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Isoliquiritigenin Suppresses Osteosarcoma U2OS Cell Proliferation and Invasion by Regulating the PI3K/Akt Signalling
Jing Chen1, Cheng Liu2, Qin-Qing Yang3
1Department of Orthopaedics, the Second Hospital of Peking Armed Polce, Beijing, China.
Aims:
Isoliquiritigenin (ISL) is a flavonoid, that has been shown to have antioxidant, vasorelaxant, anti-inflammatory, and antitumor activities. This study aimed to explore the antitumor effect of ISL on human osteosarcoma U2OS cells and investigate the mechanism of this effect.
Methods:
The effect of ISL on osteosarcoma U2OS cell proliferation, invasion, migration, and apoptosis were determined by a CCK8 assay, a transwell invasion assay, a transwell migration assay, and fluorescence-activated cell sorting, respectively. In addition, the protein expression levels of Bcl2, Bax, active Caspase-3, Akt, mTOR, p70, and Cyclin D1 were detected by western blotting.
Results:
ISL suppressed cell proliferation, inhibited invasion and migration, and promoted apoptosis in U2OS cells. After treatment with ISL, the protein expression levels of Bax and active Caspase-3 increased, while the level of Bcl-2 declined significantly. Furthermore, the phosphorylation levels of Akt and mTOR declined significantly compared with that of the control.
Conclusion:
ISL could retard proliferation and promote apoptosis of U2OS cells possibly by suppressing the PI3K/Akt signalling pathway, indicating that it might be a potential therapeutic agent for osteosarcoma treatment.
Insights
Isoliquiritigenin (ISL) effectively inhibits osteosarcoma cell growth and promotes apoptosis. This flavonoid may serve as a potential therapeutic agent for osteosarcoma by suppressing the PI3K/Akt signaling pathway.
Area of Science:
- Biochemistry
- Molecular Biology
- Oncology
Background:
- Isoliquiritigenin (ISL) is a flavonoid with known antioxidant, vasorelaxant, anti-inflammatory, and antitumor properties.
- Osteosarcoma is a primary bone cancer with significant treatment challenges.
Purpose of the Study:
- To investigate the antitumor effects of ISL on human osteosarcoma U2OS cells.
- To elucidate the underlying molecular mechanisms of ISL's action in osteosarcoma.
Main Methods:
- Cell proliferation, invasion, and migration assays (CCK8, Transwell).
- Apoptosis analysis using fluorescence-activated cell sorting.
- Western blotting to assess protein expression (Bcl-2, Bax, Caspase-3, Akt, mTOR, Cyclin D1).
Main Results:
- ISL significantly suppressed U2OS cell proliferation, invasion, and migration.
- ISL treatment promoted apoptosis, evidenced by increased Bax and active Caspase-3, and decreased Bcl-2.
- ISL reduced phosphorylation of Akt and mTOR, indicating PI3K/Akt pathway inhibition.
Conclusions:
- ISL exhibits potential as a therapeutic agent for osteosarcoma.
- ISL may exert its antitumor effects by suppressing the PI3K/Akt signaling pathway.
- Further research into ISL for osteosarcoma treatment is warranted.
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