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First visualization of dopaminergic neurons with a monoclonal antibody to dopamine: a light and electron microscopic study

C Decavel, L Lescaudron, N Mons and A Calas

Laboratoire de Physiologie des Interactions Cellulaires, UA CNRS 339, Talence, France.

A monoclonal antibody recently synthesized against dopamine (DA) was tested in rat and mouse brain sections after further treatment by PAP immunocytochemistry at the light and electron microscopic levels. Distribution of DA-immunoreactive cell bodies was examined in the substantia nigra (sn), the ventral tegmental area (vta), and the raphe nuclei. DA-immunoreactive fibers were investigated in two DA projection systems, the striatum and the septum. Many dopaminergic cell bodies were found in the sn and the vta. Some scattered DA neurons were encountered in the pars reticulata of the sn. The dorsal raphe and linearis raphe nuclei displayed sparse immunoreactive neurons and a dense plexus of DA fibers. Immunoreactive fibers were observed in the entire striatum, more dense in the ventral part. In the septum, immunonegative neurons were outlined by thin DA fibers in synaptic contact with their somata or dendrites. According to our observations, this DA monoclonal antibody seems to be a selective and sensitive tool for studying the dopaminergic neuronal circuitry at both histological and ultrastructural level.

Volume 35, Issue 11, pp. 1245-1251, 11/01/1987
Copyright © 1987 by The Histochemical Society


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