Study on endocrine therapy of scirrous type gastric cancer using Medroxyprogesterone acetate

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1). Characterization of estrogen receptor in human gastric cancer. Estrogen receptor(ER) in human gastric cancer is characterized. 150,40OXg suppernatant was used as cytozol. In the cytozol, sucrose density gradingts showed 5s and 8s binding peaks for ER. Steroid specificity studies showed that estrogen for estradiol-receptor binding was specific inhibitor.2). Both ER and PgR were located at the nuclei of gastric cancer cells. ER positive rate was 29% and PgR positive rate was 10.3%. ER and PgR positive rate were most likely to be associated with poorly differentiated carcinoma, scirrhous type carcinoma and younger female gastric cancer patients.3). The respectable gastric cancer patients with administration of Tamoxifen showed better prognosis than those without administration of tamoxifen.4). The poorly gastric cancer cells ( KATO III ) were inhibited in vivo by Medroxyprogesterone acetate ( 1x10^<-6>M-1x10^<-7>M ).