RNA methylation pattern and immune microenvironment characteristics mediated by m6A regulator in ischemic stroke

Area of Science:

• Molecular Biology
• Immunology
• Neuroscience
• Epigenetics

Background:

• Ischemic stroke (IS) is a complex disease with a significant impact on the immune system.
• Epigenetic modifications, specifically N6-methyladenosine (m6A) RNA methylation, are increasingly recognized for their role in immune regulation.
• The interplay between IS and m6A immunoregulation remains underexplored, necessitating further investigation.

Purpose of the Study:

• To explore the relationship between m6A RNA methylation regulators and the immune microenvironment in ischemic stroke.
• To identify key m6A regulators with diagnostic significance for IS.
• To associate m6A modification patterns with immune cell infiltration and gene expression profiles in IS.

Main Methods:

• Analysis of differentially expressed m6A regulators in IS microarray datasets (GSE22255, GSE58294).
• Application of machine learning algorithms to identify and validate key IS-related m6A regulators.
• Correlation analysis of m6A modification patterns with immune microenvironment characteristics and development of an m6A score.

Main Results:

• METTL16, LRPPRC, and RBM15 demonstrated significant diagnostic value for IS across multiple datasets.
• Two distinct m6A modification modes were identified, correlating with acquired (high m6A) and innate (low m6A) immunity.
• Five immune-related hub genes (CD28, IFNG, LTF, LCN2, MMP9) were significantly associated with the m6A score.

Conclusions:

• m6A modification is intricately linked to the immune microenvironment in ischemic stroke.
• Distinct m6A modification patterns are associated with different types of immune responses.
• Quantifying individual m6A modification patterns could inform future immunomodulatory therapeutic strategies for IS.