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Proteomic analysis of a nasopharyngeal carcinoma cell line and a nasopharyngeal epithelial cell line

Abstract

Background

Nasopharyngeal carcinoma (NPC) is an epithelial malignancy exhibiting a strong geographic preference and a close association with Epstein-Barr virus (EBV). The aim of this study was to investigate the precise mechanism of nasopharyngeal epithelial-to-NPC tumorigenesis and to identify possible biomarkers and targets for therapy.

Methods

Proteomic analysis was performed on the immortalized nasopharyngeal epithelial cell line NP69 and the NPC cell line C666.

Results

A comparative analysis of total lysates from the cell lines using 2-D gel electrophoresis–mass spectrometry resulted in the identification of 87 different protein spots. The different proteins were grouped into 5 main categories: (i) energy production and general metabolism, (ii) adaptation/stress tolerance, (iii) cell proliferation, (iv) cell structure and (v) epithelial-mesenchymal transition. The detection of metabolism-related proteins indicated that the NPC cells relied on aerobic glycolysis, with reduced use of the citric acid cycle. Glucose uptake and lactate secretion increased in the medium of C666 compared with NP69.

Conclusions

The present study revealed that glycolysis was up-regulated in the NPC cell lines compared with nasopharyngeal epithelial cells. A number of molecules involved in metabolism were identified, and further investigations will be needed to validate these potential biomarkers or targets.

Tumori 2015; 101(6): 676 - 683

Article Type: ORIGINAL RESEARCH ARTICLE

DOI:10.5301/tj.5000345

Authors

Pei-Yu Huang, Ting-Ting Zeng, Meng-Qing Li, Xiaojiao Ban, Ying-Hui Zhu, Bao-Zhu Zhang, Hai-Qiang Mai, Li Zhang, Xin-Yuan Guan, Yan Li

Article History

Disclosures

Financial support: This study was supported by the National Natural Science Foundation of China (81172338, 81272416, 81472250 and 81472255), the Sun Yat-Sen University “Hundred Talents Program” (85000-3171311) and Young Talent Teachers Plan (11ykpy58 and 13ykzd26) and the Guangdong Department of Education Science and Technology Innovation Project (2013KJCX0001).
Conflict of interest: The authors declare that there are no conflicts of interest.

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Authors

Affiliations

  • State Key Laboratory of Oncology in South China, Sun Yat-sen University Cancer Center, Collaborative Innovation Center of Cancer Medicine, Guangzhou - PR China
  • Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou - PR China
  • Department of Medical Oncology, Sun Yat-sen University Cancer Center, Guangzhou - PR China
  • Department of Clinical Oncology, The University of Hong Kong, Hong Kong - PR China

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