Antiprogesterone and antiglucocorticoid actions of RU 486 on rabbit mammary gland explant cultures. Evidence for a persistent inhibitory action of residual progesterone upon the mammary tissue.

Abstract

The antiprogesterone and antiglucocorticoid compound RU 486 added to pregnant rabbit mammary gland explant cultures had no effect alone but significantly stimulated casein production in the presence of ovine prolactin (PRL) in a dose dependent manner. This stimulation was inhibited by progesterone (Pg) and the Pg agonist R5020. When the explants were… (More)

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