Wang Y, Chen Y, Chen Z, Ke WJ, Wu QL, He J. [Mechanism of gambogic acid-induced apoptosis in Raji cells].
Zhongguo Shi Yan Xue Ye Xue Za Zhi 2009;
17:88-91. [PMID:
19236754]
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Abstract
This study was purposed to explore the apoptotic effect of gambogic acid on Raji cells and the role of death inducer-obliterator 1 (DIO-1) in this process. Annexin V-fluorescein-isothiocyanate/propidium iodide was used to detect apoptosis of Raji cells. Western blot was used to determine the expressions of DIO-1, Bcl-xL, pro-caspase 3 and 2 activated subunits: P17 and P20. The subcellular localization of DIO-1 in untreated and treated Raji cells was checked by immunofluorescence and Hoechst 33258 double staining. The results showed that the Gambogic acid dose-dependently induced the apoptosis of Raji cells, downregulated the expression of Bcl-xL, upregulated the expressions of DIO-1 and pro-caspase 3, induced the cleavage of pro-caspase 3 and DIO nuclear translocation. It is concluded that gambogic acid induces the apoptosis of Raji cells through DIO-1 upregulation, nuclear translocation, Bcl-xL downregulation and caspase 3 activation.
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