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Updated: Sep 19, 2025
Identification and Quantification of Deranged Metabolites in Critically Ill Patients Using NMR-Based Metabolomics
Published on: November 29, 2024
IsomiR stoichiometry changes as disease biomarkers.
Alexandra L McAllan1,2, Katherine A Pillman3,4, Linden J Gearing1,2
1Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton, VIC 3168, Australia.
Analyzing microRNA (miRNA) isoform variants, or isomiRs, reveals novel biomarkers for inflammation and COVID-19. This approach overcomes single miRNA limitations and offers built-in expression normalization for improved diagnostics.
Area of Science:
- Biochemistry
- Molecular Biology
- Genomics
Background:
- MicroRNAs (miRNAs) show promise as non-invasive biomarkers but lack disease specificity and exhibit variable expression.
- Current diagnostic approaches often aggregate miRNA isoforms, potentially missing crucial disease-specific information.
Purpose of the Study:
- To investigate the diagnostic potential of miRNA isoform (isomiR) stoichiometry variations.
- To develop a method for identifying isomiR biomarkers with inherent normalization capabilities.
Main Methods:
- Analysis of miRNA isomiR expression profiles.
- Leveraging variations in isomiR stoichiometry for biomarker discovery.
- Utilizing one isomiR to normalize the expression of another from the same miRNA.
Main Results:
- IsomiR-level analysis identified putative biomarkers missed by aggregated miRNA analysis.
- Changes in isomiR stoichiometry demonstrated high accuracy and precision as biomarkers for inflammation and COVID-19.
- A novel method for identifying isomiR biomarkers with built-in normalization was developed.
Conclusions:
- IsomiR stoichiometry variations represent a valuable, largely untapped resource for miRNA biomarker discovery.
- Analyzing isomiRs broadens the utility of miRNAs in non-invasive diagnostics.
- The proposed method offers a robust approach to identifying and normalizing isomiR biomarkers.
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