Effects of dexamethasone on arsenic trioxide induced apoptosis, NF-kappaB activation and gene expression in lymphoma cell line / 中华血液学杂志
Chinese Journal of Hematology
;
(12): 227-231, 2005.
Article
in Chinese
| WPRIM
| ID: wpr-255901
ABSTRACT
<p><b>OBJECTIVES</b>To study the effect of dexamethasone (Dex) on the apoptosis and NF-kappaB activation in Raji cells as well as expression of MMP9 and VEGF induced by As2O3, and to observe the effect of inhibited activity of NF-kappaB by Dex on apoptosis.</p><p><b>METHODS</b>Cell apoptosis was analysed by Annexin V. Fluctuation of NF-kappaB, MMP9 and VEGF was detected by semi-quantitative immunohistochemistry.</p><p><b>RESULTS</b>The apoptosis and activation of NF-kappaB of Raji cells could be induced by As2O3. The percentage of apoptosis was (39.2 +/- 1.3)%. Dex significantly increased (77.5%) the apoptosis induced by As2O3 (P < 0.05). Dex suppressed the activation of NF-kappaB induced by As2O3 (a suppression rate of 28.0%, P < 0.05). There was a positive correlation between the changes of MMP9, VEGF and NF-kappaB.</p><p><b>CONCLUSIONS</b>As2O3 could induce apoptosis, activate NF-kappaB and up-regulate expression of MMP9 and VEGF of Raji cells. The mechanism of enhanced apoptosis by Dex may be related to suppressing activation of NF-kappaB and down-regulating expression of MMP9 and VEGF.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Oxides
/
Pathology
/
Pharmacology
/
Arsenicals
/
Dexamethasone
/
Immunohistochemistry
/
Lymphoma, B-Cell
/
NF-kappa B
/
Apoptosis
/
Matrix Metalloproteinase 9
Limits:
Humans
Language:
Chinese
Journal:
Chinese Journal of Hematology
Year:
2005
Type:
Article
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