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Updated: Mar 28, 2026
Three-Dimensional Bone Extracellular Matrix Model for Osteosarcoma
Published on: April 12, 2019
Decreased miR-134 expression and its tumor-suppressive function in human osteosarcoma
1Department of Orthopedics, Medical School of Yangtze University, Jingzhou, Hubei Province, China.
Abstract:
Dysregulation of microRNA (miR) is often associated with cancer development and progression. Aberrant expression of miR-134 has been found in some types of cancer. However, its expression and function in osteosarcoma remain unclear. The aim of this study was to explore the effects of miR-134 in osteosarcoma tumorigenesis and development. The expression level of miR-134 was quantified by real-time reverse transcription-polymerase chain reaction in human osteosarcoma cell lines and tissues. The effects of miR-134 on MG-63 cell phenotypes and tumorigenicity in vivo were observed using flow cytometry, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide, transwell invasion, migration, and scratch migration assays. MiR-134 was significantly downregulated in osteosarcoma cell lines and clinical specimens. Decreased miR-134 expression was significantly associated with large tumor size, positive distant metastasis, and advanced clinical stage. Low miR-134 expression in osteosarcoma was an independent predictor of poor survival. Overexpression of miR-134 inhibited MG-63 cell proliferation, invasion, and migration, promoted cell apoptosis in vitro, and suppressed tumorigenicity in vivo. These findings indicate that miR-134 may act as a tumor suppressor in osteosarcoma and could serve as a novel therapeutic agent for miRNA-based therapy.
Insights
MicroRNA-134 (miR-134) is downregulated in osteosarcoma, inhibiting tumor growth and metastasis. Restoring miR-134 levels may offer a new therapeutic strategy for this bone cancer.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- MicroRNA (miR) dysregulation is linked to cancer development.
- Aberrant miR-134 expression is observed in various cancers, but its role in osteosarcoma is unknown.
Purpose of the Study:
- To investigate the expression and function of miR-134 in osteosarcoma.
- To determine if miR-134 acts as a tumor suppressor in osteosarcoma.
Main Methods:
- Quantified miR-134 expression using real-time RT-PCR in osteosarcoma cell lines and tissues.
- Assessed miR-134's effects on cell proliferation, apoptosis, invasion, and migration in vitro (MG-63 cells).
- Evaluated miR-134's impact on tumorigenicity in vivo.
Main Results:
- miR-134 was significantly downregulated in osteosarcoma cells and tissues.
- Low miR-134 expression correlated with larger tumor size, metastasis, and advanced stage, predicting poor survival.
- Overexpressing miR-134 suppressed osteosarcoma cell proliferation, invasion, migration, and in vivo tumor growth, while promoting apoptosis.
Conclusions:
- miR-134 functions as a tumor suppressor in osteosarcoma.
- miR-134 represents a potential novel therapeutic target for osteosarcoma miRNA-based therapy.
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