项目名称: 肌醇焦磷脂IP7对tau蛋白异常磷酸化的影响及机制研究
项目编号: No.81202515
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 药物学、药理学
项目作者: 韩仰
作者单位: 中南大学
项目金额: 23万元
中文摘要: tau蛋白分子在神经细胞内异常聚集,是阿尔茨海默病(AD)最关键的病理特征之一。以tau为靶点的药物开发和以改善胰岛素信号传导通路的治疗策略是当今AD病研究领域的前沿和热点。焦磷酸肌醇作为磷脂酰肌醇家族中的新成员,由于参与了机体内大量生理功能的调节而越来越受到关注,其中最具代表性的是肌醇焦磷酯IP7(5-PP-[1,2,3,4,6]IP5),对机体内的细胞凋亡以及胰岛素分泌具有重要调控作用。本项目拟从新兴研究的焦磷酸肌醇IP7分子入手,通过构建动物模型,细胞培养,RNA干扰,免疫印记,基因转染等技术,在阐明IP7对tau蛋白异常磷酸化影响的基础上,进一步从分子水平探讨这一改变的信号转导过程以及发生机制,拟证实其关键合成酶IP6K1是改善AD病tau蛋白异常磷酸一个可能的新靶点。本项目有助于阐明IP7参与tau蛋白异常磷酸化的调节机制,为今后治疗AD的药物设计与开发提供新思路。
中文关键词: tau蛋白;阿尔茨海默病;肌醇焦磷脂;异常聚集;
英文摘要: Abnormally hyperphosphorylation of tau protein plays a critical role in the pathogenesis of Alzheimer disease (AD).Drugs targeted on tau protein and treatment strategy to improve insulin signaling pathways are both the hot spots in the AD therapy. Higher inositol phosphates with energetic pyrophosphate bonds have been described more recently and attracts more and more attention. Best characterized is diphosphoinositol pentakisphosphate IP7(5-PP-[1,2,3,4,6]IP5), which modulates numerous physiologic functions including apoptosis and insulin secretion. This project is aim to find the effect of inositol pyrophosphate IP7 on tau hyperphosphorylation and further more about its molecular mechanism and signal transduction process, using animal model construction, cell culture, RNA interference, western blotting and gene transfer techniques, intends to prove that its key synthase IP6K1 is a potential new target to improve the tau protein abnormal hyperphosphorylation of AD disease. This project makes preliminary exploration for the mechanism of AD therapy and provides new ideas for drug design.
英文关键词: tau protein;Alzheimer’s disease;inositol pyrophosphate;hyperphosphorylation;