RNA integrity and the effect on the real-time qRT-PCR performance

Area of Science:

• Molecular Biology
• Genomics
• Biotechnology

Background:

• RNA integrity is essential for accurate gene expression analysis.
• Low-quality RNA can compromise expensive and time-consuming downstream applications.
• Automated capillary electrophoresis systems are becoming standard for RNA quality assessment.

Purpose of the Study:

• To analyze the importance of RNA quality for quantitative real-time PCR (qRT-PCR).
• To compare different RNA analysis systems.
• To correlate RNA integrity with PCR performance and efficiency.

Main Methods:

• Determined RNA quality in various bovine tissues and cell cultures.
• Compared OD measurement, NanoDrop, Bioanalyzer 2100, and Experion systems.
• Correlated total RNA integrity with PCR performance and efficiency.

Main Results:

• qRT-PCR performance is significantly affected by RNA integrity.
• PCR efficiency is generally not affected by RNA integrity.
• A RNA Integrity Number (RIN) higher than five indicates good RNA quality, while a RIN higher than eight signifies perfect quality for downstream applications.

Conclusions:

• RNA integrity is a critical factor for successful qRT-PCR.
• Specific RIN thresholds can guide the selection of suitable RNA for molecular analyses.
• Choosing appropriate RNA quality ensures the validity and reliability of gene expression studies.