RNA Profiling in Peripheral Blood Cells by Fluorescent Differential Display PCR
The differential display-polymerase chain reaction (DD-PCR) technique is a unique, sequence independent tool for mRNA profiling and relative quantification. It is particularly suited for clinical samples yielding limited amounts of RNA. Unlike closed systems like microarray-based platforms, DD-PCR can be used to detect expression changes in known and novel transcripts, alternate splice products and to identify non-human transcripts. This chapter details fluorescent DD-PCR protocols that were optimized for peripheral blood mononuclear cells (PBMC). Subpopulations of mRNAs are reverse transcribed with two-base anchored oligo dT primers, amplified in combination with arbitrary primers and after gel separation visualized by fluorescent tags on the primers. Besides the DD-PCR itself, methods are described for subsequent extraction, amplification, and sequencing of DNA from bands of interest to identify the corresponding genes.
Key WordsDifferential display PCR fluorescent detection blood RNA profiling PBMC
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