title: Mannose-binding lectin gene polymorphisms and the development of coal workers' pneumoconiosis in Japan.
abstract: BACKGROUND
  Infection, immunity and genetic factors play roles in the development of coal worker's pneumoconiosis (CWP) and progressive massive fibrosis (PMF). We investigate whether the genetic polymorphisms of mannose-binding lectin (MBL), one of the key molecules of innate immunity, is associated with the susceptibility to CWP.
  
  
  METHODS
  MBL2 polymorphisms (codon54, promoter -221, and -550) were assessed for 197 patients with CWP (119 with nodular CWP and 78 with PMF) and 153 unexposed regional controls. Serum MBL concentrations were measured in 119 CWP patients.
  
  
  RESULTS
  Three polymorphisms were in linkage disequilibrium for all study populations. The MBL2 genotype and haplotypes were associated with lower serum MBL levels. The frequency of such MBL2 genotype and haplotypes were significantly higher in patients with CWP compared to controls, whereas these distributions were not different between patients with nodular CWP and those with PMF.
  
  
  CONCLUSIONS
  MBL2 polymorphisms and haplotypes may be one of the genetic determinants for the susceptibility of CWP.
authors.affiliation: Department of Pulmonary Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan.
authors.forename: Xintao
authors.initials: X
authors.lastname: Wang
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Ohtsuka
authors.forename: Kiyonobu
authors.initials: K
authors.lastname: Kimura
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kaji
authors.forename: Junpei
authors.initials: J
authors.lastname: Saito
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Tanino
authors.forename: Takashi
authors.initials: T
authors.lastname: Ishida
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Munakata
mesh_terms: D000368:Aged; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D006239:Haplotypes; D006801:Humans; D007564:Japan; D008297:Male; D037601:Mannose-Binding Lectin / Q000097:blood / Q000235:genetics*; D011009:Pneumoconiosis / Q000097:blood / Q000235:genetics*; D011110:Polymorphism, Genetic
chemical_list: D037601:Mannose-Binding Lectin