PT - JOURNAL ARTICLE AU - ROBERT A. MUELLER AU - HANS THOENEN AU - JULIUS AXELROD TI - Inhibition of Trans-synaptically Increased Tyrosine Hydroxylase Activity by Cycloheximide and Actinomycin D DP - 1969 Sep 01 TA - Molecular Pharmacology PG - 463--469 VI - 5 IP - 5 4099 - http://molpharm.aspetjournals.org/content/5/5/463.short 4100 - http://molpharm.aspetjournals.org/content/5/5/463.full SO - Mol Pharmacol1969 Sep 01; 5 AB - Reserpine produces a neurally mediated increase in tyrosine hydroxylase activity in the adrenal medullae and sympathetic ganglia of the rat. This increase in enzyme activity can be prevented by the administration of actinomycin D or cycloheximide. These results suggest that the synthesis of tyrosine hydroxylase is regulated either by changes in the release or turnover of catecholamines, or by the direct effect of a neurotransmitter. Reserpine increases the incorporation of 3H-leucine into hepatic and adrenal protein, and this incorporation is inhibited by a dose of cycloheximide that prevents the reserpine-initiated increase in tyrosine hydroxylase activity.