[Effects of gossypol acetate, progesterone, danazol and GnRH-A (gonadotropin release hormone-A) on the DNA-synthesis of human endometrial cell in vitro].

Both aberrant endometrial cell and endometrial cell in situ, showed cyclic changes under the control of ovarian hormones. In this study, in order to observe a direct effect of medical therapy on the endometriosis, endometrial cells were cultured in vitro. Sensitivity test to 10(-6) M gossypol acetate, progesterone, danazol and GnRH-A were performed using determination of DNA synthesis by incorporation of tritiated thymidine. The results showed these drugs (but not GnRH-A) decreased the amount of attached cells, and lowered the DNA synthesis of endometrial cell in vitro (P less than 0.01). The inhibition rates of gossypol acetate was higher than that of progesterone and danazol, while that of progesterone was higher than that of danazol (P less than 0.01). The relationship between the growth inhibitory effect of progesterone and danazol showed a significant correlation for all points (r = 0.89, P less than 0.05). It has been suggested that some drugs might act a direct inhibitory effect on endometrial cell, such effect might be one of the modes in the treatment of endometriosis. GnRH-A had no direct suppression on endometrial cell in vitro, it has got clinical effect through the central effect at the hypothalamo-pituitary-ovary axis in treatment of endometriosis.