title: Comparison of androgen biosynthesis in isolated leydig cells from rat and mouse testis: incubation and superfusion studies.
abstract: Production of testosterone by highly purified Leydig cells prepared from rat and mouse testes is compared. Testosterone formation is improved to a higher degree in rat (2.7-fold) than in mouse (1.7-fold) cells by collagenase treatment of the testis compared with mechanical isolation. Mouse Leydig cells respond to exogenous stimuli (choriogonadotropin, dibutyryl cyclic AMP) with 2.4-fold higher testosterone secretion than rat cells. A 1.7-fold increased conversion of androgen precursors to testosterone by mouse compared with rat Leydig cells is demonstrated in static incubations as well as in steady-state superfusion experiments and can be derived from enhanced androstenedione reduction and a less inhibitory effect of progesterone on this process in mouse Leydig cells.
mesh_terms: D000728:Androgens / Q000096:biosynthesis*; D000735:Androstenedione / Q000378:metabolism; D000818:Animals; D003994:Bucladesine / Q000494:pharmacology; D006063:Chorionic Gonadotropin / Q000494:pharmacology; D066298:In Vitro Techniques; D007985:Leydig Cells / Q000187:drug effects / Q000378:metabolism*; D008297:Male; D051379:Mice; D003012:Microbial Collagenase / Q000494:pharmacology; D011374:Progesterone / Q000378:metabolism; D051381:Rats; D013739:Testosterone / Q000096:biosynthesis
chemical_list: D000728:Androgens; D006063:Chorionic Gonadotropin; D013739:Testosterone; D000735:Androstenedione; D011374:Progesterone; D003994:Bucladesine; D003012:Microbial Collagenase