Post Stroke Motor Recovery Genome Wide Association Study: A Domain-Specific Approach

Area of Science:

• Neuroscience
• Genetics
• Stroke Research

Background:

• Motor recovery after stroke is a critical area of research.
• Identifying genetic factors influencing motor recovery can improve patient outcomes.
• Previous genetic studies have not specifically focused on motor recovery post-stroke.

Approach:

• A genome-wide association study (GWAS) was conducted using the Vitamin Intervention for Stroke Prevention (VISP) dataset.
• Logistic regression models with generalized estimating equations (GEE) analyzed longitudinal motor score data from 2,100 patients.
• Strict quality control and imputation were applied to genotyped data.

Key Points:

• No genome-wide significant associations were found, but 115 suggestive single nucleotide polymorphism (SNP) associations (p < 5 × 10^-6) were detected.
• Multiple SNP clusters were identified near genes involved in neuronal repair, including CLDN23, which influences blood-brain barrier integrity.
• This study represents the first motor-specific post-stroke recovery GWAS.

Conclusions:

• Novel suggestive genetic associations with motor recovery post-stroke were identified.
• The findings suggest a distinct stroke recovery phenotype compared to studies using broader outcome measures.
• Further replication and mechanistic studies are warranted, and the approach demonstrates efficient use of longitudinal data for genetic discovery.