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作者

Zhu, L.-Z. Hou, Y.-J. Zhao, M. Yang, M.-F. Fu, X.-T. Sun, J.-Y. Fu, X.-Y. Shao, L.-R. Zhang, H.-F. Fan, C.-D. Gao, H.-L. Sun, B.-L.

作者单位

Key Lab of Cerebral Microcirculation in Universities of Shandong, Taishan Medical University, Taian, Shandong, China School of Pharmacy, Taishan Medical University, Taian, Shandong, China a Affiliated Hospital of Taishan Medical University, Taian, Shandong, China Departments of Orthopaedics, Taian Central Hospital, Taian, Shandong, China

刊名

Cell Biology and Toxicology

年份

2016

卷号

Vol.32 No.4

页码

333-345

ISSN

0742-2091

关键词

Apoptosis Bcl-2 family Caspase Caudatin Glioma Reactive oxygen species

分类号

571.95

摘要

Caudatin as one species of C-21 steroidal from Cynanchum bungei decne displays potential anticancer activity. However, the underlying mechanisms remain elusive. In the present study, the growth suppressive effect and mechanism of caudatin on human glioma U251 and U87 cells were evaluated in vitro. The results indicated that caudatin significantly inhibited U251 and U87 cell growth in both a time- and dose-dependent manner. Flow cytometry analysis revealed that caudatin-induced cell growth inhibi...更多

Caudatin as one species of C-21 steroidal from Cynanchum bungei decne displays potential anticancer activity. However, the underlying mechanisms remain elusive. In the present study, the growth suppressive effect and mechanism of caudatin on human glioma U251 and U87 cells were evaluated in vitro. The results indicated that caudatin significantly inhibited U251 and U87 cell growth in both a time- and dose-dependent manner. Flow cytometry analysis revealed that caudatin-induced cell growth inhibition was achieved by induction of cell apoptosis, as convinced by the increase of Sub-G1 peak, PARP cleavage and activation of caspase-3, caspase-7 and caspase-9. Caudatin treatment also resulted in mitochondrial dysfunction which correlated with an imbalance of Bcl-2 family members. Further investigation revealed that caudatin triggered U251 cell apoptosis by inducing reactive oxygen species generation through disturbing the redox homeostasis. Moreover, pretreatment of caspase inhibitors apparently weakens caudatin-induced cell killing, PARP cleavage and caspase activation and eventually reverses caudatin-mediated apoptosis. Importantly, caudatin significantly inhibited U251 tumour xenografts in vivo through induction of cell apoptosis involving the inhibition of cell proliferation and angiogenesis, which further validate its value in combating human glioma in vivo. Taken together, the results described above all suggest that caudatin inhibited human glioma cell growth by induction of caspase-dependent apoptosis with involvement of mitochondrial dysfunction and ROS generation.收起

学科

【SCI学科】CELL BIOLOGY;TOXICOLOGY 【ESI学科】MOLECULAR BIOLOGY & GENETICS

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