Polymorphisms of the TIM-1 Gene Are Associated With Rheumatoid Arthritis in the Chinese Hui Minority Ethnic Population

Genet Mol Res. 2012 Jan 9;11(1):61-9. doi: 10.4238/2012.January.9.7.

Abstract

The T-cell immunoglobulin and mucin domain 1 (TIM-1) is known to be associated with susceptibility to rheumatoid arthritis (RA). We investigated the association of four single-nucleotide polymorphisms (SNPs) in the promoter region of the TIM-1 gene with susceptibility to RA in a Chinese Hui ethnic minority group. Using RFLP or sequence specific primer-PCR, 118 RA patients and 118 non-arthritis control individuals were analyzed for the -1637A>G, -1454G>A, -416G>C, and -232A>G SNPs in the TIM-1 gene. The polymorphisms -232A>G and -1637A>G in the promoter region of TIM-1 were found to be associated with susceptibility to the RA gene in the Hui population, while -416G>C and -1454G>A SNPs were not. Of these, the polymorphism of -232A>G is inconsistent with that found in a Korean population, suggesting that genetic variations of the TIM-1 gene contribute to RA susceptibility in different ways among different populations. Based on haplotype analysis, individuals with haplotypes AGCA (Χ(2) = 22.0, P < 0.01, OR (95%CI) >1), AGCG (Χ(2) = 18.16, P < 0.01, OR (95%CI) >1) and AGGA (Χ(2) = 5.58, P < 0.05, OR (95%CI) >1) are at risk to develop RA in the Chinese Hui population; those with the GAGA (Χ(2) = 7.44, P < 0.01, OR (95%CI) <1) haplotype may have a decreased likelihood of RA. GGCA and GGCG are more common in both RA and non-RA subjects. We conclude that -1637A>G and -232A>G polymorphisms of TIM-1 are associated with susceptibility to RA in the Chinese Hui population.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Arthritis, Rheumatoid / ethnology
  • Arthritis, Rheumatoid / genetics*
  • China / ethnology
  • Ethnic Groups / genetics
  • Genetic Predisposition to Disease
  • Genetic Variation
  • Genotype
  • Haplotypes
  • Hepatitis A Virus Cellular Receptor 1
  • Humans
  • Membrane Glycoproteins / genetics*
  • Polymorphism, Single Nucleotide*
  • Promoter Regions, Genetic*
  • Receptors, Virus / genetics*

Substances

  • HAVCR1 protein, human
  • Hepatitis A Virus Cellular Receptor 1
  • Membrane Glycoproteins
  • Receptors, Virus