Abstract
We investigated the effect of diethylhexylphthalate (DEHP) from Aloe vera Linne on the apoptosis of human leukaemic cell lines K562, HL60 and U937 to examine its pharmacological activity. At a level of 10 microg mL(-1) DEHP a significant anti-leukaemic effect was observed for all three cell lines, as measured by clonogenic assay. After treatment with 10 microg mL(-1) DEHP for 4 h, agarose gel electrophoresis and flow cytometric analysis confirmed the occurrence of apoptosis. These results indicate that DEHP isolated from Aloe vera Linne has a potent antileukaemic effect, and thus represents a new type of pharmacological activity with respect to human leukaemic cells.
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