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2016-06-01

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cc-by-nc-nd (c) Elsevier B.V., 2016
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/148556

Redox proteomic profiling of neuroketal-adducted proteins in human brain: regional vulnerability at middle age increases in the elderly

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https://doi.org/10.1016/j.freeradbiomed.2016.02.034

Abstract

Protein lipoxidation was assessed in the parietal cortex (PC), frontal cortex (FC), and cingulate gyrus (CG) in middle-aged and old-aged individuals with no clinical manifestations of cognitive impairment, in order to increase understanding of regional brain vulnerability to oxidative damage during aging. Twenty-five lipoxidized proteins were identified in all the three regions although with regional specificities, by using redox proteomics to detect target proteins of neuroketals (NKT) adduction. The number of cases with NKT-adducted proteins was higher in old-aged individuals but most oxidized proteins were already present in middle-aged individuals. Differences in vulnerability to oxidation were dependent on the sub-cellular localization, secondary structure, and external exposition of certain amino acids. Lipoxidized proteins included those involved in energy metabolism, cytoskeleton, proteostasis, neurotransmission and O2/CO2, and heme metabolism. Total NKT and soluble oligomer levels were estimated employing slot-blot, and these were compared between age groups. Oligomers increased with age in PC and FC; NKT significantly increased with age in FC, whereas total NKT and oligomer levels were not modified in CG, thus highlighting differences in brain regional vulnerability with age. Oligomers significantly correlated with NKT levels in the three cortical regions, suggesting that protein NKT adduction parallels soluble oligomer formation.

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Envelliment, Genètica, Lípids, Peroxidació, Teixit nerviós, Estrès oxidatiu

Subject (English)

Aging, Genetics, Lipids, Peroxidation, Nerve tissue, Oxidative stress

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Articles publicats en revistes (Patologia i Terapèutica Experimental)
Articles publicats en revistes (Institut d'lnvestigació Biomèdica de Bellvitge (IDIBELL))

Citation

DOMÍNGUEZ GONZÁLEZ, Mayelín, et al. Redox proteomic profiling of neuroketal-adducted proteins in human brain: regional vulnerability at middle age increases in the elderly. Free Radical Biology and Medicine. 2016. Vol. 95, num. 1-15. ISSN 0891-5849. [consulted: 16 of August of 2026]. Available at: https://hdl.handle.net/2445/148556

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