Journal
PROTEOMICS
Volume 13, Issue 14, Pages 2125-2134Publisher
WILEY
DOI: 10.1002/pmic.201200323
Keywords
Cell biology; Exosome; Microvesicle; Nonsmall cell lung cancer; Pleural effusion
Funding
- Proteogenomic Research Program through the National Research Foundation of Korea
- Bio and Medical Technology Development Program through the National Research Foundation of Korea [2012M3A9B6055305]
- Korean Ministry of Education, Science and Technology
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Microvesicles (MVs, also known as exosomes, ectosomes, microparticles) are released by various cancer cells, including lung, colorectal, and prostate carcinoma cells. MVs released from tumor cells and other sources accumulate in the circulation and in pleural effusion. Although recent studies have shown that MVs play multiple roles in tumor progression, the potential pathological roles of MV in pleural effusion, and their protein composition, are still unknown. In this study, we report the first global proteomic analysis of highly purified MVs derived from human nonsmall cell lung cancer (NSCLC) pleural effusion. Using nano-LC-MS/MS following 1D SDS-PAGE separation, we identified a total of 912 MV proteins with high confidence. Three independent experiments on three patients showed that MV proteins from PE were distinct from MV obtained from other malignancies. Bioinformatics analyses of the MS data identified pathologically relevant proteins and potential diagnostic makers for NSCLC, including lung-enriched surface antigens and proteins related to epidermal growth factor receptor signaling. These findings provide new insight into the diverse functions of MVs in cancer progression and will aid in the development of novel diagnostic tools for NSCLC.
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