Gap junction communication involved in brain protection following focal ischemia and reperfusion in rats | |
Wang, F; Hai, J; Jing, YH; Jing, YH (reprint author), Lanzhou Univ, Sch Basic Med Sci, Lanzhou 730000, Gansu, Peoples R China. | |
刊名 | NEURAL REGENERATION RESEARCH |
2009-09 | |
卷号 | 4期号:9页码:677-682 |
关键词 | gap junction brain ischemia astrocytes microglia rats |
ISSN号 | 1673-5374 |
DOI | 10.3969/j.issn.1673-5374.2009.09.007 |
文献子类 | Article |
英文摘要 | BACKGROUND: Studies have suggested that gap junctions not only modulate the fate of the neocortex, but are also involved in maintaining homeostasis in the mature brain. However, the neuroprotective effects of gap junction communication following brain ischemic injury remain poorly understood. OBJECTIVE: To investigate the neuroprotective effects and possible mechanisms of gap junction communication following focal ischemia and reperfusion. DESIGN, TIME AND SETTING: A randomized, controlled, animal experiment was performed at the School of Basic Medical Sciences of Lanzhou University between June 2007 and May 2008. MATERIALS: Rabbit polyclonal anti-connexin 43 (Cx43) and gap junction blocking agent octanol were purchased from Sigma, USA; mouse monoclonal anti-rat glial fibrillary acidic protein (GFAP) was provided by Santa Cruz, USA; mouse monoclonal anti-rat CD11b was produced by Abcam, England. METHODS: A total of 52 adult, male, Sprague Dawley rats were randomly assigned to three groups: sham-operated (n = 12), vehicle control (n = 20), and octanol-treated (n = 20). Brain ischemia and reperfusion were induced by transient middle cerebral artery occlusion (MCAC) in vehicle control and octanol-treated groups, while no MCAO was administered to the sham-operated group. In the octanol-treated group, 5 mmol/kg octanol was dissolved in dimethyl sulfoxide (0.005% V/V) and was intraperitoneally injected 30 minutes prior to ischemic onset. Sham-operated and vehicle groups received equivalent volumes of dimethyl sulfoxide. MAIN OUTCOME MEASURES: Infarct volumes in ipsilateral striaturn after MCAO were measured using cresyl violet dye; GFAP, CD11 b, and Cx43 expression in the ipsilateral striaturn following MCAO were detected by immunohistochemistry; Western blot analysis was employed to determine Cx43 and GFAP expression. RESULTS: At 1 and 3 days following MCAO and reperfusion, ipsilateral striaturn infarct volumes in the octanol group were significantly greater than in the vehicle group (P < 0.05). There was no infarction in the sham-operated group. Cx43 and GFAP expression in the ipsilateral striaturn of the octanol group was remarkably decreased compared with the vehicle group (P < 0.05), and expression in the sham-operated group was less than in the other two groups (P < 0.05). In the octanol-treated group, CD11b expression was significantly increased compared with the vehicle group (P < 0.05), and there were less CD11b-immunoreactive cells in the sham-operated group compared with the other two groups (P < 0.05). CONCLUSION: The pretreatment of blocking gap junction aggravated brain injury following MCAC. These results were possibly due to reduced astrocyte proliferation and activation, as well as reduced inflammatory response via activated microglia. |
学科主题 | Cell Biology ; Neurosciences & Neurology |
出版地 | SHENYANG |
语种 | 英语 |
CSCD记录号 | CSCD:3680684 |
WOS记录号 | WOS:000270690300007 |
内容类型 | 期刊论文 |
源URL | [http://ir.lzu.edu.cn/handle/262010/121423] |
专题 | 基础医学院_期刊论文 |
通讯作者 | Jing, YH (reprint author), Lanzhou Univ, Sch Basic Med Sci, Lanzhou 730000, Gansu, Peoples R China. |
推荐引用方式 GB/T 7714 | Wang, F,Hai, J,Jing, YH,et al. Gap junction communication involved in brain protection following focal ischemia and reperfusion in rats[J]. NEURAL REGENERATION RESEARCH,2009,4(9):677-682. |
APA | Wang, F,Hai, J,Jing, YH,&Jing, YH .(2009).Gap junction communication involved in brain protection following focal ischemia and reperfusion in rats.NEURAL REGENERATION RESEARCH,4(9),677-682. |
MLA | Wang, F,et al."Gap junction communication involved in brain protection following focal ischemia and reperfusion in rats".NEURAL REGENERATION RESEARCH 4.9(2009):677-682. |
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