Galanin protects against nerve injury after shear stress in primary cultured rat cortical neurons

The neuropeptide galanin and its receptors (GalR) are found to be up-regulated in brains suffering from nerve injury, but the specific role played by galanin remains unclear. This study aimed to explore the neuroprotective role of galanin after shear stress induced nerve injury in the primary cultur...

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Veröffentlicht in:PloS one 2013-05, Vol.8 (5), p.e63473
Hauptverfasser: Liu, Meili, Song, Wei, Li, Ping, Huang, Yan, Gong, Xianghui, Zhou, Gang, Jia, Xiaoling, Zheng, Lisha, Fan, Yubo
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container_title PloS one
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Song, Wei
Li, Ping
Huang, Yan
Gong, Xianghui
Zhou, Gang
Jia, Xiaoling
Zheng, Lisha
Fan, Yubo
description The neuropeptide galanin and its receptors (GalR) are found to be up-regulated in brains suffering from nerve injury, but the specific role played by galanin remains unclear. This study aimed to explore the neuroprotective role of galanin after shear stress induced nerve injury in the primary cultured cortical neurons of rats. Our results demonstrated that no significant changes in cell death and viability were found after galanin treatment when subjected to a shear stress of 5 dyn/cm(2) for 12 h, after increasing magnitude of shear stress to 10 dyn/cm(2) for 12 h, cell death was significantly increased, while galanin can inhibit the nerve injury induced by shear stress with 10 dyn/cm(2) for 12 h. Moreover, Gal2-11 (an agonist of GalR2/3) could also effectively inhibit shear stress-induced nerve injury of primary cultured cortical neurons in rats. Although GalR2 is involved in the galanin protection mechanism, there was no GalR3 expression in this system. Moreover, galanin increased the excitatory postsynaptic currents (EPSCs), which can effectively inhibit the physiological effects of shear stress. Galanin was also found to inhibit the activation of p53 and Bax, and further reversed the down regulation of Bcl-2 induced by shear stress. Our results strongly demonstrated that galanin plays a neuroprotective role in injured cortical neurons of rats.
doi_str_mv 10.1371/journal.pone.0063473
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This study aimed to explore the neuroprotective role of galanin after shear stress induced nerve injury in the primary cultured cortical neurons of rats. Our results demonstrated that no significant changes in cell death and viability were found after galanin treatment when subjected to a shear stress of 5 dyn/cm(2) for 12 h, after increasing magnitude of shear stress to 10 dyn/cm(2) for 12 h, cell death was significantly increased, while galanin can inhibit the nerve injury induced by shear stress with 10 dyn/cm(2) for 12 h. Moreover, Gal2-11 (an agonist of GalR2/3) could also effectively inhibit shear stress-induced nerve injury of primary cultured cortical neurons in rats. Although GalR2 is involved in the galanin protection mechanism, there was no GalR3 expression in this system. Moreover, galanin increased the excitatory postsynaptic currents (EPSCs), which can effectively inhibit the physiological effects of shear stress. Galanin was also found to inhibit the activation of p53 and Bax, and further reversed the down regulation of Bcl-2 induced by shear stress. 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Galanin was also found to inhibit the activation of p53 and Bax, and further reversed the down regulation of Bcl-2 induced by shear stress. 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This study aimed to explore the neuroprotective role of galanin after shear stress induced nerve injury in the primary cultured cortical neurons of rats. Our results demonstrated that no significant changes in cell death and viability were found after galanin treatment when subjected to a shear stress of 5 dyn/cm(2) for 12 h, after increasing magnitude of shear stress to 10 dyn/cm(2) for 12 h, cell death was significantly increased, while galanin can inhibit the nerve injury induced by shear stress with 10 dyn/cm(2) for 12 h. Moreover, Gal2-11 (an agonist of GalR2/3) could also effectively inhibit shear stress-induced nerve injury of primary cultured cortical neurons in rats. Although GalR2 is involved in the galanin protection mechanism, there was no GalR3 expression in this system. Moreover, galanin increased the excitatory postsynaptic currents (EPSCs), which can effectively inhibit the physiological effects of shear stress. Galanin was also found to inhibit the activation of p53 and Bax, and further reversed the down regulation of Bcl-2 induced by shear stress. Our results strongly demonstrated that galanin plays a neuroprotective role in injured cortical neurons of rats.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>23691051</pmid><doi>10.1371/journal.pone.0063473</doi><tpages>e63473</tpages><oa>free_for_read</oa></addata></record>
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subjects Animals
Apoptosis
Apoptosis - drug effects
Bax protein
Bcl-2 protein
bcl-2-Associated X Protein - metabolism
Biology
Biomechanics
Brain
Cell death
Cells, Cultured
Cerebral Cortex - pathology
Cerebral Cortex - physiopathology
Cranial Nerve Injuries - metabolism
Cranial Nerve Injuries - pathology
Cranial Nerve Injuries - physiopathology
Cranial Nerve Injuries - prevention & control
Disease
Education
Engineering
Excitatory postsynaptic potentials
Excitatory Postsynaptic Potentials - drug effects
Galanin
Galanin - pharmacology
Gene Expression Regulation - drug effects
Injuries
Laboratories
Medicine
Nervous system
Neurons
Neurons - drug effects
Neurons - pathology
Neuropeptides
Neuroprotection
Neuroprotective Agents - pharmacology
p53 Protein
Physiological effects
Proteins
Proto-Oncogene Proteins c-bcl-2 - metabolism
Rats
Receptors
Receptors, Galanin - genetics
Rodents
Science
Shear Strength
Shear stress
Shear stresses
Signal Transduction - drug effects
Stress, Mechanical
Traumatic brain injury
Tumor proteins
Tumor Suppressor Protein p53 - metabolism
Viability
title Galanin protects against nerve injury after shear stress in primary cultured rat cortical neurons
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