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Cucurbitacin e induces caspase-dependent apoptosis and protective autophagy mediated by ROS in lung cancer cells
Guixin Ma1; Weiwei Luo1; Jinjian Lu1; Dik-Lung Ma2; Chung-Hang Leung1; Yitao Wang1; Xiuping Chen1
2016
Source PublicationChemico-Biological Interactions
ISSN0009-2797
Volume253Pages:1
Abstract

Cucurbitacin E (CuE) is a triterpenoid with potent anticancer activities while the underlying mechanisms remain elusive. In the present study, the anticancer effects of CuE on 95D lung cancer cells were investigated. CuE decreased cell viability, inhibited colony formation, and increased reactive oxygen species (ROS) in a concentration-dependent manner, which were reversed by N-acetyl-l-cysteine (NAC). CuE induced apoptosis as determined by JC-1 staining, expression of Bcl-2 family proteins, cleavage of caspases, and TUNEL staining. NAC and Ac-DEVD-CHO partially reversed CuE-induced cleavage of caspase-3, caspase-7, and PARP. Furthermore, CuE caused accumulation of autophagic vacuoles and concentration- and time-dependent expression of LC3II protein. Autophagy inhibitors chloroquine and bafilomycin A1 enhanced CuE-induced LC3II expression and cell death. CuE-triggered protein expression of p-AKT, p-mTOR, Beclin-1, and p-ULK1 was partially reversed by NAC pretreatment. In addition, CuE treatment damaged F-actin without affecting β-tubulin as confirmed by immunofluorescence. In conclusion, CuE induced ROS-dependent apoptosis through Bcl-2 family and caspases in 95D lung cancer cells. Furthermore, CuE induced protective autophagy mediated by ROS through AKT/mTOR pathway. This study provides novel roles of ROS in the anticancer effect of CuE. 

KeywordApoptosis Autophagy Cell Death Cucurbitacin Ros Chinese Medicine
DOI10.1016/j.cbi.2016.04.028
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaBiochemistry & Molecular Biology ; Pharmacology & Pharmacy ; Toxicology
WOS SubjectBiochemistry & Molecular Biology ; Pharmacology & Pharmacy ; Toxicology
WOS IDWOS:000377372800001
The Source to ArticleScopus
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Cited Times [WOS]:36   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF PHARMACEUTICAL SCIENCES
Institute of Chinese Medical Sciences
THE STATE KEY LABORATORY OF QUALITY RESEARCH IN CHINESE MEDICINE (UNIVERSITY OF MACAU)
Corresponding AuthorXiuping Chen
Affiliation1.State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, Macau, China
2.Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong
First Author AffilicationInstitute of Chinese Medical Sciences
Corresponding Author AffilicationInstitute of Chinese Medical Sciences
Recommended Citation
GB/T 7714
Guixin Ma,Weiwei Luo,Jinjian Lu,et al. Cucurbitacin e induces caspase-dependent apoptosis and protective autophagy mediated by ROS in lung cancer cells[J]. Chemico-Biological Interactions,2016,253:1.
APA Guixin Ma,Weiwei Luo,Jinjian Lu,Dik-Lung Ma,Chung-Hang Leung,Yitao Wang,&Xiuping Chen.(2016).Cucurbitacin e induces caspase-dependent apoptosis and protective autophagy mediated by ROS in lung cancer cells.Chemico-Biological Interactions,253,1.
MLA Guixin Ma,et al."Cucurbitacin e induces caspase-dependent apoptosis and protective autophagy mediated by ROS in lung cancer cells".Chemico-Biological Interactions 253(2016):1.
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