Abstract
The changes in striatal dopamine receptor sensitivity and/or density following the administration of estrogen are dependent upon both the dose of the hormone and the time post-injection (Gordon, 1980). Classically the modulatory effects of estrogen on behavior, in the rat, require 18-24 hours from the time of hormone administration before they are expressed (Harlan et al., 1979). This delay is thought to represent the estrogen-induced synthesis and/or axonal transport of specific proteins in the central nervous system (CNS). Using this time frame (i.e. 24 hours post-injection), several investigators have demonstrated a down-regulation or desensitization of striatal dopamine receptors following estrogen administration (Bedard et al., 1978; Euvrard et al., 1979; Gordon, 1980; Gordon et al., 1980). However, longer periods of time (i.e. 48 hours or longer post-injection) result in an up-regulation of striatal dopamine receptors. It should be noted however, that this up-regulation is seen only following the administration of high doses of estrogen (Chiodo et al., 1979; Gordon, 1980; Hruska and Silbergeld, 1980; Nausieda et al., 1979)
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Clopton, J.K., Gordon, J.H. (1986). Separate Molecular Mechanisms for Estrogen-induced Up- and Down-regulation of Striatal Dopamine Receptors. In: Woodruff, G.N., Poat, J.A., Roberts, P.J. (eds) Dopaminergic Systems and their Regulation. Satellite Symposia of the IUPHAR 9th International Congress of Pharmacology. Palgrave Macmillan, London. https://doi.org/10.1007/978-1-349-07431-0_20
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DOI: https://doi.org/10.1007/978-1-349-07431-0_20
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