Association between TLR2 Arg677Trp polymorphism and tuberculosis susceptibility: A meta-analysis

Area of Science:

• Immunogenetics
• Infectious Disease Epidemiology
• Molecular Biology

Background:

• Toll-like receptor 2 (TLR2) plays a crucial role in initiating inflammatory responses against bacterial infections.
• The Arg677Trp polymorphism in TLR2 has been investigated for its potential link to tuberculosis (TB) susceptibility.
• Previous studies on this association have yielded inconsistent results, necessitating a comprehensive review.

Purpose of the Study:

• To investigate the relationship between Toll-like receptor 2 (TLR2) Arg677Trp gene polymorphisms and the risk of developing tuberculosis (TB).

Main Methods:

• A meta-analysis was conducted, pooling data from six case-control studies.
• The association was assessed using odds ratios (OR) and their corresponding 95% confidence intervals (95%CI).
• Statistical analyses were performed under both allele contrast and recessive genetic models.

Main Results:

• The meta-analysis included six case-control studies examining the TLR2 Arg677Trp polymorphism and TB risk.
• No significant association was found between the TLR2 Arg677Trp polymorphism and TB susceptibility under the allele contrast (C vs. T).
• Similarly, no significant association was detected under the recessive genetic model (CC vs. CT/TT).

Conclusions:

• The Toll-like receptor 2 (TLR2) Arg677Trp polymorphism is not associated with tuberculosis (TB) susceptibility.
• The findings suggest that this specific TLR2 polymorphism does not significantly influence an individual's risk of developing TB.
• Further investigation into other genetic factors and their interplay with environmental influences is warranted for a complete understanding of TB pathogenesis.