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Article: Dihydro-alpha-lipoic acid has more potent cytotoxicity than alpha-lipoic acid

Article from:
In Vitro Cellular & Developmental Biology
Article date:
May 1, 2009
Author:
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Abstract Alpha-lipoic acid has been shown to possess cancer-cell-killing activity via activation of the apoptosis pathway. In this study, the cytotoxic activities of alpha-lipoic and dihydro-alpha-lipoic acid were compared in HL-60 cells. The cell-killing activity of dihydro-alpha-lipoic acid was higher than that of alpha-lipoic acid. Both alpha-lipoic and dihydro-alpha-lipoic acid induced caspase-3 cleavage and internucleosomal DNA fragmentation in treated cells. On the other hand, apparent necrotic or late-stage apoptotic cell populations could be detected in dihydro-alpha-lipoic acid cells but not in those treated with alpha-lipoic acid. Moreover, dihydro-alpha-lipoic acid, but not ...

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