WISP-1 overexpression upregulates cell proliferation in human salivary gland carcinomas via regulating MMP-2 expression
Authors Li FJ, Wang XJ, Zhou XL
Received 25 February 2016
Accepted for publication 28 April 2016
Published 21 October 2016 Volume 2016:9 Pages 6539—6548
Checked for plagiarism Yes
Review by Single-blind
Peer reviewers approved by Dr Ru Chen
Peer reviewer comments 2
Editor who approved publication: Dr William Cho
Fu-Jun Li, Xin-Juan Wang, Xiao-Li Zhou
Department of Stomatology, The First Affiliated Hospital of Henan University of Science and Technology, Luoyang, People’s Republic of China
Background: WISP-1 is a member of the CCN family of growth factors and has been reported to play an important role in tumorigenesis by triggering downstream events via integrin signaling. However, little is known about the role of WISP-1 in proliferation of salivary gland carcinoma (SGC) cells.
Methods: In this study, we investigated the WISP-1 expression in SGC tissues via immunohistochemical staining, Western blotting assay, and real-time quantitative polymerase chain reaction method, and then evaluated the regulatory role of WISP-1 in the growth of SGC A-253 cells. In addition, the role of MMP-2 in the WISP-1-mediated growth regulation was also investigated.
Results: It was demonstrated that the WISP-1 expression was upregulated at both mRNA and protein levels in 15 of 21 SGC tumor tissues, compared to the non-tumor tissues (five of 21), associated with the lymph node dissection and bone invasion. The in vitro CCK-8 assay and colony-forming assay demonstrated that the exogenous WISP-1 treatment or the WISP-1 overexpression promoted the growth of A-253 cells. In addition, we confirmed that the WISP-1 overexpression upregulated the MMP-2 expression in A-253 cells with the gain-of-function and loss-of-function strategies, and that the MMP-2 knockdown attenuated the WISP-1-mediated growth promotion of A-253 cells.
Conclusion: We found that WISP-1 was overexpressed in the human SGCs, and the WISP-1 overexpression promoted the salivary gland cell proliferation via upregulating MMP-2 expression. Our study recognized the oncogenic role of WISP-1 in human SGCs, which could serve as a potential target for anticancer therapy.
Keywords: WISP-1, SGCs, proliferation, MMP-2
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