Prevalence of Genetic Polymorphism on RNF 213 rs 112735431 Gene in Non-Cardioembolic Ischemic Cerebrovascular Disease: A Cross-Sectional Study in Thai Patients
Abstract:
Background: Stroke is the common cause of death and acquired adult disability in Thailand. The sites of cerebral artery stenosis are known to differ by Caucasians and Asians. In addition to atherosclerotic risk factors, genetics could play a roles in determining the site of cerebral artery stenosis. Moyamoya disease is characterized by progressive bilateral occlusion of the supraclinoid internal carotid artery. Moyamoya is associated with ring finger protein 213 gene polymorphism rs 112735431. In this study, we investigated the prevalence of genetic polymorphism on RNF213 rs112735431 gene in non-cardioembolic ischemic cerebrovascular disease in Thailand. Method: A cross-sectional study was conducted in acute non-embolic ischemic stroke patients, aged 18 years or over, who had admitted at King Chulalongkorn Memorial Hospital between June, 2015 to March, 2016. Of 234 acute non-embolic ischemic stroke, 113 was found to have intracranial cerebral artery stenosis, 12 had extracranial cerebral artery stenosis, 20 had both extracranial and intracranial cerebral artery stenosis and 89 had no evidence of cerebral artery stenosis by duplex ultrasound or computed tomography angiography or magnetic resonance angiography. All of blood samples were genotyped using targeted Sanger sequencing. Results: Of 234 patients, genetic polymorphism on RNF213 rs112735431 gene, heterogenous A/G variant was detected in 2 paients. None was homozygote. The genetic polymorphism on RNF213 rs112735431 was detected at genotype frequencies of 0.9% (2/234; 95 % confidence interval (CI), 0-2.1%) in acute non-embolic stroke patients. All patients with RNF213 variant were male, no family history of ischemic stroke, hypertension, diabetes mellitus, dyslipidemia, intracranial cerebral artery stenosis and the average age was 57.5±7.8. Conclusion: In this study, the prevalence of genetic polymorphism on RNF213 rs112735431 gene in non-cardioembolic ischemic cerebrovascular disease is 0.9%