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Updated: May 15, 2026

Analysis of the Gap Junction-dependent Transfer of miRNA with 3D-FRAP Microscopy
Published on: June 19, 2017
Intercellular transport of microRNAs
Reinier A Boon1, Kasey C Vickers
1Institute for Cardiovascular Regeneration, J.W. Goethe University Hospital, Frankfurt am Main, Germany.
Abstract:
Extracellular microRNAs (miRNA) are present in most biological fluids, relatively stable, and hold great potential for disease biomarkers and novel therapeutics. Circulating miRNAs are transported by membrane-derived vesicles (exosomes and microparticles), lipoproteins, and other ribonucleoprotein complexes. Evidence suggests that miRNAs are selectively exported from cells with distinct signatures that have been found to be altered in many pathophysiologies, including cardiovascular disease. Protected from plasma ribonucleases by their carriers, functional miRNAs are delivered to recipient cells by various routes. Transferred miRNAs use cellular machinery to reduce target gene expression and alter cellular phenotype. Similar to soluble factors, miRNAs mediate cell-to-cell communication linking disparate cell types, diverse biological mechanisms, and homeostatic pathways. Although significant advances have been made, miRNA intercellular communication is full of complexities and many questions remain. This review brings into focus what is currently known and outstanding in a novel field of study with applicability to cardiovascular disease.
Insights
Extracellular microRNAs (miRNAs) are stable molecules in body fluids, acting as biomarkers and therapeutics. This review explores their role in cell communication and cardiovascular disease.
Area of Science:
- Molecular Biology
- Biochemistry
- Genetics
Background:
- Extracellular microRNAs (miRNAs) are found in biological fluids and are stable.
- They are transported via vesicles, lipoproteins, and ribonucleoprotein complexes.
- Altered miRNA signatures are observed in pathophysiologies like cardiovascular disease.
Purpose of the Study:
- To review current knowledge on extracellular miRNA intercellular communication.
- To highlight outstanding questions in the field.
- To discuss the applicability of miRNA research to cardiovascular disease.
Main Methods:
- Literature review of studies on extracellular miRNAs.
- Analysis of miRNA transport mechanisms and cellular uptake.
- Examination of miRNA's role in cell-to-cell communication.
Main Results:
- Extracellular miRNAs are selectively exported and delivered to recipient cells.
- Transferred miRNAs can alter target gene expression and cellular phenotype.
- miRNAs mediate cell-to-cell communication, impacting various biological pathways.
Conclusions:
- Extracellular miRNAs are crucial mediators of intercellular communication.
- Their dysregulation is linked to cardiovascular disease.
- Further research is needed to fully understand their complexities and therapeutic potential.
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