Mechanism of arsenic trioxide-induced apoptosis in hepatic blastoma cells HepG2 / 中华肿瘤杂志
Chinese Journal of Oncology
;
(12): 120-123, 2003.
Article
Dans Chinois
| WPRIM
| ID: wpr-347480
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the mechanism of arsenic trioxide (As(2)O(3)) induced apoptosis in hepatic blastoma cells HepG2 and its effects on cell nuclear matrix related protein promyelocytic leukaemia (PML).</p><p><b>METHODS</b>HepG2 cells were cultured in MEM medium and treated with different concentrations of As(2)O(3) for either 24 h or 96 h. In situ terminal deoxynucleotidyl transferase (TdT) labeling (TUNEL) and DNA ladder were applied to detect apoptosis. Confocal microscopy and western blot were performed to observe the expression of PML.</p><p><b>RESULTS</b>TUNEL positive apoptotic cells and DNA ladder could be detected in As(2)O(3) treated groups. The expression of PML decreased in HepG2 cells with 2 micro mol/L As(2)O(3), and micropunctates characteristic of PML protein in HepG2 cell nuclei almost disappeared after the treatment of 5 micro mol/L As(2)O(3).</p><p><b>CONCLUSION</b>As(2)O(3) induces HepG2 tumor cell apoptosis in a time- and concentration-dependent manner. As(2)O(3) may degradate the PML protein in HepG2 cell nuclei. The decreased expression of PML is closely correlated with apoptosis. Nuclear matrix associated protein PML could be the target of As(2)O(3) therapy.</p>
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Oxydes
/
Anatomopathologie
/
Pharmacologie
/
Composés de l'arsenic
/
Facteurs de transcription
/
Protéines nucléaires
/
Chimie
/
Apoptose
/
Hépatoblastome
/
Protéines suppresseurs de tumeurs
Limites du sujet:
Humains
langue:
Chinois
Texte intégral:
Chinese Journal of Oncology
Année:
2003
Type:
Article
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