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Intermediates involved in serotonin oxidation catalyzed by Cu bound Aβ peptides

The degradation of neurotransmitters is a hallmark feature of Alzheimer's disease (AD). Copper bound Aβ peptides, invoked to be involved in the pathology of AD, are found to catalyze the oxidation of serotonin (5-HT) by H(2)O(2). A combination of EPR and resonance Raman spectroscopy reveals the...

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Autores principales: Nath, Arnab Kumar, Ghatak, Arnab, Dey, Abhishek, Dey, Somdatta Ghosh
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8179298/
https://www.ncbi.nlm.nih.gov/pubmed/34163956
http://dx.doi.org/10.1039/d0sc06258h
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author Nath, Arnab Kumar
Ghatak, Arnab
Dey, Abhishek
Dey, Somdatta Ghosh
author_facet Nath, Arnab Kumar
Ghatak, Arnab
Dey, Abhishek
Dey, Somdatta Ghosh
author_sort Nath, Arnab Kumar
collection PubMed
description The degradation of neurotransmitters is a hallmark feature of Alzheimer's disease (AD). Copper bound Aβ peptides, invoked to be involved in the pathology of AD, are found to catalyze the oxidation of serotonin (5-HT) by H(2)O(2). A combination of EPR and resonance Raman spectroscopy reveals the formation of a Cu(ii)–OOH species and a dimeric, EPR silent, Cu(2)O(2) bis-μ-oxo species under the reaction conditions. The Cu(ii)–OOH species, which can be selectively formed in the presence of excess H(2)O(2), is the reactive intermediate responsible for 5-HT oxidation. H(2)O(2) produced by the reaction of O(2) with reduced Cu(i)–Aβ species can also oxidize 5-HT. Both these pathways are physiologically relevant and may be involved in the observed decay of neurotransmitters as observed in AD patients.
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spelling pubmed-81792982021-06-22 Intermediates involved in serotonin oxidation catalyzed by Cu bound Aβ peptides Nath, Arnab Kumar Ghatak, Arnab Dey, Abhishek Dey, Somdatta Ghosh Chem Sci Chemistry The degradation of neurotransmitters is a hallmark feature of Alzheimer's disease (AD). Copper bound Aβ peptides, invoked to be involved in the pathology of AD, are found to catalyze the oxidation of serotonin (5-HT) by H(2)O(2). A combination of EPR and resonance Raman spectroscopy reveals the formation of a Cu(ii)–OOH species and a dimeric, EPR silent, Cu(2)O(2) bis-μ-oxo species under the reaction conditions. The Cu(ii)–OOH species, which can be selectively formed in the presence of excess H(2)O(2), is the reactive intermediate responsible for 5-HT oxidation. H(2)O(2) produced by the reaction of O(2) with reduced Cu(i)–Aβ species can also oxidize 5-HT. Both these pathways are physiologically relevant and may be involved in the observed decay of neurotransmitters as observed in AD patients. The Royal Society of Chemistry 2020-12-22 /pmc/articles/PMC8179298/ /pubmed/34163956 http://dx.doi.org/10.1039/d0sc06258h Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Nath, Arnab Kumar
Ghatak, Arnab
Dey, Abhishek
Dey, Somdatta Ghosh
Intermediates involved in serotonin oxidation catalyzed by Cu bound Aβ peptides
title Intermediates involved in serotonin oxidation catalyzed by Cu bound Aβ peptides
title_full Intermediates involved in serotonin oxidation catalyzed by Cu bound Aβ peptides
title_fullStr Intermediates involved in serotonin oxidation catalyzed by Cu bound Aβ peptides
title_full_unstemmed Intermediates involved in serotonin oxidation catalyzed by Cu bound Aβ peptides
title_short Intermediates involved in serotonin oxidation catalyzed by Cu bound Aβ peptides
title_sort intermediates involved in serotonin oxidation catalyzed by cu bound aβ peptides
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8179298/
https://www.ncbi.nlm.nih.gov/pubmed/34163956
http://dx.doi.org/10.1039/d0sc06258h
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