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Updated: Feb 18, 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 and miRceptors: a new mechanism of action for intercellular communication
Muller Fabbri1,2,3
1Department of Pediatrics, Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA mfabbri@chla.usc.edu.
Abstract:
MicroRNAs (miRs) are small non-coding RNAs (ncRNAs) that control the expression of target genes by modulating (usually inhibiting) their translation into proteins. This 'traditional' mechanism of action of miRs has been recently challenged by new discoveries pointing towards a role of miRs as 'hormones', capable of binding to proteic receptors (miRceptors) and triggering their downstream signalling pathways. These findings harbour particular significance within the tumour microenvironment (TME), defined as the variety of non-cancerous cells surrounding cancer cells, but are relevant also for other diseases. In recent years it has become clearer that the TME does not passively assist the growth of cancer cells but contributes to its biology. Some of the mediators of the intercellular communication between cancer cells and TME are miRs shuttled within exosomes, a subtype of cellular released extracellular vesicles. This article will highlight the most recent findings on the biological implications of miR-miRceptor interactions for the biology of the TME and other diseases, and will provide some perspectives on the future development of this fascinating research.This article is part of the discussion meeting issue 'Extracellular vesicles and the tumour microenvironment'.
Insights
MicroRNAs (miRs) act as hormones, binding to receptors to influence cell signaling. This novel mechanism is crucial for understanding the tumor microenvironment and other diseases.
Area of Science:
- Molecular Biology
- Cell Biology
- Cancer Research
Background:
- MicroRNAs (miRs) are small non-coding RNAs regulating gene expression.
- Traditionally, miRs inhibit protein translation.
- Emerging evidence suggests miRs function as signaling molecules.
Purpose of the Study:
- Investigate the non-canonical 'hormone-like' function of miRs.
- Explore the role of miR-miRceptor interactions in the tumor microenvironment (TME).
- Discuss implications for other diseases and future research directions.
Main Methods:
- Review of recent scientific literature on miR function.
- Analysis of studies on miR-miRceptor interactions.
- Examination of miR roles in intercellular communication via exosomes.
Main Results:
- miRs can bind to specific proteic receptors (miRceptors).
- This binding triggers downstream signaling pathways.
- Exosome-shuttled miRs mediate intercellular communication within the TME.
Conclusions:
- miR-miRceptor interactions represent a significant paradigm shift in understanding miR biology.
- This mechanism is vital for TME function and disease pathogenesis.
- Further research into miR-miRceptor signaling holds therapeutic potential.
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