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- W2937062829 abstract "MicroRNA-665 inhibits the oncogenicity of retinoblastoma by directly targeting high-mobility group box 1 and inactivating the Wnt/β-catenin pathway Shuai Wang, Shanshan Du, Yong Lv, Fengyan Zhang, Wenzhan WangDepartment of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, People’s Republic of ChinaPurpose: Previous studies have revealed that microRNA-665 (miR-665) is dysregulated in a variety of human cancers. However, little is known regarding its expression profiles and functions in retinoblastoma (RB). Therefore, the aims of our study were to evaluate miR-665 expression in RB and determine the precise roles of miR-665 in the progression of RB.Patients and methods: Herein, RT-qPCR was used to determine miR-665 expression levels in RB tissues and cell lines, and a series of functional experiments were performed to explore the influence of miR-665 on RB cell proliferation, colony formation, apoptosis, migration, and invasion as well as tumor growth. The molecular mechanisms underlying the tumor-suppressive action of miR-665 in RB were also explored.Results: We found that miR-665 was markedly reduced in RB tissues and cell lines and that lower miR-665 expression was strongly associated with tumor size, TNM stage, and differentiation in patients with RB. Exogenous expression of miR-665 suppressed cell proliferation, colony formation, migration, and invasion, and induced cell apoptosis in RB cells, while silencing miR-665 expression had the opposite effects. In addition, upregulation of miR-665 decreased the tumor growth of RB cells in vivo. High-mobility group box 1 (HMGB1) was identified as a direct target of miR-665 in RB cells, and decreasing the expression of HMGB1 simulated the regulatory effects of miR-665 overexpression in RB cells, while knockdown of HMGB1 expression counteracted the miR-665-mediated antitumor effects in RB cells. Moreover, miR-665 was shown to regulate the Wnt/β-catenin signaling pathway by targeting HMGB1 in vitro and in vivo.Conclusion: Taken together, our in vitro and in vivo results suggest that miR-665 acts as a tumor-suppressive miRNA in RB by directly targeting HMGB1 and inactivating the Wnt/β-catenin pathway. Hence, this miRNA is a candidate prognostic biomarker and therapeutic target in patients with RB.Keywords: microRNA-665, retinoblastoma, high-mobility group box 1, Wnt/β-catenin pathway, oncogenicity" @default.
- W2937062829 created "2019-04-25" @default.
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- W2937062829 date "2019-04-01" @default.
- W2937062829 modified "2023-10-18" @default.
- W2937062829 title "<p>MicroRNA-665 inhibits the oncogenicity of retinoblastoma by directly targeting high-mobility group box 1 and inactivating the Wnt/β-catenin pathway</p>" @default.
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- W2937062829 doi "https://doi.org/10.2147/cmar.s200566" @default.
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