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Optimized Quantitative Assessment of Enhancer RNA Stability in Mouse Embryonic Stem Cells
Published on: November 21, 2025
Time course analysis of RNA stability in human placenta
Isabelle Fajardy1, Emmanuelle Moitrot, Anne Vambergue
1Centre de Biologie Pathologie, Pôle de Biochimie et Biologie Moléculaire, CHRU de Lille, Université Lille 2, France. i-fajardy@chru-lille.fr
BMC Molecular Biology
|March 17, 2009
Summary
Human placenta samples can be stored for 48 hours at 4°C without impacting RNA quality for gene expression analysis. Direct tissue handling into RNA-stabilizing solution (RNAlater) ensures better RNA integrity than dissection prior to storage.
Area of Science:
- Molecular Biology
- Genomics
- Biotechnology
Background:
- RNA quality is critical for accurate gene expression analysis, especially for quantitative real-time PCR (qRT-PCR).
- Degraded RNA samples can lead to misinterpretation of expression levels and affect assay performance.
- Standardized protocols are needed to ensure RNA integrity and stability during sample handling and storage.
Purpose of the Study:
- To systematically evaluate how RNA quality affects qRT-PCR assay performance using human placenta samples.
- To compare two different tissue handling protocols (direct transfer vs. dissection) on RNA yield, integrity, and stability over time.
- To determine optimal storage conditions for preserving RNA quality for downstream gene expression analysis.
Main Methods:
- Human placenta tissues were processed using two protocols: direct transfer to RNA-stabilizing solution (RNAlater) (Protocol A) or dissection before biobanking (Protocol B).
- Samples were stored at +4°C for a progressive time course up to 4 days.
- RNA yield, total RNA integrity (RIN), mRNA integrity, and stability were tested and compared between protocols and storage durations.
Main Results:
- Long-term storage (up to 48 hours) had minimal impact on total RNA and mRNA integrity but altered stress-responsive gene transcript levels (TNF-alpha, COX2).
- Dissection prior to RNA processing (Protocol B) resulted in lower RNA integrity (RIN 4.5-6.05) compared to direct transfer to RNAlater (Protocol A) (RIN 6.44-7.22).
- The housekeeping gene B2M demonstrated the highest stability among those tested.
Conclusions:
- Human placenta samples can be stored at +4°C for up to 48 hours before RNA extraction without compromising RNA quality.
- Rapid tissue handling without dissection and immediate use of RNA-stabilizing solution (RNAlater) are crucial for obtaining high RNA integrity and stability.
- These findings support optimized sample preparation for reliable gene expression studies using qRT-PCR.
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