Serotonin and NADPH-diaphorase in the dorsal raphe nucleus of the adult rat.


NADPH-diaphorase histochemistry, employed as a marker for nitric oxide synthase (NOS), was combined with serotonin (5-HT) immunofluorescence to investigate the relationship between NOS and 5-HT in the rat dorsal raphe nucleus. Many NADPH-diaphorase labelled cells and varicose axons were observed in the nucleus. Coexistence between NADPH-diaphorase and 5-HT… (More)