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Reduced Levels of miR-342-5p in Plasma Are Associated With Worse Cognitive Evolution in Patients With Mild Alzheimer's Disease

Progressive cognitive decline is the most relevant clinical symptom of Alzheimer's disease (AD). However, the rate of cognitive decline is highly variable between patients. Synaptic deficits are the neuropathological event most correlated with cognitive impairment in AD. Considering the importa...

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Published in:Frontiers in aging neuroscience 2021-08, Vol.13, p.705989-705989
Main Authors: Dakterzada, Farida, David Benítez, Iván, Targa, Adriano, Lladó, Albert, Torres, Gerard, Romero, Leila, de Gonzalo-Calvo, David, Moncusí-Moix, Anna, Tort-Merino, Adria, Huerto, Raquel, Sánchez-de-la-Torre, Manuel, Barbé, Ferran, Piñol-Ripoll, Gerard
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creator Dakterzada, Farida
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description Progressive cognitive decline is the most relevant clinical symptom of Alzheimer's disease (AD). However, the rate of cognitive decline is highly variable between patients. Synaptic deficits are the neuropathological event most correlated with cognitive impairment in AD. Considering the important role of microRNAs (miRNAs) in regulating synaptic plasticity, our objective was to identify the plasma miRNAs associated with the rate of cognitive decline in patients with mild AD. We analyzed 754 plasma miRNAs from 19 women diagnosed with mild AD using TaqMan low-density array cards. The patients were grouped based on the rate of decline in the MMSE score after 2 years [
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However, the rate of cognitive decline is highly variable between patients. Synaptic deficits are the neuropathological event most correlated with cognitive impairment in AD. Considering the important role of microRNAs (miRNAs) in regulating synaptic plasticity, our objective was to identify the plasma miRNAs associated with the rate of cognitive decline in patients with mild AD. We analyzed 754 plasma miRNAs from 19 women diagnosed with mild AD using TaqMan low-density array cards. The patients were grouped based on the rate of decline in the MMSE score after 2 years [&lt;4 points ( = 11) and ≥4 points ( = 8)]. The differentially expressed miRNAs between the two groups were validated in an independent cohort of men and women ( = 53) with mild AD using RT-qPCR. In the discovery cohort, 17 miRNAs were differentially expressed according to the fold change between patients with faster declines in cognition and those with slower declines. miR-342-5p demonstrated differential expression between the groups and a good correlation with the rate of cognitive decline in the validation cohort ( = -0.28; = 0.026). This miRNA had a lower expression level in patients who suffered from more severe decline than in those who were cognitively more stable after 2 years ( = 0.049). Lower levels of miR-342-5p in plasma were associated with faster cognitive decline in patients with mild AD after 2 years of follow-up.</description><identifier>ISSN: 1663-4365</identifier><identifier>EISSN: 1663-4365</identifier><identifier>DOI: 10.3389/fnagi.2021.705989</identifier><identifier>PMID: 34497505</identifier><language>eng</language><publisher>Switzerland: Frontiers Research Foundation</publisher><subject>Alzheimer's disease ; Binding sites ; biomarker ; Biomarkers ; Cognition &amp; reasoning ; Cognitive ability ; cognitive decline ; Hospitals ; Memory ; MicroRNAs ; miR-342-5p ; miRNA ; Neurodegenerative diseases ; Neuropathology ; Neuroscience ; Patients ; Plasma ; Proteins ; Questionnaires ; Synaptic plasticity ; Womens health</subject><ispartof>Frontiers in aging neuroscience, 2021-08, Vol.13, p.705989-705989</ispartof><rights>Copyright © 2021 Dakterzada, David Benítez, Targa, Lladó, Torres, Romero, de Gonzalo-Calvo, Moncusí-Moix, Tort-Merino, Huerto, Sánchez-de-la-Torre, Barbé and Piñol-Ripoll.</rights><rights>2021. 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subjects Alzheimer's disease
Binding sites
biomarker
Biomarkers
Cognition & reasoning
Cognitive ability
cognitive decline
Hospitals
Memory
MicroRNAs
miR-342-5p
miRNA
Neurodegenerative diseases
Neuropathology
Neuroscience
Patients
Plasma
Proteins
Questionnaires
Synaptic plasticity
Womens health
title Reduced Levels of miR-342-5p in Plasma Are Associated With Worse Cognitive Evolution in Patients With Mild Alzheimer's Disease
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