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FMRFamide-like immunoreactivity in the nervous system of Hydra

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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.
OriginalsprogEngelsk
TidsskriftHistochemistry
Vol/bind73
Udgave nummer4
Sider (fra-til)499-508
Antal sider10
ISSN0301-5564
StatusUdgivet - 1 jan. 1982

ID: 33514820