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Background

Despite the identification of autophagy-related protein 5 (ATG5) as a molecule involved in the activated autophagy machinery during hepatitis B virus (HBV) infection and hepatocarcinogenesis, the consequences of ATG5 mutation carriage for patients with chronic HBV infection remain unclear. This study examined the association of ATG5 polymorphisms with HBV-related diseases including hepatocellular carcinoma (HCC).

Patients and methods

Two functionally relevant polymorphisms ATG5 rs573775 and rs510432 were genotyped by ligase detection reaction-polymerase chain reaction in 403 patients with chronic HBV infection (171 chronic hepatitis, 119 cirrhosis and 113 HCC) and 196 healthy controls. Univariate and multivariate logistic regression was performed to evaluate factors associated with HCC.

Results

The rs573775 genotype and allele frequencies had no significant differences between patients with different clinical diseases. However, HCC patients had significantly higher frequency of rs510432 genotype AA (odds ratio [OR] 2.185, 95% confidence interval [CI] 1.042-4.581, P = 0.037, P value by Bonferroni correction [Pc] = 0.074) and allele A (OR 1.435, 95% CI 1.023-2.013, Pc = 0.036) than chronic hepatitis patients. In multivariate analyses, rs510432 allele A-containing genotypes (AA+GA) were independently associated with cirrhosis in comparison to chronic hepatitis (OR 1.927, 95%CI 1.011-3.017, P = 0.032). The rs510432 genotypes AA+GA were also independently associated with HCC in comparison to chronic hepatitis (OR 2.583, 95% CI 1.025-3.911, P = 0.006) or chronic HBV infection without HCC (OR 2.632, 95% CI 1.067-3.482, P = 0.032).

Conclusion

These results indicate that rs510432 genotypes AA+GA are associated with disease progression and HCC risk in chronic HBV infection, providing novel evidence for a role of ATG5 in the pathogenesis of HBV-related HCC.

Abbreviations

HBV: hepatitis B virus; HCC hepatocellular carcinoma; TNFSF10: tumor necrosis factor superfamily member 10; ATG5: autophagy-related protein 5; DNA: deoxyribonucleic acid; LDR-PCR: ligase detection reactions-polymerase chain reaction; PCR: polymerase chain reaction; SLE: systemic lupus erythematosus; BD: Behçet's disease; IL-10: interlukin-10; LPS: lipopolysaccharide; PBMC: peripheral blood mononuclear cells; CWP: coal workers' pneumoconiosis; TNF-α: tumor necrosis factor-α."xsd:string
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http://purl.uniprot.org/citations/30907204http://purl.uniprot.org/core/author"Liu Z."xsd:string
http://purl.uniprot.org/citations/30907204http://purl.uniprot.org/core/author"Li N."xsd:string
http://purl.uniprot.org/citations/30907204http://purl.uniprot.org/core/author"Lv Y."xsd:string
http://purl.uniprot.org/citations/30907204http://purl.uniprot.org/core/author"Zhang X."xsd:string
http://purl.uniprot.org/citations/30907204http://purl.uniprot.org/core/author"Wang X."xsd:string
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http://purl.uniprot.org/citations/30907204http://purl.uniprot.org/core/title"Autophagy-Related 5 Gene rs510432 Polymorphism Is Associated with Hepatocellular Carcinoma in Patients with Chronic Hepatitis B Virus Infection."xsd:string
http://purl.uniprot.org/citations/30907204http://purl.uniprot.org/core/volume"48"xsd:string
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