FMRFamide-like immunoreactivity in the nervous system of Hydra

C J Grimmelikhuijzen, G J Dockray, L P Schot

79 Citations (Scopus)

Abstract

FMRFamide-like immunoreactivity has been localized in different parts of the hydra nervous system. Immunoreactivity occurs in nerve perikarya and processes in the ectoderm of the lower peduncle region near the basal disk, in the ectoderm of the hypostome and in the ectoderm of the tentacles. The immunoreactive nerve perikarya in the lower peduncle region form ganglion-like structures. Radioimmunoassays of extracts of hydra gave displacement curves parallel to standard FMRFamide and values of at least 8 pmol/gram wet weight of FMRFamide-like immunoreactivity. The immunoreactive material eluted from Sephadex G-50 in several components emerging shortly before or after position of authentic FMRFamide. The presence of FMRFamide-like material in coelenterates shows that this family of peptides is of great antiquity.
Original languageEnglish
JournalHistochemistry
Volume73
Issue number4
Pages (from-to)499-508
Number of pages10
ISSN0301-5564
Publication statusPublished - 1 Jan 1982

Keywords

  • Animals
  • FMRFamide
  • Fluorescent Antibody Technique
  • Hydra
  • Nervous System
  • Oligopeptides
  • Radioimmunoassay

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