Peripheral Blood Gene Expression Profiling Reveals Molecular Pathways Associated with Cervical Artery Dissection

Area of Science:

• Genetics
• Vascular Biology
• Stroke Research

Background:

• Cervical artery dissection (CeAD) is a leading cause of ischemic stroke in young adults.
• While monogenic causes are rare, sporadic CeAD often presents with systemic vasculopathy and undifferentiated connective tissue dysplasia.
• Previous genetic studies focused on non-coding variants, leaving global gene expression profiles unexamined.

Purpose of the Study:

• To investigate the global gene expression profile in peripheral blood of CeAD patients.
• To identify differentially expressed genes and associated biological pathways in CeAD.
• To explore potential molecular mechanisms underlying sporadic CeAD.

Main Methods:

• Bulk RNA sequencing was performed on peripheral blood samples from 19 CeAD patients and 18 healthy controls.
• Differential gene expression analysis was conducted to identify significant gene expression changes.
• Functional annotation, pathway analysis, gene-disease association, and protein-protein interaction analyses were employed.

Main Results:

• Significant dysregulation of protein-coding genes was observed in CeAD patients compared to controls.
• Identified correlations between CeAD and altered gene expression related to nucleolar stress, senescence-associated secretory phenotype, mitochondrial dysfunction, and epithelial-mesenchymal plasticity.
• Functional enrichment analysis highlighted key biological processes potentially involved in CeAD pathogenesis.

Conclusions:

• Global gene expression profiling provides new insights into the molecular underpinnings of CeAD.
• The findings suggest a role for cellular stress, aging, and tissue remodeling pathways in the development of CeAD.
• Further research into these gene expression signatures may lead to novel diagnostic or therapeutic strategies for CeAD.