title: [Potential effect of tumor necrosis factor-alpha and its receptor II gene polymorphisms on the pathogenesis of coal worker's pneumoconiosis].
abstract: OBJECTIVE
  To approach the effect of tumor necrosis factor-alpha (TNF-alpha) and tumor necrosis factor receptor II (TNFRII) gene polymorphisms on genetic susceptibility of coal worker's pneumoconiosis and their relationship with pulmonary fibrosis.
  
  
  METHODS
  Two hundred and thirty-four cases of coal worker's pneumoconiosis (CWP) and four hundred and forty coal mine workers (controls) were selected, and the cases of CWP were divided into three subgroups based on the various stages of I, II and III. 3 ml peripheral vein blood was drawn from every subject. Using polymerase chain reaction-restriction fragment length polymorphisms (PCR-RFLP) techniques, TNF-alpha and TNFRII gene polymorphisms were analyzed.
  
  
  RESULTS
  In both group matching and 1:1 paired matching, there was no significant difference between CWP workers and controls in distribution frequencies of G/A + A/A (TNF-alpha -308) and T/G + G/G (TNFRII 196) genotypes. The distribution frequency of G/A + A/A genotype in CWP with stage III (20.00%) was higher than those in control (10.91%), and CWP cases with stage I (10.34%) and II (7.50%) respectively. The risk of CWP with stage III in those with G/A + A/A genotype was 2-fold higher than with G/G genotype (OR = 3.00, 95% CI: 0.35 approximately 25.84) for 1:1 paired matching.
  
  
  CONCLUSIONS
  TNF-alpha and TNFRII gene polymorphisms does not play an important role in susceptibility to CWP of Han race. TNF-alpha gene promoter polymorphisms might be related with the degree of severe pulmonary fibrosis in CWP.
authors.affiliation: National Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing 100050, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Li
authors.forename: Chen
authors.initials: C
authors.lastname: Yu
authors.forename: Fang
authors.initials: F
authors.lastname: Qi
authors.forename: De-Hong
authors.initials: DH
authors.lastname: Li
authors.forename: Xiao-Hua
authors.initials: XH
authors.lastname: Xu
authors.forename: Peng
authors.initials: P
authors.lastname: Li
authors.forename: Qiang
authors.initials: Q
authors.lastname: Hou
authors.forename: Xiu-Mei
authors.initials: XM
authors.lastname: Zhang
authors.forename: He-Ling
authors.initials: HL
authors.lastname: Wang
mesh_terms: D000368:Aged; D003032:Coal Mining; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D011009:Pneumoconiosis / Q000097:blood / Q000235:genetics*; D012150:Polymorphism, Restriction Fragment Length; D011658:Pulmonary Fibrosis / Q000097:blood / Q000235:genetics; D047889:Receptors, Tumor Necrosis Factor, Type II / Q000097:blood / Q000235:genetics*; D014409:Tumor Necrosis Factor-alpha / Q000032:analysis / Q000235:genetics*
chemical_list: D047889:Receptors, Tumor Necrosis Factor, Type II; D014409:Tumor Necrosis Factor-alpha