Effect of medroxyprogesterone acetate contraception on cytoplasmic estrogen receptor content of the human cervix uteri.
Specimens of cervical tissue from five women each on 150 mg and 450 mg regimens of medroxyprogesterone acetate (MPA) for contraceptive purposes, were obtained through punch biopsy 15 days after injection. In another group of five women each on the same contraceptive regimens, punch biopsies of the cervix uteri were obtained 30 days after injection. These times corresponded to maximum and optimum blood levels of MPA respectively. Corresponding tissue from the same anatomical position in patients matched, where possible, for age and parity was obtained from hysterectomy specimens to serve as controls. Quantification of estrogen receptor content in the cytoplasm of these tissues was achieved through standard procedures. Analysis of data showed that MPA suppressed estrogen receptor content significantly compared to controls, but that there were no differences in this effect between the two dosages or time of biopsy.
Effect of medroxyprogesterone acetate contraception on cytoplasmic estrogen receptor content of the human cervix uteri. Specimens of cervical tissue from five women each on 150 mg and 450 mg regimens of medroxyprogesterone acetate (MPA) for contraceptive purposes, were obtained through punch biopsy 15 days after injection. In another group of five women each on the same contraceptive regimens, punch biopsies of the cervix uteri were obtained 30 days after injection. These times corresponded to maximum and optimum blood levels of MPA respectively. Corresponding tissue from the same anatomical position in patients matched, where possible, for age and parity was obtained from hysterectomy specimens to serve as controls. Quantification of estrogen receptor content in the cytoplasm of these tissues was achieved through standard procedures. Analysis of data showed that MPA suppressed estrogen receptor content significantly compared to controls, but that there were no differences in this effect between the two dosages or time of biopsy.