title: Reduced aggregation and cytotoxicity of amyloid peptides by graphene oxide/gold nanocomposites prepared by pulsed laser ablation in water.
abstract: A novel and convenient method to synthesize the nanocomposites combining graphene oxides (GO) with gold nanoparticles (AuNPs) is reported and their applications to modulate amyloid peptide aggregation are demonstrated. The nanocomposites produced by pulsed laser ablation (PLA) in water show good biocompatibility and solubility. The reduced aggregation of amyloid peptides by the nanocomposites is confirmed by Thioflavin T fluorescence and atomic force microscopy. The cell viability experiments reveals that the presence of the nanocomposites can significantly reduce the cytotoxicity of the amyloid peptides. Furthermore, the depolymerization of peptide fibrils and inhibition of their cellular cytotoxicity by GO/AuNPs is also observed. These observations suggest that the nanocomposites combining GO and AuNPs have a great potential for designing new therapeutic agents and are promising for future treatment of amyloid-related diseases.
authors: CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology, Beijing, 100190, (China).
authors: Jingying
authors: J
authors: Li
authors: Qiusen
authors: Q
authors: Han
authors: Xinhuan
authors: X
authors: Wang
authors: Ning
authors: N
authors: Yu
authors: Lin
authors: L
authors: Yang
authors: Rong
authors: R
authors: Yang
authors: Chen
authors: C
authors: Wang
mesh_terms: D058227:Amyloidogenic Proteins / Q000737:chemistry / Q000378:metabolism*; D002470:Cell Survival; D002478:Cells, Cultured; D006046:Gold / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D006801:Humans; D053685:Laser Therapy / Q000295:instrumentation / Q000379:methods*; D007834:Lasers; D008422:Materials Testing; D053761:Nanocomposites / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D010455:Peptides / Q000737:chemistry / Q000378:metabolism; D066263:Protein Aggregation, Pathological / Q000378:metabolism / Q000517:prevention & control*; D014867:Water / Q000737:chemistry*
chemical_list: D058227:Amyloidogenic Proteins; D010087:Oxides; D010455:Peptides; D014867:Water; D006046:Gold; D006108:Graphite
keywords: aggregation; graphene oxides; nanocomposites; pulsed laser ablation; β-amyloid