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Gene expression profiles in intracranial aneurysms.

Lanbing Yu1, Jinghan Fan, Shuo Wang

  • 1Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100050, China.

Neuroscience Bulletin
|January 17, 2014
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This study reveals key gene expression differences in intracranial aneurysms, highlighting pathways like inflammation and cell death. No significant differences were found between ruptured and unruptured aneurysms.

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Area of Science:

  • Genomics
  • Molecular Biology
  • Vascular Biology

Background:

  • Intracranial aneurysms are a significant cause of subarachnoid hemorrhage.
  • Understanding the molecular mechanisms underlying aneurysm formation is crucial for developing effective treatments.

Purpose of the Study:

  • To identify differentially expressed genes in intracranial aneurysms compared to superficial temporal artery samples.
  • To investigate the molecular pathways associated with intracranial aneurysm development.

Main Methods:

  • Genome-wide expression profiling was performed on 15 intracranial aneurysms and 17 superficial temporal artery samples using Affymetrix U133 Plus 2.0 GeneChip.
  • Significance analysis for microarrays (SAM) was used to identify differentially expressed genes.
  • Real-time polymerase chain reaction (PCR) was employed to validate the expression patterns of selected genes.

Main Results:

  • 3,736 differentially expressed genes were identified out of 47,000 assayed transcripts.
  • 179 genes exhibited a >10-fold change in expression between aneurysms and arterial samples.
  • Genes related to vascular smooth muscle cell proliferation, migration, apoptosis, atherosclerosis, extracellular matrix disruption, and inflammation were associated with aneurysm formation.

Conclusions:

  • Gene expression profiling provides insights into the molecular pathogenesis of intracranial aneurysms.
  • Key pathways involved in vascular remodeling, inflammation, and matrix degradation are implicated in aneurysm development.
  • No significant differences in gene expression were observed between unruptured and ruptured aneurysms.