title: Costimulatory molecule B7-H1 on the immune escape of bladder cancer and its clinical significance.
abstract: B7-H1, a recently described member of the B7 family of costimulatory molecules, is thought to be involved in tumor immune escape by inducing T-cell apoptosis. In order to investigate the relationship between B7-H1 and immune escape of bladder cancer, B7-H1 expression in 50 cases of bladder cancer was detected by using immunohistochemical method. Survival curves were constructed using the Kaplan-Meier method and independent prognostic factors were evaluated using the Cox regression model. Our results showed that the positive rate of B7-H1 immunostaining in normal bladder tissue and bladder cancer was 0 and 72% respectively. The expression of B7-H1 was strongly associated with the pathological grade, clinical stage and recurrence (P<0.05). The survival rate was significantly lower in patients with B7-H1 positive group than in those with B7-H1 negative group and multi-variable analysis revealed that B7-H1 could be regarded as an independent factor in evaluating the prognosis of bladder cancer. It is concluded that the expression of B7-H1 is strongly associated with neoplastic progression and prognosis of bladder cancer. The manipulation of B7-H1 may become a beneficial target for immunotherapy in human bladder cancer.
authors.affiliation: Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. doctorwangyonghua@yahoo.cn
authors.forename: Yonghua
authors.initials: Y
authors.lastname: Wang
authors.forename: Qianyuan
authors.initials: Q
authors.lastname: Zhuang
authors.forename: Siwei
authors.initials: S
authors.lastname: Zhou
authors.forename: Zhiquan
authors.initials: Z
authors.lastname: Hu
authors.forename: Ruzhu
authors.initials: R
authors.lastname: Lan
mesh_terms: D000328:Adult; D000368:Aged; D015703:Antigens, CD / Q000235:genetics / Q000378:metabolism*; D018122:B7-1 Antigen / Q000235:genetics / Q000378:metabolism*; D060890:B7-H1 Antigen; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D019139:Tumor Escape / Q000235:genetics*; D001749:Urinary Bladder Neoplasms / Q000276:immunology* / Q000378:metabolism
chemical_list: D015703:Antigens, CD; D018122:B7-1 Antigen; D060890:B7-H1 Antigen; C423236:CD274 protein, human