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Genome-Wide Expression Profile in People with Optic Neuritis Associated with Multiple Sclerosis
Mario Habek1, Antonela Blazekovic2,3, Kristina Gotovac Jercic2,4
1Department of Neurology, Referral Center for Autonomic Nervous System Disorders, University Hospital Centre Zagreb, 10000 Zagreb, Croatia.
Biomedicines
|August 26, 2023
Summary
This study analyzed gene expression in optic neuritis (ON) patients, finding 722 differently expressed genes. Key pathways implicated include T cell regulation and anti-inflammatory responses in the central nervous system (CNS).
Area of Science:
- Neuroimmunology
- Genomics
- Molecular Biology
Background:
- Optic neuritis (ON) is an inflammatory demyelinating disease of the optic nerve.
- Understanding the molecular mechanisms underlying ON is crucial for early diagnosis and treatment.
Purpose of the Study:
- To conduct a genome-wide expression analysis of whole-blood samples from individuals with acute optic neuritis (ON).
- To identify differentially expressed messenger RNAs (mRNAs) in ON patients compared to healthy controls.
- To explore the biological pathways implicated in ON pathogenesis.
Main Methods:
- Genome-wide gene expression profiling using DNA microarrays on whole-blood samples.
- Biostatistical analyses including Gene Ontology (GO) analysis and Gene Set Enrichment Analysis (GSEA).
- Validation of selected differentially expressed genes using quantitative reverse transcription PCR (qPCR).
Main Results:
- Identified 722 differentially expressed genes (377 increased, 345 decreased) in ON patients.
- GO and GSEA revealed involvement of protein phosphorylation, apoptosis inhibition, cell cycle pathways, T/B cell functions, and anti-inflammatory CNS pathways.
- qPCR confirmed differential expression of genes including SLPI, CR3, and ITGA4.
Conclusions:
- Whole-blood gene expression analysis reveals significant molecular differences in individuals with ON.
- Early phases of ON involve T cell regulation and anti-inflammatory pathways within the central nervous system (CNS).
- These findings contribute to understanding the early pathogenesis of multiple sclerosis (MS).
