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Tropical Journal of Pharmaceutical Research
Pharmacotherapy Group, Faculty of Pharmacy, University of Benin, Benin City, Nigeria
ISSN: 1596-5996
EISSN: 1596-5996
Vol. 13, No. 4, 2014, pp. 545-551
Bioline Code: pr14078
Full paper language: English
Document type: Research Article
Document available free of charge

Tropical Journal of Pharmaceutical Research, Vol. 13, No. 4, 2014, pp. 545-551

 en Cryptotanshinone Induces Apoptosis of HL-60 Cells via Mitochondrial Pathway
Ni, Wanmao; Qian, Wenbin & Tong, Xiangmin


Purpose: To test the effect of Cryptotanshinone (CPT), a natural compound isolated from the plant S. miltiorrhiza Bunge check for this species in other resources , on human leukemic cell lines (HL-60).
Methods: HL-60 cells were treated with CPT. Cell growth inhibition (%) was quantitated using MTT assay. Apoptosis detection with Annexin V-FITC/propidium iodide staining was followed by flow cytometry. Caspase-3, caspase-8, and caspase-9 colorimetric assay kit was used to determine caspase protease activity. Loss of mitochondrial membrane potential was examined by flow cytometry with JC-1 staining. Bax, PARP, p53, p21 and cytochrome C were determined using Western blot.
Results: Morphologic assessment, Annexin V-FITC/propidium iodide staining results and sub-G1 percentage indicate that the cytotoxic effect of CPT was mediated by induction of apoptosis. Furthermore, increased Bax expression, decreased Bcl-2 expression, loss of mitochondria membrane potential (MMP), release of cytochrome C, activation of caspase enzyme, cleavage of PARP and accumulation of p53 and p21 were detected during the apoptotic process. Caspase inhibitor partially abrogated CPT-induced apoptosis.
Conclusion: The results show that CPT induced apoptosis of HL-60 cell lines by mitochondria pathway, and suggest that CPT may serve as a potential therapy for leukemia.

Cryptotanshinone; Salvia miltiorrhiza Bunge; Caspase; Membrane potential; Mitochondrial; Apoptosis; Leukemia; Cytochrome C; Cell cycle

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