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Published on: March 18, 2014
Nimbolide Induces ROS-Regulated Apoptosis and Inhibits Cell Migration in Osteosarcoma
Ju-Fang Liu1, Chun-Han Hou2, Feng-Ling Lin3
1Central Laboratory, Shin-Kong Wu Ho-Su Memorial Hospital, Taipei 11101, Taiwan. anti0822@hotmail.com.
Abstract:
Osteosarcoma (OS) is a primary malignant tumor of bone and is most prevalent in children and adolescents. OS is frequently associated with pulmonary metastasis, which is the main cause of OS-related mortality. OS has a poor prognosis and is often unresponsive to conventional chemotherapy. In this study, we determined that Nimbolide, a novel anti-cancer therapy, acts by modulating multiple mechanisms in osteosarcoma cells. Nimbolide induces apoptosis by increasing endoplasmic reticulum (ER) stress, mitochondrial dysfunction, accumulation of reactive oxygen species (ROS), and finally, caspase activation. We also determined that Nimbolide inhibits cell migration, which is crucial for metastasis, by reducing the expression of integrin αvβ5. In addition, our results demonstrate that integrin αvβ5 expression is modulated by the PI3K/Akt and NF-κB signaling cascade. Nimbolide has potential as an anti-tumor drug given its multifunctional effects in OS. Collectively, these results help us to understand the mechanisms of action of Nimbolide and will aid in the development of effective therapies for OS.
Insights
Nimbolide, a novel therapy, combats osteosarcoma (OS) by inducing cancer cell death and inhibiting metastasis. This research reveals its potential as an effective anti-tumor drug for OS treatment.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Osteosarcoma (OS) is a primary bone cancer common in children and adolescents.
- Pulmonary metastasis significantly contributes to OS mortality, with limited treatment options.
- Existing chemotherapy often proves ineffective against OS.
Purpose of the Study:
- To investigate the anti-cancer mechanisms of Nimbolide in osteosarcoma cells.
- To evaluate Nimbolide's potential as a novel therapeutic agent for OS.
Main Methods:
- Assessed Nimbolide's impact on apoptosis through endoplasmic reticulum (ER) stress, mitochondrial dysfunction, reactive oxygen species (ROS) accumulation, and caspase activation.
- Examined Nimbolide's effect on cell migration by measuring integrin αvβ5 expression.
- Investigated the role of PI3K/Akt and NF-κB signaling pathways in regulating integrin αvβ5.
Main Results:
- Nimbolide induced apoptosis in osteosarcoma cells via ER stress, mitochondrial dysfunction, ROS generation, and caspase activation.
- Nimbolide significantly reduced cancer cell migration by decreasing integrin αvβ5 expression.
- Integrin αvβ5 expression was found to be modulated by the PI3K/Akt and NF-κB signaling pathways.
Conclusions:
- Nimbolide exhibits multifunctional anti-cancer effects against osteosarcoma.
- The compound's ability to induce apoptosis and inhibit metastasis suggests its therapeutic potential.
- Understanding Nimbolide's mechanisms of action can guide the development of advanced OS therapies.
