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Quantification of mRNA using real-time reverse transcription PCR (RT-PCR): trends and problems.

Journal of Molecular Endocrinology

Templates, Genetic, Sensitivity and Specificity, Reverse Transcriptase Polymerase Chain Reaction, metabolism, RNA, Messenger, RNA Probes, RNA, Peptide Nucleic Acids

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      Abstract

      The fluorescence-based real-time reverse transcription PCR (RT-PCR) is widely used for the quantification of steady-state mRNA levels and is a critical tool for basic research, molecular medicine and biotechnology. Assays are easy to perform, capable of high throughput, and can combine high sensitivity with reliable specificity. The technology is evolving rapidly with the introduction of new enzymes, chemistries and instrumentation. However, while real-time RT-PCR addresses many of the difficulties inherent in conventional RT-PCR, it has become increasingly clear that it engenders new problems that require urgent attention. Therefore, in addition to providing a snapshot of the state-of-the-art in real-time RT-PCR, this review has an additional aim: it will describe and discuss critically some of the problems associated with interpreting results that are numerical and lend themselves to statistical analysis, yet whose accuracy is significantly affected by reagent and operator variability.

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