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Updated: Mar 16, 2026

MicroRNA Amplification and Recognition through Locked-nucleic-acid In situ Hybridization as a Novel Detection and Quantification Method
Published on: October 7, 2025
microRNAs as cancer biomarkers
Kjersti Flatmark1,2,3, Eirik Høye2, Bastian Fromm2
1a Department of Gastroenterological Surgery , Norwegian Radium Hospital, Oslo University Hospital , Oslo , Norway ;
Abstract:
Since their discovery in 1993, microRNAs (miRNAs) have been identified as important gene regulators in many biological processes and as key molecular players in human disease, including cancer where they show specific pathogenic deregulation. Their remarkable chemical stability, the availability of very sensitive miRNA detection methods and the fact that miRNAs can be extracted from and detected in various kinds of clinically relevant samples, such as solid tissues, body fluids and secretions make them excellent candidate biomarkers. However, no miRNA has yet entered the level of practical clinical relevance. We present a brief background and some key aspects and challenges of miRNAs as cancer biomarkers, we discuss shortfalls and identify possible routes towards the use of miRNAs as reliable biomarkers for cancer.
Insights
MicroRNAs (miRNAs) are crucial gene regulators and cancer players. Despite their potential as cancer biomarkers due to stability and detectability, challenges remain for clinical application.
Area of Science:
- Molecular Biology
- Oncology
- Biomarker Discovery
Background:
- MicroRNAs (miRNAs) are key gene regulators discovered in 1993.
- miRNAs are implicated in biological processes and human diseases, notably cancer.
- Specific deregulation of miRNAs is observed in pathogenic cancer development.
Purpose of the Study:
- To review the potential of miRNAs as cancer biomarkers.
- To discuss the challenges hindering the clinical use of miRNAs in cancer diagnostics.
- To identify pathways for establishing miRNAs as reliable cancer biomarkers.
Main Methods:
- Literature review of miRNA research in cancer.
- Analysis of miRNA properties relevant to biomarker applications.
- Discussion of current limitations and future directions.
Main Results:
- miRNAs exhibit chemical stability and sensitive detection methods.
- miRNAs can be extracted from various clinical samples (tissues, fluids).
- No miRNA has yet achieved practical clinical relevance as a cancer biomarker.
Conclusions:
- miRNAs possess desirable characteristics for cancer biomarker development.
- Overcoming current shortfalls is essential for clinical translation.
- Further research is needed to establish miRNAs as reliable cancer biomarkers.
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