Interleukin-1 and Interleukin-6 Polymorphisms Might Influence Predisposition to Hemorrhagic Cerebral Vascular Diseases: A Meta-Analysis.

Background: Interleukin-1 (IL-1) and IL-6 polymorphisms might influence predisposition to hemorrhagic cerebral vascular diseases, but the results of already published studies regarding relationship between IL-1/IL-6 polymorphisms and hemorrhagic cerebral vascular diseases were still controversial and ambiguous.

Objectives: The authors designed this meta-analysis to more precisely estimate the relationship between IL-1/IL-6 polymorphisms and hemorrhagic cerebral vascular diseases by pooling the results of already published related studies.

Methods: The authors searched PubMed, EMBASE, Web of Science, and CNKI for already published studies. Eighteen already published studies were pooled analyzed in this meta-analysis.

Results: The pooled meta-analyses' results showed that distributions of IL-1A rs1800587, IL-1B rs16944, and IL-6 rs1800796 polymorphisms among patients and controls differed significantly. Moreover, distribution of the IL-6 rs1800795 polymorphism among patients and controls from Asians also differed significantly. Further analyses showed similar findings for IL-1A rs1800587, IL-1B rs16944, and IL-6 rs1800796 polymorphisms in aneurysmal subarachnoid hemorrhage (aSAH) subgroup.

Conclusions: This meta-analysis suggested that IL-1A rs1800587, IL-1B rs16944, and IL-6 rs1800796 polymorphisms might influence susceptibility to hemorrhagic cerebral vascular diseases, especially for aSAH. Moreover, IL-6 rs1800795 might influence susceptibility to hemorrhagic cerebral vascular diseases in Asians.