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  • Title: Regulation of methionine-enkephalin precursor messenger RNA in rat striatum by haloperidol and lithium.
    Author: Sabol SL, Yoshikawa K, Hong JS.
    Journal: Biochem Biophys Res Commun; 1983 Jun 15; 113(2):391-9. PubMed ID: 6688178.
    Abstract:
    Daily injections of rats with haloperidol for 21 days or lithium chloride for 5 days elevated the content of Met-enkephalin in the striatum by 86% or 66%, respectively. Poly(A)+ RNA from striata of drug-treated and control rats was translated in vitro, and the amount of synthesized enkephalin precursor [35S]preproenkephalin A was determined by immunoprecipitation and SDS-polyacrylamide gel electrophoresis. Haloperidol or lithium treatment increased the relative amount of preproenkephalin A synthesized by 67-98% or 25-29%, respectively. These results suggest that haloperidol elevates the Met-enkephalin content primarily by increasing the precursor mRNA content or activity, while lithium exerts its effect only in part by this mechanism.
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