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Midazolam induces apoptosis in MA-10 mouse Leydig tumor cells through caspase activation and the involvement of MAPK signaling pathway

Authors So EC, Lin Y, Tseng C, Pan B, Cheng K, Wong K, Hao L, Wang Y, Huang B, Huang M

Received 16 October 2013

Accepted for publication 16 December 2013

Published 13 February 2014 Volume 2014:7 Pages 211—221


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 5

Edmund Cheung So,1,2 Yu-Xuan Lin,3 Chi Hao Tseng,1 Bo-Syong Pan,3 Ka-Shun Cheng,2 Kar-Lok Wong,2 Lyh-Jyh Hao,4 Yang-Kao Wang,5 Bu-Miin Huang2

1Department of Anesthesia, Tainan Municipal An Nan Hospital, China Medical University, Tainan, Taiwan; 2Department of Anesthesia, China Medical University, Taichung, Taiwan; 3Department of Cell Biology and Anatomy, National Cheng Kung University, Tainan, Taiwan; 4Department of Internal Medicine, Division of Endocrinology and Metabolism, Kaohsiung Veteran General Hospital Tainan Branch Tainan, Taiwan; 5Graduate Institute of Biomedical Materials and Tissue Engineering, Taipei Medical University, Taipei, Taiwan

Purpose: The present study aims to investigate how midazolam, a sedative drug for clinical use with cytotoxicity on neuronal and peripheral tissues, induced apoptosis in MA-10 mouse Leydig tumor cells.
Methods: The apoptotic effect and underlying mechanism of midazolam to MA-10 cells were investigated by flow cytometry assay and Western blotting methods.
Results: Data showed that midazolam induced the accumulation of the MA-10 cell population in the sub-G1 phase and a reduction in the G2/M phase in a time- and dose-dependent manner, suggesting an apoptotic phenomenon. Midazolam could also induce the activation of caspase-8, -9, and -3 and poly (ADP-ribose) polymerase proteins. There were no changes in the levels of Bax and cytochrome-c, whereas Bid was significantly decreased after midazolam treatment. Moreover, midazolam decreased both pAkt and Akt expression. In addition, midazolam stimulated the phosphorylation of p38 and c-Jun NH2-terminal kinase but not extracellular signal-regulated kinase.
Conclusion: Midazolam could induce MA-10 cell apoptosis through the activation of caspase cascade, the inhibition of pAkt pathway, and the induction of p38 and c-Jun NH2-terminal kinase pathways.

Keywords: midazolam, apoptosis, MA-10 cell, caspase, Akt, MAPKs

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