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Txnip expression promotes JNK-mediated neuronal death in response to reactive oxygen species

TXNIP is a protein sensitive to oxidant conditions whose expression is related to the progression of death in cancer, diabetes, ischemia, and neurodegenerative diseases, among others. Because of this, many studies propose TXNIP as a therapeutic target in several diseases. Exposure of cerebellar gran...

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Autores principales: García-Hernández, Brenda, Morán, Julio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10397383/
https://www.ncbi.nlm.nih.gov/pubmed/37547922
http://dx.doi.org/10.3389/fnmol.2023.1210962
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author García-Hernández, Brenda
Morán, Julio
author_facet García-Hernández, Brenda
Morán, Julio
author_sort García-Hernández, Brenda
collection PubMed
description TXNIP is a protein sensitive to oxidant conditions whose expression is related to the progression of death in cancer, diabetes, ischemia, and neurodegenerative diseases, among others. Because of this, many studies propose TXNIP as a therapeutic target in several diseases. Exposure of cerebellar granule neurons to staurosporine or low potassium leads to apoptotic death. Both conditions generate an early production of reactive oxygen species (ROS) that induces the activation of the ASK1 pathway and the apoptotic machinery. In these models, it has been shown an increase in TXNIP protein mediated by ROS. Here, we evaluated the molecular mechanisms involved in the regulation of the Txnip expression during neuronal death, as well as the role of the protein in the progression of cell death induced by these two apoptotic conditions. In cultured cerebellar granule neurons, we observed that low potassium and staurosporine induced an early increase in ROS that correlated with an increase in Txnip mRNA. When we evaluated the promoter of the gene, we found that the JASPAR-reported FOXO1/3 transcription factor motifs are close to the transcription start site (TSS). We then verified through the Chromatin immunoprecipitation technique (ChIP) that FOXO3 interacts with the Txnip promoter after 1 h of low potassium treatment. We also detected FOXO3 nuclear translocation by low potassium and staurosporine treatments. Finally, by using shRNA in the neuroblastoma MSN cell line, we found that Txnip downregulation decreased neuronal death induced by staurosporine stimulus. Together, these results suggest that ROS promotes the expression of Txnip through the activation of the FOXO3 transcription factor mediated by Akt inhibition. We also demonstrated that TXNIP is necessary for neuronal death progression.
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spelling pubmed-103973832023-08-04 Txnip expression promotes JNK-mediated neuronal death in response to reactive oxygen species García-Hernández, Brenda Morán, Julio Front Mol Neurosci Molecular Neuroscience TXNIP is a protein sensitive to oxidant conditions whose expression is related to the progression of death in cancer, diabetes, ischemia, and neurodegenerative diseases, among others. Because of this, many studies propose TXNIP as a therapeutic target in several diseases. Exposure of cerebellar granule neurons to staurosporine or low potassium leads to apoptotic death. Both conditions generate an early production of reactive oxygen species (ROS) that induces the activation of the ASK1 pathway and the apoptotic machinery. In these models, it has been shown an increase in TXNIP protein mediated by ROS. Here, we evaluated the molecular mechanisms involved in the regulation of the Txnip expression during neuronal death, as well as the role of the protein in the progression of cell death induced by these two apoptotic conditions. In cultured cerebellar granule neurons, we observed that low potassium and staurosporine induced an early increase in ROS that correlated with an increase in Txnip mRNA. When we evaluated the promoter of the gene, we found that the JASPAR-reported FOXO1/3 transcription factor motifs are close to the transcription start site (TSS). We then verified through the Chromatin immunoprecipitation technique (ChIP) that FOXO3 interacts with the Txnip promoter after 1 h of low potassium treatment. We also detected FOXO3 nuclear translocation by low potassium and staurosporine treatments. Finally, by using shRNA in the neuroblastoma MSN cell line, we found that Txnip downregulation decreased neuronal death induced by staurosporine stimulus. Together, these results suggest that ROS promotes the expression of Txnip through the activation of the FOXO3 transcription factor mediated by Akt inhibition. We also demonstrated that TXNIP is necessary for neuronal death progression. Frontiers Media S.A. 2023-07-20 /pmc/articles/PMC10397383/ /pubmed/37547922 http://dx.doi.org/10.3389/fnmol.2023.1210962 Text en Copyright © 2023 García-Hernández and Morán. 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 Molecular Neuroscience
García-Hernández, Brenda
Morán, Julio
Txnip expression promotes JNK-mediated neuronal death in response to reactive oxygen species
title Txnip expression promotes JNK-mediated neuronal death in response to reactive oxygen species
title_full Txnip expression promotes JNK-mediated neuronal death in response to reactive oxygen species
title_fullStr Txnip expression promotes JNK-mediated neuronal death in response to reactive oxygen species
title_full_unstemmed Txnip expression promotes JNK-mediated neuronal death in response to reactive oxygen species
title_short Txnip expression promotes JNK-mediated neuronal death in response to reactive oxygen species
title_sort txnip expression promotes jnk-mediated neuronal death in response to reactive oxygen species
topic Molecular Neuroscience
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10397383/
https://www.ncbi.nlm.nih.gov/pubmed/37547922
http://dx.doi.org/10.3389/fnmol.2023.1210962
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