PMID- 15949805 OWN - NLM STAT- MEDLINE DCOM- 20050808 LR - 20061115 IS - 0014-5793 (Print) IS - 0014-5793 (Linking) VI - 579 IP - 16 DP - 2005 Jun 20 TI - Grifolin, a potential antitumor natural product from the mushroom Albatrellus confluens, inhibits tumor cell growth by inducing apoptosis in vitro. PG - 3437-43 AB - Grifolin is a natural biologically active substance isolated from the fresh fruiting bodies of the mushroom Albatrellus confluens. Here, for the first time, we describe a novel activity of grifolin, namely its ability to inhibit the growth of tumor cells by the induction of apoptosis. Grifolin strongly inhibited the growth of tumor cell lines: CNE1, HeLa, MCF7, SW480, K562, Raji and B95-8. Analysis of acridine orange (AO)/ethidium bromide (EB) staining and flow cytometry showed that grifolin possessed apoptosis induction activity to CNE1, HeLa, MCF7 and SW480. Furthermore, the cytochrome c release from mitochondria was detected by confocal microscopy in CNE1 cells after a 12h treatment with grifolin. The increase of caspase-8, 9, 3 activities revealed that caspase was a key mediator of the apoptotic pathway induced by grifolin, and the underexpression of Bcl-2 and up-regulation of Bax resulted in the increase of Bax: Bcl-2 ratio, suggesting that Bcl-2 family involved in the control of apoptosis. Owing to the combination of the significant antitumor activity by inducing apoptosis and natural abundance of the compound, grifolin holds the promise of being an interesting antitumor agent that deserves further laboratory and in vivo exploration. FAU - Ye, Mao AU - Ye M AD - Cancer Research Institute, Xiangya School of Medicine, Central South University, Changsha, Hunan 410078, PR China. FAU - Liu, Ji-Kai AU - Liu JK FAU - Lu, Zhong-Xin AU - Lu ZX FAU - Zhao, Yan AU - Zhao Y FAU - Liu, Su-Fang AU - Liu SF FAU - Li, Li-Li AU - Li LL FAU - Tan, Ming AU - Tan M FAU - Weng, Xin-Xian AU - Weng XX FAU - Li, Wei AU - Li W FAU - Cao, Ya AU - Cao Y LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - FEBS Lett JT - FEBS letters JID - 0155157 RN - 0 (Antineoplastic Agents) RN - 0 (BAX protein, human) RN - 0 (Bax protein, mouse) RN - 0 (Proto-Oncogene Proteins c-bcl-2) RN - 0 (Terpenes) RN - 0 (bcl-2-Associated X Protein) RN - 6379-55-1 (grifolin) RN - 9007-43-6 (Cytochromes c) RN - EC 3.4.22.- (Caspases) SB - IM MH - Animals MH - Antineoplastic Agents/*pharmacology MH - *Apoptosis MH - Basidiomycota/chemistry MH - Caspases/metabolism MH - Cell Line, Tumor MH - Cell Proliferation/drug effects MH - Cytochromes c/metabolism MH - Down-Regulation MH - Humans MH - Mice MH - Neoplasms/pathology MH - Proto-Oncogene Proteins c-bcl-2/metabolism MH - Terpenes/*pharmacology MH - Up-Regulation MH - bcl-2-Associated X Protein EDAT- 2005/06/14 09:00 MHDA- 2005/08/09 09:00 CRDT- 2005/06/14 09:00 PHST- 2005/04/25 00:00 [received] PHST- 2005/05/03 00:00 [accepted] PHST- 2005/06/14 09:00 [pubmed] PHST- 2005/08/09 09:00 [medline] PHST- 2005/06/14 09:00 [entrez] AID - S0014-5793(05)00611-3 [pii] AID - 10.1016/j.febslet.2005.05.013 [doi] PST - ppublish SO - FEBS Lett. 2005 Jun 20;579(16):3437-43. doi: 10.1016/j.febslet.2005.05.013.