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南方鲶1龄幼鱼促性腺激素(GTH)分泌调节研究表明:南方鲶幼鱼GTH的释放受到促性腺激素释放激素(GnRH)和多巴胺(DA)的双重调控,但DA不能抑制基础的GTH释放,而只能抑制GnRH刺激的GTH释放,DA对GTH的释放抑制作用是间接通过GnRH实现的.这与研究过的鲤科鱼类不同,而与研究过的其它鲶形目鱼类相似.注射人绒毛膜促性腺激素(hCG)后南方鲶血清GTH水平上升,hCG促使血液GTH水平升高可能与hCG与非洲鲶促性腺激素抗体具有一定的交叉免疫反应有关.hCG与促黄体释放激素类似物(LHRH A)结合注射后血清GTH水平也显著高于单独注射hCG或LHRH A后的血清GTH水平,这种升高可能来源于外源GTH(hCG)和LHRH A刺激脑垂体分泌的内源GTH.
The regulation of gonadotropin (GTH) secretion in juvenile southern catfish (Ictalurus punctatus) shows that the release of GTH from juvenile southern catfish is double regulated by gonadotropin-releasing hormone (GnRH) and dopamine (DA), but DA can not inhibit the basic GTH release , But only GnRH-stimulated GTH release, and the inhibition of GTH release by DA is indirectly via GnRH, which is different from the carp species studied but similar to the other studied fishes Human chorionic gonadotropin (hCG) serum levels of GTH in southern catfish increased hCG promote blood GTH levels may be related to hCG and African catfish gonadotropin antibodies have a certain cross-immune response.HCG and luteinizing hormone releasing hormone analogues (LHRH A) also significantly increased serum GTH levels after injection of hCG or LHRH A serum GTH levels, this increase may be derived from exogenous GTH (hCG) and LHRH A stimulation of pituitary secretion of endogenous GTH .