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Chitosan-Functionalized Magnetic Graphene Oxide Nanocomposites Enable High-Purity mRNA Enrichment To Avoid False
Yue Wang1, Jian-Feng Sun1, Heng-Tao Fu1
1State Key Laboratory of Mechanism and Quality of Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau 999078, China.
Analytical Chemistry
|January 27, 2026
Summary
Researchers developed novel magnetic nanocomposites to isolate pure messenger RNA (mRNA), significantly reducing ribosomal RNA (rRNA) contamination for accurate modification analysis and advanced therapeutics.
Area of Science:
- Biotechnology and Nanomaterials Science
- Molecular Biology and Genomics
- Chemical Engineering and Surface Chemistry
Background:
- Messenger RNA (mRNA) modifications are critical for post-transcriptional regulation and therapeutic applications.
- Conventional mRNA isolation methods are often contaminated with ribosomal RNA (rRNA), hindering accurate analysis.
- There is a need for advanced techniques to achieve ultrapure mRNA for research and development.
Purpose of the Study:
- To develop a novel platform for highly efficient and pure mRNA isolation.
- To reduce ribosomal RNA (rRNA) contamination during mRNA enrichment.
- To enable sensitive mRNA modification profiling for downstream applications.
Main Methods:
- Chitosan-functionalized magnetic graphene oxide nanocomposites (Fe3O4/GO/CS) were synthesized.
- The nanocomposites utilize tailored surface properties for selective mRNA capture via oligo(dT) probes.
- Differential electrostatic and π-π stacking interactions were employed to separate mRNA from rRNA.
Main Results:
- Fe3O4/GO/CS demonstrated 1.5-fold higher mRNA enrichment efficiency than commercial kits.
- Residual rRNA contamination (18S and 28S) was reduced to below 1% after isolation.
- High-purity mRNA enabled sensitive liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis of modifications.
Conclusions:
- The Fe3O4/GO/CS platform provides an effective sample preparation method for mRNA modification analysis.
- Reduced rRNA contamination minimizes false-positive identifications in modification profiling.
- The developed method yields high-quality mRNA suitable for next-generation diagnostics and therapeutics.
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