MIF -173 G > C (rs755622) Gene Polymorphism Modulates Tuberculosis Risk: Evidence from a Meta-analysis and Trial Sequential Analysis

Sci Rep. 2017 Dec 5;7(1):17003. doi: 10.1038/s41598-017-17308-y.

Abstract

The macrophage migration inhibitory factor (MIF) is a cytokine that plays an important role in inhibiting the growth of pathogenic Mycobacterium tuberculosis (M.tb) and regulates immune responses against M.tb pathogen. MIF -173 G > C gene polymorphism may affect immunity in an individual and leads to susceptibility to tuberculosis (TB). A large number of studies have investigated the relevance of this polymorphism with TB risk, but their results were inconclusive. To obtain a precise conclusion, a meta-analysis was performed by retrieving six eligible studies from Google Scholar, PubMed (Medline), and EMBASE online databases. Overall combined analysis suggested increased TB risk between MIF -173 G > C polymorphism and overall risk in four genetic models, i.e., allelic (C vs. G: p = 0.001; OR = 1.517, 95% CI = 1.312 to 1.753), homozygous (CC vs. GG: p = 0.026; OR = 1.874, 95% CI = 1.079 to 3.257), heterozygous (GC vs. GG: p = 0.001; OR = 1.542, 95% CI = 1.273 to 1.868) and dominant model (CC + GC vs. GG: p = 0.001; OR = 1.631, 95% CI = 1.362 to 1.955). Similarly, increased TB risk was observed in subgroup analysis of Asian ethnicity. No publication bias was observed. These results suggested that MIF -173 G > C variant is a significant risk factor for TB in overall and in Asian populations, and can be used as prognostic marker for TB susceptibility.

Publication types

  • Meta-Analysis

MeSH terms

  • Case-Control Studies
  • Genetic Predisposition to Disease
  • Humans
  • Intramolecular Oxidoreductases / genetics*
  • Macrophage Migration-Inhibitory Factors / genetics*
  • Mycobacterium tuberculosis / isolation & purification*
  • Polymorphism, Single Nucleotide*
  • Prognosis
  • Risk Factors
  • Tuberculosis / epidemiology
  • Tuberculosis / genetics*
  • Tuberculosis / microbiology

Substances

  • Macrophage Migration-Inhibitory Factors
  • Intramolecular Oxidoreductases
  • MIF protein, human