few vasoactive intestinal polypeptide (VIP)-LI fibers associated with the gastrointestinal vein were found in R, catesbeiana. However, in other species, almost no VIP-LI fibers were observed. In the gastrointestinal veins in all of the amphibians examined, large bundles of nerves, often parallel to the course of the vein, were observed together with networks of thin nerve fibers.

• 社団法人日本動物学会の論文
• 1990-08-15

著者

• TAGAWA TAKASUKE

  Department of Anatomy, Fukuoka University School of Medicine

• Tagawa T

  Fukuoka Univ. Fukuoka Jpn

• Tagawa Takasuke

  Department Of Anatomy Fukuoka University School Of Medicine

• Okamoto Kiyoshi

  Department Of Anatomy Fukuoka University School Of Medicine

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