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Published on: November 10, 2013
Analysis of Antiangiogenic Potential and Cell Death Mechanism of a Kinetically Inert Platinum Antitumor Agent
Manikandan M1, Sushanta Chhatar1, Saurabh Dey2
1Medicinal Chemistry and Cell Biology Laboratory, Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai, Maharashtra 400005, India.
Abstract:
Cancer is a multifaceted disease involving various pathological processes, including uncontrolled proliferation, development of resistance, angiogenesis, metastasis, etc. Therefore, chemotherapeutic agents capable of simultaneously inhibiting proliferation, circumventing chemoresistance, and inhibiting angiogenesis can address multiple aspects of cancer progression. We recently identified a highly promising kinetically inert platinum antitumor agent, namely, Pt-1, that can circumvent cisplatin resistance and showed negligible nephrotoxicity. In this study, we explored the antiangiogenic potential and elucidated the detailed mechanism of cell death through which it exerts its antitumor activity. Pt-1 strongly inhibited angiogenesis in a zebrafish in vivo model at its therapeutically relevant nontoxic dose. Further, Pt-1 exerted antitumor activity through necroptosis- and paraptosis-mediated cell death. Taken together, the combination of antitumor activity with antiangiogenic property in Pt-1 makes it a highly promising antitumor candidate.
Insights
A novel platinum compound, Pt-1, effectively combats cancer by inhibiting proliferation and angiogenesis while overcoming chemoresistance. It induces cell death via necroptosis and paraptosis with minimal toxicity, showing significant therapeutic promise.
Area of Science:
- Oncology
- Pharmacology
- Biochemistry
Background:
- Cancer involves complex processes like proliferation, resistance, and angiogenesis.
- Existing chemotherapies face challenges with resistance and toxicity.
- Targeting multiple pathways simultaneously offers a promising therapeutic strategy.
Purpose of the Study:
- To investigate the antiangiogenic potential of the platinum compound Pt-1.
- To elucidate the cell death mechanisms underlying Pt-1's antitumor activity.
- To evaluate Pt-1 as a multifaceted anticancer agent.
Main Methods:
- In vivo antiangiogenesis assay using a zebrafish model.
- Cell death pathway analysis (necroptosis and paraptosis).
- Assessment of Pt-1's efficacy at therapeutically relevant doses.
Main Results:
- Pt-1 demonstrated significant inhibition of angiogenesis in vivo.
- Pt-1 induced cancer cell death through both necroptosis and paraptosis.
- The compound exhibited antitumor activity at non-toxic, therapeutically relevant concentrations.
Conclusions:
- Pt-1 possesses potent antiangiogenic properties.
- Pt-1 effectively triggers antitumor responses via specific cell death pathways.
- The dual action of antitumor and antiangiogenic effects makes Pt-1 a promising candidate for cancer therapy.
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