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Tanshinone IIA inhibits leukemia THP-1 cell growth by induction of apoptosis
- Source :
- Oncology Reports. 21
- Publication Year :
- 2009
- Publisher :
- Spandidos Publications, 2009.
-
Abstract
- Tanshinone IIA, a diterpene quinone extracted from the traditional herbal medicine, Salvia miltiorrhiza Bunge, has been reported to have anti-tumor effects on a large variety of cancer cells. The present study was undertaken to investigate the in vitro antiproliferation and apoptosis inducing effects of Tanshinone IIA on leukemia THP-1 cell lines and its mechanisms of action. MTT assay was used to detect the cell growth inhibitory rate; cell apoptotic rate and the mitochondrial membrane potential (Deltapsim) were investigated by flow cytometry (FCM), apoptotic morphology was observed by Hoechst 33258 staining and DNA fragmentation analysis. The expression of caspase-3 and different apoptosis modulators were analyzed by Western blotting. The results revealed that Tanshinone IIA inhibited the growth of THP-1 cells and caused significant apoptosis, the suppression was both in time- and dose-dependent manner. After treatment by Tanshinone IIA for 48 h, the percentage of disruption of Deltapsim gradually increased in a dose-dependent manner along with marked changes of cell apoptosis. Western blotting showed cleavage of the caspase-3 zymogen protein (32-kDa) with the appearance of its 20-kDa subunit and a dose-dependent cleavage of PARP, with the appearance of 89-kDa fragment; The expression of Bcl-2 and survivin was down-regulated remarkably while Bax expression was up-regulated concurrently after the cells were treated with Tanshinone IIA for 48 h. We therefore conclude that Tanshinone IIA has significant growth inhibition effects on THP-1 cells by induction of apoptosis, and that Tanshinone IIA-induced apoptosis on THP-1 cells is mainly related to the disruption of Deltapsim and activation of caspase-3 as well as down-regulation of anti-apoptotic protein Bcl-2, survivin and up-regulation of pro-apoptotic protein Bax. The results indicate that Tanshinone IIA may serve as a potential anti-leukemia reagent.
- Subjects :
- Cancer Research
Programmed cell death
Survivin
Apoptosis
DNA Fragmentation
Biology
Salvia miltiorrhiza
Inhibitor of Apoptosis Proteins
Cell Line, Tumor
Humans
MTT assay
Cell Proliferation
Membrane Potential, Mitochondrial
Leukemia
Caspase 3
Cell growth
General Medicine
Phenanthrenes
Antineoplastic Agents, Phytogenic
Molecular biology
Proto-Oncogene Proteins c-bcl-2
Oncology
Abietanes
Cancer cell
DNA fragmentation
Microtubule-Associated Proteins
Subjects
Details
- ISSN :
- 1021335X
- Volume :
- 21
- Database :
- OpenAIRE
- Journal :
- Oncology Reports
- Accession number :
- edsair.doi.dedup.....65a41b1e551dc10a7c300f5bef63ed65