Article

Matrine-induced apoptosis in leukemia U937 cells: Involvement of caspases activation and MAPK-independent pathways

Center for Molecular Biology, School of Medicine, Shantou University, Shantou, P. R. China.
Planta Medica (Impact Factor: 2.34). 06/2006; 72(6):501-6. DOI: 10.1055/s-2006-931534
Source: PubMed

ABSTRACT It is reported that matrine, one of the major effective compounds isolated from the root of Sophora flavescens Ait., has anti-leukemia activity. In this study, we find that the treatment of leukemia U937 cells with matrine results in induction of apoptosis. Analysis of the mechanism underling this apoptotic event showed activation of caspases-9, -3, and -7, and release of cytochrome C from mitochondria to cytosol, and cleavage of poly(ADP-ribose) polymerase. Matrine did not alter the level of bcl-2 and bcl-xL as well as bax. In addition, no correlation was found between matrine administration and activation of the three major MAPK subfamilies (Erk1/2, p38, JNK/SAPK). The results indicate that matrine induces apoptosis in U937 cells via a cytochrome C-triggered caspase activation pathway.

0 Followers
 · 
67 Views
  • Source
    • "Matrine, one of the main active components from the dry roots of Sophora flavescence (SF), has long been used for treatment of cancer, viral hepatitis, arrhythmia and skin diseases in China (Zhang and Huang, 2004). Some studies indicated that Matrine could induce leukemia U937, JM, K562 cells apoptosis and cell cycle arrest in vitro (Liu et al., 2006; Feng et al., 2003; Zhang et al., 2001). However, the mechanism of underlying the apoptotic process by Matrine remains to be elucidated. "
    [Show abstract] [Hide abstract]
    ABSTRACT: Matrine, one of the main active components from the dry roots of Sophora flavescence, was known to induce apoptosis in a variety of tumor cells in vitro. However, the molecular mechanism of cell apoptosis induced by Matrine remains elusive. Here, we investigated the apoptosis in Matrine-treated human gastric cancer MKN45 cells. The results showed that Matrine could inhibit cell proliferation and induce apoptosis in a dose-dependent manner. Further immunoblots revealed that in Matrine-treated cells, caspase-3, -7 were activated and the pro-apoptotic molecules Bok, Bak, Bax, Puma, and Bim were also up-regulated. Our results suggested that Matrine induced gastric cancer MKN45 cells apoptosis via increasing pro-apoptotic molecules of Bcl-2 family.
    Toxicology 02/2007; 229(3):245-52. DOI:10.1016/j.tox.2006.10.020 · 3.75 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Alpha-naphthyl isothiocyanate (ANIT) is a known hepatotoxicant that causes acute cholestatic hepatitis characterized by the infiltration of neutrophils around bile ducts and necrotic hepatocytes. The effects of glycyrrhizin (GL), 18beta-glycyrrhetinic acid (GA), matrine (MT), oxymatrine (OMT), salvianolic acid B (SAB), silymarin (SI) and dexamethasone (DEX) on ANIT-induced acute cholestasis in rats were investigated. Serological and histological data demonstrated that the administration of GL, GA or MT all protected against hepatocyte injury and cholestasis induced by ANIT. Furthermore, the bile flow and the accumulative bile excretion of ketoprofen glucuronide (KPG), that were significantly suppressed by ANIT, were preserved in rats administered GL, GA or MT. DEX protected against acute cholestasis but did not protect against hepatocyte necrosis and elevated serum alanine aminotransferase levels following ANIT administration. Rats administrated OMT, SAB or SI were not resistant to ANIT toxicity. In summary, the protective effect of DEX is directed toward cholangiocytes rather than hepatocytes whereas the natural products, GA, GL and MT, exhibit significantly better protective effects against ANIT-induced liver damage including the protection of hepatocytes as well as cholangiocytes.
    Planta Medica 03/2007; 73(2):128-33. DOI:10.1055/s-2006-957067 · 2.34 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Matrine is a major component of Sophora Flavescens and has been reported to stimulate differentiation of erythroleukemia cells. Here we show that matrine inhibits cell proliferation or induces apoptosis in a cell type-specific manner. The latter effect was investigated in more detail in the p53 deficient erythroleukemia cell line, K562. Matrine exposure induced apoptosis in a time- and dose-dependent manner in these cells. Interestingly, co-treatment with etoposide potentiated apoptosis. Further analysis of matrine-induced apoptotic changes revealed that E2F-1 and Apaf-1 were upregulated, whereas Rb was downregulated after 24 h of exposure. This was followed by Bax translocation, cytochrome c release, and caspase-9 and -3 activation. These results demonstrate that matrine triggers apoptosis of K562 cells primarily through the mitochondrial pathway and that matrine is a potential anti-tumor drug.
    European Journal of Pharmacology 04/2007; 559(2-3):98-108. DOI:10.1016/j.ejphar.2006.12.017 · 2.68 Impact Factor
Show more