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Updated: Jan 22, 2026

Quantification and Size-profiling of Extracellular Vesicles Using Tunable Resistive Pulse Sensing
Published on: October 19, 2014
Extracellular Vesicles: Subcellular Organelles With the Potential to Spread Cancer Resistance
Fanny Ender1, Nikolas VON Bubnoff2, Frank Gieseler2
1Clinic for Hematology and Oncology, Experimental Oncology, University Medical Center Schleswig-Holstein (UKSH), University of Luebeck, Luebeck, Germany fanny.ender@uksh.de.
Abstract:
Although modern anticancer drugs have made great progress in disease treatment, the occurrence of drug resistance often leads to treatment failure. Understanding the molecular basis of resistance mechanisms is important to determine prognosis and develop strategies for circumvention. In this context, subcellular vesicles released by cancer cells have been identified to mediate cellular resistance by various mechanisms. Such extracellular vesicles (EVs) can be subdivided into exosomes and ectosomes based on their size, cargo, and mechanism of formation. The unveiling of EV-targeted treatment options depends on a sound knowledge on EV biology including biogenesis, release, targeting to recipient cells, and uptake. In this review, we focus on EVs as mediators of cancer drug resistance with a particular emphasis on the distinction of exosomes and ectosomes.
Insights
Cancer cells release extracellular vesicles (EVs), including exosomes and ectosomes, which mediate drug resistance. Understanding EV biology is crucial for developing new cancer treatment strategies.
Area of Science:
- Oncology
- Cell Biology
- Biochemistry
Background:
- Anticancer drug resistance is a major cause of treatment failure.
- Extracellular vesicles (EVs) released by cancer cells play a role in mediating drug resistance.
- EVs are classified as exosomes and ectosomes based on biogenesis and characteristics.
Purpose of the Study:
- To review the role of EVs in mediating cancer drug resistance.
- To highlight the distinctions between exosomes and ectosomes in resistance mechanisms.
- To emphasize the importance of EV biology for developing novel therapeutic strategies.
Main Methods:
- Literature review focusing on extracellular vesicle biology and cancer drug resistance.
- Analysis of studies differentiating exosome and ectosome functions.
- Synthesis of current knowledge on EV biogenesis, release, targeting, and uptake.
Main Results:
- Extracellular vesicles are key mediators of cancer drug resistance.
- Exosomes and ectosomes employ distinct mechanisms to confer resistance.
- Understanding EV pathways is essential for overcoming treatment failure.
Conclusions:
- Extracellular vesicles significantly contribute to cancer drug resistance.
- Targeting EV pathways presents a promising avenue for novel cancer therapies.
- Further research into exosome and ectosome biology is warranted to improve treatment outcomes.
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