Distribution of Methionine-Enkephalin-Like and FMRFamide-Like Immunoreactivities in the Central Nervous System (Including Dorsal Bodies) of the Snail Helix aspersa Muller(Endocrinology)

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We investigated the immunocyto-localization of methonine-enkephalin and of FMRFa-mide in the central nervous system and in the dorsal bodies of adult snails Helix, aspersa. The results summarized on maps demonstrate that: 1) Methionine-enkephalin- and FMRFamide-like substances are detected in many neurons of all ganglia. They are never colocalized. 2) The areas of supra- and subesophageal methionine-enkephalin positive dorsal bodies are innervated by a network of FMRFamide positive fibers, which contain immunogold positive granules and establish close contacts with the dorsal-body cells. The extensive distribution of methionine-enkephalin- and FMRFamide fibers and cells of various sizes suggests that these peptides play different functions in the nervous system. A special attention is paid to the control of the dorsal bodies according to previous functional results.
社団法人日本動物学会の論文
1991-10-15