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  • Title: Propolis inhibits the proliferation of human leukaemia HL-60 cells by inducing apoptosis through the mitochondrial pathway.
    Author: Eom HS, Lee EJ, Yoon BS, Yoo BS.
    Journal: Nat Prod Res; 2010 Mar; 24(4):375-86. PubMed ID: 20221944.
    Abstract:
    Propolis, a natural product derived from plant resins collected by honeybees, has been reported to exert a wide spectrum of biological functions. This research aimed at investigating the effect of propolis on the proliferation of human leukaemia HL-60 cells and whether propolis might induce apoptosis in HL-60 cells. The results showed dose- and time-dependent decreases in the proliferation of HL-60 cells treated with propolis (above 3 microg mL(-1) of propolis). Further studies revealed that the anti-proliferative effects of propolis were caused by inducing apoptosis. Agarose electrophoresis of genomic DNA of HL-60 cells treated with propolis showed the ladder pattern typical for apoptotic cells. Propolis induced the activation of caspase-3 and cleavage of poly (ADP-ribose) polymerase in HL-60 cells. Propolis also induced the release of cytochrome c from mitochondria to cytosol. Taken together, these findings demonstrate that the inhibitory effect of propolis on HL-60 cell proliferation is caused by inducing apoptosis through the mitochondrial pathway.
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