Abstract:Objective To investigate the association of interleukin-17A (IL-17A) single nucleotide polymorphism (SNP) rs2275913 (G-197A) and rs4711998 (-877A/G) and the incidence of chronic heart failure (CHF) in Liaoning Han population. Methods A total of 131 CHF patients and 80 healthy people were involved in this research, and then the polymerase chain reaction-restriction fragment length polymorphism technique was applied to analyze the IL-17A gene SNP rs2275913 (G-197A) and rs4711998 (-877A/G). Results There were no differences between actual and expected gene frequency of IL-17A gene SNP rs2275913 and rs4711998 in both CHF group (P?>?0.05) and control group (P?>?0.05). The genotype frequency distribution of AA, AG and GG and the allele frequency distribution of A and G at rs2275913 locus were significantly different (P?0.05). The risk of CHF in those with genotype AA at rs2275913 locus was 4.410 (95% CI: 1.846, 10.535) times higher than that in those with genotype GG at rs2275913 locus (P?0.05). The allele frequency of A at the IL-17A gene SNP rs2275913 (G-197A) in the CHF group was higher than that in the control group (P?0.05). There was no correlation between IL-17A gene SNP rs4711998 (-877A /G) and CHF (P?>?0.05). Conclusions The IL-17A gene polymorphism at position rs2275913(G-197A) is associated with the occurrence of CHF, and A allele is the genetic susceptibility marker of some CHF patients. However, there is no correlation between rs4711998 (-877A /G) and CHF.