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Rat cortico-striatal sagittal organotypic slice cultures as ex vivo excitotoxic striatal lesion models

Organotypic brain slice cultures are a useful tool to study neurological disease as they provide a 3-dimensional system which more closely recapitulates the in vivo cytoarchitectural complexity than standard 2-dimensional in vitro cell cultures. Building on our previously developed rat brain slice c...

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Autores principales: McCaughey-Chapman, Amy, Connor, Bronwen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9525915/
https://www.ncbi.nlm.nih.gov/pubmed/36193519
http://dx.doi.org/10.1016/j.heliyon.2022.e10819
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author McCaughey-Chapman, Amy
Connor, Bronwen
author_facet McCaughey-Chapman, Amy
Connor, Bronwen
author_sort McCaughey-Chapman, Amy
collection PubMed
description Organotypic brain slice cultures are a useful tool to study neurological disease as they provide a 3-dimensional system which more closely recapitulates the in vivo cytoarchitectural complexity than standard 2-dimensional in vitro cell cultures. Building on our previously developed rat brain slice culture protocol, we have extended our findings to develop ex vivo excitotoxic lesion models by treatment of rat sagittal organotypic slices with AMPA or quinolinic acid (QA). We show that treatment of rat sagittal cortico-striatal organotypic slices with 8μM AMPA or 50μM QA causes striatal cell loss with a reduction in neuronal nuclei (NeuN)+ cells and an increase in ethidium homodimer-1 (EthD-1)+ dead cells compared to untreated slices. More specifically, following treatment with QA, we observed a reduction in medium spiny neuron DARPP32 + cells in the striatum and cortex of slices. Treatment of the slices with AMPA does not alter glial fibrillary acidic protein (GFAP) expression, while we observed an acute increase in GFAP expression 1-week post-QA exposure both in the cortex and striatum of slices. This recapitulates the excitotoxic and striatal degeneration observed in rat AMPA and QA lesion models in vivo. Our slice culture platform provides an advance over other systems with the ability to generate acute AMPA- and QA-induced striatal excitotoxicity in sagittal cortico-striatal slices which can be cultured long-term for at least 4 weeks. Our ex vivo organotypic slice culture system provides a long-term cellular platform to model neuronal excitotoxicity, with QA specifically modelling Huntington's disease. This will allow for mechanistic studies of excitotoxicity and neuroprotection, as well as the development and testing of novel therapeutic strategies with reduced cost and ease of manipulation prior to in vivo experimentation.
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spelling pubmed-95259152022-10-02 Rat cortico-striatal sagittal organotypic slice cultures as ex vivo excitotoxic striatal lesion models McCaughey-Chapman, Amy Connor, Bronwen Heliyon Research Article Organotypic brain slice cultures are a useful tool to study neurological disease as they provide a 3-dimensional system which more closely recapitulates the in vivo cytoarchitectural complexity than standard 2-dimensional in vitro cell cultures. Building on our previously developed rat brain slice culture protocol, we have extended our findings to develop ex vivo excitotoxic lesion models by treatment of rat sagittal organotypic slices with AMPA or quinolinic acid (QA). We show that treatment of rat sagittal cortico-striatal organotypic slices with 8μM AMPA or 50μM QA causes striatal cell loss with a reduction in neuronal nuclei (NeuN)+ cells and an increase in ethidium homodimer-1 (EthD-1)+ dead cells compared to untreated slices. More specifically, following treatment with QA, we observed a reduction in medium spiny neuron DARPP32 + cells in the striatum and cortex of slices. Treatment of the slices with AMPA does not alter glial fibrillary acidic protein (GFAP) expression, while we observed an acute increase in GFAP expression 1-week post-QA exposure both in the cortex and striatum of slices. This recapitulates the excitotoxic and striatal degeneration observed in rat AMPA and QA lesion models in vivo. Our slice culture platform provides an advance over other systems with the ability to generate acute AMPA- and QA-induced striatal excitotoxicity in sagittal cortico-striatal slices which can be cultured long-term for at least 4 weeks. Our ex vivo organotypic slice culture system provides a long-term cellular platform to model neuronal excitotoxicity, with QA specifically modelling Huntington's disease. This will allow for mechanistic studies of excitotoxicity and neuroprotection, as well as the development and testing of novel therapeutic strategies with reduced cost and ease of manipulation prior to in vivo experimentation. Elsevier 2022-09-28 /pmc/articles/PMC9525915/ /pubmed/36193519 http://dx.doi.org/10.1016/j.heliyon.2022.e10819 Text en © 2022 The Authors https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Research Article
McCaughey-Chapman, Amy
Connor, Bronwen
Rat cortico-striatal sagittal organotypic slice cultures as ex vivo excitotoxic striatal lesion models
title Rat cortico-striatal sagittal organotypic slice cultures as ex vivo excitotoxic striatal lesion models
title_full Rat cortico-striatal sagittal organotypic slice cultures as ex vivo excitotoxic striatal lesion models
title_fullStr Rat cortico-striatal sagittal organotypic slice cultures as ex vivo excitotoxic striatal lesion models
title_full_unstemmed Rat cortico-striatal sagittal organotypic slice cultures as ex vivo excitotoxic striatal lesion models
title_short Rat cortico-striatal sagittal organotypic slice cultures as ex vivo excitotoxic striatal lesion models
title_sort rat cortico-striatal sagittal organotypic slice cultures as ex vivo excitotoxic striatal lesion models
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9525915/
https://www.ncbi.nlm.nih.gov/pubmed/36193519
http://dx.doi.org/10.1016/j.heliyon.2022.e10819
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