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Properties of targeted preamplification in DNA and cDNA quantification
Daniel Andersson1, Nina Akrap, David Svec
1Sahlgrenska Cancer Center, Department of Pathology, Sahlgrenska Academy at University of Gothenburg, Box 425, 40530 Gothenburg, Sweden.
Expert Review of Molecular Diagnostics
|July 2, 2015
Summary
Optimizing targeted preamplification is key for accurate small molecule quantification. Including more primers and controlling reaction conditions significantly improves preamplification efficiency and specificity for downstream analysis.
Area of Science:
- Molecular Biology
- Biochemistry
Background:
- Accurate quantification of small molecules requires sufficient target amplification.
- Targeted preamplification is a crucial step for generating adequate target copies for downstream analysis.
Purpose of the Study:
- To investigate experimental parameters affecting targeted preamplification.
- To optimize preamplification for enhanced downstream quantitative real-time PCR (qPCR).
Main Methods:
- Real-time monitoring of preamplification using SYBR Green and melting curve analysis.
- Evaluation of individual targets by qPCR.
- Assessing effects of primer pool size, template number, primer concentration, annealing time, and temperature.
Main Results:
- Optimal preamplification achieved with a large primer pool.
- Efficiency, reproducibility, and specificity depend on template molecules, primer concentration, annealing time, and temperature.
- Nonspecific PCR products reduced ~1000-fold with additives (bovine serum albumin, glycerol, formamide).
Conclusions:
- Provides recommendations for robust and accurate targeted preamplification.
- Optimized preamplification enhances downstream qPCR and next-generation sequencing accuracy.
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