Intracranial Arterial Stenosis beyond Atherosclerosis: Insights from RNF213
1Department of Neurology, National Hospital Organization Osaka National Hospital.
Journal of Atherosclerosis and Thrombosis
|June 3, 2026
Summary
Intracranial arterial stenosis involves more than atherosclerosis, including genetic factors like RNF213-related vasculopathy. Understanding this vascular heterogeneity is key for better stroke classification and treatment.
Area of Science:
- Neurology
- Genetics
- Vascular Biology
Background:
- Intracranial arterial stenosis is a leading cause of ischemic stroke, especially in Asia.
- Traditionally attributed to atherosclerosis, non-atherosclerotic causes like dissection and moyamoya disease are increasingly recognized.
- Phenotypic overlap complicates diagnosis, suggesting a spectrum of vascular disorders.
Purpose of the Study:
- To review intracranial arterial stenosis beyond the atherosclerosis paradigm.
- To discuss emerging concepts of vascular heterogeneity and genetic factors.
- To explore implications for disease classification and personalized medicine.
Main Methods:
- Narrative review of current literature.
- Synthesis of evidence on non-atherosclerotic arteriopathies.
- Discussion of genetic susceptibility (e.g., RNF213) and environmental factors.
Main Results:
- Intracranial arterial stenosis encompasses diverse etiologies beyond atherosclerosis.
- RNF213-related vasculopathy represents a significant non-atherosclerotic contributor.
- A two-hit model integrating genetic and environmental factors is proposed.
Conclusions:
- Intracranial arterial stenosis is a heterogeneous condition requiring a broader diagnostic framework.
- Genetic factors and environmental interactions play crucial roles in pathogenesis.
- Integrating these concepts may lead to improved classification and individualized therapies for stroke prevention.