Quantifying miRNA Deregulation in Alzheimer's Disease.

Area of Science:

• Biochemistry
• Molecular Biology
• Neuroscience

Background:

• MicroRNAs (miRNAs) are key regulators of gene expression.
• Dysregulated miRNA expression is implicated in Alzheimer's disease (AD) pathogenesis.
• Circulating immune cells offer accessible biosamples for AD biomarker discovery.

Purpose of the Study:

• To describe a method for isolating CD14+ monocytes from human blood.
• To outline the process of RNA extraction, cDNA synthesis, and miRNA quantification.
• To facilitate the identification of differentially expressed miRNAs in AD patients.

Main Methods:

• Isolation of CD14+ monocytes from peripheral blood.
• Total RNA extraction, including small RNAs.
• Reverse transcription to complementary DNA (cDNA).
• Quantitative reverse transcription PCR (qRT-PCR) array analysis using 96- or 384-well plates.

Main Results:

• Successfully isolated CD14+ monocytes and extracted RNA.
• Quantified a pre-set panel of specific miRNAs.
• Demonstrated the feasibility of using qRT-PCR arrays for miRNA profiling in monocytes.

Conclusions:

• The described method enables robust miRNA expression analysis in monocytes.
• This technique is valuable for identifying potential miRNA biomarkers for Alzheimer's disease.
• Accessible biosamples and standardized methods are crucial for biomarker discovery in neurological disorders.