A Meta-analysis of MBL2 Polymorphisms and Tuberculosis Risk

Area of Science:

• Immunogenetics
• Infectious Disease Epidemiology
• Molecular Biology

Background:

• The mannose-binding lectin 2 (MBL2) gene is a key component of the innate immune system.
• Previous research on MBL2 gene variants (rs1800451, rs1800450, rs5030737, rs7096206, rs11003125, rs7095891) and their association with tuberculosis (TB) susceptibility has yielded inconsistent results.

Purpose of the Study:

• To conduct a comprehensive meta-analysis evaluating the association between MBL2 gene polymorphisms and the risk of developing TB.
• To clarify the inconsistent findings regarding MBL2 variants and TB susceptibility.

Main Methods:

• A meta-analysis was performed, pooling data from 22 studies involving 7095 TB patients and 7662 controls.
• Data were analyzed for associations between MBL2 alleles, genotypes, and minor allele carriers with TB risk.
• Stratified analyses were conducted based on ethnicity.

Main Results:

• The homozygous variant genotype (CC) of MBL2 rs1800451 was significantly associated with a reduced risk of TB (OR=0.834, p=0.045).
• No significant associations were found for other genetic models of the studied MBL2 polymorphisms (rs1800450, rs5030737, rs7096206, rs11003125, rs7095891) and combined variants.
• Stratified analysis revealed a decreased TB risk in the African population for MBL2 rs1800450 and rs1800451.

Conclusions:

• MBL2 gene polymorphisms rs1800450 and rs1800451 demonstrate a protective effect against TB infection.
• These specific MBL2 polymorphisms are significant potential genetic markers for TB resistance.