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Neuroscience. 2017 Sep 30;360:118-127. doi: 10.1016/j.neuroscience.2017.07.062. Epub 2017 Aug 4.

Downregulation of TRB3 protects neurons against apoptosis induced by global cerebral ischemia and reperfusion injury in rats.

Author information

1
Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China. Electronic address: wei-kai-cool@163.com.
2
Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China. Electronic address: wanli0604@163.com.
3
Department of Pathophysiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China. Electronic address: liujintt@163.com.
4
Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China. Electronic address: zhangbo_1119@126.com.
5
Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China. Electronic address: 15871796517@163.com.
6
Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China. Electronic address: y.zhang0604@hotmail.com.
7
Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China. Electronic address: chuanhan_zhang@163.com.
8
Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China. Electronic address: wlyao82@126.com.

Abstract

Global cerebral ischemia and reperfusion injury (GCI/R) can lead to neuronal apoptosis and contributes to permanent neurological sequelae. However, the underlying mechanism is largely unknown. Therefore, the present study aimed to assess the effects of GCI/R on the tribbles homolog 3 (TRB3) and to explore the role of TRB3 in GCI/R. The GCI/R model was developed in Sprague-Dawley male rats by four-vessel occlusion. Subsequently, the expressions of TRB3, endoplasmic reticulum stress markers, and apoptosis-associated proteins were examined by western blot at 1h, 6h, 12h, 24h, and 72h after GCI/R. TRB3 short-hairpin RNA (shRNA) lentivirus was constructed and used to investigate the role of TRB3 in GCI/R-induced neuronal apoptosis. GCI/R increased the level of TRB3, endoplasmic reticulum stress markers, and pro-apoptotic proteins. The level of protein kinase B (Akt) phosphorylation was reduced during GCI/R. Administration of TRB3 shRNA lentivirus attenuated GCI/R-induced up-regulation of TRB3, endoplasmic reticulum stress, and neuronal apoptosis. Furthermore, TRB3 shRNA lentivirus reversed the reduced level of Akt phosphorylation induced by GCI/R. These data implied that TRB3 participated in the GCI/R-induced neuronal apoptosis. Knocking down TRB3 attenuated endoplasmic reticulum stress, enhanced Akt phosphorylation, and protected neurons from apoptosis in response to GCI/R. These results demonstrated that the downregulation of TRB3 may be a promising approach for treating GCI/R.

KEYWORDS:

apoptosis; cerebral ischemia; endoplasmic reticulum stress; homolog tribbles 3; neuron

[Indexed for MEDLINE]

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