4.7 Article

Overproduction of Cyclin D1 is dependent on activated mTORC1 signal in nasopharyngeal carcinoma: Implication for therapy

Journal

CANCER LETTERS
Volume 279, Issue 1, Pages 47-56

Publisher

ELSEVIER IRELAND LTD
DOI: 10.1016/j.canlet.2009.01.020

Keywords

mTORC1; Cyclin D1; Apoptosis; Therapy; Nasopharyngeal carcinoma

Categories

Funding

  1. National Natural Science Fund of China [30572025, 30700935, 30872845]

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Activated mTOR was implicated to play a role in the carcinogenesis of nasopharyngeal carcinoma (NPC). However, the mechanism of activated mTOR/Complex1 (mTORC1) signaling pathway in NPC development has not been well established. In this study, we correlated the expression of mTORC1 signal molecules and Cyclin D1 in NPC. We also investigated the effect of blocking mTORC1 signal with rapamycin and mTOR siRNA on Cyclin D1 expression in CNE-2 cells, as well as cell apoptosis and viability. We found a positive association of mTORC1 signal molecules and Cyclin D1 in NPC. Also, we found blockage mTORC1 inhibited Cyclin D1 expression in CNE-2 cells and enhanced cell apoptosis. Our results suggested that mTORC1 signal pathway might be a potential target for NPC therapy. (C) 2009 Elsevier Ireland Ltd. All rights reserved.

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