Decoding Common Features of Neurodegenerative Disorders: From Differentially Expressed Genes to Pathways

Area of Science:

• Genomics and Bioinformatics
• Neuroscience
• Molecular Biology

Background:

• Neurodegeneration involves progressive neuron loss, leading to disorders like Alzheimer's (AD), Parkinson's (PD), Frontotemporal Dementia (FTD), and Amyotrophic Lateral Sclerosis (ALS).
• These disorders share complex molecular and cellular defects impacting specific brain regions and neuronal populations.

Purpose of the Study:

• To conduct a comparative in silico analysis of gene expression datasets from AD, PD, FTD, and ALS.
• To identify common molecular features and gain insights into the shared pathophysiology of these neurodegenerative diseases.

Main Methods:

• Utilized gene expression data from four neurodegenerative disorders.
• Performed Differential Gene Expression (DEG) analysis and mapped findings to biological processes, KEGG pathways, and molecular functions.
• Conducted comparative analysis to identify commonalities across disease stages.

Main Results:

• Identified 106 differentially expressed genes common to all four disorders.
• Found 100 Gene Ontology (GO) terms and 7 KEGG pathways significantly enriched across all studied neurodegenerative diseases.
• Highlighted EGFR, CDC42, and CREBBP as key interacting nodes in gene-gene and protein-protein interaction networks.

Conclusions:

• Despite distinct clinical presentations, neurodegenerative disorders share underlying molecular commonalities.
• Recognizing these shared features provides evidence for convergence in the pathophysiology of diseases like AD, PD, FTD, and ALS.
• Further research into these commonalities can elucidate the complex molecular underpinnings of neurodegeneration.