Discovery of Natural Products for Cancer Prevention
Peter J Blanco Carcache1, Steven K Clinton, A Douglas Kinghorn
1From the College of Pharmacy and the College of Medicine, The Ohio State University, Columbus, OH.
Abstract:
"Cancer chemoprevention" is a term referring to the slowing or reversal of this disease, using nontoxic natural or synthetic compounds. For about 50 years, there has been a strong scientific interest in discovering plant-derived compounds to prevent cancer, and strategies for this purpose using a concerted series of in vitro, ex vivo, and in vivo laboratory bioassays have been developed. Five examples of the more thoroughly investigated agents of this type are described herein, which are each supported by detailed literature reports, inclusive of ellagic acid, isoliquiritigenin, lycopene, trans-resveratrol, and sulforaphane. In addition, extracts of the plants avocado (Persea americana), noni (Morinda citrifolia), açai (Euterpe oleracea), and mangosteen (Garcinia mangostana) have all shown inhibitory activity in an in vivo or ex vivo bioassay using a carcinogen and germane to cancer chemoprevention, and selected in vitro-active constituents are described for each of these 4 species.
Insights
This study explores cancer chemoprevention using natural compounds. It reviews five key agents and four plant extracts with demonstrated cancer-inhibiting properties in laboratory bioassays.
Area of Science:
- Natural product chemistry
- Pharmacology
- Oncology
Background:
- Cancer chemoprevention involves using non-toxic compounds to slow or reverse cancer progression.
- There is a long-standing scientific interest in identifying plant-derived compounds for cancer prevention.
- Laboratory bioassays (in vitro, ex vivo, in vivo) are crucial for developing chemoprevention strategies.
Purpose of the Study:
- To review extensively studied plant-derived compounds for cancer chemoprevention.
- To describe selected active constituents from four specific plant extracts with demonstrated anticancer activity.
- To highlight the scientific progress in discovering natural agents for cancer prevention.
Main Methods:
- Literature review of established chemopreventive agents.
- Description of in vitro, ex vivo, and in vivo bioassays used in cancer chemoprevention research.
- Analysis of specific compounds from plant extracts like avocado, noni, açai, and mangosteen.
Main Results:
- Five key chemopreventive agents are detailed: ellagic acid, isoliquiritigenin, lycopene, trans-resveratrol, and sulforaphane.
- Avocado, noni, açai, and mangosteen extracts exhibit inhibitory activity against carcinogens in bioassays.
- Selected in vitro active constituents from these four plant species are identified.
Conclusions:
- Natural compounds, including specific phytochemicals and plant extracts, show significant promise in cancer chemoprevention.
- Continued research into plant-derived agents is vital for developing novel strategies against cancer.
- The reviewed agents and extracts represent valuable leads for further investigation in cancer prevention therapies.
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