Broad targeting of triptolide to resistance and sensitization for cancer therapy
Zhen-Yan Hou1, Xiao-Pei Tong1, Yong-Bo Peng2
1Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha 410011, China; Institute of Clinical Pharmacy, Central South University, Changsha 410011, China.
Abstract:
Cancer cell resistance to current anticancer therapeutics as well as the side effects are still obstacles to successful cancer therapy. Hence, the development of novel anticancer agents or therapeutics is of vital significance, and especially rational adjuvant therapies containing low-cost natural products with multiple targets have attracted great interests. Triptolide, the main biocomponent of Tripterygium wilfordii Hook F, is restricted in clinical applications mainly due to its severe systemic toxicities, although it has shown strong antitumor activities in preclinical studies. Mounting evidence suggests that triptolide at low doses as an adjuvant therapeutic agent circumvents resistance to current anticancer therapies, enhances the anticancer effectiveness, and relieves toxicities of both triptolide and anticancer therapies. Furthermore, several unique antitumor targets of triptolide make it superior to other therapeutics. The molecular mechanisms of triptolide-induced anti-resistance and sensitization effects include changes in ATP-binding cassette transporters, induction of apoptosis pathways, increase in tumor suppressors and decrease in oncogenic factors, and interactions with the RNA polymerase II complex; targeting cancer stem cells and tumor-microenvironment-mediated resistance are also involved. Besides, some synthetic derivatives and novel delivery systems of triptolide are also developed to enhance the water-solubility and reduce the toxicity, which will also be discussed.
Insights
Low-dose triptolide, a natural compound, shows promise as an adjuvant cancer therapy. It overcomes drug resistance, enhances treatment efficacy, and reduces side effects, offering a novel approach to cancer treatment.
Area of Science:
- Pharmacology
- Oncology
- Natural Products Chemistry
Background:
- Cancer therapy faces challenges due to drug resistance and severe side effects.
- Natural products offer potential as adjuvant therapies due to their multi-target capabilities and lower costs.
- Triptolide, from Tripterygium wilfordii, exhibits potent antitumor activity but is limited by systemic toxicity.
Purpose of the Study:
- To explore the potential of low-dose triptolide as an adjuvant therapeutic agent in cancer treatment.
- To investigate the mechanisms by which triptolide circumvents anticancer drug resistance and enhances therapeutic effectiveness.
- To review the development of triptolide derivatives and delivery systems to improve its clinical applicability.
Main Methods:
- Review of preclinical and clinical evidence on triptolide's adjuvant effects.
- Analysis of molecular mechanisms underlying triptolide's anti-resistance and sensitization properties.
- Examination of synthetic derivatives and novel drug delivery systems for triptolide.
Main Results:
- Low-dose triptolide effectively overcomes resistance to existing anticancer therapies.
- Triptolide enhances the efficacy of conventional anticancer treatments and reduces associated toxicities.
- Mechanisms include modulation of ATP-binding cassette transporters, apoptosis pathways, tumor suppressors, oncogenic factors, and RNA polymerase II complex.
Conclusions:
- Triptolide at low doses represents a promising adjuvant therapy for overcoming cancer resistance and improving treatment outcomes.
- Its unique targets and ability to mitigate toxicity offer advantages over other therapeutics.
- Development of triptolide derivatives and advanced delivery systems holds potential for enhanced clinical use.
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