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Published in: Breast Cancer Research and Treatment 3/2018

Open Access 01-12-2018 | Brief Report

Extracellular vesicles from triple-negative breast cancer cells promote proliferation and drug resistance in non-tumorigenic breast cells

Authors: Patricia Midori Murobushi Ozawa, Faris Alkhilaiwi, Iglenir João Cavalli, Danielle Malheiros, Enilze Maria de Souza Fonseca Ribeiro, Luciane Regina Cavalli

Published in: Breast Cancer Research and Treatment | Issue 3/2018

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Abstract

Purpose

Triple-negative breast cancer (TNBC), an aggressive breast cancer subtype, is genetically heterogeneous which challenges the identification of clinically effective molecular makers. Extracellular vesicles (EVs) are key players in the intercellular signaling communication and have been shown to be involved in tumorigenesis. The main goal of this study was to evaluate the role and mechanisms of EVs derived from TNBC cells in modulating proliferation and cytotoxicity to chemotherapeutic agents in non-tumorigenic breast cells (MCF10A).

Methods

EVs were isolated from TNBC cell lines and characterized by nanoparticle tracking analysis, Western blot, and transmission electron microscopy. MCF10A cells were treated with the isolated EVs and evaluated for cell proliferation and cytotoxicity to Docetaxel and Doxorubicin by the MTT and MTS assays, respectively. Gene and miRNA expression profiling was performed in the treated cells to determine expression changes that may be caused by EVs treatment.

Results

MCF10A cells treated with HCC1806-EVs (MCF10A/HCC1806-EVs) showed a significant increase in cell proliferation and resistance to the therapeutic agents tested. No significant effects were observed in the MCF10A cells treated with EVs derived from MDA-MB-231 cells. Gene and miRNA expression profiling revealed 138 genes and 70 miRNAs significantly differentially expressed among the MCF10A/HCC1806-EVs and the untreated MCF10A cells, affecting mostly the PI3K/AKT, MAPK, and HIF1A pathways.

Conclusion

EVs isolated from the HCC1806 TNBC cells are capable of inducing proliferation and drug resistance on the non-tumorigenic MCF10A breast cells, potentially mediated by changes in genes and miRNAs expression associated with cell proliferation, apoptosis, invasion, and migration.
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Metadata
Title
Extracellular vesicles from triple-negative breast cancer cells promote proliferation and drug resistance in non-tumorigenic breast cells
Authors
Patricia Midori Murobushi Ozawa
Faris Alkhilaiwi
Iglenir João Cavalli
Danielle Malheiros
Enilze Maria de Souza Fonseca Ribeiro
Luciane Regina Cavalli
Publication date
01-12-2018
Publisher
Springer US
Published in
Breast Cancer Research and Treatment / Issue 3/2018
Print ISSN: 0167-6806
Electronic ISSN: 1573-7217
DOI
https://doi.org/10.1007/s10549-018-4925-5

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