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  • Title: [Effect of ACTH and glucocorticoids on plasma prolactin levels in the male rat].
    Author: López-Calderón A, Esquifino AI, Tresguerres JA.
    Journal: Rev Esp Fisiol; 1984 Dec; 40(4):483-8. PubMed ID: 6099599.
    Abstract:
    Relationships between prolactin and adrenal secretion were studied in the adult male rat by different experimental approaches. Administration of a long acting 1-24 ACTH preparation during 11 days induced a significant decrease in plasma prolactin levels. Adrenalectomy on the contrary resulted in an increase of prolactin levels that were not affected by ACTH treatment. Dexamethasone administration to intact or adrenalectomized animals resulted in a significant reduction of plasma prolactin in both cases. In order to elucidate if the inhibitory effect of the adrenal stimulation on prolactin was mediated through the blockade of endogenous ACTH, stimulation of hypothalamic-pituitary-adrenal axis with chronic intermittent immobilization stress was performed. Stress induced a significant elevation in plasma corticosterone levels, together with a decrease in prolactin values. These data indicated that the inhibitory role of ACTH and stress on prolactin secretion was mediated through the adrenal glucocorticoid stimulation.
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