Analysis of the differential secretome of nasopharyngeal carcinoma cell lines CNE-2R and CNE-2

  • Authors:
    • Ze-Tan Chen
    • Ling Li
    • Ya Guo
    • Song Qu
    • Wei Zhao
    • Hao Chen
    • Fang Su
    • Jun Yin
    • Qi-Yan Mo
    • Xiao-Dong Zhu
  • View Affiliations

  • Published online on: September 8, 2015     https://doi.org/10.3892/or.2015.4255
  • Pages: 2477-2488
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Abstract

Radioresistance is the major cause of poor prognosis in nasopharyngeal carcinoma (NPC). To identify and characterize the secretome associated with NPC radioresistance, we compared the conditioned serum-free medium of radioresistant CNE-2R cells with that of the parental radiosensitive CNE-2 cells using isobaric tags for relative and absolute quantitation (iTRAQ) with liquid chromatography-electrospray tandem mass spectrometry (LC-ESI-MS/MS) quantitative proteomics. Before proceeding to quantitative proteomics, we investigated the survival curves of CNE-2R and CNE-2 cells by colony formation assay, and the CNE-2R survival curves were significantly higher than those for CNE-2. In total, 3,581 proteins were identified in the quantitative proteomics experiments, and 40 proteins exhibited significant differences between the CNE-2R and CNE-2 cells. Twenty-six of the 40 proteins were secreted by classical, non-classical, or exosomal secretion pathways. To verify the reliability of iTRAQ quantitative proteomics, we applied western blotting (WB) to study the secretory protein expression of fibrillin-2, CD166, sulfhydryl oxidase 1 and cofilin-2, which are involved in cell adhesion, migration and invasion. The WB results showed that fibrillin-2 (p=0.017) and sulfhydryl oxidase 1 (p=0.000) were highly expressed in the CNE-2 cells, while CD166 (p=0.012) and cofilin-2 (p=0.003) were highly expressed in the CNE-2R cells, which was in accordance with iTRAQ quantitative proteomics. Finally, a phenotypic subset of CD166-positive NPC cells was verified by immunocytochemistry. In summary, we defined a collection of secretory proteins that may be relevant to the radioresistance in NPC cells, and we determined that CD166, which is widely used as a positive marker of cancer stem cells, is expressed in NPC cells.
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November-2015
Volume 34 Issue 5

Print ISSN: 1021-335X
Online ISSN:1791-2431

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Spandidos Publications style
Chen Z, Li L, Guo Y, Qu S, Zhao W, Chen H, Su F, Yin J, Mo Q, Zhu X, Zhu X, et al: Analysis of the differential secretome of nasopharyngeal carcinoma cell lines CNE-2R and CNE-2. Oncol Rep 34: 2477-2488, 2015
APA
Chen, Z., Li, L., Guo, Y., Qu, S., Zhao, W., Chen, H. ... Zhu, X. (2015). Analysis of the differential secretome of nasopharyngeal carcinoma cell lines CNE-2R and CNE-2. Oncology Reports, 34, 2477-2488. https://doi.org/10.3892/or.2015.4255
MLA
Chen, Z., Li, L., Guo, Y., Qu, S., Zhao, W., Chen, H., Su, F., Yin, J., Mo, Q., Zhu, X."Analysis of the differential secretome of nasopharyngeal carcinoma cell lines CNE-2R and CNE-2". Oncology Reports 34.5 (2015): 2477-2488.
Chicago
Chen, Z., Li, L., Guo, Y., Qu, S., Zhao, W., Chen, H., Su, F., Yin, J., Mo, Q., Zhu, X."Analysis of the differential secretome of nasopharyngeal carcinoma cell lines CNE-2R and CNE-2". Oncology Reports 34, no. 5 (2015): 2477-2488. https://doi.org/10.3892/or.2015.4255