Upregulation of long noncoding RNA Xist promotes proliferation of osteosarcoma by epigenetic silencing of P21
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Tianyang Xu1,*, Wenwei Jiang1,*, Lin Fan1, Qiuming Gao1 and Guodong Li1
1Department of Orthopedics, Shanghai Tenth People’s Hospital, Tong Ji University School of Medicine, Shanghai 200072, People’s Republic of China
*These authors have contributed equally to this work
Guodong Li, email: firstname.lastname@example.org
Keywords: osteosarcoma; Xist; proliferation; EZH2; P21
Received: April 25, 2017 Accepted: August 07, 2017 Published: September 08, 2017
Recent studies show that lncRNAs involve in the initiation and progression of various cancers including osteosarcoma (OS). IncRNA Xist has been verified as an oncogene in several human cancers, and its abnormal expression was closely associated with tumor initiation and progression. Nevertheless, the role of Xist in OS remains unclear. Here, we revealed the Xist expression level was up-regulated in OS tissues and discovered that Xist knockdown significantly repressed OS cell proliferation. Additionally, mechanistic analysis revealed that Xist can repress P21 expression to regulate OS cell cycle and proliferation by binding to EZH2. Taking all into account, Xist may function in promoting OS cell proliferation and may potentially serve as a novel biomarker and therapeutic target for OS.
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