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Nitric oxide prevents H(2)O(2)-induced apoptosis in SK-N-MC human neuroblastoma cells

Nitric oxide (NO) is a cellular signaling molecule in many physiological and pathological processes including neuroprotector. Here we examined the antiapoptotic effect of NO in SK-N-MC cells. H(2)O(2) treatment (10-200 μM) induced cell death in a dose-dependent manner and pretreatment of cells with...

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Autores principales: Yoo, Yeong-Min, Jung, Eui-Man, Ahn, Changhwan, Jeung, Eui-Bae
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Ivyspring International Publisher 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6299366/
https://www.ncbi.nlm.nih.gov/pubmed/30585261
http://dx.doi.org/10.7150/ijbs.28050
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author Yoo, Yeong-Min
Jung, Eui-Man
Ahn, Changhwan
Jeung, Eui-Bae
author_facet Yoo, Yeong-Min
Jung, Eui-Man
Ahn, Changhwan
Jeung, Eui-Bae
author_sort Yoo, Yeong-Min
collection PubMed
description Nitric oxide (NO) is a cellular signaling molecule in many physiological and pathological processes including neuroprotector. Here we examined the antiapoptotic effect of NO in SK-N-MC cells. H(2)O(2) treatment (10-200 μM) induced cell death in a dose-dependent manner and pretreatment of cells with 100 μM S-nitroso-N-acetylpenicillamine (SNAP), an NO donor, attenuated the occurrence of H(2)O(2)-induced cell death. DAPI staining showed H(2)O(2)-induced nuclear fragmentation and NO treatment suppressed it. NO inhibited the proteolytic activation of caspase-3 and mitochondrial cytochrome c release. Treatment of soluble guanylyl cyclase inhibitor ODQ decreased the protective effect of SNAP on H(2)O(2)-treated cells and increased caspase 3-like enzyme activity and activation, cytochrome c release, PARP cleavage, and DNA fragmentation, indicating that cGMP is a key mediator in NO-mediated antiapoptosis. The cGMP analog 8-Br-cGMP blocked H(2)O(2)-induced apoptotic cell death; reduction of caspase-3 enzyme, cytochrome c release, and caspase-8 and -9. These preventive effects of SNAP and 8-Br-cGMP were suppressed by PKG inhibitor KT5823. Levels of PKGI, PKGII, and p-VASP proteins were increased by SNAP and 8-Br-cGMP and suppressed by KT5823 treatment. These results indicate that PKG is a downstream signal mediator in the suppression of apoptosis by NO and cGMP. Akt activation was inhibited the PI3K inhibitors LY294002 and Wortmannin, resulting in the inhibition of cell viability and increase of cytochrome c release. SNAP induced phosphorylation of Akt and Bad and then increased the interactions between 14-3-3β and p-Bad. These data suggest that the NO suppresses H(2)O(2)-induced SK-N-MC cell apoptosis by suppressing apoptosis signal mediating the interaction between 14‐3‐3β and Bad phosphorylation via PKG/PI3K/Akt.
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spelling pubmed-62993662018-12-25 Nitric oxide prevents H(2)O(2)-induced apoptosis in SK-N-MC human neuroblastoma cells Yoo, Yeong-Min Jung, Eui-Man Ahn, Changhwan Jeung, Eui-Bae Int J Biol Sci Research Paper Nitric oxide (NO) is a cellular signaling molecule in many physiological and pathological processes including neuroprotector. Here we examined the antiapoptotic effect of NO in SK-N-MC cells. H(2)O(2) treatment (10-200 μM) induced cell death in a dose-dependent manner and pretreatment of cells with 100 μM S-nitroso-N-acetylpenicillamine (SNAP), an NO donor, attenuated the occurrence of H(2)O(2)-induced cell death. DAPI staining showed H(2)O(2)-induced nuclear fragmentation and NO treatment suppressed it. NO inhibited the proteolytic activation of caspase-3 and mitochondrial cytochrome c release. Treatment of soluble guanylyl cyclase inhibitor ODQ decreased the protective effect of SNAP on H(2)O(2)-treated cells and increased caspase 3-like enzyme activity and activation, cytochrome c release, PARP cleavage, and DNA fragmentation, indicating that cGMP is a key mediator in NO-mediated antiapoptosis. The cGMP analog 8-Br-cGMP blocked H(2)O(2)-induced apoptotic cell death; reduction of caspase-3 enzyme, cytochrome c release, and caspase-8 and -9. These preventive effects of SNAP and 8-Br-cGMP were suppressed by PKG inhibitor KT5823. Levels of PKGI, PKGII, and p-VASP proteins were increased by SNAP and 8-Br-cGMP and suppressed by KT5823 treatment. These results indicate that PKG is a downstream signal mediator in the suppression of apoptosis by NO and cGMP. Akt activation was inhibited the PI3K inhibitors LY294002 and Wortmannin, resulting in the inhibition of cell viability and increase of cytochrome c release. SNAP induced phosphorylation of Akt and Bad and then increased the interactions between 14-3-3β and p-Bad. These data suggest that the NO suppresses H(2)O(2)-induced SK-N-MC cell apoptosis by suppressing apoptosis signal mediating the interaction between 14‐3‐3β and Bad phosphorylation via PKG/PI3K/Akt. Ivyspring International Publisher 2018-11-02 /pmc/articles/PMC6299366/ /pubmed/30585261 http://dx.doi.org/10.7150/ijbs.28050 Text en © Ivyspring International Publisher This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY-NC) license (https://creativecommons.org/licenses/by-nc/4.0/). See http://ivyspring.com/terms for full terms and conditions.
spellingShingle Research Paper
Yoo, Yeong-Min
Jung, Eui-Man
Ahn, Changhwan
Jeung, Eui-Bae
Nitric oxide prevents H(2)O(2)-induced apoptosis in SK-N-MC human neuroblastoma cells
title Nitric oxide prevents H(2)O(2)-induced apoptosis in SK-N-MC human neuroblastoma cells
title_full Nitric oxide prevents H(2)O(2)-induced apoptosis in SK-N-MC human neuroblastoma cells
title_fullStr Nitric oxide prevents H(2)O(2)-induced apoptosis in SK-N-MC human neuroblastoma cells
title_full_unstemmed Nitric oxide prevents H(2)O(2)-induced apoptosis in SK-N-MC human neuroblastoma cells
title_short Nitric oxide prevents H(2)O(2)-induced apoptosis in SK-N-MC human neuroblastoma cells
title_sort nitric oxide prevents h(2)o(2)-induced apoptosis in sk-n-mc human neuroblastoma cells
topic Research Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6299366/
https://www.ncbi.nlm.nih.gov/pubmed/30585261
http://dx.doi.org/10.7150/ijbs.28050
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