[Celastrol down-regulates expression of P-Akt and cyclin D1 in HL-60 cells and induces apoptosis].
Zhongguo Shi Yan Xue Ye Xue Za Zhi
; 18(4): 898-902, 2010 Aug.
Article
em Zh
| MEDLINE
| ID: mdl-20723296
ABSTRACT
The aim of this study was to investigate the effect of Celastrol on induction of HL-60 cell apoptosis and its possible mechanism. The proliferative activity of HL-60 cells treated with 0.25 - 8.0 µmol/L of Celastrol for 24 - 72 hours was assayed by MTT method, the effects of Celastrol on apoptosis and cell cycle of HL-60 were detected by TUNEL staining and flow cytometry with Annexin V-FITC/PI double labeling, the expression of pAkt and cyclin D1 at protein and gene level in HL-60 cells treated with Celastrol were measured by Western blot and RT-PCR. The results showed that the Celastrol could obviously inhibit the proliferation of HL-60 cells in concentration-and time-dependent manners, the IC50 value of Celastrol for 24 hours was 6.21 ± 0.242 µmol/L. The Celastrol concentration-dependently induced the apoptosis of HL-60 cells, accompanying with morphological changes of apoptotic cells, which may be related with arrest of cells in G0/G1 phase. The Celastrol suppressed the expression of pAkt and Cyclin D1 in HL-60 cells to a varying degree which showed obvious concentration-and time-dependent manners. It is concluded that the Celastrol inhibits the proliferation and induced the apoptosis of HL-60 cells. Its mechanism may be related with down-regulation of p-Act and cyclin D1 expressions.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Triterpenos
/
Apoptose
/
Ciclina D1
/
Proteínas Proto-Oncogênicas c-akt
Limite:
Humans
Idioma:
Zh
Revista:
Zhongguo Shi Yan Xue Ye Xue Za Zhi
Assunto da revista:
HEMATOLOGIA
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
China