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Selective colocalization of immunoreactivity for intracellular gonadal hormone receptors and tyrosine hydroxylase in the ventral tegmental area, substantia nigra, and retrorubral fields in the rat

Gonadal hormones influence brain functions, including motor and motivational behaviors, transmitter release, and receptor binding in midbrain dopamine systems. Much of this influence suggests genomic hormone action. To identify which midbrain cells may be targets of genomic influence, double label immunocytochemistry was used to map intracellular estrogen and androgen receptors and tyrosine hydroxylase (TH) in the ventral tegmental area (VTA), substantia nigra (SN), and retrorubral fields (RRF) in intact, adult rats.