Oxidative Stress and Alterations in the Antioxidative Defense System in Neuronal Cells Derived from NPC1 Patient-Specific Induced Pluripotent Stem Cells
Oxidative stress (OS) represents a state of an imbalanced amount of reactive oxygen species (ROS) and/or a hampered efficacy of the antioxidative defense system. Cells of the central nervous system are particularly sensitive to OS, as they have a massive need of oxygen to maintain proper function. C...
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doaj-0d54cd79820a4a4abe998bd004b1538a2020-11-25T03:55:40ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672020-10-01217667766710.3390/ijms21207667Oxidative Stress and Alterations in the Antioxidative Defense System in Neuronal Cells Derived from NPC1 Patient-Specific Induced Pluripotent Stem CellsAlexandra V. Jürs0Christin Völkner1Maik Liedtke2Katharina Huth3Jan Lukas4Andreas Hermann5Moritz J. Frech6Translational Neurodegeneration Section Albrecht Kossel, Department of Neurology, University Medical Center Rostock, University of Rostock, 18147 Rostock, GermanyTranslational Neurodegeneration Section Albrecht Kossel, Department of Neurology, University Medical Center Rostock, University of Rostock, 18147 Rostock, GermanyTranslational Neurodegeneration Section Albrecht Kossel, Department of Neurology, University Medical Center Rostock, University of Rostock, 18147 Rostock, GermanyTranslational Neurodegeneration Section Albrecht Kossel, Department of Neurology, University Medical Center Rostock, University of Rostock, 18147 Rostock, GermanyTranslational Neurodegeneration Section Albrecht Kossel, Department of Neurology, University Medical Center Rostock, University of Rostock, 18147 Rostock, GermanyTranslational Neurodegeneration Section Albrecht Kossel, Department of Neurology, University Medical Center Rostock, University of Rostock, 18147 Rostock, GermanyTranslational Neurodegeneration Section Albrecht Kossel, Department of Neurology, University Medical Center Rostock, University of Rostock, 18147 Rostock, GermanyOxidative stress (OS) represents a state of an imbalanced amount of reactive oxygen species (ROS) and/or a hampered efficacy of the antioxidative defense system. Cells of the central nervous system are particularly sensitive to OS, as they have a massive need of oxygen to maintain proper function. Consequently, OS represents a common pathophysiological hallmark of neurodegenerative diseases and is discussed to contribute to the neurodegeneration observed amongst others in Alzheimer’s disease and Parkinson’s disease. In this context, accumulating evidence suggests that OS is involved in the pathophysiology of Niemann-Pick type C1 disease (NPC1). NPC1, a rare hereditary neurodegenerative disease, belongs to the family of lysosomal storage disorders. A major hallmark of the disease is the accumulation of cholesterol and other glycosphingolipids in lysosomes. Several studies describe OS both in murine in vivo and in vitro NPC1 models. However, studies based on human cells are limited to NPC1 patient-derived fibroblasts. Thus, we analyzed OS in a human neuronal model based on NPC1 patient-specific induced pluripotent stem cells (iPSCs). Higher ROS levels, as determined by DCF (dichlorodihydrofluorescein) fluorescence, indicated oxidative stress in all NPC1-deficient cell lines. This finding was further supported by reduced superoxide dismutase (SOD) activity. The analysis of mRNA and protein levels of SOD1 and SOD2 did not reveal any difference between control cells and NPC1-deficient cells. Interestingly, we observed a striking decrease in catalase mRNA and protein levels in all NPC1-deficient cell lines. As catalase is a key enzyme of the cellular antioxidative defense system, we concluded that the lack of catalase contributes to the elevated ROS levels observed in NPC1-deficient cells. Thus, a restitution of a physiological catalase level may pose an intervention strategy to rescue NPC1-deficient cells from the repercussions of oxidative stress contributing to the neurodegeneration observed in NPC1.https://www.mdpi.com/1422-0067/21/20/7667NPC1ROScatalaseSOD1SOD2iPSC |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Alexandra V. Jürs Christin Völkner Maik Liedtke Katharina Huth Jan Lukas Andreas Hermann Moritz J. Frech |
