Soluble sugar-based quinoline derivatives as new antioxidant modulators of metal-induced amyloid aggregation.
Oxidative stress and protein aggregation have been demonstrated to be the major factors involved in neurodegenerative diseases. Metal ions play a pivotal role, acting as mediators of neurotoxicity either by favoring or redox cycling. Thus, they represent a promising and suitable therapeutic target for the treatment of neurodegenerative disorders. In particular, the development of bifunctional or multifunctional molecules, which have antiaggregant and metal-chelating/antioxidant properties, may be considered as a valuable strategy for the treatment of neurodegeneration considering its multifactorial nature. Herein, we report the design and the characterization of four new multifunctional sugar-appended 8-hydroxyquinolines focusing on the effects of the conjugation with trehalose, a nonreducing disaccharide involved in the protection of proteins and cells against environmental stresses. These glycoconjugates do not exhibit any antiproliferative activity against three human cell lines of different histological origin, unlike 8-hydroxyquinolines. The multiple properties of the new derivatives are highlighted, reporting their Cu(2+) and Zn(2+) binding ability, and antioxidant and antiaggregant capacities. In particular, these latter were determined by different assays, including the evaluation of their ability to modulate or even suppress the aggregation of Aβ1-40 and Aβ1-42 peptides induced by copper or zinc ions.
Dipartimento di Scienze Chimiche, Università degli Studi di Catania , Viale A. Doria 6, 95125 Catania, Italy.
Valentina
V
Oliveri
Giuseppa I
GI
Grasso
Francesco
F
Bellia
Francesco
F
Attanasio
Maurizio
M
Viale
Graziella
G
Vecchio
D016229:Amyloid beta-Peptides / Q000737:chemistry*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D003300:Copper / Q000494:pharmacology; D016166:Free Radical Scavengers / Q000737:chemistry / Q000494:pharmacology; D005947:Glucose / Q000737:chemistry*; D006801:Humans; D008670:Metals / Q000494:pharmacology*; D008958:Models, Molecular; D010446:Peptide Fragments / Q000737:chemistry*; D055503:Protein Multimerization / Q000187:drug effects*; D017433:Protein Structure, Secondary; D011804:Quinolines / Q000737:chemistry* / Q000494:pharmacology*; D012995:Solubility; D015032:Zinc / Q000494:pharmacology
D016229:Amyloid beta-Peptides; D016166:Free Radical Scavengers; D008670:Metals; D010446:Peptide Fragments; D011804:Quinolines; C078592:amyloid beta-protein (1-40); C075222:amyloid beta-protein (1-42); D003300:Copper; C037219:quinoline; D005947:Glucose; D015032:Zinc