No association between hOGG1 Ser326Cys polymorphism and hepatocellular carcinoma.

BACKGROUND/AIMS: To clarify any association between the hOGG1 Ser326Cys polymorphism and susceptibility to hepatocellular carcinoma (HCC). METHODOLOGY: The PubMed, CNKI databases were searched for all available articles. The OR corresponding to the 95% confidence interval (95% CI) was used to assess the association between hOGG1 Ser326Cys polymorphism and susceptibility to HCC. RESULTS: Seven case-control studies, with 1,663 cases and 1,675 controls, were available for this analysis. No association was found between hOGG1 Ser326Cys polymorphism and HCC risk (dominant model: OR=0.695, 95% CI: 0.501-0.964, p=0.029; additive model: OR=0.682, 95% CI: 0.374-1.245, p=0.213; recessive model: OR=1.215, 95% CI: 0.711-2.078, p=0.476). Sensitivity analysis did not perturb the results. CONCLUSIONS: These findings indicated that hOGG1 Ser326Cys polymorphism may not play a role in HCC development. However, larger scale studies are needed for confirmation.

Alterations in bile acids as metabolic signatures in the patients with human adenovirus type 7 infection.

Objectives: The changes in metabolism by human adenovirus (HAdV) infection was unclear. The potential mechanism of HAdV-7 causing acute respiratory tract infection was explored. Methods: Totally 35 patients with HAdV-7 infection, 32 asymptomatic cases with HAdV-7 and 14 healthy controls were enrolled from an outbreak of HAdV-7 in the army. The serum samples were analyzed by untargeted and targeted metabolomics. The effects of differential metabolites were verified on HAdV-7 replication in an A549 cell line. Results: The untargeted metabolomics analysis revealed more significant changes in the classes of sphingolipids, polyketides, glycerolipids, fatty acyls, and carboxylic acids and their derivatives in the patients with HAdV-7 than in healthy controls. Two key metabolic pathways of secondary and primary bile acid biosynthesis were noted from pathway enrichment analysis. Targeted metabolomics analysis showed that the levels of unconjugated bile acids in the patients were significantly lower, while the levels of glyco- and tauro- conjugated bile acids in patients and asymptomatic cases were higher than those in the healthy controls. The profiles of cytokines and peripheral lymphocyte subsets obviously varied at different levels of bile acids, with significant differences after HAdV-7 infection. A cell verification test demonstrated that the replication of HAdV-7 significantly reduced when GCDCA and TCA were added. Conclusion: Bile acids inhibited HAdV-7 replication in vitro. Alterations in bile acids was metabolic signatures of HAdV-7 infected subjects, and our results suggested bile acids might play protective roles against HAdV-7 infection.