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Down-Regulation of Ribosomal Protein RPS21 Inhibits Invasive Behavior of Osteosarcoma Cells Through the Inactivation of MAPK Pathway

Authors Wang T, Wang ZY, Zeng LY, Gao YZ, Yan YX, Zhang Q

Received 22 January 2020

Accepted for publication 27 May 2020

Published 25 June 2020 Volume 2020:12 Pages 4949—4955

DOI https://doi.org/10.2147/CMAR.S246928

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Editor who approved publication: Dr Antonella D'Anneo


Tao Wang,* Zhi-Yong Wang,* Ling-Yuan Zeng, Yao-Zu Gao, Yu-Xin Yan, Quan Zhang

Department of Orthopedics, The Second Hospital of Shanxi Medical University, Taiyuan City, Shanxi Province 030001, People’s Republic of China

*These authors contributed equally to this work

Correspondence: Tao Wang Tel +86-0351-3363078
Email shanxiwangtao0912@163.com

Objective: The goal of our present study was to explore the expression level, biological function, and underlying molecular mechanism of ribosomal protein s21 (RPS21) in human osteosarcoma (OS).
Methods: Firstly, we evaluated the expression of RPS21 in OS tissue samples based on the Gene Expression Omnibus (GEO) datasets and also measured the RPS21 expression of OS cell lines (MG63, and U2OS) by quantitative real-time polymerase chain reaction (qRT-PCR). siRNA interference method was used to reduce the expression of RSP21 in the OS cells. Cell Counting Kit-8 (CCK-8), colony formation, wound-healing, and transwell assays were conducted to measure the proliferation, migration, and invasion of OS cells. The mitogen-activated protein kinase (MAPK) pathway-related proteins levels were examined by Western blot.
Results: Our analyses showed that the expression of RPS21 was significantly increased in OS, compared with normal samples. Upregulation of RPS21 was associated with worse outcomes of OS patients. Knockdown of RPS21 suppressed OS cell proliferation, colony-forming ability, migration, and invasion capacities. Moreover, down-regulation of RPS21 inactivated the MAPK signaling pathway.
Conclusion: RPS21 plays an oncogenic candidate in OS development via regulating the activity of MAPK pathway; therefore, it may serve as a novel therapeutic target for OS treatment.

Keywords: RPS21, MAPK pathway, osteosarcoma, viability, migration

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