Abstract
Asiatic acid (AA), a triterpene, is known to be cytotoxic to several tumor cell lines. AA induces dose- and time-dependent cell death in U-87 MG human glioblastoma. This cell death occurs via both apoptosis and necrosis. The effect of AA may be cell type-specific as AA-induced cell death was mainly apoptotic in colon cancer RKO cells. AA-induced glioblastoma cell death is associated with decreased mitochondrial membrane potential, activation of caspase-9 and -3, and increased intracellular free Ca2+. Although treatment of glioblastoma cells with the caspase inhibitor zVAD-fmk completely abolished AA-induced caspase activation, it did not significantly block AA-induced cell death. AA-induced cell death was significantly prevented by an intracellular Ca2+ inhibitor, BAPTA/AM. Taken together, these results indicate that AA induces cell death by both apoptosis and necrosis, with Ca2+-mediated necrotic cell death predominating.
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Abbreviations
- Δψm :
-
mitochondrial transmembrane potential
- AA:
-
asiatic acid
- AMC:
-
7-amino-4-methylcoumarin
- DEVD-AMC:
-
N-acetyl-Asp-Glu-Val-Asp-7-amino-4-methylcoumarin
- DiOC6(3):
-
3,3′-dihexyloxacarbocyanide iodide
- LDH:
-
lactate dehydrogenase
- LEHD-AMC:
-
N-acetyl-Leu-Glu-His-Asp-AMC
- PARP:
-
poly(ADP-ribose)-polymerase
- PCD:
-
programmed cell death
- PS:
-
phosphatidylserine
- S-LLVY-AMC:
-
succinyl-Leu-Leu-Val-Tyr-AMC
- STS:
-
staurosporine
- zVAD-fmk:
-
benzyloxycarbonyl-Val-Ala-Asp-fluoromethylketone
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Cho, C.W., Choi, D.S., Cardone, M.H. et al. Glioblastoma cell death induced by asiatic acid. Cell Biol Toxicol 22, 393–408 (2006). https://doi.org/10.1007/s10565-006-0104-2
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DOI: https://doi.org/10.1007/s10565-006-0104-2