spellingShingle |
Alexandra V. Jürs Christin Völkner Maik Liedtke Katharina Huth Jan Lukas Andreas Hermann Moritz J. Frech Oxidative Stress and Alterations in the Antioxidative Defense System in Neuronal Cells Derived from NPC1 Patient-Specific Induced Pluripotent Stem Cells International Journal of Molecular Sciences NPC1 ROS catalase SOD1 SOD2 iPSC |
author_facet |
Alexandra V. Jürs Christin Völkner Maik Liedtke Katharina Huth Jan Lukas Andreas Hermann Moritz J. Frech |
author_sort |
Alexandra V. Jürs |
title |
Oxidative Stress and Alterations in the Antioxidative Defense System in Neuronal Cells Derived from NPC1 Patient-Specific Induced Pluripotent Stem Cells |
title_short |
Oxidative Stress and Alterations in the Antioxidative Defense System in Neuronal Cells Derived from NPC1 Patient-Specific Induced Pluripotent Stem Cells |
title_full |
Oxidative Stress and Alterations in the Antioxidative Defense System in Neuronal Cells Derived from NPC1 Patient-Specific Induced Pluripotent Stem Cells |
title_fullStr |
Oxidative Stress and Alterations in the Antioxidative Defense System in Neuronal Cells Derived from NPC1 Patient-Specific Induced Pluripotent Stem Cells |
title_full_unstemmed |
Oxidative Stress and Alterations in the Antioxidative Defense System in Neuronal Cells Derived from NPC1 Patient-Specific Induced Pluripotent Stem Cells |
title_sort |
oxidative stress and alterations in the antioxidative defense system in neuronal cells derived from npc1 patient-specific induced pluripotent stem cells |
publisher |
MDPI AG |
series |
International Journal of Molecular Sciences |
issn |
1661-6596 1422-0067 |
publishDate |
2020-10-01 |
description |
Oxidative stress (OS) represents a state of an imbalanced amount of reactive oxygen species (ROS) and/or a hampered efficacy of the antioxidative defense system. Cells of the central nervous system are particularly sensitive to OS, as they have a massive need of oxygen to maintain proper function. Consequently, OS represents a common pathophysiological hallmark of neurodegenerative diseases and is discussed to contribute to the neurodegeneration observed amongst others in Alzheimer’s disease and Parkinson’s disease. In this context, accumulating evidence suggests that OS is involved in the pathophysiology of Niemann-Pick type C1 disease (NPC1). NPC1, a rare hereditary neurodegenerative disease, belongs to the family of lysosomal storage disorders. A major hallmark of the disease is the accumulation of cholesterol and other glycosphingolipids in lysosomes. Several studies describe OS both in murine in vivo and in vitro NPC1 models. However, studies based on human cells are limited to NPC1 patient-derived fibroblasts. Thus, we analyzed OS in a human neuronal model based on NPC1 patient-specific induced pluripotent stem cells (iPSCs). Higher ROS levels, as determined by DCF (dichlorodihydrofluorescein) fluorescence, indicated oxidative stress in all NPC1-deficient cell lines. This finding was further supported by reduced superoxide dismutase (SOD) activity. The analysis of mRNA and protein levels of SOD1 and SOD2 did not reveal any difference between control cells and NPC1-deficient cells. Interestingly, we observed a striking decrease in catalase mRNA and protein levels in all NPC1-deficient cell lines. As catalase is a key enzyme of the cellular antioxidative defense system, we concluded that the lack of catalase contributes to the elevated ROS levels observed in NPC1-deficient cells. Thus, a restitution of a physiological catalase level may pose an intervention strategy to rescue NPC1-deficient cells from the repercussions of oxidative stress contributing to the neurodegeneration observed in NPC1. |
topic |
NPC1 ROS catalase SOD1 SOD2 iPSC |
url |
https://www.mdpi.com/1422-0067/21/20/7667 |
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