The prognostic value of B7H1 and B7H4 expression in pancreatic cancer: A meta-analysis

Objective: The clinical implications of B7H1 and B7H4 in pancreatic cancer have been described however, the prognostic significance of these genes in pancreatic cancer patients remains inconclusive. The aim of the present study was to evaluate the prognostic role of B7H1 and B7H4 in pancreatic cancer patients. Methods: Electronic databases (PubMed, EMBASE, and the Cochrane Library) were searched for relevant articles published before May 2019. Meta-analyses were performed by pooling the hazard ratios (HRs) between overall survival or cancer-specific survival and high or low expression of B7H1/B7H4 in pancreatic cancer patients. Subgroup and sensitivity analyses were performed, and sources of variabilities were explored by performing meta-regression. Results: Sixteen studies (1434 patients’ data) were included. Compared with low expression, high expression of B7H1 was associated with significantly poor overall survival (HR 1.92 (95% confidence interval (CI) 1.35, 2.74); P50% patients with high expression (HR 1.40 (95% CI 0.87, 2.26)). Conclusion: The current study suggests that high B7H1 and B7H4 expression is associated with a poor prognosis in pancreatic cancer patients.