Association of Ring Finger Protein 213 Gene P.R4810k Polymorphism with Intracranial Major Artery Stenosis/Occlusion.

BACKGROUND

Intracranial major artery stenosis/occlusion (ICASO) is a common cause of ischemic stroke worldwide. A number of studies have assessed the association of the p.R4810K polymorphism in the ring finger protein 213 (RNF213) gene with ICASO, but the results have not been entirely consistent.

METHODS

We conducted a case-control study to estimate the association between the p.R4810K polymorphism and the risk of ICASO in a Chinese population. A total of 124 patients and 230 controls were enrolled. Moreover, a meta-analysis was performed to evaluate this association in the East Asian populations.

RESULTS

In our case-control study, the frequencies of the G/A genotype of p.R4810K were significantly higher in the ICASO patients than in the control group (4.03% versus .43%, P = .021, respectively). Moreover, in the meta-analysis, we assessed 7 case-control studies that included 1239 patients and 1377 controls. The pooled odds ratios (ORs) indicated significant association between the p.R4810K polymorphism and the ICASO risk in the dominant model (OR = 9.37, 95% confidence interval: 4.61-19.02, P = .000), the heterozygote comparison (OR = 8.97, 95% CI: 4.41-18.25, P = .000), and the allele comparison (OR = 9.50, 95% confidence interval: 4.71-19.19, P = .000) in the East Asian populations. Subgroup analysis based on ethnicity revealed that the risks in the Japanese and the Korean populations were higher than that in the Chinese population.

CONCLUSIONS

The p.R4810K polymorphism was associated with an increased risk of ICASO in the East Asian populations. Further studies on the function of the RNF213 protein and the clinical features of this subtype of ICASO are needed.