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Updated: Apr 11, 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: short non-coding players in cancer chemoresistance
Sara Donzelli1, Federica Mori2, Francesca Biagioni1
1Translational Oncogenomics Unit, Italian National Cancer Institute 'Regina Elena', Via Elio Chianesi 53, 00144 Rome, Italy.
Abstract:
Chemoresistance is one of the main problems in the therapy of cancer. There are a number of different molecular mechanisms through which a cancer cell acquires resistance to a specific treatment, such as alterations in drug uptake, drug metabolism and drug targets. There are several lines of evidence showing that miRNAs are involved in drug sensitivity of cancer cells in different tumor types and by different treatments. In this review, we provide an overview of the more recent and significant findings on the role of miRNAs in cancer cell drug resistance. In particular, we focus on specific miRNA mechanisms of action that in various steps lead from drug cell sensitivity to drug cell resistance. We also provide evidence on how miRNA profiling may unveil relevant predictive biomarkers for therapy outcomes.
Insights
MicroRNAs (miRNAs) play a crucial role in cancer chemoresistance by influencing drug sensitivity. Understanding miRNA mechanisms can lead to predictive biomarkers for cancer therapy outcomes.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Chemoresistance is a major challenge in cancer therapy.
- Cancer cells develop resistance through mechanisms like altered drug metabolism and targets.
- MicroRNAs (miRNAs) are increasingly recognized for their role in modulating cancer drug sensitivity.
Purpose of the Study:
- To review recent findings on the role of miRNAs in cancer chemoresistance.
- To elucidate specific miRNA mechanisms contributing to drug resistance.
- To explore the potential of miRNA profiling as predictive biomarkers.
Main Methods:
- Literature review of recent studies on miRNAs and chemoresistance.
- Analysis of molecular mechanisms underlying miRNA-mediated drug resistance.
- Evaluation of evidence for miRNA profiling in predicting therapy outcomes.
Main Results:
- miRNAs significantly influence cancer cell sensitivity and resistance to various treatments.
- Specific miRNAs can promote or inhibit chemoresistance through diverse molecular pathways.
- miRNA expression profiles show promise as predictive biomarkers for patient response to therapy.
Conclusions:
- miRNAs are key regulators of cancer chemoresistance.
- Targeting miRNA pathways may offer novel therapeutic strategies.
- miRNA profiling holds potential for personalized cancer treatment decisions.
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