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Original Article

 

Association Between Polymorphisms in IL17F and Male Asthma in a Chinese Population

 

F Qian,1* Q Zhang,2* L Zhou,3 G Ma,1 G Jin,4 Q Huang,5 K Yin3

1Department of Respiratory Medicine, Affi liated Hospital, Jiangsu University, Zhenjiang, Jiangsu, China
2Department of Respiratory Medicine, Affi liated Changzhou No.2 People’s Hospital, Nanjing Medical University, Changzhou, China
3Department of Respiratory Medicine, First Affi liated Hospital, Nanjing Medical University, Nanjing, China
4Department of Epidemiology and Biostatistics, Cancer Research Center, Nanjing Medical University, Nanjing, China
5Department of Otolaryngology, Affi liated Hospital, Jiangsu University, Zhenjiang, Jiangsu, China
6These authors contributed equally to the article.

J Investig Allergol Clin Immunol 2012; Vol. 22(4): 257-263

 

 Abstract


Background and Objectives: Interleukin (IL) 17F is a marker of type 17 helper T cells and has a proinflammatory role in asthma. The aim of the present study was to assess the possible association between asthma and polymorphisms in the IL17F gene in a Chinese population.

Methods: A total of 318 asthmatic patients and 352 nonasthmatic controls were recruited. Two single-nucleotide polymorphisms in IL17F (rs763780 and rs13209590) were detected using GenomeLab SNPstream. Logistic regression methods were used to analyze data.

Results: A significantly lower frequency of the C allele in rs763780 was observed in the control group (P=.0148). The rs763780 TC heterozygote was associated with an increased risk of asthma, and a similar trend was observed assuming a codominant genotype effect (adjusted OR, 1.58; 95% CI, 1.06-2.36; P=.0148; adjusted OR, 1.64; 95% CI, 1.10-2.45; P=.0217). Furthermore, a novel finding of the present study was that this association was exclusive to males (adjusted OR, 1.79; 95% CI, 1.06-3.05; P=.0308) and patients with higher immunoglobulin E levels (≥ 1.85 IU/mL) (adjusted OR, 1.88; 95% CI, 1.10-3.22; P=.0213). We also found that the haplotype with minor alleles for rs763780 was associated with an increased risk of asthma (adjusted OR, 1.62; 95% CI, 1.11-2.35; P=.0115).

Conclusions: Our findings indicated that polymorphisms might play a role in susceptibility to asthma.

Key words: Asthma. IgE. Interleukin 17F. Single-nucleotide polymorphism.