Metabolism of testosterone sulfate in the rat: analysis of biliary metabolites

In vitro effects of androgens upon the spontaneous rat uterine contractility

The effectiveness of ring A reduced (5 alpha and 5 beta) testosterone (T) derivatives upon the rat uterus spontaneous contractility was tested in vitro. Compounds with the 3 alpha-hydroxy-5 alpha reduced configuration, such as androsterone and androstanediol, and one 5 beta reduced (5 beta-dihydrotestosterone) elicited a remarkable inhibitory effect upon the myometrial activity. Although steroids with 5 beta reduction were less potent than 3 alpha-hydroxy-5 alpha reduced compounds for depressing the myometrial activity, they were somewhat more potent than T, DHEA, androstenedione and the remaining 5 alpha reduced compounds tested. Therefore, T could act as a "prehormone", accounting for the maintenance of the physiological myometrial activity through its 5-reduced derivatives.

Different effects of synthetic delta 9-tetrahydrocannabinol and cannabis extract on steroid metabolism in male rats

Repeated oral administration of cannabis extract as well as synthetic delta9-tetrahydrocannabinol to male rats produced significant changes in excretion of androgenic steroids and their metabolites as detectable in blood and urine. Cannabis extracts were found to be significantly more active than the mixtures containing same amounts of synthetic cannabinoids.