人胎盘的生殖内分泌学研究——Ⅲ.妊娠早期人滋养层组织孕酮分泌的调节

在体外无血清培养条件下,低剂量的促黄体素释放激素(GnRH)(10~(10)—10~(-8)mol/L)可促进妊娠6—8周人胎盘绒毛的孕酮分泌,高剂量则抑制孕酮的分泌,抗hCG多克隆抗血清与单克隆IgG明显抑削孕酮的生成,而且抑制程度与抗体剂量及作用时间相关,然而不同浓度的TRH,PGE_2,PGF_(2a),睾酮、雌二醇等对胎盘绒毛的孕酮分泌则无显著影响,本研究结果表明,妊娠早期人胎盘绒毛的孕酮分泌是受GnRH与hCG调节的,这为证明胎盘中可能存在激素分泌的自我调节系统提供了重要的依据。     

STUDY ON REPRODUCTIVE ENDOCRINOLOGY OF HUMAN PLACENTA (Ⅲ)——HORMONAL REGULATION OF PROGESTERONE PRODUCTION BY TROPHOBLAST TISSUE OF FIRST TRIMESTER

The effect of hormones on progesterone secretion by 6-8 week human trophoblast tissue cultured in serum-free medium has been investigated. GnRH at low concentration (10-10-10-8 mol/L) stimulated progesterone secretion, while high dose (10-6-10-5 mol/L) produced inhibitory effect. The progesterone secretion could be significantly decreased by addition of anti-hCG antiserum or monoclonal anti-hCG IgG in a dose- and time-dependent manner. Various concentrations of TRH, PGE2, PGF2α, testosterone and estradiol were found to be ineffective. These data indicate clearly that progesterone production by human trophoblast tissue at early gestation stage is under the modulation of GnRH and hCG.