Abstract |
Acquired drug resistance is a major obstacle to chemotherapy of cancers. In this study, we aim to investigate the role of exosomes in drug-resistance transfer between breast cancer cells and detect the probable mechanism. A docetaxel-resistant variant of MCF-7 cell line (MCF-7/DOC) was established and then compared with the drug-sensitive variant (MCF-7/S). Exosomes were expelled from the cell supernatant using ultracentrifugation. Drug resistance was assessed by apoptosis assay and MTT examination. Expressions of P-glycoprotein (P-gp) were analyzed by flow cytometry. Stained exosomes were absorbed by receipt cells. MCF-7/S in the presence of exosomes extracted from the supernatant of MCF-7/DOC (DOC/exo) acquired drug resistance, while MCF-7/S exposed to their own exosomes (S/exo) did not. P-gp expression patterns of exosomes were similar as the originated cells. P-gp expression of MCF-7/S increased after incubation with DOC/exo and was affected by the amount of exosomes. Exosomes are effective in transferring drug resistance as well as P-gp from drug-resistant breast cancer cells to sensitive ones. The delivery of P-gp via exosomes may be a mechanism of exosome-mediated drug resistance transfer.
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Authors | Meng-meng Lv, Xing-ya Zhu, Wei-xian Chen, Shan-liang Zhong, Qing Hu, Teng-fei Ma, Jun Zhang, Lin Chen, Jin-hai Tang, Jian-hua Zhao |
Journal | Tumour biology : the journal of the International Society for Oncodevelopmental Biology and Medicine
(Tumour Biol)
Vol. 35
Issue 11
Pg. 10773-9
(Nov 2014)
ISSN: 1423-0380 [Electronic] Netherlands |
PMID | 25077924
(Publication Type: Journal Article)
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Chemical References |
- ATP Binding Cassette Transporter, Subfamily B, Member 1
- Taxoids
- Docetaxel
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Topics |
- ATP Binding Cassette Transporter, Subfamily B, Member 1
(metabolism)
- Apoptosis
(drug effects)
- Blotting, Western
- Breast Neoplasms
(drug therapy, metabolism, pathology)
- Cell Proliferation
(drug effects)
- Docetaxel
- Drug Resistance, Multiple
- Drug Resistance, Neoplasm
- Exosomes
- Female
- Flow Cytometry
- Humans
- Taxoids
(pharmacology)
- Tumor Cells, Cultured
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