Prospects for plant-derived chemopreventive agents exhibiting multiple mechanisms of action
1Cancer Biomarkers and Prevention Group, Departments of Cancer Studies and Molecular Medicine/Biochemistry, University of Leicester, Leicester LE1 7RH, UK. lh28@le.ac.uk
Abstract:
There is great potential for the use of plant-derived agents in the fight to prevent onset or delay progression of the carcinogenic process. Epidemiological evidence for their chemopreventive action is compelling, but even though many of these compounds have an extensive history of use within the human populace, it is of increasing importance to determine more precisely the primary targets contributing to their efficacy, prior to embarking on large-scale clinical trials. This rapidly moving field now concentrates in particular, on the modulating effects these agents can have on cellular signalling pathways involved in the apoptotic, proliferative and angiogenic processes, perturbances to which, are common in many cancers. It is perhaps the ability of these agents to exhibit multi-site mechanisms of action that offers their key to success where conventional single-site agents have disappointed in the past. As well as being promising chemopreventive agents, there is also an exciting role for these compounds in combinatorial therapy with more traditional chemotherapeutics, potentially in lowering of toxicity and enhancing efficacy for treatment of more advanced cancers. This review will summarise known and proposed mechanisms of action for various chemopreventive agents of interest highlighting their potential in combination therapy, and will address benefits and problems of using such multi-site agents in long-term prevention/therapeutic regimes.
Insights
Plant-derived agents show promise in cancer prevention by targeting multiple cellular pathways. Their multi-site mechanisms offer advantages over single-target drugs and potential in combination cancer therapy.
Area of Science:
- Phytochemicals and Natural Products
- Cancer Chemoprevention
- Molecular Oncology
Background:
- Epidemiological data strongly supports the chemopreventive potential of plant-derived compounds.
- Many natural compounds have a long history of human use, suggesting a favorable safety profile.
- Understanding precise molecular targets is crucial before large-scale clinical trials.
Purpose of the Study:
- To review the known and proposed mechanisms of action for plant-derived chemopreventive agents.
- To highlight the potential of these agents in combination therapy with conventional chemotherapeutics.
- To address the benefits and challenges of using multi-site agents for long-term cancer prevention and therapy.
Main Methods:
- Review of existing literature on plant-derived agents and their effects on cancer-related cellular processes.
- Analysis of studies focusing on modulation of apoptosis, proliferation, and angiogenesis.
- Examination of evidence for multi-site mechanisms of action.
Main Results:
- Plant-derived agents modulate key cellular signaling pathways involved in cancer, including apoptosis, proliferation, and angiogenesis.
- The multi-site action of these agents is a key factor in their efficacy, potentially overcoming limitations of single-target drugs.
- These compounds show promise for combinatorial therapy, potentially reducing toxicity and enhancing efficacy in advanced cancers.
Conclusions:
- Plant-derived agents represent a promising strategy for cancer chemoprevention due to their multi-target mechanisms.
- Further research into their precise molecular targets is warranted to optimize their clinical application.
- Combinatorial approaches using these agents may offer improved therapeutic outcomes for cancer patients.
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