title: Correlation analysis between single nucleotide polymorphisms of pulmonary surfactant protein A gene and pulmonary tuberculosis in the Han population in China.
abstract: OBJECTIVE
  To investigate the correlation of single nucleotide polymorphisms (SNPs) in SFTPA1 and SFTPA2 genes encoding pulmonary surfactant protein A (SP-A) with the susceptibility to pulmonary tuberculosis (PTB) in the Han population in China.
  
  
  METHODS
  This study included 248 patients with active PTB (case group) and 124 normal individuals (control group). SNPs at loci aa19, aa50, aa62, aa133, and aa219 of SFTPA1, and at loci aa9, aa91, aa140, and aa223 of SFTPA2 were analyzed with PCR. Multivariate logistic regression analysis was used to identify the correlation of age, sex, and SNPs with PTB.
  
  
  RESULTS
  The frequencies of the G allele at aa91 and T allele at aa140 in SFTPA2 were significantly higher in the case group than in the control group (p=0.0002 and p=0.045). The distribution of haplotype CGAAC in SFTPA1 was significantly lower in the case group than in the control group (p=0.025). In SFTPA2, the distributions of haplotypes 1A(6), 1A(10), 1A(9), and 1A(2) were higher (all p<0.05), but the distributions of haplotypes 1A(13), 1A(5), and 1A(12) were lower in the case group than in the control group (all p<0.05). When SFTPA1 and SFTPA2 were combined and analyzed, haplotype 6A(11)-1A(8) was only found in the case group (4.1%, p=0.001 compared with the control group), but the distribution of haplotype CGAAC-1A(0) or 6A(4)-1A(12) was significantly lower in the case group than in the control group (all p<0.05).
  
  
  CONCLUSIONS
  SNP in SP-A is associated with PTB in the Han population in China. The G allele at aa91, T allele at aa140, and haplotype 6A11-1A8 are risk factors for PTB, but haplotype CGAAC-1A(0) and 6A(4)-1A(12) are protective factors for PTB.
authors.affiliation: Reproductive Medical Center, the First Affiliated Hospital of Zhengzhou University, Constructive East Road, Zhengzhou 450052, China.
authors.forename: Hong-yi
authors.initials: HY
authors.lastname: Yang
authors.affiliation: Tuberculosis Reference Laboratory, Henan Center for Disease Control and Prevention, Zhengzhou, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Li
authors.affiliation: Department of Pathology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
authors.forename: Yi-ge
authors.initials: YG
authors.lastname: Wang
authors.affiliation: Reproductive Medical Center, the First Affiliated Hospital of Zhengzhou University, Constructive East Road, Zhengzhou 450052, China.
authors.forename: Chao-yang
authors.initials: CY
authors.lastname: Xu
authors.affiliation: Tuberculosis Reference Laboratory, Henan Center for Disease Control and Prevention, Zhengzhou, China.
authors.forename: Yu-ling
authors.initials: YL
authors.lastname: Zhao
authors.affiliation: Tuberculosis Reference Laboratory, Henan Center for Disease Control and Prevention, Zhengzhou, China.
authors.forename: Xiao-guang
authors.initials: XG
authors.lastname: Ma
authors.affiliation: Department of Cell Biology and Medical Genetics, College of Basic Medical Sciences, Zhengzhou University, 100, Science Road, High-tech District, Zhengzhou 450001, China. Electronic address: zdxw55@163.com.
authors.forename: Xiao-wen
authors.initials: XW
authors.lastname: Li
authors.affiliation: Department of Cell Biology and Medical Genetics, College of Basic Medical Sciences, Zhengzhou University, 100, Science Road, High-tech District, Zhengzhou 450001, China. Electronic address: chenhui@zzu.edu.cn.
authors.forename: Hui
authors.initials: H
authors.lastname: Chen
mesh_terms: D000328:Adult; D000483:Alleles; D016022:Case-Control Studies; D002681:China / Q000208:ethnology; D005260:Female; D020022:Genetic Predisposition to Disease; D006239:Haplotypes; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D037662:Pulmonary Surfactant-Associated Protein A / Q000235:genetics*; D014397:Tuberculosis, Pulmonary / Q000235:genetics*
chemical_list: D037662:Pulmonary Surfactant-Associated Protein A; C445842:SFTPA1 protein, human; C445843:SFTPA2 protein, human
keywords: Han population; Pulmonary surfactant protein A; Pulmonary tuberculosis; Single nucleotide polymorphisms