Chemoresistance Transmission via Exosome-Mediated EphA2 Transfer in Pancreatic Cancer
| Autor: | Ye Tony Hu, Qian Wei, Yang Liu, Paul W. Bernard, Haiyong Han, Jia Fan, Zhen Zhao, Bo Ning, Eugene J. Koay, Matthew H.G. Katz, Ning Zhang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Cell type Proteome endocrine system diseases Cell Survival Cell Medicine (miscellaneous) Antineoplastic Agents EphA2 Exosomes Cytotoxic resistance Deoxycytidine Exosome Small hairpin RNA 03 medical and health sciences 0302 clinical medicine Cell Line Tumor Pancreatic cancer medicine Humans Pharmacology Toxicology and Pharmaceutics (miscellaneous) Chemistry Receptor EphA2 medicine.disease EPH receptor A2 Gemcitabine digestive system diseases Microvesicles 3. Good health Pancreatic Neoplasms 030104 developmental biology medicine.anatomical_structure Drug Resistance Neoplasm Cell culture 030220 oncology & carcinogenesis Cancer research Research Paper |
| Zdroj: | Theranostics |
| ISSN: | 1838-7640 |
| DOI: | 10.7150/thno.26650 |
| Popis: | Rationale: Exosomes are small extracellular vesicles secreted by most cells that are found in blood and other bodily fluids, and which contain cytoplasmic material and membrane factors corresponding to their cell type of origin. Exosome membrane factors and contents have been reported to alter adjacent and distant cell behavior in multiple studies, but the impact of cancer-derived exosomes on chemoresistance is less clear. Methods: Exosomes isolated from three pancreatic cancer (PC) cell lines displaying variable gemcitabine (GEM) resistance (PANC-1, MIA PaCa-2, and BxPC-3) were tested for their capacity to transmit chemoresistance among these cell lines. Comparative proteomics was performed to identify key exosomal proteins that conferred chemoresistance. Cell survival was assessed in GEM responsive PC cell lines treated with recombinant Ephrin type-A receptor 2 (EphA2), a candidate chemoresistance transfer factor, or exosomes from a chemoresistant PC cell line treated with or without EphA2 shRNA. Results: Exosomes from chemoresistant PANC-1 cells increased the GEM resistance of MIA PaCa-2 and BxPC-3 cell cultures. Comparative proteomics determined that PANC-1 exosomes overexpressed Ephrin type-A receptor 2 (EphA2) versus exosomes of less chemoresistant PC cell lines MIA PaCa-2 and BxPC-3. EphA2-knockdown in PANC-1 cells inhibited their ability to transmit exosome-mediated chemoresistance to MIA PaCa-2 and BxPC-3, while treatment of MIA PaCa-2 and BxPC-3 cells with soluble EphA2 did not promote chemoresistance, indicating that membrane carried EphA2 was important for the EphA2 chemoresistance effect. Conclusion: Exosomal EphA2 expression could transmit chemoresistance and may potentially serve as a minimally-invasive predictive biomarker for PC treatment response. Further work should address whether additional exosomal factors regulate resistance to other cancer therapeutic agents for PC or other cancer types. |
| Databáze: | OpenAIRE |
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