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Updated: Jun 9, 2026
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MicroRNA Amplification and Recognition through Locked-nucleic-acid In situ Hybridization as a Novel Detection and Quantification Method
Published on: October 7, 2025
MicroRNA detection in bone marrow cells by LNA-FISH
Silvana Debernardi1, Amanda Dixon-McIver
1Medical Oncology Centre, Barts & The London School of Medicine and Dentistry, Institute of Cancer, Queen Mary University of London, London, UK.
Methods in Molecular Biology (Clifton, N.J.)
|September 10, 2010
Summary
This study details a method for detecting microRNAs (miRNAs) in leukemia cells using Locked Nucleic Acid-fluorescence in situ hybridization (LNA-FISH). The technique precisely locates specific miRNAs, confirming their expression in acute myeloid leukemia (AML).
Area of Science:
- Molecular Biology
- Genetics
- Cell Biology
Background:
- MicroRNAs (miRNAs) play crucial roles in cellular processes, and their dysregulation is implicated in various diseases, including leukemia.
- Accurate detection and spatial localization of miRNAs are essential for understanding their function and role in disease pathogenesis.
- Existing methods may lack the specificity and resolution required to distinguish between closely related miRNA family members.
Purpose of the Study:
- To describe a robust protocol for the detection and spatial localization of miRNAs in primary leukaemic suspension cells.
- To demonstrate the utility of Locked Nucleic Acid (LNA)-modified probes combined with fluorescence in situ hybridization (FISH) for high-specificity miRNA detection.
- To validate the expression and spatial distribution of specific miRNAs (miR-127 and miR-154) in acute myeloid leukemia (AML) cells.
Main Methods:
- Utilized digoxigenin (DIG)-labeled, LNA-modified probes for enhanced miRNA binding affinity and specificity.
- Employed fluorescence in situ hybridization (FISH) for direct visualization of miRNA targets within cells.
- Detected DIG-labeled probes using an anti-DIG fluorescein isothiocyanate (FITC) conjugated antibody.
- Visualized fluorescent signals using confocal microscopy for precise spatial localization.
- Confirmed miRNA expression using real-time PCR.
Main Results:
- LNA probe hybridization demonstrated high accuracy, enabling discrimination between single nucleotide differences in miRNAs.
- Successfully visualized the spatial localization of mature miR-127 and miR-154 in primary AML suspension cells.
- Confirmed the expression of these miRNAs in a specific subtype of leukemia.
Conclusions:
- The LNA-FISH protocol provides a sensitive and specific method for miRNA detection and spatial localization in challenging sample types like primary leukemia cells.
- This technique allows for the precise mapping of miRNA expression within specific cell populations, aiding in the understanding of their functional roles in leukemia.
- The findings confirm the presence of miR-127 and miR-154 in AML, contributing to the molecular characterization of this disease subtype.
