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  • Title: Distribution of enkephalin-immunoreactive cell bodies in relation to serotonin-containing neurons in the raphe nuclei of the cat: immunohistochemical evidence for the coexistence of enkephalins and serotonin in certain cells.
    Author: Léger L, Charnay Y, Dubois PM, Jouvet M.
    Journal: Brain Res; 1986 Jan 01; 362(1):63-73. PubMed ID: 3942868.
    Abstract:
    In this study we have examined the distribution of enkephalin-like immunoreactive (ELI) cell bodies in the cat raphe nuclei pallidus (NRP), obscurus (NRO), magnus (NRM), pontis and dorsalis (NRD) after intraventricular administration of colchicine. All the raphe nuclei examined were observed to contain ELI cell bodies along their whole caudorostral extent. By comparing consecutive sections treated separately with anti-5-HT and enkephalin-antiserum it was observed that certain 5-HT cells in each raphe nucleus contain ELI material. A quantitative estimation was attempted. In NRP and NRO approximately half of the total immunoreactive neuronal population appeared to be immunoreactive for both 5-HT and the enkephalins. In NRM the proportion would be one-third, whereas it seemed almost negligible in NRD. Among the 5-HT cells, approximately two-thirds might be ELI in NRP and NRO, and one-half in NRM.
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