项目名称: LPS经鼻暴露对A53T-α-synuclein帕金森小鼠模型发生发展的协同效应及机制研究
项目编号: No.81501085
项目类型: 青年科学基金项目
立项/批准年度: 2016
项目学科: 医药、卫生
项目作者: 和青
作者单位: 上海交通大学
项目金额: 20万元
中文摘要: 帕金森病(PD)的病因目前尚不清楚,大多数研究认为可能与遗传和环境因素相互作用有关。α-Synuclein是PD特征性病理标志路易小体的主要成分,其基因错义突变(A53T,A30P,E46K)可致家族性PD。经鼻通路可能是环境毒物入脑的真实路径。我们的前期工作使用环境中重要的致炎因子LPS经鼻慢性暴露C57/B6小鼠成功地复制小鼠PD的典型特征。本研究中,我们使用LPS经鼻慢性暴露过表达人突变A53T-α-synuclein转基因小鼠,评估小鼠PD病理学、行为学、生物化学改变及小胶质细胞激活、星形胶质细胞增生及免疫细胞浸润。通过体内外实验观察LPS经鼻暴露与α-synuclein高负荷对小鼠PD形成的协同或叠加作用,探索α-synuclein是否抑制胶质细胞内Nurr1的表达,从而放大LPS引起的CNS炎症微环境,为PD发病机制提供新的、更加详实可信的实验数据,为疾病的干预提供新的思路。
中文关键词: 帕金森病;α-突触核蛋白;LPS;胶质细胞;神经炎症
英文摘要: The etiology of Parkinson’s disease (PD) is still unclear. The interaction of genetic and environmental factors is believed to be involved in chronic PD progression. Abnormal aggregated α-synuclein is the main component of Lewy body in PD patients. Three different point mutations of α-synuclein caused familial PD (A53T,A30P,E46K). The intranasal route is believed to be a gate way to the brain which facilitates entry of environmental neurotoxin into the brain. In this study, we will chronically apply intranasal LPS exposure on A53T-α-synuclein transgenic C57BL/6 mice to evaluate the behavorial, pathological, biochemical changes as well as microglial activation, astrogliosis, lymphocytes infiltration. We aim to observe the synergistic effect of intranasal LPS and α-synuclein burden on PD progression, inspecting whether α-synuclein induces the inhibition of Nurr1 in glial cells and attribute to the amplified neuroinflammation in the CNS. These two-hit animals (neuroinflammation and α-synuclein mutation) might help us to investigate the mechanisms through which mutant α-synuclein and inflammation work in concert to mediate PD neurodegeneration.
英文关键词: Parkinson’s disease;α-synuclein;LPS;Glial cells;Neuroinflammation