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A Lentinus edodes polysaccharide induces mitochondrial-mediated apoptosis in human cervical carcinoma HeLa cells.
International Journal of Biological Macromolecules 2017 October
In this study, a homogeneous polysaccharide (LEP1) with an average molecular weight of 53kDa was successfully purified from the fruiting bodies of Lentinus edodes and its anticancer efficacy on human cervical carcinoma HeLa cells in vitro and associated possible molecular mechanism were also evaluated. MTT assay showed that LEP1 exhibited a dose-dependent inhibitory effect on the proliferation of HeLa cells and caused apoptotic death. Our present findings provided the first evidence that LEP1 induced the apoptosis of HeLa cells via a mitochondria dependent pathway, as indicated by an increase in Bax/Bcl-2 ratio, a loss of mitochondrial membrane potential (Δym), the release of cytochrome c from the mitochondria to the cytosol, activation of caspase-9 and caspase-3, and cleavage of poly (ADP-ribose) polymerase (PARP) in HeLa cells. These combined results unequivocally indicated that the involvement of mitochondria-mediated signaling pathway in LEP1-induced apoptosis and strongly provided experimental evidence for the use of LEP1 as a potential therapeutic agent in the prevention and treatment of human cervical carcinoma.
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