Identification of Electrophysiological Changes in Alzheimer's Disease: A Microarray Based Transcriptomics and...

Area of Science:

• Neuroscience
• Genomics
• Systems Biology

Background:

• Alzheimer's disease (AD) pathogenesis is extensively studied regarding amyloid beta and tau proteins.
• Electrophysiological activity and membrane transport in AD remain understudied.
• Electrophysiological processes link brain activity to cognition and show biomarker potential.

Purpose of the Study:

• To investigate the role of electrophysiological activity and membrane transport in Alzheimer's disease.
• To identify significant genes associated with electrophysiological pathways in AD.
• To explore interconnected molecular pathways in AD using a holistic systems biology approach.

Main Methods:

• Integrated and analyzed multiple AD expression datasets from the GEO database.
• Utilized Partek Genomic Suite for gene expression analysis to identify significantly expressed genes (p ≤ 0.05, fold change ≥ 2).
• Performed Ingenuity Pathway Analysis to determine interconnected canonical molecular pathways.

Main Results:

• Identified 200 significantly expressed genes in AD datasets.
• Found a majority of transporter genes to be downregulated.
• Highlighted key pathways including glutamate receptor signaling, CREB signaling, and synaptic long-term potentiation.

Conclusions:

• Downregulation of transporter genes is a significant finding in AD.
• Electrophysiological dysfunction in AD is correlated with altered signaling pathways.
• These pathways play a critical role in AD pathophysiology and link to electrophysiological dysfunction.