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  • Title: Pyrogallol inhibits the growth of lung cancer Calu-6 cells via caspase-dependent apoptosis.
    Author: Han YH, Kim SZ, Kim SH, Park WH.
    Journal: Chem Biol Interact; 2009 Jan 27; 177(2):107-14. PubMed ID: 19000662.
    Abstract:
    Pyrogallol (PG) is a polyphenol compound and a known O2- generator. We evaluated the effects of PG on the growth and apoptosis of human pulmonary adenocarcinoma Calu-6 cells. PG decreased the viability of Calu-6 cells in a dose- and time-dependent manner. The induction of apoptosis by PG was accompanied by the loss of mitochondrial membrane potential (DeltaPsi(m)), cytochrome c release from mitochondria and activation of caspase-3 and caspase-8. All tested caspase inhibitors, especially the pan-caspase inhibitor (Z-VAD), markedly rescued Calu-6 cells from PG-induced cell death. Rescue was accompanied by inhibition of caspase-3 activation and PARP cleavage. Treatment with Z-VAD also prevented the loss of mitochondrial membrane potential (DeltaPsi(m)). In conclusion, PG inhibits the growth of Calu-6 cells via caspase-dependent apoptosis.
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