title: Pyrogallol inhibits the growth of lung cancer Calu-6 cells via caspase-dependent apoptosis.
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.
authors.affiliation: Department of Physiology, Medical School, Centers for Healthcare Technology Development, Institute for Medical Sciences, Chonbuk National University, san 2-20 Geumam-dong, Deokjin-gu, JeonJu 561-180, Republic of Korea.
authors.forename: Yong Hwan
authors.initials: YH
authors.lastname: Han
authors.forename: Sung Zoo
authors.initials: SZ
authors.lastname: Kim
authors.forename: Suhn Hee
authors.initials: SH
authors.lastname: Kim
authors.forename: Woo Hyun
authors.initials: WH
authors.lastname: Park
mesh_terms: D000230:Adenocarcinoma / Q000201:enzymology / Q000473:pathology*; D000970:Antineoplastic Agents / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects*; D053148:Caspase 3 / Q000378:metabolism; D053181:Caspase 8 / Q000378:metabolism; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D045304:Cytochromes c / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D004354:Drug Screening Assays, Antitumor; D016193:G1 Phase / Q000187:drug effects; D006801:Humans; D008175:Lung Neoplasms / Q000201:enzymology / Q000473:pathology*; D053078:Membrane Potential, Mitochondrial / Q000187:drug effects; D008856:Microscopy, Fluorescence; D008928:Mitochondria / Q000187:drug effects / Q000201:enzymology / Q000502:physiology; D009842:Oligopeptides / Q000494:pharmacology; D011748:Pyrogallol / Q000494:pharmacology*
chemical_list: D000970:Antineoplastic Agents; D009842:Oligopeptides; C517629:benzyloxycarbonyl-valyl-alanyl-aspartic acid; D011748:Pyrogallol; D045304:Cytochromes c; D053148:Caspase 3; D053181:Caspase 8