RNA sequencing analysis between ruptured and un-ruptured brain AVM

Area of Science:

• Neuroscience
• Genomics
• Vascular Biology

Background:

• Brain arteriovenous malformations (BAVMs) are abnormal vascular connections increasing intracerebral hemorrhage (ICH) risk.
• RNA sequencing offers a transcriptome-wide approach to study disease mechanisms.
• Understanding BAVM rupture mechanisms is crucial for clinical management.

Purpose of the Study:

• To investigate the molecular mechanisms underlying BAVM rupture.
• To identify differentially expressed genes (DEGs) in ruptured versus un-ruptured BAVMs.
• To elucidate biological pathways associated with BAVM rupture.

Main Methods:

• RNA sequencing of 65 BAVM nidus samples (28 ruptured, 37 un-ruptured).
• Differential gene expression analysis to identify DEGs.
• Gene Ontology (GO) and KEGG pathway analysis for biological insights.
• Univariate Cox regression to identify early rupture-prone DEGs.

Main Results:

• 951 DEGs identified between ruptured and un-ruptured BAVMs (740 upregulated, 211 downregulated).
• Enriched pathways include inflammatory processes and extracellular matrix organization.
• Downregulated genes involved in cell adhesion and nervous system development.
• 125 genes correlated with early BAVM rupture, many linked to inflammation.

Conclusions:

• Upregulated genes in ruptured BAVMs are associated with inflammation and extracellular matrix remodeling.
• Downregulated genes relate to cell adhesion and myofibril assembly.
• BAVM rupture may result from enhanced inflammation and reduced vessel structural integrity.