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Neurochem Int. 2019 Mar;124:51-61. doi: 10.1016/j.neuint.2018.12.010. Epub 2018 Dec 21.

Quantitative iTRAQ-based proteomic analysis of piperine protected cerebral ischemia/reperfusion injury in rat brain.

Author information

1
Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, 430071, China.
2
Department of Neurosurgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, 430060, China.
3
Institute of Neuroregeneration and Neurorehabilitation of Qingdao University, Qingdao, Shandong, 266071, China.
4
Queensland Brain Institute of the University of Queensland, St Lucia, Queensland, Australia.
5
Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, 430071, China; Department of Neurosurgery, Tongji Hospital of Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China. Electronic address: chenjincao2012@hotmail.com.

Abstract

Piperine is the key bioactive factor in black pepper, and has been reported to alleviate cerebral ischemic injury. However, the mechanisms underlying its neuroprotective effects following cerebral ischemia remain unclear. In this study, rats were administered vehicle (dimethyl sulfoxide) or piperine, 20 mg/kg, daily for 14 days before focal cerebral artery occlusion. After occlusion for 2 h followed by reperfusion for 24 h. Histological examinations were used to assess whether piperine has a neuroprotective effect in the rat model of cerebral ischemia/reperfusion injury. The levels of proteins in the ischemic penumbra were evaluated by isobaric tags for relative and absolute quantitation-based proteomics. A total of 3687 proteins were identified, including 23 proteins that were highly significantly differentially expressed between the control and piperine groups. The proteomic findings were verified by immunofluorescence and western blot analysis. Interestingly, piperine administration downregulated a number of critical factors in the complement and coagulation cascades, including complement component 3, fibrinogen gamma chain, alpha-2-macroglobulin, and serpin family A member 1. Collectively, our findings suggest that the neuroprotective effects of piperine following cerebral ischemia/reperfusion injury are related to the regulation of the complement and coagulation cascades.

KEYWORDS:

Complement and coagulation cascade; Ischemia penumbra; Piperine; Proteome; iTRAQ

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