阿尔海默氏病(Alzheimer’sdisease,AD)有两个重要的病理学特征:由超磷酸化的tau蛋白在神经元内形成的纤维缠结和β淀粉样蛋白(β-amyloid,Aβ)在脑域胞外形成的淀粉样斑。其中Aβ是由其前体蛋白APP(amyloidprecursorprotein)经β和γ分泌酶复合体切割产生。γ分泌酶复合体包括早老素1(presenilin1,PS1),早老素2(presenilin2,PS2),APH1,PEN2,nicastrin等多种蛋白因子,在它们的共同作用下才具有完整活性。研究发现PS1除了参与构成γ分泌酶复合体外,还能激活PI3K/Akt信号转导通路,而且这一作用与γ分泌...Alzheimer's disease (AD) is characterized by β-amyloid plaques consisting of β-amyloid (Aβ) peptides and neurofibrillary tangles consisting of hyperphosphorylated tau protein. Aβ is proteolytically derived from its precursor protein through cleavages by β-secretase and γ-secretase complex comprising presenilins (PS, PS1/PS2), nicastrin, APH-1 and PEN-2. PS1 is also known to activate the PI3K/Akt c...学位:理学硕士院系专业:生命科学学院生物医学科学系_细胞生物学学号:20042606