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Visual evoked potentials waveform analysis to measure intracortical damage in a preclinical model of multiple sclerosis
INTRODUCTION: Visual evoked potentials (VEPs) are a non-invasive technique routinely used in clinical and preclinical practice. Discussion about inclusion of VEPs in McDonald criteria, used for Multiple Sclerosis (MS) diagnosis, increased the importance of VEP in MS preclinical models. While the int...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Frontiers Media S.A.
2023
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10264580/ https://www.ncbi.nlm.nih.gov/pubmed/37323584 http://dx.doi.org/10.3389/fncel.2023.1186110 |
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author | Marenna, Silvia Rossi, Elena Huang, Su-Chun Castoldi, Valerio Comi, Giancarlo Leocani, Letizia |
author_facet | Marenna, Silvia Rossi, Elena Huang, Su-Chun Castoldi, Valerio Comi, Giancarlo Leocani, Letizia |
author_sort | Marenna, Silvia |
collection | PubMed |
description | INTRODUCTION: Visual evoked potentials (VEPs) are a non-invasive technique routinely used in clinical and preclinical practice. Discussion about inclusion of VEPs in McDonald criteria, used for Multiple Sclerosis (MS) diagnosis, increased the importance of VEP in MS preclinical models. While the interpretation of the N1 peak is recognized, less is known about the first and second positive VEP peaks, P1 and P2, and the implicit time of the different segments. Our hypothesis is that P2 latency delay describes intracortical neurophysiological dysfunction from the visual cortex to the other cortical areas. METHODS: In this work, we analyzed VEP traces that were included in our two recently published papers on Experimental Autoimmune Encephalomyelitis (EAE) mouse model. Compared with these previous publications other VEP peaks, P1 and P2, and the implicit time of components P1-N1, N1-P2 and P1-P2, were analyzed in blind. RESULTS: Latencies of P2, P1-P2, P1-N1 and N1-P2 were increased in all EAE mice, including group without N1 latency change delay at early time points. In particular, at 7 dpi the P2 latency delay change was significantly higher compared with N1 latency change delay. Moreover, new analysis of these VEP components under the influence of neurostimulation revealed a decrease in P2 delay in stimulated animals. DISCUSSION: P2 latency delay, P1-P2, P1-N1, and N1-P2 latency changes which reflect intracortical dysfunction, were consistently detected across all EAE groups before N1 change. Results underline the importance of analyzing all VEP components for a complete overview of the neurophysiological visual pathway dysfunction and treatment efficacy. |
format | Online Article Text |
id | pubmed-10264580 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-102645802023-06-15 Visual evoked potentials waveform analysis to measure intracortical damage in a preclinical model of multiple sclerosis Marenna, Silvia Rossi, Elena Huang, Su-Chun Castoldi, Valerio Comi, Giancarlo Leocani, Letizia Front Cell Neurosci Neuroscience INTRODUCTION: Visual evoked potentials (VEPs) are a non-invasive technique routinely used in clinical and preclinical practice. Discussion about inclusion of VEPs in McDonald criteria, used for Multiple Sclerosis (MS) diagnosis, increased the importance of VEP in MS preclinical models. While the interpretation of the N1 peak is recognized, less is known about the first and second positive VEP peaks, P1 and P2, and the implicit time of the different segments. Our hypothesis is that P2 latency delay describes intracortical neurophysiological dysfunction from the visual cortex to the other cortical areas. METHODS: In this work, we analyzed VEP traces that were included in our two recently published papers on Experimental Autoimmune Encephalomyelitis (EAE) mouse model. Compared with these previous publications other VEP peaks, P1 and P2, and the implicit time of components P1-N1, N1-P2 and P1-P2, were analyzed in blind. RESULTS: Latencies of P2, P1-P2, P1-N1 and N1-P2 were increased in all EAE mice, including group without N1 latency change delay at early time points. In particular, at 7 dpi the P2 latency delay change was significantly higher compared with N1 latency change delay. Moreover, new analysis of these VEP components under the influence of neurostimulation revealed a decrease in P2 delay in stimulated animals. DISCUSSION: P2 latency delay, P1-P2, P1-N1, and N1-P2 latency changes which reflect intracortical dysfunction, were consistently detected across all EAE groups before N1 change. Results underline the importance of analyzing all VEP components for a complete overview of the neurophysiological visual pathway dysfunction and treatment efficacy. Frontiers Media S.A. 2023-05-31 /pmc/articles/PMC10264580/ /pubmed/37323584 http://dx.doi.org/10.3389/fncel.2023.1186110 Text en Copyright © 2023 Marenna, Rossi, Huang, Castoldi, Comi and Leocani. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Neuroscience Marenna, Silvia Rossi, Elena Huang, Su-Chun Castoldi, Valerio Comi, Giancarlo Leocani, Letizia Visual evoked potentials waveform analysis to measure intracortical damage in a preclinical model of multiple sclerosis |
title | Visual evoked potentials waveform analysis to measure intracortical damage in a preclinical model of multiple sclerosis |
title_full | Visual evoked potentials waveform analysis to measure intracortical damage in a preclinical model of multiple sclerosis |
title_fullStr | Visual evoked potentials waveform analysis to measure intracortical damage in a preclinical model of multiple sclerosis |
title_full_unstemmed | Visual evoked potentials waveform analysis to measure intracortical damage in a preclinical model of multiple sclerosis |
title_short | Visual evoked potentials waveform analysis to measure intracortical damage in a preclinical model of multiple sclerosis |
title_sort | visual evoked potentials waveform analysis to measure intracortical damage in a preclinical model of multiple sclerosis |
topic | Neuroscience |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10264580/ https://www.ncbi.nlm.nih.gov/pubmed/37323584 http://dx.doi.org/10.3389/fncel.2023.1186110 |
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