Reversal of Multidrug Resistance in Cancer by Multi-Functional Flavonoids
Qingmei Ye1, Kai Liu1, Qun Shen1
1Hainan General Hospital, Haikou, China.
Abstract:
Multidrug resistance (MDR) resulting from different defensive mechanisms in cancer is one of the major obstacles of clinical treatment. To circumvent MDR many reversal agents have been developed, but most of them fail in clinical trials due to severely adverse effects. Recently, certain natural products have been reported to overcome MDR, including flavonoids which are abundant in plants, foods, and herbs. The structure of flavonoids can be abbreviated as C6-C3-C6 (C for carbon), and further categorized into flavonoids, iso-flavonoids and neo-flavonoids, according to their structural backbones. Flavonoids possess multiple bioactivities, and a growing body of research has indicated that both flavonoids and iso-flavonoids can either kill or re-sensitize conventional chemotherapeutics to resistant cancer cells. Here, we summarize the research and discuss the underlying mechanisms, concluding that these flavonoids do not function as specific regulators of target proteins, but rather as multi-functional agents that negatively regulate the key factors contributing to MDR.
Insights
Flavonoids, natural compounds found in plants, can overcome multidrug resistance (MDR) in cancer. These compounds act as multi-functional agents, targeting key factors contributing to MDR without specific protein regulation.
Area of Science:
- Biochemistry
- Pharmacology
- Oncology
Background:
- Multidrug resistance (MDR) in cancer presents a significant clinical treatment challenge.
- Existing MDR reversal agents often fail due to adverse effects.
- Natural products, particularly flavonoids, show promise in overcoming MDR.
Purpose of the Study:
- To review and discuss the mechanisms by which flavonoids and iso-flavonoids overcome MDR.
- To highlight the multi-functional nature of these compounds in combating cancer resistance.
Main Methods:
- Literature review of research on flavonoids and cancer MDR.
- Analysis of structural classifications of flavonoids (flavonoids, iso-flavonoids, neo-flavonoids).
- Discussion of bioactivities and underlying mechanisms of action.
Main Results:
- Flavonoids and iso-flavonoids demonstrate the ability to kill or re-sensitize resistant cancer cells.
- These compounds exhibit multi-functional activity rather than specific target protein regulation.
- Key factors contributing to MDR are negatively regulated by flavonoids.
Conclusions:
- Flavonoids represent a promising class of natural products for overcoming cancer MDR.
- Their multi-functional mechanism offers an alternative approach to MDR reversal.
- Further research into flavonoids could lead to improved cancer therapies.
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