Publication: Betulinic acid, a natural cytotoxic agent, fails to trigger apoptosis in human Burkitt's lymphoma-derived B-cell lines
Issued Date
2006-01-01
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ISSN
00207136
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2-s2.0-27944485271
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Mahidol University
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SCOPUS
Bibliographic Citation
International Journal of Cancer. Vol.118, No.1 (2006), 246-252
Suggested Citation
Maria B. Karpova, Duangmanee Sanmun, Jan Inge Henter, Aleksandr F. Smirnov, Bengt Fadeel Betulinic acid, a natural cytotoxic agent, fails to trigger apoptosis in human Burkitt's lymphoma-derived B-cell lines. International Journal of Cancer. Vol.118, No.1 (2006), 246-252. doi:10.1002/ijc.21311 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/23115
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Title
Betulinic acid, a natural cytotoxic agent, fails to trigger apoptosis in human Burkitt's lymphoma-derived B-cell lines
Abstract
Betulinic acid (BA), a pentacyclic triterpene of natural origin, effectively induces apoptosis in neuroectodermal tumors and was recently shown to be a potent trigger of cell death in human leukemia-derived cell lines. To explore the potential of BA in the treatment of hematologic malignancies, we tested a panel of 10 Burkitt's lymphoma (BL)-derived B-cell lines for sensitivity to BA. The human Jurkat T leukemia cell line was included as a positive control. Our studies show that BA exerts cytotoxic effects in some of the BL cell lines tested, including DG75, a chemoresistant BL cell line. However, cell death was caspase-independent, as evidenced by a lack of protection by zVAD-fmk, a pancaspase inhibitor, and displayed signs of necrosis. Furthermore, BA-induced caspase activation was seen to a minor extent in only 1 of the 10 BL cell lines tested (Ramos, a p53-deficient cell line), but was readily detected in Jurkat cells. Together, these studies indicate that resistance to BA-induced apoptosis is a common feature of BL-derived cell lines. © 2005 Wiley-Liss, Inc.