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RNA Stability

RNA Stability

Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...

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Updated: Jun 10, 2026

Plant Sample Preparation for Nucleoside/Nucleotide Content Measurement with An HPLC-MS/MS

Plant Sample Preparation for Nucleoside/Nucleotide Content Measurement with An HPLC-MS/MS

Published on: February 24, 2021

Long-term stability of RNA nucleoside standards for accurate LC-MS quantification.

Kira Kerkhoff¹, Hagen Wesseling¹, Yuyang Qi¹

¹Goethe University Frankfurt, Institute of Pharmaceutical Chemistry, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany.

Nucleic Acids Research

|June 8, 2026

Summary

The chemical stability of 44 ribonucleosides stored at -80°C and -20°C was evaluated over 12 months. Most nucleoside standards remained stable, but several degraded, necessitating improved storage and quality control guidelines for RNA modification analysis.

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Last Updated: Jun 10, 2026

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Area of Science:

Biochemistry
Analytical Chemistry
Molecular Biology

Background:

Accurate RNA modification analysis using LC-MS requires high-integrity synthetic nucleoside standards.
Long-term chemical stability of these standards during storage is crucial but not well-understood.
Purity issues in nucleoside standards can impact qualitative and quantitative results.

Purpose of the Study:

To systematically evaluate the long-term storage stability of 44 canonical and modified ribonucleosides.
To identify nucleosides prone to degradation and characterize their degradation products.
To develop practical guidelines for the preparation, storage, and quality control of nucleoside standards for LC-MS analysis.

Main Methods:

Storage of 44 ribonucleosides in aqueous solution at -80°C and -20°C for 12 months.
Initial quality control using LC-UV-MS to confirm identity and purity.
Long-term monitoring of nucleoside integrity and degradation products via LC-UV-MS.
Quantum-chemical calculations to correlate reaction-free energies with observed stability.

Main Results:

30 out of 44 nucleosides remained stable over 12 months.
12 nucleosides showed substantial quantitative changes, and 7 formed detectable degradation products.
Purity issues like isomer contamination were identified in initial quality control.
Degradation pathways (deglycosylation, deamination, etc.) were investigated and correlated with stability.

Conclusions:

Nucleoside standard stability varies significantly, impacting LC-MS RNA modification analysis.
Recommendations for storage conditions and rigorous purity verification (UV spectroscopy, qNMR) are proposed.
Implementation of proposed guidelines can enhance the robustness and inter-laboratory comparability of RNA modification studies.