“Clicked” Bivalent Ligands Containing Curcumin and Cholesterol As Multifunctional Aβ Oligomerization Inhibitors: Design, Synthesis, and Biological Characterization
作者:James A. Lenhart、Xiao Ling、Ronak Gandhi、Tai L. Guo、Phillip M. Gerk、Darlene H. Brunzell、Shijun Zhang
DOI:10.1021/jm100601q
日期:2010.8.26
In our effort to develop multifunctional compounds that cotarget beta-amyloid oligomers (A beta Os), cell membrane/lipid rafts (CM/LR), and oxidative stress, a series of bivalent multifunctional A beta oligomerization inhibitors (BMAOIs) containing cholesterol and curcumin were designed, synthesized, and biologically characterized as potential treatments for Alzheimer's disease (AD). The in vitro assay results established that the length of spacer that links cholesterol and curcumin and the attaching position of the spacer on curcumin are important structural determinants for their biological activities. Among the BMAOIs tested, 14 with a 21-atom-spacer was identified to localize to the CM/LR of human neuroblastoma MC65 cells, to inhibit the formation of A beta Os in MC65 cells, to protect cells from A beta Os-induced cytotoxicity, and to retain antioxidant properties of curcumin. Furthermore, 14 was confirmed to have the potential to cross the blood-brain barrier (BBB) as demonstrated in a Caco-2 cell model. Collectively, these results strongly encourage further optimization of 14 as a new hit to develop more potent BMAOIs.