Metal-dependent inhibition of amyloid fibril formation: synergistic effects of cobalt–tannic acid networks. Issue 4 (15th January 2019)

• Record Type: Journal Article
• Authors: Zhang, Wenjie; Christofferson, Andrew J.; Besford, Quinn A.; Richardson, Joseph J.; Guo, Junling; Ju, Yi; Kempe, Kristian; Yarovsky, Irene; Caruso, Frank
• Is Part Of: Nanoscale. Volume 11:Issue 4(2019)
• Page Start: 1921
• Page End: 1928
• Publication Date: 2019-01-15
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c8nr09221d
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Cobalt–tannic acid-coated gold nanoparticles are found to better inhibit amyloid fibril formation than other metal-based tannic acid-coated particles. Abstract : Metal–phenolic networks (MPNs) have received widespread interest owing to their modular incorporation of functional metal ions and phenolic ligands. However, the interaction between MPNs and biomolecules is still relatively unexplored. Herein, we studied the effects of MPN-coated gold nanoparticles on amyloid fibril formation (which is associated with Alzheimer's disease) as a function of the metal ion in the MPN systems. All coated particles examined inhibited amyloid formation, with cobalt(ii ) MPN-coated particles exhibiting the highest inhibition activity (90%). Molecular dynamics simulations and quantum mechanics calculations suggested that the geometry of the exposed cobalt coordination site in the cobalt–tannic acid networks facilitates its interactions with histidine and methionine residues in the amyloid beta peptides. Furthermore, the unique structure of cobalt MPNs may enable a wider variety of biomedical applications.