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Sinensetin induces apoptosis and autophagy in the treatment of human T-cell lymphoma

Tan, Kok-Tonga,b; Lin, Meng-Xiana; Lin, Shih-Chaof; Tung, Yu-Tangd; Lin, Sheng-Haoe; Lin, Chi-Chienb,c

doi: 10.1097/CAD.0000000000000756

The present study was carried out to explore the effect of sinensetin in human T-cell lymphoma Jurkat cells and to reveal the underlying molecular mechanisms. We found that sinensetin significantly impeded Jurkat cell proliferation in a dose-dependent and time-dependent manner. Additionally, sinensetin treatment triggered apoptosis and autophagy in Jurkat cells. The apoptosis induction was related to a loss of mitochondrial membrane potential and to increased caspase-3/-8/-9 and poly(ADP-ribose) polymerase (PARP) cleavage. Sinensetin also induced autophagy, as evidenced by the formation of acidic vacuoles, the upregulation of LC3-II and beclin-1, and the downregulation of p62. In addition, the inhibition of autophagy by 3-methyladenine significantly enhanced the apoptosis rate and improved the sensitivity of the Jurkat cells to sinensetin. Moreover, sinensetin induced cell death, apoptosis, and autophagy through the activation of the reactive oxygen species/ c-Jun N-terminal kinase signaling pathway and the inhibition of the Akt/mTOR signaling pathways. In summary, our results revealed that sinensetin induced apoptosis and autophagy in human T-cell lymphoma Jurkat cells by activating reactive oxygen species/ c-Jun N-terminal kinase and blocking the Akt/mTOR signaling pathways. Thus, sinensetin might be a potential candidate in the development of antitumor drugs targeting T-cell leukemia.

aDepartment of Surgery, Tungs’ Taichung MetroHarbor Hospital

bInstitute of Biomedical Science, National Chung-Hsing University

cDepartment of Medical Research, China Medical University Hospital, Taichung, Taiwan

dGraduate Institute of Metabolism and Obesity Sciences, Taipei Medical University, Taipei

eDivision of Chest Medicine, Department of Internal Medicine, Changhua Christian Hospital, Changhua, Taiwan, Republic of China

fNational Center for Biodefense and Infectious Diseases, School of Systems Biology, George Mason University, Manassas, Virginia, USA

Correspondence to Chi-Chien Lin, PhD, Institute of Biomedical Science, National Chung-Hsing University, 145 Xingda Road, South District, Taichung City 402, Taiwan, Republic of China Tel: +886 422 851 175; fax: +886 422 853 469; e-mail:

Received October 24, 2018

Accepted January 14, 2019

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