Berbamine induces apoptosis in human hepatoma cell line SMMC7721 by loss in mitochondrial transmembrane potential and caspase activation.
- Author:
Guan-yu WANG
1
;
Jia-wei ZHANG
;
Qing-hua LÜ
;
Rong-zhen XU
;
Qing-hua DONG
Author Information
- Publication Type:Journal Article
- MeSH: Alkaloids; pharmacology; Apoptosis; drug effects; Benzylisoquinolines; pharmacology; Carcinoma, Hepatocellular; metabolism; pathology; Caspase 3; metabolism; Caspase 9; metabolism; Cell Line, Tumor; Enzyme Activation; drug effects; Humans; Liver Neoplasms; metabolism; pathology; Medicine, Chinese Traditional; Membrane Potentials; drug effects; Mitochondria, Liver; drug effects; metabolism; ultrastructure
- From: Journal of Zhejiang University. Science. B 2007;8(4):248-255
- CountryChina
- Language:English
-
Abstract:
OBJECTIVETo investigate the effect of berbamine on human hepatoma cell line SMMC7721.
METHODSThe effects of 24 h and 48 h incubation with different concentrations (0 to approximately 64 microg/ml) of the berbamine on SMMC7721 cells were evaluated using 3-4,5-dimethylthiazol-2-yl-2,5-diphenyltetrazolium bromide (MTT) assay. Hoechst 33258 staining was conducted to distinguish the apoptotic cell, and the appearance of sub-G1 stage was determined by PI (propidium iodide) staining, the percentage of apoptotic cell was determined by flow cytometry following annexin V/PI staining. Flow cytometry was performed to analyze the cell cycle distribution and the mitochondrial membrane potential (psi(m)); the expression of activated caspase3 and caspase9 was analyzed by Western-blot.
RESULTSThe proliferation of SMMC7721 was decreased after treatment with berbamine in a dose- and time-dependent manner. Berbamine could induce apoptosis in SMMC7721 cells and could cause cell cycle arrest in G0/G1 phase, to induce loss of mitochondrial membrane potential (psi(m)) and activate caspase3 and caspase9. Berbamine-induced apoptosis could be blocked by the broad caspase inhibitor z-VAD-fmk.
CONCLUSIONBerbamine exerts antiproliferative effects on human hepatocellular carcinoma SMMC7721 cells. The anticancer activity of berbamine could be attributed partly to its inhibition of cell proliferation and induction of apoptosis in cancer cells through loss in mitochondrial transmembrane potential and caspase activation.
