1 Département de Médecine Expérimentale, Faculté de Médecine, Université Claude Bernard, Lyon, France
2 Institut de Biochimie Cellulaire et Neurochimie, C.N.R.S., Université de Bordeaux II, Bordeaux, France
Abstract:
We demonstrated the presence of 5-hydroxytryptophan (5-HTP), the immediate precursor of serotonin (5-HT), in the rat brain tissue using a glutaraldehyde-coupled immunohistochemical technique. The immunoreactivity of 5-HTP was intensified in the colchicine-pretreated rat. The distribution of labelled cells was the same as for 5-HT-immunoreactive cells, but they were fewer in number.