Norcantharidin-induced Apoptosis of AGS Human Gastric Cancer Cells Through Reactive Oxygen Species Production, and Caspase- and Mitochondria-dependent Signaling Pathways.

Abstract:

:Norcantharidin (NCTD) was purified from mylabris, the dried body of the Chinese blister beetle. NCTD has been shown to exhibit anticancer activities in many human cancer cell lines, but there are no reports to show whether it induces apoptosis of human gastric cancer cells. Therefore, in the present study, we investigated NCTD-induced cell death and associated protein expression in human gastric cancer AGS cells in vitro. Cell morphological changes, viability and cell-cycle distribution were examined and analyzed by phase-contrast microscopy and flow cytometric assays. Flow cytometry was also used to measure the levels of reactive oxygen species (ROS), Ca2+, mitochondrial membrane potential (Ψm) and activity of caspases. The results indicated that NCTD induced cell morphological changes, reduced total viable cell number and induced G0/G1 phase arrest. NCTD also increased ROS production and reduced the Ψm and increased caspase-9 activity in AGS cells. Western blotting also found that NCTD increased the pro-apoptotic proteins such as BCL2-associated X protein (BAX) and BH3 interacting-domain death agonist (BID) and increased the release of cytochrome c, apoptosis inducing factor (AIF) and endonuclease G (Endo G) release from mitochondria in AGS cells. NCTD also significantly increased the expression of active forms of caspase-3 and -8 and -9 and reduced the expression of caspase-4 and -12 in AGS cells. Based on these observations, we suggest that NCTD-induced apoptotic cell death may be through mitochondria- and caspase-dependent pathways.

journal_name

Anticancer Res

journal_title

Anticancer research

authors

Zheng LC,Yang MD,Kuo CL,Lin CH,Fan MJ,Chou YC,Lu HF,Huang WW,Peng SF,Chung JG

doi

10.21873/anticanres.11192

subject

Has Abstract

pub_date

2016-11-01 00:00:00

pages

6031-6042

issue

11

eissn

0250-7005

issn

1791-7530

pii

36/11/6031

journal_volume

36

pub_type

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