NOV inhibits proliferation while promoting apoptosis and migration in osteosarcoma cell lines through p38/MAPK and JNK/MAPK pathways

  • Authors:
    • Juan Yao
    • Yaguang Weng
    • Shujuan Yan
    • Mengyi Hou
    • Hao Wang
    • Qiong Shi
    • Guowei Zuo
  • View Affiliations

  • Published online on: July 24, 2015     https://doi.org/10.3892/or.2015.4153
  • Pages: 2011-2021
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Abstract

The nephroblastoma overexpressed (NOV) gene, a member of the CCN gene family that encodes secreted proteins involved in a variety of processes including tumorigenesis, is often altered in a variety of tumors, including osteosarcoma. Recent studies indicated that NOV promotes osteosarcoma metastasis, but its biological functions and molecular mechanisms on osteosarcoma proliferation have yet to be fully elucidated. The aim of the present study was to examine the role of NOV in osteosarcoma biology. Reverse transcription-polymerase chain reaction (RT-PCR) and western blot analysis were performed to characterize the endogenous expression of NOV in osteosarcoma cell lines. Recombinant adenovirus expressing NOV/siNOV (AdNOV/AdsiNOV) was used to infect osteosarcoma cell lines with a relatively low/high endogenous NOV expression to determine the functional relevance of NOV expression to osteosarcoma cell growth and migration in vitro, respectively. As a result, osteosarcoma cell proliferation was significantly reduced by NOV upregulation, indicated by 3-(4,5-dimethylthiazol-2-yl)-2, 5-diphenyltrazolium bromide (MTT), colony forming assay and cell cycle analysis. Cell apoptosis was markedly induced, as indicated by Hoechst 33258 staining assay and flow cytometry (FCM) detection. Despite the antiproliferative effect, NOV-transfected osteosarcoma cells exhibited increased migration ability. The possible molecular mechanisms underlying the biological role of NOV were also investigated. The results demonstrated that NOV increased the phosphorylation of p38 and c-Jun N-terminal kinase (JNK) mitogen-actived protein kinases (MAPKs) in osteosarcoma cell lines. When the phosphorylation of p38 and JNK were inhibited by SB203580 (p38 inhibitor) or SP600125 (JNK inhibitor), respectively, the NOV-induced proliferation inhibition and cell apoptosis were reversed. In conclusion, the results revealed that NOV regulates the tumor growth of osteosarcoma cells through activation of the MAPK signaling pathway and promotes osteosarcoma cell migration in vitro.
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October-2015
Volume 34 Issue 4

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

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Spandidos Publications style
Yao J, Weng Y, Yan S, Hou M, Wang H, Shi Q and Zuo G: NOV inhibits proliferation while promoting apoptosis and migration in osteosarcoma cell lines through p38/MAPK and JNK/MAPK pathways. Oncol Rep 34: 2011-2021, 2015
APA
Yao, J., Weng, Y., Yan, S., Hou, M., Wang, H., Shi, Q., & Zuo, G. (2015). NOV inhibits proliferation while promoting apoptosis and migration in osteosarcoma cell lines through p38/MAPK and JNK/MAPK pathways. Oncology Reports, 34, 2011-2021. https://doi.org/10.3892/or.2015.4153
MLA
Yao, J., Weng, Y., Yan, S., Hou, M., Wang, H., Shi, Q., Zuo, G."NOV inhibits proliferation while promoting apoptosis and migration in osteosarcoma cell lines through p38/MAPK and JNK/MAPK pathways". Oncology Reports 34.4 (2015): 2011-2021.
Chicago
Yao, J., Weng, Y., Yan, S., Hou, M., Wang, H., Shi, Q., Zuo, G."NOV inhibits proliferation while promoting apoptosis and migration in osteosarcoma cell lines through p38/MAPK and JNK/MAPK pathways". Oncology Reports 34, no. 4 (2015): 2011-2021. https://doi.org/10.3892/or.2015.4153