title: Sequence variations in the MBL gene and their relationship to pulmonary tuberculosis in the Chinese Han population.
abstract: METHODS
  The mannan binding lectin (MBL) gene is thought to play a role in human innate immune response to tuberculosis (TB) infection.
  
  
  OBJECTIVE
  To investigate the possible association between MBL sequence variants and TB infection in the Chinese Han population.
  
  
  METHODS
  A total of 152 male pulmonary tuberculosis (PTB) patients and 293 healthy male subjects were recruited. Six MBL single nucleotide polymorphisms (SNPs) (A/B, A/C, A/D, H/L, Y/X and P/Q) were genotyped and haplotyped using the combined analysis of polymerase chain reaction using sequence-specific primers (PCR-SSP) and the PCR-sequence specific oligonucleotide probe (PCR-SSOP) assay. The genotype and haplotype frequencies were compared between TB cases and controls using an unconditional logistic regression model.
  
  
  RESULTS
  Neither the genotypes nor the haplotypes of the five loci were significantly associated with the disease when considered individually. After the haplotypes were regrouped, however, the XB haplotype group coding for diminished MBL levels was present at a significantly higher frequency in the patients compared with the YA group (OR 1.57, 95% CI 1.02-2.41, P < 0.05).
  
  
  CONCLUSIONS
  No convincing evidence of association between MBL sequence variants and PTB was observed individually, although the low-producing XB haplotype group may serve as a minor risk factor for PTB infection in the male Chinese Han population.
authors.affiliation: Beijing Institute of Microbiology and Epidemiology, State Key Laboratory of Pathogen and Biosecurity, Beijing, China.
authors.forename: W
authors.initials: W
authors.lastname: Liu
authors.forename: F
authors.initials: F
authors.lastname: Zhang
authors.forename: Z T
authors.initials: ZT
authors.lastname: Xin
authors.forename: Q M
authors.initials: QM
authors.lastname: Zhao
authors.forename: X M
authors.initials: XM
authors.lastname: Wu
authors.forename: P H
authors.initials: PH
authors.lastname: Zhang
authors.forename: S
authors.initials: S
authors.lastname: de Vlas
authors.forename: J H
authors.initials: JH
authors.lastname: Richardus
authors.forename: J D F
authors.initials: JD
authors.lastname: Habbema
authors.forename: H
authors.initials: H
authors.lastname: Yang
authors.forename: W C
authors.initials: WC
authors.lastname: Cao
mesh_terms: D000293:Adolescent; D000328:Adult; D044466:Asian People / Q000235:genetics*; D002681:China; D014644:Genetic Variation / Q000235:genetics*; D005838:Genotype; D006239:Haplotypes; D006801:Humans; D015810:Linkage Disequilibrium; D008297:Male; D037601:Mannose-Binding Lectin / Q000097:blood / Q000235:genetics*; D008875:Middle Aged; D020411:Oligonucleotide Array Sequence Analysis; D020641:Polymorphism, Single Nucleotide; D011401:Promoter Regions, Genetic; D012307:Risk Factors; D014397:Tuberculosis, Pulmonary / Q000208:ethnology* / Q000235:genetics*
chemical_list: D037601:Mannose-Binding Lectin