Yining Xu,1,2,* Teng Yao,2,* Kangmao Huang,2,* Gang Liu,2 Yizhen Huang,2 Jun Gao,2 Huali Ye,2 Shuying Shen,2 Jianjun Ma1,2 1Shaoxing University School of Medicine, Shaoxing, Zhejiang 312000, People’s Republic of China; 2Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province, Hangzhou, Zhejiang, People’s Republic of China*These authors contributed equally to this workCorrespondence: Shuying ShenDepartment of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province, Hangzhou, Zhejiang 310000, People’s Republic of ChinaTel +0086-057186002200Fax +0086-057186044817Email email@example.comJianjun MaShaoxing University School of Medicine, Shaoxing, Zhejiang 312000, People’s Republic of ChinaEmail firstname.lastname@example.orgPurpose: Prevailing evidences have demonstrated that circular RNAs (circRNAs) are closely associated with various stages of carcinogenesis. However, very few studies have delineated the specific mechanism of association between circRNAs and osteosarcoma (OS). It offers a novel insight that circRNAs can be explored as a potential therapeutic strategy for OS.Materials and Methods: In this study, circTUBGCP3 was chosen from the existing reported circRNA microarray data obtained from OS cell lines and normal bone cells. Subsequently, qRT-PCR was performed to evaluate the expression level of circTUBGCP3 in OS samples and cell lines. Functional assays were conducted to estimate the impact of circTUBGCP3 on human OS cells proliferation, vitality, survivability, and migration. Western blot, luciferase reporter and in vivo tumorigenesis assays were performed to analyze the signaling pathways underlying the interaction of circTUBGCP3, miR-30b, and Vimentin.Results: The data indicate that circTUBGCP3 may act as a sponge of miR-30b that further alters the expression of Vimentin, and promotes the proliferation and metastatic properties of OS cells.Conclusion: circTUBGCP3 serves as a tumor promoter in tumorigenesis by increasing the possibilities of OS initiation and proliferation.Keywords: osteosarcoma, circular RNA, circTUBGCP3, miR-30b, Vimentin
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