Vitamin D level and vitamin D receptor genetic variations contribute to HCV infection susceptibility and chronicity in a Chinese population.

Abstract

Vitamin D and vitamin D receptor (VDR) are involved in multiple immune-mediated disorders including chronic hepatitis C virus (HCV) infection. The aim of this study was to determine the association between plasma vitamin D level, VDR genetic polymorphisms and risk of HCV infection susceptibility and chronicity. Seven single nucleotide polymorphisms (SNPs) in VDR gene were genotyped and plasma 25-hydroxyvitamin D [25(OH)D] levels were measured in a Han Chinese population of 898 HCV persistent infection cases, 558 spontaneous clearance subjects and 1136 uninfected controls with high risk of HCV infection. In this case-control study, the average plasma 25(OH)D level in persistent infection patients was significantly lower than that in spontaneous clearance cases (P=0.039) and controls (P=0.005). Logistic analyses indicated that rs7975232-C, rs2239185-T and rs11574129-T alleles were significantly associated with a decreased risk of HCV infection susceptibility (all PBonferroni<0.05, in additive/dominant models; Ptrend=9.000×10(-4), combined effects in a locus-dosage manner). The protective effects of three favorable alleles were more evident among males, females and subjects aged ≤50years (all P<0.05). Haplotype analyses suggested that compared with the most frequent haplotype Ars7975232Trs731236Crs11574129, CTT was correlated with a reduced risk of HCV infection susceptibility (P=2.200×10(-3)). These findings implied that low vitamin D levels might be associated with an increased risk for HCV infection and chronicity, and favorable VDR variants (rs7975232-C, rs2239185-T and rs11574129-T) might contribute to a decreased susceptibility to HCV infection in a high-risk Chinese population.

• Authors: Mengping Wu, Ming Yue, Peng Huang, Yun Zhang, Chaonan Xie, Rongbin Yu, Jun Li, Jie Wang
• Journal: Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases (Infect Genet Evol) Vol. 41 Pg. 146-152 (07 2016) ISSN: 1567-7257 [Electronic] Netherlands
• PMID: 27063396 (Publication Type: Journal Article)
• Copyright: Copyright © 2016 Elsevier B.V. All rights reserved.

Chemical References

• Receptors, Calcitriol
• VDR protein, human
• Vitamin D
• 25-hydroxyvitamin D

Topics

• Adult
• Age Factors
• Aged
• Alleles
• Asian People
• Case-Control Studies
• Female
• Gene Expression
• Gene Frequency
• Genetic Predisposition to Disease
• Haplotypes
• Hepacivirus (growth & development, pathogenicity)
• Hepatitis C, Chronic (blood, ethnology, genetics, virology)
• Humans
• Male
• Middle Aged
• Polymorphism, Single Nucleotide
• Receptors, Calcitriol (blood, genetics)
• Remission, Spontaneous
• Risk
• Severity of Illness Index
• Vitamin D (analogs & derivatives, blood)