IMR Press / FBL / Volume 25 / Issue 6 / DOI: 10.2741/4846

Frontiers in Bioscience-Landmark (FBL) is published by IMR Press from Volume 26 Issue 5 (2021). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on as a courtesy and upon agreement with Frontiers in Bioscience.

The role of exosomes in the promotion of epithelial-to-mesenchymal transition and metastasis
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1 Tumour Microenvironment Laboratory, QIMR Berghofer Medical Research Institute, Herston, QLD, Australia
2 School of Medicine, University of Queensland, Brisbane, QLD, Australia
Send correspondence to: Andreas Moller, Tumour Microenvironment Laboratory, QIMR Berghofer Medical Research Institute, Herston, QLD; School of Medicine, University of Queensland, Brisbane, QLD, Australia, Tel: 61738453950, E-mail:
Front. Biosci. (Landmark Ed) 2020, 25(6), 1022–1057;
Published: 1 March 2020
(This article belongs to the Special Issue Elucidation of exosomes role in metastasis)

The progression of a solid cancer from a localised disease to metastatic stages is a key reason for mortality in patients. Amongst the drivers of cancer progression, Epithelial-to-Mesenchymal Transition (EMT) has been shown to be of crucial importance. EMT results in the phenotypic shift of an immotile, treatment-sensitive epithelial cell into an elongated, metastatic and treatment-resistant mesenchymal cell. Depending on the cellular and molecular setting, a myriad of studies have demonstrated that EMT causes increased cancer cell motility, invasiveness, resistance to therapies, dormancy and cancer-stem cell phenotypes, all of which are prerequisites for metastasis. The alteration of non-canonical intercellular signalling events in cancer EMT is a phenomenon that is not completely understood. Recently, extracellular vesicles, especially small vesicles called exosomes, have shown to be involved in cancer cell EMT. Most intriguingly, across different cancer types, cancer-derived exosomes have demonstrated to be capable of transferring a mesenchymal phenotype upon recipient epithelial cells, including epithelial cancer cells. The uptake of EMT-inducing exosomes results in molecular changes, altering miRNA, mRNA, and protein levels, either through direct transfer of these components, or by altering gene expression networks involved in EMT. In this review, we are presenting the current state of research of exosomes in cancer EMT, highlight gaps in our current knowledge and propose strategies for future experiments in this area.

Extracellular vesicles
Epithelial-To-Mesenchymal Transition
Figure 1
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