Innervation of the dorsal body cells of Helix aspersa: Immunocytochemical evidence for the presence of FMRF amidelike substances in nerves and synapses.
In Helix aspersa, single axons or small nerves make synapse-like structures (SLS) with dorsal body (DB) cells. The present immunocytochemical study performed on the DB-containing connective tissue located around the cerebral commissure reveals the presence of FMRFamide-like substances in many nerves of this DB area. The immunogold method coupled with electron microscopy show that among the four observed axon types, only one, containing 95-110 nm granules, is positive for FMRFamide and that most of the SLS between axons and DB cells contain the same immunoreactive granule types. The results support the previously suggested role of FMRFamide-like peptides in the nervous control of DB cells.
Griffond
B
B
Laboratoire de Zoologie et Embryologie, UFR des Sciences et des Techniques de Besançon, Place Maréchal Leclerc, 25030 Besançon Cedex, France.
Mounzih
K
K