Association of Macrophage Migration Inhibitory Factor-794 CATT Microsatellite Polymorphism With Tuberculosis Risk: A...

Area of Science:

• Immunogenetics
• Infectious Diseases
• Population Genetics

Background:

• Tuberculosis (TB) is a global health threat influenced by host genetics.
• Macrophage migration inhibitory factor (MIF) is a key inflammatory cytokine.
• The MIF-794 CATT polymorphism may impact TB susceptibility.

Purpose of the Study:

• To systematically review and meta-analyze the association between the MIF-794 CATT polymorphism and TB risk.
• To evaluate the role of this genetic variant in different populations.

Main Methods:

• Comprehensive literature search across major databases (PubMed, Embase, etc.).
• Inclusion of seven high-quality case-control studies (1063 TB cases, 957 controls).
• Pooled analysis using odds ratios (ORs) and confidence intervals (CIs) under various genetic models.

Main Results:

• A modest association between longer CATT alleles (CATT7/CATT8) and increased TB susceptibility was suggested.
• A stronger trend was observed in East Asian cohorts; results varied in African and Latin American populations.
• High study quality and no marked publication bias were noted, but small study numbers limit interpretation.

Conclusions:

• The MIF-794 CATT polymorphism may contribute to TB susceptibility, but the evidence is modest, heterogeneous, and inconclusive.
• This variant is a potential component of an immunogenetic framework, not a standalone biomarker.
• Further large-scale, multicentric studies are needed to clarify its role in TB risk.