Staines W A, Yamamoto T, Daddona P E, Nagy J I
Neurosci Lett. 1986 Sep 25;70(1):1-5. doi: 10.1016/0304-3940(86)90427-1.
Neurons of the posterior hypothalamic magnocellular nucleus (PHMN) in the rat are immunoreactive for adenosine deaminase (ADA) and cells coextensive with this nucleus show immunoreactivity for serotonin after pretreatment with 5-hydroxytryptophan (5-HTP). The degree to which ADA coexists in cells having 5-HTP uptake capability was analyzed by a new double immunohistofluorescence procedure employing diethylaminocoumarin (DAMC). It was determined that 5-HTP accumulating cells of the PHMN represent a subpopulation of those immunoreactive for ADA. These results add further to the neurochemical characterization of this globally projecting hypothalamic cell group and point out the utility of DAMC as a new immunohistofluorescence marker.