DNA Methylation Regulates Gene Expression in Intracranial Aneurysms

Area of Science:

• Genomics
• Epigenetics
• Vascular Biology

Background:

• Intracranial aneurysms exhibit distinct gene expression profiles.
• Understanding gene regulation is key to elucidating aneurysm pathogenesis.
• Investigating DNA methylation's role in regulating gene expression in aneurysms.

Purpose of the Study:

• To investigate the role of DNA methylation in regulating gene expression in intracranial aneurysms.
• To identify specific genes and pathways affected by differential DNA methylation.

Main Methods:

• Comparison of 20 intracranial aneurysm tissues with 20 matched superficial temporal artery controls.
• Gene expression profiling using GeneChip Human U133 Plus 2.0 array.
• DNA methylation analysis using Infinium HumanMethylation450 BeadChip Kit.

Main Results:

• Identified 11,022 differentially methylated sites and 2142 differentially expressed gene transcripts.
• MYH11, LIFR, and TLR4 genes found to be associated with aneurysm occurrence and development.
• Affected genes are involved in cell adhesion and key signaling pathways (NF-κB, JAK-STAT, ERK/JNK).

Conclusions:

• DNA methylation significantly regulates gene expression in intracranial aneurysm development.
• Epigenetic mechanisms influence immune/inflammatory reactions, cell function, and signal transduction.
• Findings provide insights into the molecular mechanisms underlying intracranial aneurysm formation.