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Published on: August 11, 2008
Mannose-binding lectin and susceptibility to tuberculosis: a meta-analysis.
J T Denholm1, E S McBryde, D P Eisen
1Victorian Infectious Diseases Service, Royal Melbourne Hospital, Parkville, Melbourne, Vic., Australia. justin.denholm@mh.org.au
Clinical and Experimental Immunology
|July 20, 2010
Summary
Mannose-binding lectin (MBL) levels and MBL2 genotype were investigated for their impact on tuberculosis (TB) susceptibility. MBL2 genotype showed no significant association, but elevated serum MBL levels were observed in TB patients.
Area of Science:
- Immunology
- Infectious Diseases
- Genetics
Background:
- Mannose-binding lectin (MBL) plays a role in innate immunity.
- Previous studies on MBL's role in tuberculosis (TB) susceptibility have yielded conflicting results.
- Understanding MBL's influence on TB infection is crucial for developing targeted interventions.
Purpose of the Study:
- To evaluate the association between MBL2 genotype and MBL serum levels with susceptibility to pulmonary TB infection.
- To synthesize existing evidence through a meta-analysis of human trials.
Main Methods:
- A comprehensive literature review and meta-analysis were conducted.
- Seventeen human trials investigating MBL2 genotype and/or MBL levels in relation to TB infection were included.
- Data on MBL2 genotype, MBL haplotype, and serum MBL levels were analyzed.
Main Results:
- No significant association was found between MBL2 genotype and pulmonary TB infection.
- The majority of studies did not report MBL2 haplotypes including promoter polymorphisms.
- Serum MBL levels were consistently elevated in individuals with TB infection, potentially reflecting an acute-phase response.
Conclusions:
- Current MBL2 genotypes, as reported in the literature, do not appear to be significantly associated with susceptibility to pulmonary TB.
- Elevated serum MBL levels in TB patients warrant further investigation to determine their protective or reactive role.
- Further research should include comprehensive MBL2 haplotype analysis for a clearer understanding of MBL's role in TB.
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