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Demonstration of dopamine-immunoreactive cells in the gastrointestinal tract of gerbils (Meriones unguiculatus)

RR Dawirs, G Teuchert-Noodt and WU Kampen

Department of Neuroanatomy, Faculty of Biology, University of Bielefeld, Germany.

We investigated dopamine immunoreactivity in the small intestine of gerbils (Meriones unguiculatus), using a sensitive and selective antibody against glutaraldehyde-conjugated dopamine. Dopamine- immunoreactive cells were found within the mucosal epithelium along the entire extent of the small intestine. Labeled cells were regularly distributed in the upper half of the intestinal villi, basally attached to the basement membrane and always reaching as far as the epithelial surface. Dopamine-containing cells revealed a spindle-like shape, and both light and electron microscopic characteristics relate them to typical open-type gut endocrine cells. Thus, this current study directly identified dopamine as a probable secretory product in basal granulated cells of the small intestine. The functional significance of these cells is discussed in relation to the current view of dopaminergic actions in peripheral tissues.

Volume 40, Issue 8, pp. 1197-1201, 08/01/1992
Copyright © 1992 by The Histochemical Society


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