Ultrastructure of rat pinealocytes in vitro: influence of gonadotropic hormones and LH-RH.
The influence of gonadotropic hormones on the ultrastructure of rat pinealocytesin short-term organ culture was studied. Human chorionic gonadotropin (HCG), as well as pregnant mare serum gonadotropin (PMSG), caused a marked activation of pinealocytes. An hypothesis is discussed implying the presence of a feedback mechanism between the pineal organ and the hypothalamo-hypophysial system.
D000818:Animals; D006063:Chorionic Gonadotropin / Q000494:pharmacology*; D007987:Gonadotropin-Releasing Hormone / Q000494:pharmacology*; D006064:Gonadotropins, Equine / Q000494:pharmacology*; D008297:Male; D008928:Mitochondria / Q000648:ultrastructure; D009924:Organ Culture Techniques; D010870:Pineal Gland / Q000648:ultrastructure*; D051381:Rats
D006063:Chorionic Gonadotropin; D006064:Gonadotropins, Equine; D007987:Gonadotropin-Releasing Hormone