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- W2048580070 abstract "Abstract Cisplatin is a broad‐spectrum anticancer drug that is also widely used in experimental studies on DNA damage‐induced apoptosis. Induction of apoptosis within 24–48 hr requires cisplatin concentrations that are at least one order of magnitude higher than the IC 50 . Here, we show that such high, apoptosis‐inducing cisplatin concentrations induce cellular superoxide formation and that apoptosis is inhibited by superoxide scavengers. The same concentration limit and the requirement for superoxide are also true for induction of caspase activation in enucleated cells (cytoplasts), showing that cisplatin‐induced apoptosis occurs independently of nuclear DNA damage. In contrast, lower cisplatin concentrations, which do not induce acute apoptosis, are sufficient for induction of DNA damage signaling. We propose that the antiproliferative effects of cisplatin at IC 50 doses involve premature senescence and secondary, nonstress‐induced apoptosis. The higher doses currently used in in vitro studies lead to acute, stress‐induced apoptosis that involves induction of superoxide but is largely DNA damage‐independent. © 2006 Wiley‐Liss, Inc." @default.
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- W2048580070 date "2006-10-16" @default.
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- W2048580070 title "Acute apoptosis by cisplatin requires induction of reactive oxygen species but is not associated with damage to nuclear DNA" @default.
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- W2048580070 doi "https://doi.org/10.1002/ijc.22132" @default.
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