Immunohistochemical mapping of galanin-like immunoreactivity in the brain of the dogfish Scyliorhinus canicula.
The distribution of galanin-like immunoreactivity in the brain of the dogfish Scyliorhinus canicula was investigated using the indirect immunofluorescence technique. In the telencephalon, positive cells and fibers were located in the mid-caudal part of the area superficialis basalis, the n. septi caudoventralis and in the n. interstitialis commissurae anterioris. Most of the galanin-containing neurons observed in the hypothalamus were located in the magnocellular preoptic nucleus. Positive perikarya were also found in the n. lobi lateralis hypothalami and in the n. lateralis tuberis. A dense network of positive nerve processes was noted in the caudal part of the median eminence. In the dorso-caudal part of the diencephalon numerous immunoreactive neurons were seen in the recessus posterioris. A large bundle of galanin-containing fibers, which divided in two branches, was observed in the basal midbrain tegmentum. The widespread distribution of galanin-like material suggests that, in the dogfish, galanin may be involved in various brain functions including neuroendocrine regulations.
Vallarino
M
M
Institute of Comparative Anatomy, University of Genova, Italy.
Feuilloley
M
M
Vandesande
F
F
Vaudry
H
H
D000818:Animals; D001921:Brain / Q000033:anatomy & histology / Q000378:metabolism*; D004284:Dogfish / Q000378:metabolism*; D005260:Female; D005455:Fluorescent Antibody Technique; D019004:Galanin; D007031:Hypothalamus / Q000378:metabolism; D007150:Immunohistochemistry; D008297:Male; D009474:Neurons / Q000378:metabolism; D009479:Neuropeptides / Q000378:metabolism*; D010455:Peptides / Q000378:metabolism*; D011301:Preoptic Area / Q000378:metabolism; D014018:Tissue Distribution
D009479:Neuropeptides; D010455:Peptides; D019004:Galanin