Association between a functional interleukin 6 receptor genetic variant and the risk and functional outcome of large artery atherosclerotic stroke.

Purpose: To investigate whether the Asp358Ala of interleukin 6 receptor related to the risk and outcome of large artery atherosclerotic (LAA) stroke in Han Chinese. Materials and methods: A prospective cohort study was conducted on 768 patients with LAA stroke and 686 non-stroke controls. The genotypes of Asp358Ala polymorphism were determined using SNPscan technology. Associations between genotypes and the risk of LAA stroke were analyzed with logistic regression model. Results: CC genotype (P < 0.001) and AC genotype (P = 0.023) decreased the risk of LAA stroke compared with AA genotype. Multivariate logistic regression analysis revealed that CC genotype was significantly associated with the risk of LAA stroke (P = 0.002). In the subgroup analyses, polymorphisms of Asp358Ala were significantly associated with the risk of LAA stroke in additive model, dominant model and recessive model (P = 0.009, P = 0.017, P = 0.012, respectively) for male, but not for female. Further regression analysis showed that compared with participants with AA genotype and obesity, participants with CC genotype and non-obesity were less likely to suffer LAA stroke (P = 0.003). For male participants, these associations were still existed (additive model, P = 0.022). After 3-month follow-up, patients with C allele had good functional prognosis compared with patients with A allele (P = 0.009). Conclusion: The study demonstrated that the Asp358Ala polymorphism might be associated with susceptibility to the development and outcome of LAA stroke in Han Chines [ABSTRACT FROM AUTHOR]