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Temporal dynamic changes of connexin 43 expression in C6 cells following lipopolysaccharide stimulation

查看全文 作　　者：Ling [1]Liu;Zhenping [1]Gao;Linbo [2]Zhang;Lue [1]Su;Guojun [1]Dong;Haiyang [1]Yu;Jiayi [1]Tian;Hang [1]Zhao;Yanyan [1]Xu;Haiyan [1]Liu 高影响力作者 机构地区：[1]Department of Human Anatomy, Norman Bethune College of Medicine, Jflin University, Changchun 130021, Jilin Province, China;[2]Department of Pharmaceutical Engineering, College of Life Sciences, Jilin Agricultural University, Changchun 130118, Jilin Province, China高影响力机构 出　　处：《Neural Regeneration Research》索引2012年第7卷第25期,共7页高影响力期刊 基　　金：sponsored by the National Natural Science Foundation of China,No. 30901323 摘　　要：Connexin 43,a gap junction protein,is expressed mainly in glia in the central nervous system.Neuroinflammation plays an important role in central nervous system injury.Changes to glial connexin 43 levels and neuroinflammation may trigger brain injury and neurodegenerative diseases.To illustrate the relationship between connexin 43 and neuroinflammation,this study investigated how connexin 43 expression levels change in lipopolysaccharide-stimulated rat C6 glioma cells.C6 cells were treated with 0.05,0.25,0.5,1,2.5 and 5 μg/mL lipopolysaccharide for 24 hours.The nitrite estimation-detected nitric oxide release level was elevated substantially after lipopolysaccharide stimulation.To test the transcriptional level changes of inducible nitric oxide synthase,tumor necrosis factor-α and connexin 43 mRNA,C6 cells were treated with 5 μg/mL lipopolysaccharide for 3-48 hours.Reverse transcription-PCR showed that the expression of inducible nitric oxide synthase and tumor necrosis factor-α mRNA increased over time,but connexin 43 mRNA levels increased in lipopolysaccharide-stimulated C6 cells at 3 and 6 hours,and then decreased from 12 to 48 hours.Connexin 43 protein expression was detected by immunofluorescence staining,and the protein levels matched the mRNA expression levels.These results suggest that connexin 43 expression is biphasic in lipopolysaccharide-induced neuroinflammation in C6 cells,which may be correlated with the connexin 43 compensatory mechanism. 关 键 词：间隙连接蛋白43 C6细胞 时空动态变化 诱导型一氧化氮合酶 RT-PCR检测 中枢神经系统损伤 肿瘤坏死因子-α MRNA表达水平
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