Meta-analysis of microarray gene expression studies on intracranial aneurysms

Area of Science:

• Neurology
• Genomics
• Molecular Biology

Background:

• Intracranial aneurysms (IAs) are a major cause of neurological disability and death.
• Despite treatment advances, patient outcomes remain poor, suggesting a significant role for genetic factors.
• Genomic studies, particularly microarray gene expression analysis, are crucial for understanding IA development.

Purpose of the Study:

• To conduct a meta-analysis of existing microarray gene expression studies on intracranial aneurysms.
• To identify genes consistently altered in IA tissue compared to healthy controls.
• To pinpoint potential genetic markers and pathways involved in IA pathogenesis.

Main Methods:

• Systematic review and meta-analysis of five published microarray gene expression studies on intracranial aneurysms.
• Analysis of gene expression data from a total of 60 IA tissue samples (30 ruptured, 30 unruptured) versus control tissue.
• Functional pathway analysis to explore the biological relevance of identified genes.

Main Results:

• A total of 507 differentially expressed genes were identified across the studies.
• Fifty-seven genes showed altered expression in more than two studies.
• Seven genes (BCL2, COL1A2, COL3A1, COL5A2, CXCL12, TIMP4, TNC) were consistently altered in more than three studies, indicating strong potential involvement in IA genesis.

Conclusions:

• The meta-analysis highlights seven specific genes as highly likely contributors to the development of intracranial aneurysms.
• These identified genes represent promising targets for further research into the molecular mechanisms underlying IA formation and rupture.
• Understanding the role of these genes may lead to improved diagnostic or therapeutic strategies for IA patients.