【摘要】 建立了胃泌素受体（ＧＲ）的放射配基结合分析法，测定３４例胃癌及邻近正常粘膜胃泌素受体含量及亲和力Ｋｄ。发现五肽胃泌素（Ｇｓ－５）及［Ｌｅｕ１５］Ｇｓ－１７均能作为非标记配基，Ｇｓ－５的抑制效果更好。醋酸纤维混合膜（Φ０．４５μｍ）分离结合及游离部分１２５［Ｌｅｕ１５］Ｇｓ－１７效果好。３４例胃癌及其邻近正常粘膜表达ＧＲ是一致的。更多还原

【Abstract】 Radioligand binding assay of gastrin receptor(GR) was established to determine GR content and Kd of gastric cancer and mucosa in specimens of 34 patients. Both of Gs-5 and [len15]Gs-17, as unlabelled ligand, can inhibit the binding of 125I-(leu15)Gs-17to the membrane, and the inhibiting effect of Gs-5 is slightly stronger than that of (len15)Gs-17.Mixed cellulose acetate filters have better effect to separate bound 125I (leu15)Gs-17 from free 125I- (len15)Gs-17 than glass fibre filters (Hongguan 999999).The GR of gastric cancer correlates with that of mucosa in the same region of 34patients.更多还原