title: Clinicopathologic Significance and Prognostic Value of B7 Homolog 1 in Gastric Cancer: A Systematic Review and Meta-Analysis.
abstract: Immunologic checkpoint marker B7 homolog 1 (B7-H1) plays a fundamental role in the initiation and progression of gastric cancer (GC); however, the clinicopathologic significance and prognostic value of B7-H1 in GC remains controversial. In this study, we aimed to assess their relationship through a meta-analysis.Medline/PubMed, EMBASE, the Cochrane Library databases, and Grey literature were searched up to August 10, 2015, for eligible studies of the association between B7-H1 expression and overall survival in GC. The hazard ratio and its 95% confidence interval (CI) were calculated from the included studies. Moreover, the odds ratio (OR) was also extracted to evaluate the association between the clinicopathologic parameters of participants and B7-H1 expression.Five studies involving 481 patients were included in the meta-analysis. The pooled results showed that positive B7-H1 expression was a negative predictor for overall survival with hazard ratio of 1.74 (95% CI: 1.40-2.17; Pheterogeneity = 0.146) in GC. Additionally, increased B7-H1 was found to be significantly associated with positive lymph node metastasis (OR = 2.61, 95% CI: 1.78-3.84; Pheterogeneity = 0.004) and poorer tumor stage (OR = 2.28, 95% CI: 1.39-3.74; Pheterogeneity = 0.006); however, higher B7-H1 expression was not significantly correlated with poorer tumor differentiation (OR = 1.29, 95% CI: 0.90-1.86; Pheterogeneity = 0.013) and bigger tumor size (OR = 1.18, 95% CI: 0.81-1.73; Pheterogeneity = 0.104).The meta-analysis suggested that B7-H1 could act as a significant biomarker in the poor prognosis of gastric carcinoma.
authors.affiliation: From the Department of General Surgery, Beijing Chao-Yang Hospital, Capital Medical University (FX, GF); Department of Interventional Radiology, Beijing Shijitan Hospital, Capital Medical University (HZ, FL); and Department of Oncology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China (LX, QW, GA).
authors.forename: Feng
authors.initials: F
authors.lastname: Xu
authors.forename: Guosheng
authors.initials: G
authors.lastname: Feng
authors.forename: Hongwei
authors.initials: H
authors.lastname: Zhao
authors.forename: Fuquan
authors.initials: F
authors.lastname: Liu
authors.forename: Lingling
authors.initials: L
authors.lastname: Xu
authors.forename: Qian
authors.initials: Q
authors.lastname: Wang
authors.forename: Guangyu
authors.initials: G
authors.lastname: An
mesh_terms: D060890:B7-H1 Antigen / Q000378:metabolism*; D002277:Carcinoma / Q000378:metabolism* / Q000473:pathology; D006801:Humans; D011379:Prognosis; D013270:Stomach / Q000473:pathology; D013274:Stomach Neoplasms / Q000378:metabolism* / Q000473:pathology
chemical_list: D060890:B7-H1 Antigen; C423236:CD274 protein, human