卵巢癌表达Bcl-xL与其化疗耐受性及复发相关  

Expression of Bcl- xL in ovarian carcinoma is associated with chemoresistance and recurrent disease

作　　者：Williams J. Lucas P.C. Griffith K.A. 张家墅 程金湘 

出　　处：《世界核心医学期刊文摘（妇产科学分册）》2005年第6期43-44,共2页Core Journal in Obstetrics/Gynecology

摘　　要：The long- term survival of patients with epithelial ovarian cancer is limited by the emergence of tumor cells that are resistant to chemotherapy. We hypothesized that expression of Bcl- xL,a homologue of Bcl- 2 that confers protection from chemotherapy- induced apoptosis, may be predictive of patients’ clinical response to treatment, and that treatment with chemotherapy may result in the selection of tumor cells that overexpress this protein. We determined the expression of Bcl- xL in epithelial ovarian cancers from 28 patients at the time of initial staging laparotomy and in recurrent tumors in the same patients following treatment with platinum- based chemotherapy. The data were analyzed to determine whether Bcl- xL expression was predictive of clinical outcome. A2780 ovarian cancer cells were stably transfected with Bcl- xL or control plasmid. Chemotherapy- induced apoptosis in these cell lines was determined in vitro and in a xenograft model. Bcl- xL expression in primary tumors was associated with a significantly shorter disease- free interval as compared to patients whose tumors did not express Bcl- xL (1.6 months as compared to 7.7 months). We found that Bcl- xL expression conferred resistance to chemotherapy- induced apoptosis resulting from treatment with cisplatin, paclitaxel, topotecan, and gemcitabine in vitro. In a xenograft model, Bcl- xL expressing tumors continued to grow following treatment with cisplatin, paclitaxel, topotecan, and gemcitabine, in contrast to control tumors, which disappeared. These results portray an important role for Bcl- xL as a key factor associated with chemotherapy failure in the treatment of ovarian cancer.The long- term survival of patients with epithelial ovarian cancer is limited by the emergence of tumor cells that are resistant to chemotherapy. We hypothesized that expression of Bcl- xL,a homologue of Bcl- 2 that confers protection from chemotherapy- induced apoptosis, may be predictive of patients’ clinical response to treatment, and that treatment with chemotherapy may result in the selection of tumor cells that overexpress this protein. We determined the expression of Bcl- xL in epithelial ovarian cancers from 28 patients at the time of initial staging laparotomy and in recurrent tumors in the same patients following treatment with platinum- based chemotherapy. The data were analyzed to determine whether Bcl- xL expression was predictive of clinical outcome. A2780 ovarian cancer cells were stably transfected with Bcl- xL or control plasmid. Chemotherapy- induced apoptosis in these cell lines was determined in vitro and in a xenograft model. Bcl- xL expression in primary tumors was associated with a significantly shorter disease- free interval as compared to patients whose tumors did not express Bcl- xL (1.6 months as compared to 7.7 months). We found that Bcl- xL expression conferred resistance to chemotherapy- induced apoptosis resulting from treatment with cisplatin, paclitaxel, topotecan, and gemcitabine in vitro. In a xenograft model, Bcl- xL expressing tumors continued to grow following treatment with cisplatin, paclitaxel, topotecan, and gemcitabine, in contrast to control tumors, which disappeared. These results portray an important role for Bcl- xL as a key factor associated with chemotherapy failure in the treatment of ovarian cancer.

关 键 词：化疗耐受性 BCL-XL 铂类药物 拓扑替康 细胞凋亡 异种移植 临床反应 体外试验 长期存活率 剖腹术 

分 类 号：R737.31[医药卫生—肿瘤]