Influence of As(2)O(3) on proteasome beta(1)-subunit in NB4 cells / 中国实验血液学杂志
Journal of Experimental Hematology
;
(6): 579-582, 2009.
Article
in Chinese
| WPRIM
| ID: wpr-334066
ABSTRACT
This study was aimed to explore the correlation between effects of arsenic trioxide on NB4 cell differentiation and the change of beta(1)-subunit of 26S proteasome. NB4 cell in 0.5 micromol/L As(2)O(3) was incubated for 24 hours and 48 hours, then total protein was extracted, expressions of subunit beta(1) and PML-RARalpha fusion protein were determined by Western blot. The results indicated that the expression of 26S proteasome beta(1)-subunit increased after incubation with As(2)O(3) for 24 hours, but after culture with As(2)O(3) for 48 hours, the expression of beta-subunit decreased to the baseline. Meanwhile, the expression of PML-RARalpha fusion protein obviously decreased after 24 hours, and kept low level at 48 hours. It is concluded that the expression of 26S proteasome beta(1)-subunit increases after exposure to As(2)O(3). Increment of 26S proteasome beta(1)-subunit may be associated with the degradation of PML-RARalpha fusion protein and plays roles in the differentiation and apoptosis of NB4 cells.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Oxides
/
Pharmacology
/
Arsenicals
/
Tumor Cells, Cultured
/
Leukemia, Promyelocytic, Acute
/
Oncogene Proteins, Fusion
/
Cell Differentiation
/
Apoptosis
/
Proteasome Endopeptidase Complex
/
Metabolism
Limits:
Humans
Language:
Chinese
Journal:
Journal of Experimental Hematology
Year:
2009
Type:
Article
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