Polymorphisms in the promoter regions of the CXCL1 and CXCL2 genes contribute to increased risk of alopecia areata in the Korean population

Genet Mol Res. 2015 Aug 14;14(3):9667-74. doi: 10.4238/2015.August.14.29.

Abstract

Alopecia areata (AA) is a common disease, which causes hair loss in humans. AA has a genetically complex inheritance. This study investigated the possible correlations between single nucleotide polymorphisms (SNPs) in the promoter regions of the chemokine (C-X-C motif) ligand 1 (melanoma growth stimulating activity, alpha) (CXCL1) and chemokine (C-X-C motif) ligand 2 (CXCL2) genes and the development of AA in the Korean population. Two hundred and thirty-five AA patients and 240 control subjects were recruited. The specific SNPs occurring in the promoter regions of the CXCL1 and CXCL2 genes (rs3117604, -429C/T and rs3806792, -264T/C, respectively) were genotyped. All data obtained was evaluated using the SNPStats, SPSS 18.0, and the Haploview v.4.2 software platforms. The Odd's ratios (OR), 95% confidence intervals (CI), and P values were calculated using multiple logistic regression models. Analyses of the genetic sequences obtained revealed a significant correlation between the two SNPs and the development of AA (rs3117604, P = 0.0009 in co-dominant model 1, P = 0.01 in co-dominant model 2, P = 0.004 in the dominant model, P = 0.005 in the log-additive model, P = 0.012 in allele distribution; rs3806792, P = 0.036 in co-dominant model 2, P = 0.0046 in the log-additive model). The TT and CC haplotypes were also observed to show a significant association with increased risk of AA (TT haplotype, P = 0.0018; CC haplotype, P = 0.0349). Our data suggests that the CXCL1 and CXCL2 genes may be associated with AA susceptibility.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Alleles
  • Alopecia Areata / diagnosis
  • Alopecia Areata / epidemiology
  • Alopecia Areata / genetics*
  • Case-Control Studies
  • Chemokine CXCL1 / genetics*
  • Chemokine CXCL2 / genetics*
  • Female
  • Gene Frequency
  • Genetic Association Studies
  • Genetic Predisposition to Disease*
  • Genotype
  • Haplotypes
  • Humans
  • Male
  • Odds Ratio
  • Polymorphism, Single Nucleotide*
  • Promoter Regions, Genetic*
  • Republic of Korea / epidemiology
  • Risk
  • Young Adult

Substances

  • Chemokine CXCL1
  • Chemokine CXCL2