Effects of Clostridium difficile toxin a on proliferation of K562 cells / 中国实验血液学杂志
Journal of Experimental Hematology
;
(6): 894-897, 2011.
Article
in Chinese
| WPRIM
| ID: wpr-313870
ABSTRACT
This study was aimed to investigate the effect of clostridium difficile toxin A (Tcd A) on proliferation of K562 cells and its mechanism. The proliferative activity of K562 cells exposed to Tcd A was tested by MTT assay; cell cycle distribution and mitochondrial membrane potential were analyzed by flow cytometry; the protein expression of cytochrome C and DNA fragmentation were observed by immunohistochemistry staining and agarose gel electrophoresis respectively. The results indicated that Tcd A inhibited proliferation of K562 cells in a time-and concentration-dependent manner. Cells were arrested at G(0)/G(1) phase. Peak of apoptosis appeared. The protein expression of cytochrome C increased as compared with control group (p < 0.05). Agarose gel electrophoresis of DNA from K562 treated with Tcd A revealed a "ladder" pattern. It is concluded that clostridium difficile toxin A can inhibit proliferation and induce apoptosis of K562 cells. The mechanism may be in relation to decrease of mitochondrial membrane potential and the release of cytochrome C from mitochondria matrix.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pharmacology
/
Bacterial Toxins
/
Apoptosis
/
K562 Cells
/
Cell Proliferation
/
Enterotoxins
Limits:
Humans
Language:
Chinese
Journal:
Journal of Experimental Hematology
Year:
2011
Type:
Article
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