项目名称: 基于同步辐射光源微血管成像技术的大鼠脑缺血后侧枝循环开放的机理研究
项目编号: No.81201214
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 影像医学与生物医学工程
项目作者: 管永靖
作者单位: 上海交通大学
项目金额: 23万元
中文摘要: 早期侧枝循环的开放对缺血性脑卒中后缺血区脑组织的修复起着至关重要的作用。临床发现缺血区存在早期再灌注的患者预后良好,然而,由于影像技术的局限性,侧枝循环的开放不易被发现。应用同步辐射吸收成像技术,我们在大鼠大脑中动脉梗塞模型中发现阻断大鼠供应咬肌的颈外动脉后,翼腭动脉可发出侧枝供血。然而,在脑缺血后,是否存在侧枝循环向缺血区供血,何时开放,尚不清楚。本课题将依托上海光源在大鼠大脑中动脉梗塞模型中进行活体动态研究:1)脑缺血后大脑中动脉供血区侧枝循环的开放部位及时程的活体成像检测;2)早期扩血管药物干预是否可以促进脑缺血后侧枝循环开放及改善动物预后。本课题研究将建立活体观察大鼠脑部侧枝循环变化的新方法,研究脑缺血后侧枝循环的开放进程及其与药物干预之间的关系将有助于临床更好地设计缺血性脑卒中治疗方案。
中文关键词: 同步辐射;血管造影;原位活体;侧枝循环;卒中
英文摘要: Establishment of early collateral is a critical step in brain remodeling/repairing after ischemic stroke. Clinical observation found that earlier reperfusion is related to better prognosis. However, the collateral is difficult to be detected due to the limitation of imaging devices. Using synchrotron radiation angiography (SRA), we firstly visualized collateral between pterygopalatine artery (PPA) and external cervical artery (ECA) branches after ECA transection in rat middle cerebral artery occlusion (MCAO) models. If collateral existed, and when/where the collateral begin to form after ischemic stroke is unclear. Utilizing novel SRA technique and rat MCAO model, we will explore: 1) if collateral exists following MCAO? If so, when/where the collateral begins to form? 2) if early administration of vasodilation drug(nimodipine) promotes collateral opening and improve neurological outcomes? Our study will establish a unique method, which will dynamic observe collateral during MCAO. Study on the progress of collateral formation and early administration of vasodilation compound will provide useful evidence and benefit to clinical stroke therapy.
英文关键词: synchrotron radiation;angiography;in vivo;collateral circulation;stroke