目前可用于治疗阿尔茨海默病 (AD) 的药物数量非常有限,并且它们的治疗益处仅在疾病的早期状态中发挥作用。有效的治疗应该影响那些主要导致神经元衰变的过程。已经有许多减少有毒 Aβ 肽的方法,但大多未能阻止患者的认知恶化。神经原纤维缠结 (NFT) 及其前体 tau 寡聚体的形成已被认为是神经元变性的主要原因,因为它们的密度与痴呆的程度直接相关。减少 tau 聚集可能是治疗 AD 的可行方法。NFT 由过度磷酸化的 tau 蛋白组成,tau 过度磷酸化会降低微管结合。讨论了几种蛋白激酶参与 tau 过度磷酸化。我们开发了三种蛋白激酶(gsk-3β、cdk5 和 cdk1)的新型抑制剂,并讨论了它们与 tau 磷酸化和作为细胞中 tau 聚集的成核阶段的 tau-tau 相互作用的活性。对于那些对所有三种激酶都有影响的抑制剂观察到最强的影响,重点是纳摩尔范围内的 gsk-3β。
Multitargeted drug development: Discovery and profiling of dihydroxy substituted 1-aza-9-oxafluorenes as lead compounds targeting Alzheimer disease relevant kinases
作者:Volkmar Tell、Max Holzer、Lydia Herrmann、Kazem Ahmed Mahmoud、Christoph Schächtele、Frank Totzke、Andreas Hilgeroth
DOI:10.1016/j.bmcl.2012.09.006
日期:2012.11
Alzheimer disease (AD) turned out to be a multifactorial process leading to neuronal decay. So far merely single target structures which attribute to the AD progression have been considered to develop specific drugs. However, such drug developments have been disappointing in clinical stages. Multitargeting of more than one target structure determines recent studies of developing novel lead compounds. Protein kinases have been identified to contribute to the neuronal decay with CDK1, GSK-3 beta and CDK5/p25 being involved in a pathological tau protein hyperphosphorylation. We discovered novel lead structures of the dihydroxy-1-aza-9-oxafluorene type with nanomolar activities against CDK1, GSK-3 beta and CDK5/p25. Structure-activity relationships (SAR) of the protein kinase inhibition are discussed within our first compound series. One nanomolar active compound profiled as selective protein kinase inhibitor. Bioanalysis of a harmless cellular toxicity and of the inhibition of tau protein phosphorylation qualifies the compound for further studies. (C) 2012 Published by Elsevier Ltd.
Novel Protein Kinase Inhibitors Related to Tau Pathology Modulate Tau Protein-Self Interaction Using a Luciferase Complementation Assay
The current number of drugs available for the treatment of Alzheimer’sdisease (AD) is strongly limited and their benefit for therapy is given only in the early state of the disease. An effective therapy should affect those processes which mainly contribute to the neuronal decay. There have been many approaches for a reduction of toxic Aβ peptides which mostly failed to halt cognitive deterioration
目前可用于治疗阿尔茨海默病 (AD) 的药物数量非常有限,并且它们的治疗益处仅在疾病的早期状态中发挥作用。有效的治疗应该影响那些主要导致神经元衰变的过程。已经有许多减少有毒 Aβ 肽的方法,但大多未能阻止患者的认知恶化。神经原纤维缠结 (NFT) 及其前体 tau 寡聚体的形成已被认为是神经元变性的主要原因,因为它们的密度与痴呆的程度直接相关。减少 tau 聚集可能是治疗 AD 的可行方法。NFT 由过度磷酸化的 tau 蛋白组成,tau 过度磷酸化会降低微管结合。讨论了几种蛋白激酶参与 tau 过度磷酸化。我们开发了三种蛋白激酶(gsk-3β、cdk5 和 cdk1)的新型抑制剂,并讨论了它们与 tau 磷酸化和作为细胞中 tau 聚集的成核阶段的 tau-tau 相互作用的活性。对于那些对所有三种激酶都有影响的抑制剂观察到最强的影响,重点是纳摩尔范围内的 gsk-3β。