Serum Derived Exosomes From Pancreatic Cancer Patients Promoted Metastasis: An iTRAQ-Based Proteomic Analysis
Authors Tang P, Tao L, Yuan C, Zhang L, Xiu D
Received 1 September 2019
Accepted for publication 17 October 2019
Published 6 November 2019 Volume 2019:12 Pages 9329—9339
Checked for plagiarism Yes
Review by Single-blind
Peer reviewer comments 2
Editor who approved publication: Dr Federico Perche
Puxian Tang,1,2,* Lianyuan Tao,1,3,* Chunhui Yuan,1 Lingfu Zhang,1 Dianrong Xiu1
1Department of General Surgery, Peking University Third Hospital, Beijing 100191, People’s Republic of China; 2Department of Intensive Care Unit, Beijing Hospital, Beijing 100730, People’s Republic of China; 3Department of Hepatobiliary Surgery, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, School of Clinical Medicine, Henan University, Zhengzhou, Henan 450003, People’s Republic of China
*These authors contributed equally to this work
Correspondence: Dianrong Xiu
Department of General Surgery, Peking University Third Hospital, No. 49, Hua Yuan North Road, Hai Dian District, Beijing 100191, People’s Republic of China
Background: Pancreatic cancer (PC) is one of the most aggressive malignancies and has a poor prognosis despite being extensively researched. The role of serum-derived exosomes in tumorigenesis and the development of PC is still unclear.
Method: The present study employed iTRAQ-based proteomic analysis to search for differences between the serum exosomes of PC patients and those from control patients. Then, bioinformatics methods were used to analyze the functions of the identified proteins, and the possible functions were verified through cell culture experiments.
Results: A total of 611 proteins were identified from exosomes, and 141 proteins were differentially expressed, with 91 up- and 50 down regulated proteins in PC cancer compared to healthy controls. Further analysis indicated that APOE serves as an important hub in the network. In addition, CRP, VWF, APOA2, NIN, and GSK3B potentially interact with many other proteins. We then tested the effect of patient serum-derived exosomes on pancreatic cancer cells and found that patient serum-derived exosomes, but not those from healthy controls, induced cell proliferation, migration, and EMT, supporting the role of exosomes in metastasis.
Conclusion: Our data suggest that exosomes derived from PC patients may promote PC metastasis.
Keywords: proteomic analysis, pancreatic cancer, serum exosome, metastasis
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