Document Type

Journal Article

Department/Unit

School of Chinese Medicine

Title

Bruceine D induces apoptosis in human chronic myeloid leukemia K562 cells via mitochondrial pathway

Language

English

Abstract

Chronic myeloid leukemia (CML), an acquired malignant myeloproliferative disorder of hematopoietic stem cells, is one of the three most common forms of leukemia. In this study, we investigated the effects of bruceine D, which have been isolated from Brucea javanica (L.) Merr. on human chronic myeloid leukemia K562 cells. MTT assay was used to evaluate cell growth inhibition. Flow cytometry was performed to analyze mitochondrial membrane potential (ΔΨm). Western blot was applied to detect expression of cytochrome c, caspases-9, -3, PARP and other proteins. Bruceine D exhibited potent cytotoxicity to K562 cells with IC50 of 6.37 ± 0.39 μM. It led to loss of ΔΨm, release of cytochrome c, activation of caspases-9, -3 and cleavage of PARP, which suggested that bruceine D induced apoptosis of K562 cells through mitochondrial pathway. In addition, bruceine D inhibited the phosphorylation of AKT and ERK. It’s indicative that the potent anticancer activity of bruceine D be related to MAPK and PI3K pathways.

Keywords

Bruceine D, apoptosis, mitochondrial pathway, AKT, ERK, phosphorylation

Publication Date

2016

Source Publication Title

American Journal of Cancer Research

Volume

6

Issue

4

Start Page

819

End Page

826

Publisher

e-Century Publishing

Peer Reviewed

1

Funder

The work was supported by the Faculty Research Grant of Hong Kong Baptist University (FRG2/13-14/044), National Natural Science Foundation of China (No. 81473320), the Fund from Guangdong Science and Technology Department & Guangdong Academy of Traditional Chinese Medicine (2016A020226024), the Science Fund of the Education Bureau of Guangzhou City (1201410039) and Fund of Guangdong Education Department (2015KTSCX112).

ISSN (electronic)

21566976

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