Abstract:Objective To systemically investigate the efficacy of thymosin alpha1 on the patients with liver failure.Methods We collected the literatures on thymosin alpha1 used to treat the patients with liver failure in randomized controlled trails (RCTs) and clinical controlled trial (CCT). All these clinical trials were carried out by comparing with routine comprehensive medical treatment liver failure. The total fatality rate, the serum levels of alanine aminotransferase (ALT), total bilirubin (TBIL), and prothrombin activity (PTA) were collected. Odds ratio (OR) was applied to evaluate the effect of thymosin alpha1 on improving case fatality. Weighted mean differences (WMD) was applied to evaluate the effect of thymosin alpha1on improving ALT, TBIL, and PTA.Results There were only 16 literatures and 1208 patients obtained. Compared with routine comprehensive medical treatment, combination with thymosin alpha1 successfully reduce mortality [R = 0.36, (95% CI: 0.26, 0.49)], ALT [MD = -28.46, (95% CI: -38.62, -18.30)], and TBIL [MD = -91.90, (95% CI: -129.25, -54.55)], and improve PTA [MD = 20.38, (95% CI: 13.46, 27.29)].Conclusions Combination with thymosin alpha1 can significantly reduce the fatality rate and improve the serum levels of ALT, TBIL, and PTA than only routine comprehensive medical treatment in patients with liver failure.