title: Unraveling amyloid toxicity pathway in NIH3T3 cells by a combined proteomic and 1 H-NMR metabonomic approach.
abstract: A range of debilitating human diseases is known to be associated with the formation of stable highly organized protein aggregates known as amyloid fibrils. The early prefibrillar aggregates behave as cytotoxic agents and their toxicity appears to result from an intrinsic ability to impair fundamental cellular processes by interacting with cellular membranes, causing oxidative stress and increase in free Ca(2+) that lead to apoptotic or necrotic cell death. However, specific signaling pathways that underlie amyloid pathogenicity remain still unclear. This work aimed to clarify cell impairment induced by amyloid aggregated. To this end, we used a combined proteomic and one-dimensional (1) H-NMR approach on NIH-3T3 cells exposed to prefibrillar aggregates from the amyloidogenic apomyoglobin mutant W7FW14F. The results indicated that cell exposure to prefibrillar aggregates induces changes of the expression level of proteins and metabolites involved in stress response. The majority of the proteins and metabolites detected are reported to be related to oxidative stress, perturbation of calcium homeostasis, apoptotic and survival pathways, and membrane damage. In conclusion, the combined proteomic and (1) H-NMR metabonomic approach, described in this study, contributes to unveil novel proteins and metabolites that could take part to the general framework of the toxicity induced by amyloid aggregates. These findings offer new insights in therapeutic and diagnostic opportunities.
authors.affiliation: Laboratory of Mass Spectrometry and Proteomics, Institute of Protein Biochemistry-CNR, Naples, Italy.
authors.forename: Annalisa
authors.initials: A
authors.lastname: Vilasi
authors.forename: Silvia
authors.initials: S
authors.lastname: Vilasi
authors.forename: Rocco
authors.initials: R
authors.lastname: Romano
authors.forename: Fausto
authors.initials: F
authors.lastname: Acernese
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Barone
authors.forename: Maria Luisa
authors.initials: ML
authors.lastname: Balestrieri
authors.forename: Rosa
authors.initials: R
authors.lastname: Maritato
authors.forename: Gaetano
authors.initials: G
authors.lastname: Irace
authors.forename: Ivana
authors.initials: I
authors.lastname: Sirangelo
mesh_terms: D000682:Amyloid / Q000378:metabolism / Q000633:toxicity*; D000818:Animals; D015153:Blotting, Western; D015180:Electrophoresis, Gel, Two-Dimensional; D005347:Fibroblasts / Q000187:drug effects* / Q000378:metabolism / Q000473:pathology; D009682:Magnetic Resonance Spectroscopy; D055432:Metabolomics / Q000379:methods*; D051379:Mice; D041681:NIH 3T3 Cells; D040901:Proteomics / Q000379:methods*; D015203:Reproducibility of Results; D015398:Signal Transduction / Q000187:drug effects; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
chemical_list: D000682:Amyloid