项目名称: 中枢炎症在术后认知功能障碍中的机制研究
项目编号: No.81471119
项目类型: 面上项目
立项/批准年度: 2015
项目学科: 医药、卫生
项目作者: 徐志鹏
作者单位: 中国人民解放军总医院
项目金额: 70万元
中文摘要: 术后认知功能障碍(POCD)增加了患者术后的患病率和死亡率,加重了患者的医疗负担。目前对POCD的研究主要集中于吸入麻醉药和手术炎症的影响方面,但是具体的分子机制都不清楚,目前手术炎症的动物模型也不完美,临床研究还没有涉及预防和治疗研究。我们课题组创建了局部麻醉药下的动物手术模型,避免了全身麻醉药的影响,发现这一模型下小鼠认知功能障碍,脑内炎症发生,血脑屏障破坏。近年来的研究发现,手术后中枢炎症可以破坏血脑屏障、激活NFκB信号通路,但是影响认知功能的分子机制还不清楚,我们提出以下假说:手术炎症激活Wnt通路使血脑屏障通透性增加,影响神经突触可塑性,导致内质网应激,影响脑内环境和神经功能。因此,我们拟通过临床研究、局部麻醉药下的动物手术模型、体外细胞培养模型,结合分子生物学、神经电生理等技术手段以阐明手术引起中枢炎症、影响认知功能的具体分子机制,为预防和治疗POCD提供依据。
中文关键词: 术后认知功能障碍;突触可塑性;小胶质细胞;学习记忆;神经炎症
英文摘要: Postoperative cognitive dysfunction or decline (POCD) is an increasingly recognized phenomenon after major surgery and is associated with impairments in daily functioning and increased morbidity and mortality. Previous studies focused on inhaled anesthetics and inflammatory factors after surgery. However, the mechanism of the pathway about how neuroinflammation impaires cognitive function remains unclear. There are no perfect animal models for POCD and clinical study for treating and/or preventing POCD. These gaps of knowledge block prevention and treatment of diseases involve neuroinflammation including POCD. We have established the animal model of surgery under local anesthesia to avoid the effect of general anesthesia. We found the impaired cognition, neuroinflammation and increased permeability of blood brain barrier after surgery. Recent studies confirmed these findings. But the the mechanism is unclear. So we draw the hypothesis that: neuroinflammation actives the Wnt pathway then increases the permeability of blood brain barrier and decreases synaptic plasticity and actives ER stress to effect cognitive dysfunction. We ask the proposal to determine the mechanism of how neuroinflammation impaires cognitive function and find the way to prevent and/or treat POCD.
英文关键词: POCD;Synaptic plasticity;Microglia;Learning memory;Neuroinflammation