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GdCl^sub 3^ Induced Hep G2 Cell Death through Mitochondrial and External Death Pathways without Significant Elevation of ROS Generation
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GdCl^sub 3^ Induced Hep G2 Cell Death through Mitochondrial and External Death Pathways without Significant Elevation of ROS Generation
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Journal Article
GdCl^sub 3^ Induced Hep G2 Cell Death through Mitochondrial and External Death Pathways without Significant Elevation of ROS Generation
2013
Overview
Gadolinium (Gd) compounds have important applications as MRI contrast and potential anticancer agents. The present study investigated the mechanisms of the proapoptotic effect of gadolinium chloride (GdCl^sub 3^) on hepatoblastoma cell line (Hep G2) tumor cells. The experimental results indicated that GdCl^sub 3^ induced apoptosis of Hep G2 at high concentration and with long time incubation; however, unlike the actions on normal cell lines, GdCl^sub 3^ did not cause any oxidative stress on tumor cells. Cytochrome c (Cyt c) and apoptosis inducing factor release, Bax translocation, collapse of mitochondria membrane potential, caspase 3 and 8 activation, and Bid cleavage were observed along with a sustained activation of extracellular signal-regulated kinase (ERK) and c-Jun NH2 terminal kinase (JNK). Addition of ERK and JNK inhibitor attenuated the effect of GdCl^sub 3^ induced apoptosis and Cyt c release. All the results suggested a novel mechanism that GdCl^sub 3^ induced Hep G2 cell death through intrinsic and external death pathways without significant elevation of reactive oxygen species generation. The present work provided new insight to understand the mechanisms of the biological effects of GdCl^sub 3^ and implications for the development of anticancer Gd agents.[PUBLICATION ABSTRACT]
Publisher
Springer Nature B.V
Subject
