| Autor: |
Florio D; Department of Pharmacy, University of Naples Federico II, 80131 Naples, Italy., Annunziata A; Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy.; Department of Chemical, Materials, and Industrial Production Engineering (DICMaPI), University of Naples Federico II, 80125 Naples, Italy., Panzetta V; Department of Chemical, Materials, and Industrial Production Engineering (DICMaPI), University of Naples Federico II, 80125 Naples, Italy.; Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples Federico II, Istituto Italiano di Tecnologia, 80125 Naples, Italy., Netti PA; Department of Chemical, Materials, and Industrial Production Engineering (DICMaPI), University of Naples Federico II, 80125 Naples, Italy.; Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples Federico II, Istituto Italiano di Tecnologia, 80125 Naples, Italy., Ruffo F; Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy., Marasco D; Department of Pharmacy, University of Naples Federico II, 80131 Naples, Italy. |
| Abstrakt: |
Inorganic medicinal compounds represent a unique and versatile source of potential therapeutics in many diseases and, more recently, in neurodegeneration. Herein we investigated the effects of two η 6 -arene Ru(II) complexes on the self-aggregation processes of several amyloidogenic peptides endowed with different kinetics and primary sequences. The Ru(II) complexes exhibit, around the metal ion, two chlorides, one NHC = N -heterocyclic carbene, with a glucosyl and a methyl substituent and separately a hexamethylbenzene, which is named Ru1 , and one benzene, named Ru2 . Both complexes were demonstrated to bind monomeric amyloids suppressing aggregation as evidenced in thioflavin T (ThT) binding assays and autofluorescence experiments. Electrospray ionization mass spectrometry (ESI-MS) indicated the formation of direct adducts between amyloid and metal complexes, which determined the marked conformational variation of peptides and a rescue of cellular viability in SH-SY5Y cells. The complex Ru2 was demonstrated to be a more potent inhibitor of amyloid aggregation compared to Ru1 likely because of the less hindrance of the arene moiety. The presented data strongly support the in vitro ability of η 6 -arene Ru(II) complexes to suppress amyloid aggregation, providing insights into their potential application as novel therapeutics in neurodegenerative diseases. |
