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Multimodal antiproliferative effects of oleanolic acid mitocans: In vitro and in vivo studies
Adrián Puerta1, Aday González-Bakker1, Eduardo Romanos2
1BioLab, Instituto Universitario de Bio-Orgánica Antonio González (IUBO-AG), Universidad de La Laguna, Apartado 456, E-38200 La Laguna, Spain.
Abstract:
Mitochondria-targeting drugs (mitocans) based on organic cations are emerging as powerful and selective cancer therapeutics. In this study, we have evaluated a novel series of oleanolic acid-derived mitocans, revealing nanomolar-range antiproliferative effects against human solid tumor cells. Continuous live-cell imaging revealed extensive cytoplasmic vacuolation, while mechanistic studies identified paraptosis as the dominant form of cell death. Remarkably, in vivo experiments demonstrated significant tumor growth inhibition in mice, with no detectable toxicity at therapeutic doses. These findings highlight the potential of oleanolic acid-derived mitocans as promising candidates for cancer therapy.
Insights
Novel oleanolic acid-derived mitochondria-targeting drugs (mitocans) show potent anticancer effects. These mitocans induce paraptosis, significantly inhibit tumor growth in vivo, and exhibit no detectable toxicity, offering promising cancer therapeutic potential.
Area of Science:
- Mitochondrial medicine
- Cancer therapeutics
- Drug discovery
Background:
- Mitochondria-targeting drugs (mitocans) utilizing organic cations are advanced cancer therapeutics.
- Oleanolic acid derivatives represent a novel class of potential mitocans.
Purpose of the Study:
- To evaluate a new series of oleanolic acid-derived mitocans for anticancer activity.
- To investigate the mechanism of cell death induced by these compounds.
- To assess the in vivo efficacy and toxicity of these novel mitocans.
Main Methods:
- Synthesis and characterization of oleanolic acid-derived mitocans.
- In vitro antiproliferative assays against human solid tumor cells.
- Live-cell imaging to observe cellular responses.
- Mechanistic studies to determine the mode of cell death.
- In vivo tumor xenograft models in mice to evaluate efficacy and toxicity.
Main Results:
- Oleanolic acid-derived mitocans demonstrated nanomolar antiproliferative effects against human solid tumor cells.
- Live-cell imaging revealed significant cytoplasmic vacuolation.
- Mechanistic studies identified paraptosis as the primary cell death pathway.
- In vivo studies showed substantial tumor growth inhibition in mice.
- Therapeutic doses of these mitocans exhibited no detectable toxicity.
Conclusions:
- Oleanolic acid-derived mitocans are potent anticancer agents.
- Paraptosis induction is a key mechanism of their efficacy.
- These compounds show significant promise for in vivo cancer therapy with a favorable safety profile.
