[Synaptic contacts between SIF cells immunoreactive to cholecystokinin (CCK-8) in inferior mesenteric ganglia in the guinea-pig]. / Contacts synaptiques entre cellules SIF immunoréactives à la cholécystokinine (CCK-8) dans le ganglion mésentérique inférieur du cobaye.

ABSTRACT

Cell bodies and processes of SIF cells were found to be CCK-like immunoreactive within the mesenteric ganglion of the guinea-pig. Immunoreactivity was contained in granular vesicles, the labeling being chiefly associated with granules, about 100 nm in diameter. Asymmetric synaptic contacts between CCK-like immunoreactive SIF cells have been identified and a possible functional implication regarding intraganglionic connections for these SIF cells is discussed.