A Preliminary Report of the Relationship Between Gene Polymorphism of IL-8 and Its Receptors and Systemic Inflammatory Response Syndrome Caused by Wasp Stings.

The plasma levels of interleukin-8 (IL-8) and its receptors (CXCR1 and CXCR2) play a significant role in the development of systemic inflammatory response syndrome (SIRS), but it is not clear how these proteins are involved in wasp sting patients developing SIRS. To study potential genetic factors predisposing to the risk of SIRS caused by wasp sting injury, we determined the plasma levels of IL-8 and its receptors among SIRS patients with wasp sting injury and investigated the association of single-nucleotide polymorphisms of these genes with SIRS. A total of 225 patients were divided into the SIRS group (n = 62) and non-SIRS group (control, n = 163), and we associated polymorphisms in IL-8 [rs4073 (-251T>A), rs2227532 (-845C>T), rs2227307 (+396G>T), rs2227306 (+781T>C), CXCR1 rs2234671 (+860C>G), CXCR2 [rs2230054 (+811T>C), rs57929613 (+1235C>T), and rs60626131 (+1440A>G)] with SIRS with a linear additive model. In terms of protein expression, the IL-8, CXCR1, and CXCR2 plasma levels were significantly higher in the SIRS group than in the control group (p < 0.001). Significantly higher frequencies were observed for the IL-8 - 251T allele (AT+TT), CXCR2 + 811T allele (CT+TT), and +1235C allele (TC+CC) in the SIRS group, when compared with the control group, with odds ratio (OR) = 3.971 (95% confidence interval [CI], 1.618-9.734), p = 0.003; OR = 4.223 (95% CI, 1.863-9.571), p = 0.001; and OR = 4.012 (95% CI, 1.773-9.079), p = 0.001; respectively. In addition, SIRS is more likely to occur in males, patients with number of wasp stings ≥10 stings, and stings in the limbs. The current study suggests that the IL-8 - 251T allele (AT+TT) and IL-8 receptor CXCR2 + 811C allele (CT+TT) and +1235T allele (TC+CC) could be risk factors among SIRS patients with wasp sting injury.

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