Twenty-five years of quantitative PCR for gene expression analysis

Area of Science:

• Molecular Biology
• Genomics
• Biotechnology

Background:

• Polymerase Chain Reaction (PCR) has evolved significantly over 25 years.
• Reverse-transcription quantitative PCR (RT-qPCR) is crucial for gene expression analysis in the post-genome era.
• BioTechniques journal has consistently supported advancements in qPCR technology, experimental design, and data analysis.

Purpose of the Study:

• To review the current status of qPCR for gene expression analysis.
• To discuss fluorescent reporter technologies and endogenous control selection in real-time qPCR.
• To clarify data analysis methods for qPCR to enhance understanding.

Main Methods:

• Examination of fluorescent reporter technologies used in real-time qPCR.
• Discussion on the selection criteria for endogenous controls.
• Presentation of a conceptual framework for qPCR data analysis.

Main Results:

• Real-time qPCR has become a standard, robust method for gene expression measurement, microarray validation, and biomarker monitoring.
• It has largely replaced older techniques like Northern blotting and RNase protection assays.
• The review provides insights into current qPCR methodologies and analysis.

Conclusions:

• qPCR is a mature and indispensable tool for gene expression analysis.
• Understanding fluorescent reporters, control selection, and data analysis is key for accurate results.
• Future developments promise faster, cheaper, and higher-throughput qPCR applications.