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. 2017 Mar 15;17(1):210.
doi: 10.1186/s12879-017-2310-3.

Association of mannose-binding lectin gene polymorphisms with the development of pulmonary tuberculosis in China

Yan-Ling Guo  1 , Yang Liu  2 , Wu-Juan Ban  3 , Qi Sun  4 , Guang-Li Shi  3
Affiliations

Association of mannose-binding lectin gene polymorphisms with the development of pulmonary tuberculosis in China

Yan-Ling Guo et al. BMC Infect Dis. .

Abstract

Background: Mannose-binding lectin (MBL) is an important protein in the lectin pathway of the immune system. This study explores the association between MBL polymorphism and the susceptibility to tuberculosis (TB). The association between the MBL2 polymorphisms and serum MBL levels is also analyzed in the present study.

Methods: A total of 112 inpatients with pulmonary TB and 120 healthy controls were recruited to participate in this case-control study. Polymerase Chain Reaction-Restriction Fragment Length Polymorphism(PCR-RFLP) technology was used to genotype MBL gene (variants in -221Y/X and exon l codons 54 A/B). Serum MBL level was assayed by human MBL ELISA kit. Demographic data and exposure information were also obtained from the study participants.

Results: Genotypes YA/YA of MBL gene were more prevalent in the healthy control group than in the TB patient (P =0.038, OR, 0.57; 95% CI, 0.34-0.97) and genotypes XA/XA were less frequent in the healthy control group (P =0.007, OR, 6.42; 95% CI, 1.39-29.67). The resistant diplotype was more frequently found in the younger patients and retreatment cases with TB in MBL gene sites -221Y/X or codon 54 A/B. X/Y and A/B polymorphisms were strong determinants of serum MBL levels.

Conclusion: The polymorphisms of MBL gene may be associated with susceptibility to TB and the recurrence of TB. The YA/YA may be a protected diplotype against TB.

Keywords: Mannose-binding lectin (MBL); Polymorphism; Susceptibility; Tuberculosis.

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Figures

Fig. 1
Fig. 1
Serum MBL levels and diplotypes in patients with TB. MBL levels were different among the three groups (P < 0.01), and the difference was significant between any two of the three group
Fig. 2
Fig. 2
Serum MBL levels and diplotypes in healthy control. MBL levels were different among the three groups (P < 0.01), and the difference was significant between any two of the three groups. 93.2% of the YA/YA carrying individuals and ≤500 ng/mL in 84.6% of the XA/XA- or B- carrying individuals in healthy controls
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