Stabilization of mRNA expression in whole blood samples

Area of Science:

• Molecular Biology
• Genomics
• Biotechnology

Background:

• Accurate mRNA quantification in whole blood is challenging due to transcript degradation and gene induction during sample handling.
• Traditional methods using EDTA tubes are prone to RNA instability.
• This study evaluates a novel blood collection system for gene expression analysis.

Purpose of the Study:

• To compare the PAXgene Blood RNA System with traditional EDTA tubes for preserving mRNA integrity.
• To assess the impact of storage conditions on RNA stability in different collection tubes.
• To determine the suitability of the PAXgene system for gene expression profiling.

Main Methods:

• Parallel blood samples were collected from healthy donors into PAXgene tubes and EDTA tubes.
• RNA was extracted after storage for up to 90 days at various temperatures (room temperature, 4°C, 20°C).
• RNA integrity and specific mRNA concentrations were analyzed using Northern blot and reverse transcription-PCR (RT-PCR).

Main Results:

• EDTA tube samples showed significant changes in specific mRNA concentrations, indicating degradation.
• PAXgene tubes markedly reduced or eliminated mRNA degradation and induction.
• The stabilizing effect of PAXgene was consistent across samples from multiple donors.

Conclusions:

• The PAXgene Blood RNA System significantly reduces RNA degradation and inhibits gene induction in whole blood samples.
• PAXgene tubes offer a reliable method for collecting and storing blood for RNA analysis.
• This system is recommended for clinical samples requiring accurate total or specific RNA content assessment.