项目名称: α26230;状体蛋白促进视神经再生的分子机制研究
项目编号: No.30872833
项目类型: 面上项目
立项/批准年度: 2009
项目学科: 金属学与金属工艺
项目作者: 王一
作者单位: 中国人民解放军第三军医大学
项目金额: 30万元
中文摘要: 视神经损伤后再生是眼科临床未解难题,也是眼科基础研究难点和热点。近年发现晶状体损伤后释放的物质能显著促进视神经再生,并与上丘形成功能性突触联系。我们前期研究证明:α26230;状体蛋白是晶状体来源的促进视神经再生的主要作用物质,且能结合在视网膜神经节细胞(RGCs)胞膜上,并拮抗髓鞘抑制物的阻碍作用促进RGCs突起生长。因此,我们提出RGCs 膜上存在α26230;状体蛋白受体,α26230;状体蛋白通过与其特异性受体结合,作用于再生抑制物信号传导通路关节点"RhoA/ROCK"促进视神经再生的假说。拟用受体结合和竞争抑制实验、光学生物传感技术、亲和层析、肽指纹质谱分析、蛋白质测序等方法,探寻并获得RGCs 膜上的α26230;状体蛋白受体,并通过在体和离体实验,研究α26230;体蛋白对RhoA/ROCK及下游物质活化和生长锥萎缩情况的影响,探讨α26230;体蛋白促进视神经再生的分子机制。为视神经再生研究寻求突破,为新药设计奠定基础。
中文关键词: α26230;状体蛋白;受体;视网膜神经节细胞(RGCs);神经再生; RhoA/ROCK
英文摘要: Optic nerve injury and regeneration is an eye clinical unsolved problem, is also an eye basic research difficult and hot points.In recent years several lines of evidence have suggested that after injury of the substance of the lens release can significantly improve the optic nerve regeneration, and make synaptic connections within the brain.We have found that a-crystallin deriving from the lens was an important survival factor to promote optic nerve regeneration.It could be combined with cell membrane of RGCs and antagonize myelin inhibit things and stimulate RGCs axon regeneration.Therefore, we hypotheses that a-crystallin can inhibit signaling pathways that closely "RhoA/ROCK" to promote the optic nerve regeneration through its specific receptor.In the study, the a-crystallin receptor on RGCs membrane wound be obtained by using receptor binding and competitive inhibition experiment, biological sensing technology, affinity chromatograph,mass chromatographic analysis and protein sequencing methods.The effect of a-crystallin on "RhoA/ROCK"signaling pathway and growth cones atrophy would also be investigated in vivo and in vitro. We discuss the molecular mechanisms of a-crystallin on promoting optic nerve regeneration in order to lay the foundation for new drugs of the optic nerve regeneration.
英文关键词: a-crystallin; receptor; retinal ganglin cells; optic nerve regeneration; RhoA/ROCK