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Updated: Jul 18, 2025

Intratibial Osteosarcoma Cell Injection to Generate Orthotopic Osteosarcoma and Lung Metastasis Mouse Models
Published on: October 28, 2021
Circ_0088212 Targeting miR-576-5p/FKBP1A Axis Inhibits Osteosarcoma Progression
1Joint Sugery, Puren Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, Hubei, China.
Objective:
Circular RNAs (circRNA) have been proven to be critical regulators of gene expression and biological functions. Nevertheless, there remains a need to elaborate on how circRNAs operate in osteosarcoma (OS). In this study, we investigated the function of circ_0088212 in OS.
Methods:
The circ_0088212, miR-576-5p, and FKBP1A levels in OS cell lines and tissues were estimated by qRT-PCR. Changes in cell function were examined using CCK-8, transwell migration, and xenograft tumor experiments. The protein expression of B-cell lymphoma-2 (Bcl-2) and Bcl-2 associated X protein (Bax) in OS cells was estimated using western blotting. Dual-luciferase reporter gene and RNA immunoprecipitation assays were performed to verify the relationship among circ_0088212, miR-576-5p, and FKBP1A expression.
Results:
OS cells and tissues exhibited downregulated circ_0088212 expression. Moreover, circ_0088212 overexpression impaired the proliferation and migration of OS cells and boosted their apoptosis. In vivo, circ_0088212 overexpression suppresses tumor growth. The miR-576-5p/FKBP1A axis is downstream of circ_0088212. Furthermore, this axis may regulate the effects of circ_0088212 in OS cells.
Conclusion:
This study demonstrated that circ_0088212 impedes OS progression by regulating the miR-576-5p/FKBP1A axis. These findings provide a comprehensive understanding of the role of circ_0088212 in OS tumorigenesis.
Insights
Circular RNA circ_0088212 inhibits osteosarcoma progression by regulating the miR-576-5p/FKBP1A axis. Overexpression of circ_0088212 suppressed tumor growth, proliferation, and migration while enhancing apoptosis in osteosarcoma cells.
Area of Science:
- Oncology
- Molecular Biology
- Gene Regulation
Background:
- Circular RNAs (circRNAs) are key gene expression regulators.
- The specific role of circRNAs in osteosarcoma (OS) requires further elucidation.
Purpose of the Study:
- To investigate the function of circ_0088212 in osteosarcoma (OS).
Main Methods:
- Quantification of circ_0088212, miR-576-5p, and FKBP1A via qRT-PCR.
- Cellular function assays (proliferation, migration, apoptosis) and in vivo xenograft experiments.
- Western blotting for apoptosis-related proteins (Bcl-2, Bax) and dual-luciferase/RNA immunoprecipitation assays to confirm molecular interactions.
Main Results:
- circ_0088212 expression was downregulated in OS cells and tissues.
- Overexpression of circ_0088212 inhibited OS cell proliferation and migration, and increased apoptosis.
- circ_0088212 overexpression suppressed tumor growth in vivo, mediated by the miR-576-5p/FKBP1A axis.
Conclusions:
- circ_0088212 acts as a tumor suppressor in osteosarcoma.
- The miR-576-5p/FKBP1A axis is a key downstream pathway regulated by circ_0088212 in OS.
- circ_0088212 holds potential as a therapeutic target for osteosarcoma.
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