Inhibition of Tumour Cell Growth by Hyperforin, a Novel Anticancer Drug from St
Oncogene (2002) 21, 1242 ± 1250 ã 2002 Nature Publishing Group All rights reserved 0950 ± 9232/02 $25.00 www.nature.com/onc Inhibition of tumour cell growth by hyperforin, a novel anticancer drug from St. John's wort that acts by induction of apoptosis Christoph M Schempp*,1, Vladimir Kirkin2, Birgit Simon-Haarhaus1, Astrid Kersten3, Judit Kiss1, Christian C Termeer1, Bernhard Gilb4, Thomas Kaufmann5, Christoph Borner5, Jonathan P Sleeman2 and Jan C Simon1 1Department of Dermatology, University of Freiburg, Hauptstrasse 7, D-79104 Freiburg, Germany; 2Institute of Genetics, Forschungszentrum Karlsruhe, PO Box 3640, D-76021 Karlsruhe, Germany; 3Institute of Pathology, University of Freiburg, Albertstrasse 19, D-79104 Freiburg, Germany; 4HWI Analytik, Hauptstrasse 28, 78106 Rheinzabern, Germany; 5Institute of Molecular Medicine, University of Freiburg, Breisacherstr. 66, D-79106 Freiburg, Germany Hyperforin is a plant derived antibiotic from St. John's Introduction wort. Here we describe a novel activity of hyperforin, namely its ability to inhibit the growth of tumour cells by An exciting aspect of apoptosis is that it can be utilized induction of apoptosis. Hyperforin inhibited the growth of in the treatment of cancer (Revillard et al., 1998; various human and rat tumour cell lines in vivo, with IC50 Nicholson, 2000). Anticancer agents with dierent values between 3 ± 15 mM. Treatment of tumour cells with modes of action have been reported to trigger hyperforin resulted in a dose-dependent generation of apoptosis in chemosensitive cells (Hickman, 1992; apoptotic oligonucleosomes, typical DNA-laddering and Debatin, 1999). The process of apoptosis consists of apoptosis-speci®c morphological changes. In MT-450 dierent phases, including initiation, execution and mammary carcinoma cells hyperforin increased the activity degradation (Kroemer, 1997), and is activated by two of caspase-9 and caspase-3, and hyperforin-mediated major pathways.
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