Preamplification techniques for real-time RT-PCR analyses of endomyocardial biopsies

BMC Molecular Biology
Michel NoutsiasKatja Kotsch

Abstract

Due to the limited RNA amounts from endomyocardial biopsies (EMBs) and low expression levels of certain genes, gene expression analyses by conventional real-time RT-PCR are restrained in EMBs. We applied two preamplification techniques, the TaqMan(R) PreAmp Master Mix (T-PreAmp) and a multiplex preamplification following a sequence specific reverse transcription (SSRT-PreAmp). T-PreAmp encompassing 92 gene assays with 14 cycles resulted in a mean improvement of 7.24 +/- 0.33 Ct values. The coefficients for inter- (1.89 +/- 0.48%) and intra-assay variation (0.85 +/- 0.45%) were low for all gene assays tested (<4%). The PreAmp uniformity values related to the reference gene CDKN1B for 91 of the investigated gene assays (except for CD56) were -0.38 +/- 0.33, without significant differences between self-designed and ABI inventoried Taqman(R) gene assays. Only two of the tested Taqman(R) ABI inventoried gene assays (HPRT-ABI and CD56) did not maintain PreAmp uniformity levels between -1.5 and +1.5. In comparison, the SSRT-PreAmp tested on 8 self-designed gene assays yielded higher Ct improvement (9.76 +/- 2.45), however was not as robust regarding the maintenance of PreAmp uniformity related to HPRT-CCM (-3.29 +/- 2.40; p < 0.0001),...Continue Reading

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Citations

Dec 22, 2009·Herz·Michel NoutsiasBernhard Maisch
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Methods Mentioned

BETA
biopsies
PCR
blood drawing

Software Mentioned

ClustalX
Primer Express
PreAmp
SSRT
JMP Statistical Discovery
Oligo

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