title: Association between polymorphisms in ADAM33, CD14, and TLR4 with asthma in the Uygur population in China.
abstract: We evaluated the associations between single nucleotide polymorphisms (SNPs) and haplotypes of the genes encoding a disintegrin and metalloproteinase 33 (ADAM33), cluster of differentiation 14 (CD14), and Toll-like receptor 4 (TLR4) and the susceptibility of developing specific adult phenotypes of bronchial asthma in a Chinese Uygur population. Five SNPs of ADAM33 (T1, T2, and V4), 3 SNPs of CD14 (-1359G/T, -1145G/A, and -159T/C), and 2 SNPs of TLR4 (-896A/G and -1196C/T) were genotyped in a Chinese Uygur sample of 126 adult asthmatic patients and 126 control subjects. Gene polymorphisms were detected by polymerase chain reaction-restriction fragment length polymorphism analysis. The genotyping results were confirmed in a random subgroup of our samples using direct DNA sequencing. The allele frequencies of ADAM33 T1 (TC), T2 (AG), and V4 (GG) were significantly higher in patients than in controls (P<0.05). The genotypes T1 (TC+CC), T2 (AG+AA), and V4 (CG+GG) significantly increased the risk of asthma. After adjusting for confounding factors, these associations were stronger and remained significant. The T1 (TC) and V4 (GG) genotypes in the ADAM33 gene were associated with significantly decreased FEV1 levels in patients with asthma. The haplotype frequencies of Hap3 (CAC) and Hap4 (CAG) were significantly higher in patients than in controls (P<0.05). Our results suggest that polymorphisms T1, T2, and V4 in ADAM33 may contribute to the susceptibility to asthma. Specific haplotypes of ADAM33 may contribute to a higher susceptibility to asthma in the Chinese Uygur population.
authors.affiliation: Department of Respiratory Medicine, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China.
authors.forename: J
authors.initials: J
authors.lastname: Wang
authors.affiliation: Department of Respiratory Medicine, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China.
authors.forename: M
authors.initials: M
authors.lastname: Simayi
authors.affiliation: Department of Respiratory Medicine, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China.
authors.forename: Q
authors.initials: Q
authors.lastname: Wushouer
authors.affiliation: Department of Respiratory Medicine, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Xia
authors.affiliation: Department of Respiratory Medicine, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China.
authors.forename: Y
authors.initials: Y
authors.lastname: He
authors.affiliation: Department of Respiratory Medicine, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China.
authors.forename: F
authors.initials: F
authors.lastname: Yan
authors.affiliation: Department of Pathophysiology, Xinjiang Medical University, Urumqi, Xinjiang, China.
authors.forename: J
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Department of Respiratory Medicine, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China.
authors.forename: S
authors.initials: S
authors.lastname: Cui
authors.affiliation: Xinjiang Key Laboratory of Echinococcosis and Medical Research Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China haowen59@163.com.
authors.forename: H
authors.initials: H
authors.lastname: Wen
mesh_terms: D051722:ADAM Proteins / Q000235:genetics*; D000293:Adolescent; D000328:Adult; D000368:Aged; D044466:Asian People / Q000208:ethnology / Q000235:genetics*; D001249:Asthma / Q000235:genetics*; D016022:Case-Control Studies; D002681:China / Q000208:ethnology; D005260:Female; D056726:Genetic Association Studies; D020022:Genetic Predisposition to Disease; D006801:Humans; D018950:Lipopolysaccharide Receptors / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D051197:Toll-Like Receptor 4 / Q000235:genetics*; D055815:Young Adult
chemical_list: D018950:Lipopolysaccharide Receptors; C495345:TLR4 protein, human; D051197:Toll-Like Receptor 4; D051722:ADAM Proteins; C450441:ADAM33 protein, human