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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Zhang, Shiming Chen, Hui Gerhard, Glenn S. |
| Description | Country affiliation: United States Author Affiliation: Zhang S ( Weis Center for Research, Geisinger Clinic, 100 North Academy Avenue, Danville, PA 17822, USA. szhang1@geisinger.edu) |
| Abstract | Artemisinin (ART) is a sesquiterpene lactone natural product that is widely used to treat multi-drug resistant strains of malaria. Artemisinin and its derivatives are also selectively cytotoxic to cancer cells, which can be modulated by altering heme synthesis. Cytotoxicity to cancer cells is thought to involve generation of oxidative stress, although conflicting data exist. We have analyzed reactive oxygen species (ROS) generation using the fluorescent probes 2',7'-dichlorodihydrofluorescein diacetate (DCF) and dihydroethidine (HET) upon exposure to dihydroartemisinin (DHA) in Molt-4 leukemia cells. HET fluorescence correlated with dose-dependent DHA-induced cytotoxicity, increased within 30 min of DHA exposure, and was significantly enhanced by increasing heme synthesis. Protein levels of copper, zinc-superoxide dismutase (CuZnSOD), manganese-superoxide dismutase (MnSOD), catalase, and glutathione peroxidases 1/2 were also found to increase with DHA exposure. 4-hydroxy-tempol (TEMPOL) and DF-Mn, MnSOD mimetics, could significantly inhibit ROS generation and reduce cell death. Production of superoxide appears to be a central mediator of cytotoxicity from DHA. |
| File Format | HTM / HTML |
| ISSN | 00092797 |
| Issue Number | 1 |
| Volume Number | 186 |
| e-ISSN | 18727786 |
| Journal | Chemico-Biological Interactions |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2010-06-07 |
| Publisher Place | Ireland |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Biochemistry Discipline Pharmacology Antimalarials Pharmacology Artemisinins Cytotoxins Heme Metabolism Leukemia Reactive Oxygen Species Catalase Cell Death Drug Effects Cell Line, Tumor Dicarbethoxydihydrocollidine Analogs & Derivatives Fluoresceins Free Radical Scavengers Glutathione Peroxidase Humans Drug Therapy Superoxide Dismutase Superoxides Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine Toxicology |
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