title: Blazeispirol A from Agaricus blazei fermentation product induces cell death in human hepatoma Hep 3B cells through caspase-dependent and caspase-independent pathways.
abstract: Currently, liver cancer is a leading cause of cancer-related death in the world. Hepatocellular carcinoma is the most common type of liver cancer. Previously, it was reported that blazeispirol A (BA) is the most active antihepatoma compound in an ethanolic extract of Agaricus blazei fermentation product. The aim of this study was to understand the antihepatoma mechanism of BA in human liver cancer Hep 3B cells. The results showed that BA inhibited the growth of Hep 3B cells and increased the percentage of cells in sub-G1 phase in a concentration- and time-dependent manner. In addition, BA treatment resulted in DNA fragmentation, caspase-9 and caspase-3 activations, poly(ADP-ribose)polymerase (PARP) degradation, down-regulation of Bcl-2 and Bcl-xL expressions, up-regulation of Bax expression, and disruption of the mitochondrial membrane potential (MMP) in Hep 3B cells. Furthermore, z-VAD-fmk, a caspase inhibitor, did not enhance the viability of BA-treated Hep 3B cells, and BA induced the release of HtrA2/Omi and apoptosis-inducing factor (AIF) from mitochondria into the cytosol. These findings suggested that BA with novel chemopreventive and chemotherapeutic potentials causes both caspase-dependent and caspase-independent cell death in Hep 3B cells.
authors.affiliation: Graduate Institute of Food Science and Technology, National Taiwan University, Taipei, Taiwan, Republic of China.
authors.forename: Zheng-Yuan
authors.initials: ZY
authors.lastname: Su
authors.forename: Yen-Chen
authors.initials: YC
authors.lastname: Tung
authors.forename: Lucy Sun
authors.initials: LS
authors.lastname: Hwang
authors.forename: Lee-Yan
authors.initials: LY
authors.lastname: Sheen
mesh_terms: D000364:Agaricus / Q000737:chemistry / Q000378:metabolism*; D000970:Antineoplastic Agents / Q000378:metabolism / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects*; D001685:Biological Factors / Q000378:metabolism / Q000494:pharmacology*; D006528:Carcinoma, Hepatocellular / Q000188:drug therapy / Q000201:enzymology* / Q000235:genetics / Q000503:physiopathology; D061945:Caspase Inhibitors; D020169:Caspases / Q000235:genetics / Q000378:metabolism*; D002453:Cell Cycle / Q000187:drug effects; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D005285:Fermentation; D006801:Humans; D008113:Liver Neoplasms / Q000188:drug therapy / Q000201:enzymology* / Q000235:genetics / Q000503:physiopathology
chemical_list: D000970:Antineoplastic Agents; D001685:Biological Factors; D061945:Caspase Inhibitors; D020169:Caspases