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Updated: Dec 31, 2025
Intratibial Osteosarcoma Cell Injection to Generate Orthotopic Osteosarcoma and Lung Metastasis Mouse Models
Published on: October 28, 2021
miR-29a inhibits adhesion, migration, and invasion of osteosarcoma cells by suppressing CDC42
Zheng-Jie Liu1, Shun-Guang Chen1, Ye-Zi Yang2
1Department of Orthopedics, Jingzhou Central Hospital, The Second Clinical Medical College, Yangtze University Jingzhou, Hubei, P. R. China.
Abstract:
Osteosarcoma is one of the most common tumors of the bone in children and adolescents worldwide. The relapse and metastasis of osteosarcoma are a major therapeutic challenge. Recently, several metastasis regulators, including miRNAs, kinases, and lncRNAs, were reported in osteosarcoma. Identifying novel regulators of metastasis will be useful to explore novel biomarkers for osteosarcoma. The present study showed miR-29a overexpression significantly inhibited HOS and MG-63 cell adhesion, invasion, and migration. About 70% of the wound area was repaired by migrating cells after 24 h in the control group, and only 50% of the wound area was repaired in the miR-29a overexpression group. The numbers of invading cells were decreased by 40% and 50% in HOS and MG-63 cells transfected with miR-29a, respectively, compared with the negative control group. Moreover, the present study validated that CDC42 was a direct target of miR-29a in OS cells. In conclusion, miR-29a may serve as a therapeutic target for osteosarcoma.
Insights
MicroRNA-29a (miR-29a) overexpression inhibits osteosarcoma cell invasion and migration. This finding suggests miR-29a could be a potential therapeutic target for treating bone cancer metastasis.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Osteosarcoma is a prevalent bone tumor in children and adolescents.
- Metastasis and relapse pose significant therapeutic challenges in osteosarcoma treatment.
- MicroRNAs (miRNAs), kinases, and lncRNAs are emerging as key regulators of osteosarcoma metastasis.
Purpose of the Study:
- To investigate the role of miR-29a in regulating osteosarcoma cell metastasis.
- To identify novel metastasis regulators and potential biomarkers for osteosarcoma.
Main Methods:
- Overexpression of miR-29a in HOS and MG-63 osteosarcoma cell lines.
- Assessment of cell adhesion, invasion, and migration using wound healing and cell invasion assays.
- Validation of CDC42 as a direct target of miR-29a in osteosarcoma cells.
Main Results:
- miR-29a overexpression significantly inhibited HOS and MG-63 cell adhesion, invasion, and migration.
- Wound healing assays showed reduced cell migration in miR-29a overexpressing cells (50% repair vs. 70% in control).
- Invasion assays demonstrated a 40-50% decrease in invading cells in miR-29a transfected groups.
- CDC42 was confirmed as a direct target of miR-29a in osteosarcoma cells.
Conclusions:
- miR-29a plays a crucial role in suppressing osteosarcoma cell metastasis.
- miR-29a may serve as a potential therapeutic target for inhibiting osteosarcoma progression and metastasis.
- Targeting miR-29a could offer a novel strategy for osteosarcoma treatment.
