Abnormal hyperphosphorylation and accumulation of tau protein play a pivotal role in neurodegeneration in Alzheimer’s disease(AD)and many other tauopathies.Selective elimination of hyperphosphorylated tau is promisin...Abnormal hyperphosphorylation and accumulation of tau protein play a pivotal role in neurodegeneration in Alzheimer’s disease(AD)and many other tauopathies.Selective elimination of hyperphosphorylated tau is promising for the therapy of these diseases.We have conceptualized a strategy,named dephosphorylation-targeting chimeras(DEPTACs),for specifically hijacking phosphatases to tau to debilitate its hyperphosphorylation.Here,we conducted the step-by-step optimization of each constituent motif to generate DEPTACs with reasonable effectiveness in facilitating the dephosphorylation and subsequent clearance of pathological tau.Specifically,for one of the selected chimeras,D16,we demonstrated its significant efficiency in rescuing the neurodegeneration caused by neurotoxic K18-tau seeds in vitro.Moreover,intravenous administration of D16 also alleviated tau pathologies in the brain and improved memory deficits in AD mice.These results suggested DEPTACs as targeted modulators of tau phosphorylation,which hold therapeutic potential for AD and other tauopathies.展开更多
基金supported by the National Natural Science Foundation of China(82230041,91949205,31730035,81721005)the National Key R&D Program of China(2016YFC1305800)the Guangdong Provincial Key S&T Program(018B030336001)。
文摘Abnormal hyperphosphorylation and accumulation of tau protein play a pivotal role in neurodegeneration in Alzheimer’s disease(AD)and many other tauopathies.Selective elimination of hyperphosphorylated tau is promising for the therapy of these diseases.We have conceptualized a strategy,named dephosphorylation-targeting chimeras(DEPTACs),for specifically hijacking phosphatases to tau to debilitate its hyperphosphorylation.Here,we conducted the step-by-step optimization of each constituent motif to generate DEPTACs with reasonable effectiveness in facilitating the dephosphorylation and subsequent clearance of pathological tau.Specifically,for one of the selected chimeras,D16,we demonstrated its significant efficiency in rescuing the neurodegeneration caused by neurotoxic K18-tau seeds in vitro.Moreover,intravenous administration of D16 also alleviated tau pathologies in the brain and improved memory deficits in AD mice.These results suggested DEPTACs as targeted modulators of tau phosphorylation,which hold therapeutic potential for AD and other tauopathies.
文摘目的:系统评价脑蛋白水解物辅助治疗急性脑梗死的疗效与安全性,为临床提供循证参考。方法:计算机检索SCI、Cochrane图书馆、EMBase、Pub Med、中国期刊全文数据库(CJFD)、中文科技期刊数据库(VIP)、万方数据库,收集脑蛋白水解物联合常规方案(试验组)对比单纯常规方案或联合安慰剂(对照组)治疗急性脑梗死的随机对照试验(RCT),提取资料并按照Cochrane系统评价员手册5.1.0评价质量后,采用Rev Man 5.2统计软件对数据进行Meta分析。结果:最终纳入20项RCT,包括3 313例患者。Meta分析结果显示,试验组患者美国国立卫生研究院卒中量表(NIHSS)评分[MD=-1.77,95%CI(-2.33,-1.21),P<0.001]、有效率[OR=2.85,95%CI(1.75,4.63),P<0.001]、Barthel指数(BI)评分[MD=7.30,95%CI(3.48,11.13),P<0.001]显著高于对照组,差异均有统计学意义;两组患者致残率[OR=0.46,95%CI(0.20,1.03),P=0.06]、死亡率[OR=0.79,95%CI(0.52,1.19),P=0.25]、不良反应发生率[OR=1.04,95%CI(0.85,1.27),P=0.72]和严重不良反应发生率[OR=0.01,95%CI(-0.02,0.04),P=0.51]比较,差异均无统计学意义。结论:脑蛋白水解物辅助治疗急性脑梗死疗效较好,可以显著改善患者神经功能缺损状态和生活质量,且不增加不良反应的发生。
