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1.  Evaluation of IL10, IL19, and IL20 gene polymorphisms and chronic hepatitis B infection outcome 
Summary
Hepatitis B viral infection remains a serious global health problem despite the availability of a highly effective vaccine. Approximately 5% of HBV-infected adults develop chronic hepatitis B, which may result in liver cirrhosis or hepatocellular carcinoma. Variants of interleukin-10 (IL10) have been previously associated with chronic hepatitis B infection and progression to hepatocellular carcinoma. Single nucleotide polymorphisms (SNPs, n = 42) from the IL10, IL19, and IL20 gene regions were examined for an association with HBV infection outcome, either chronic or recovered, in a nested case-control study of African Americans and European Americans. Among African Americans, three nominally statistically significant SNP associations in IL10, two in IL20, and one haplotype association were observed with different HBV infection outcomes (P = 0.005–0.04). The SNP, rs1518108, in IL20 nominally deviated significantly from Hardy-Weinberg equilibrium in African Americans, with a large excess of heterozygotes in chronic HBV-infected cases (P = 0.0006), which suggests a strong genetic effect. Among European Americans, a nominally statistically significant SNP association in IL20, as well as an IL20 haplotype were associated with HBV recovery (P = 0.01–0.04). These results suggest that IL10 and IL20 gene variants influence HBV infection outcome and encourage the pursuit of further studies of these cytokines in HBV pathogenesis.
doi:10.1111/j.1744-313X.2008.00770.x
PMCID: PMC2874896  PMID: 18479293
Interleukin-10; Inflammation; African American; Immunogenetics; Hepatitis b; HIV co-infection

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