Cytotoxicity of homoharringtonine on leukemic stem-like cells in AML cell line KG-1 / 浙江大学学报·医学版
Journal of Zhejiang University. Medical sciences
;
(6): 485-490, 2012.
Article
Dans Chinois
| WPRIM
| ID: wpr-336763
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the effect of homoharringtonine (HHT) on leukemic stem-like cells (LSC) in human acute myeloid leukemia (AML) cell lines.</p><p><b>METHODS</b>The phenotypes of AML cell lines U937,Kasumi-1,and KG-1 cells were analyzed by flow cytometry (FACS). The effect of HHT on leukemia stem-like cells with immunophenotype of CD34(+)CD38(-)CD96(+) was detected with FACS. Cell growth was measured by MTT assay. Activation of Caspase pathway and expression of apoptosis-related regulator proteins were examined by Western blotting.</p><p><b>RESULTS</b>FACS demonstrated that the 69% of KG-1 cells expressed LSC phenotype CD34(+)CD38(-)CD96(+), while 26.7% on Kasumi-1 cells expressed this marker. In contrast,U937 cells showed CD96 negative. HHT significantly inhibited cell growth of KG-1 cells with an IC(50) of 16.9 ng/ml at 48 h. The ratio of CD34(+)CD38(-)CD96(+) cells decreased from 63.6% to 17.1% after HHT treatment. Enhanced apoptosis was demonstrated in HHT group evidenced by strong activation of Caspase-9,Caspase-3 and PARP.HHT treatment resulted in down-regulation of expression of anti-apoptotic protein BCL-2 and phosphorylated-Akt.</p><p><b>CONCLUSION</b>HHT can effectively kill the leukemic stem-like cells in human AML cell line KG1 by inhibiting cell growth and inducing apoptosis which is associated with activation of Caspase pathway and down-regulation of anti-apoptotic proteins and phosphorylated-Akt.</p>
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Anatomopathologie
/
Pharmacologie
/
Cellules souches tumorales
/
Leucémie aigüe myéloïde
/
Régulation de l'expression des gènes tumoraux
/
Apoptose
/
Lignée cellulaire tumorale
/
Prolifération cellulaire
/
Caspase-3
/
Caspase-9
Limites du sujet:
Humains
langue:
Chinois
Texte intégral:
Journal of Zhejiang University. Medical sciences
Année:
2012
Type:
Article
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