title: Polymorphisms in HLA-DRB1 gene and the risk of tuberculosis: a meta-analysis of 31 studies.
abstract: OBJECTIVE
  The HLA-DRB1 gene polymorphisms have been implicated in susceptibility to tuberculosis (TB). However, a large number of studies have reported inconclusive results. This study was conducted to investigate the relationship of HLA-DRB1 gene polymorphisms and TB risk by a meta-analysis.
  
  
  METHODS
  A search was performed in Embase, PubMed, Wanfang Database, and China National Knowledge Internet (CNKI) up to Jul 30, 2014. Odds ratio (OR) and 95% confidence interval (95% CI) were used to assess the association. Statistical analyses were calculated by STATA 11.0 software.
  
  
  RESULTS
  All 31 articles involving 3,416 cases and 4,515 controls were identified. The pooled results indicated a significant association between HLA-DRB1*04 (OR 1.22, 95% CI 1.00-1.48, P = 0.048), *09 (OR 1.50, 95% CI 1.08-2.08, P = 0.016), *10 (OR 1.23, 95% CI 1.01-1.49, P = 0.035), *11 (OR 0.72, 95% CI 0.53-0.99, P = 0.044), *15 (OR 1.40, 95% CI 1.14-1.73, P = 0.001), and *16 (OR 1.33, 95% CI 1.08-1.63, P = 0.007) gene polymorphisms and TB risk. In addition, the results also show no significant association between HLA-DRB1*01 (P = 0.748), *03 (P = 0.947), *07 (P = 0.966), *08 (P = 0.440), *12 (P = 0.288), *13 (P = 0.241), and *14 (P = 0.551) gene polymorphisms and TB risk.
  
  
  CONCLUSIONS
  This study suggested that the HLA-DRB1*04, *09, *10, *15, and *16 gene polymorphisms may contribute to the risk of TB, especially in the East Asian. But the HLA-DRB1*11 gene polymorphism may be a protective factor for TB risk. Unfortunately, there is no significant association between the HLA-DRB1*01, *03, *07, *08, *12, *13, and *14 gene polymorphisms and TB risk.
authors: Department of Respiratory Medicine and Critical Care Medicine, West China Hospital/West China School of Medicine, Sichuan University, Guoxuexiang 37, Chengdu, 610041, Sichuan, China.
authors: Xiang
authors: X
authors: Tong
authors: Lingmin
authors: L
authors: Chen
authors: Sitong
authors: S
authors: Liu
authors: Zhipeng
authors: Z
authors: Yan
authors: Shifeng
authors: S
authors: Peng
authors: Yonggang
authors: Y
authors: Zhang
authors: Hong
authors: H
authors: Fan
mesh_terms: D020022:Genetic Predisposition to Disease; D059811:HLA-DRB1 Chains / Q000235:genetics*; D006801:Humans; D011110:Polymorphism, Genetic; D012307:Risk Factors; D014397:Tuberculosis, Pulmonary / Q000235:genetics*
chemical_list: D059811:HLA-DRB1 Chains; C527195:HLA-DRB1*04 antigen; C508422:HLA-DRB1*11 antigen; C507799:HLA-DRB1*15 antigen