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Thapsigargin, Origin, Chemistry, Structure-Activity Relationships and Prodrug Development
Nhu Thi Quynh Doan, Soren Brogger Christensen1
1Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences University of Copenhagen, Universitetsparken 2, DK-2100 Copehagen O, Denmark. soren.christensen@sund.ku.dk.
Thapsigargin, a plant-derived compound, targets calcium pumps to induce cancer cell death. Novel prodrugs, like mipsagargin, show promise for treating liver and prostate cancers.
Area of Science:
- Biochemistry
- Pharmacology
- Oncology
Background:
- Thapsigargin, isolated from Thapsia garganica, is a potent inhibitor of the sarco/endoplasmic reticulum calcium ATPase.
- Its mechanism involves disrupting calcium homeostasis, leading to apoptosis.
Purpose of the Study:
- To review the chemical properties and biological activity of thapsigargin.
- To explore the development of targeted prodrugs for cancer therapy.
Main Methods:
- Characterization of thapsigargin's chemical properties and semi-synthesis.
- Structure-activity relationship studies to design analogues.
- Conjugation of analogues with cancer-specific peptides (PSA, PSMA) to create prodrugs.
Main Results:
- Thapsigargin exhibits subnanomolar affinity for the calcium ATPase.
- Prodrugs G115 and G202 were designed, targeting prostate and liver cancers, respectively.
- Mipsagargin (G202) demonstrated promising efficacy in Phase II clinical trials for hepatocellular carcinoma.
Conclusions:
- Thapsigargin's mechanism provides a basis for developing novel cancer therapeutics.
- Targeted prodrug strategies utilizing thapsigargin analogues show potential in clinical settings.
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