Background: Several studies illustrated that IL-23/Th17 axis could be an important pro-inflammatory pathway in atherosclerosis. As a key element in this inflammatory mechanism, interleukin-23 receptor (IL-23R) may play a critical role in the pathological process of atherosclerosis. Single nucleotide polymorphisms (SNPs) in IL-23R have recently been consistently found to be associated with atherosclerosis diseases. However, its association with acute coronary syndrome (ACS) is still indistinct. Here, we discussed whether genetic polymorphisms in IL-23R (rs11209026 G/A) were associated with susceptibility to ACS. Methods: Among 160 patients with ACS, it includes 80 patients with unstable angina pectoris (UAP), 80 patients with myocardial infarction (MI), and 80 control subjects were selected randomly. The polymorphisms of IL-23R (rs11209026 G/A) were analyzed by the Sanger method. Results: Data showed that percentages of rs11209026 AG genotypes were significantly lower in ACS group (including: UAP and MI) than in controls (odds ratio [OR] = 0.324, 95% confidence interval [CI]: 0.148 - 0.712, p = 0.005; OR = 0.351, 95% CI: 0.135 - 0.910, p = 0.031; OR = 0.303, 95% CI: 0.112 - 0.817, p = 0.018, respectively). Furthermore, there was no correlation between rs11209026 G/A SNP and dyslipidemia-associated ACS. Conclusions: The variant of the rs11209026 polymorphism in IL-23R gene might decrease the risk of ACS, and these data suggest that AG genotype of the rs11209026 G/A polymorphism may act as a protective factor for acute coronary syndrome and subtype of ACS.
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