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Bag-1 Protects Nucleus Pulposus Cells from Oxidative Stress by Interacting with HSP70
Bcl-2-associated athanogene 1 (Bag-1) is a multifunctional prosurvival protein that binds to several intracellular targets and promotes cell survival. HSP70 and Raf-1 are important targets of Bag-1; however, the protective function of Bag-1 in nucleus pulposus (NP) cells remains unclear. In this stu...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10045753/ https://www.ncbi.nlm.nih.gov/pubmed/36979842 http://dx.doi.org/10.3390/biomedicines11030863 |
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author | Suyama, Kaori Sakai, Daisuke Hayashi, Shogo Qu, Ning Terayama, Hayato Kiyoshima, Daisuke Nagahori, Kenta Watanabe, Masahiko |
author_facet | Suyama, Kaori Sakai, Daisuke Hayashi, Shogo Qu, Ning Terayama, Hayato Kiyoshima, Daisuke Nagahori, Kenta Watanabe, Masahiko |
author_sort | Suyama, Kaori |
collection | PubMed |
description | Bcl-2-associated athanogene 1 (Bag-1) is a multifunctional prosurvival protein that binds to several intracellular targets and promotes cell survival. HSP70 and Raf-1 are important targets of Bag-1; however, the protective function of Bag-1 in nucleus pulposus (NP) cells remains unclear. In this study, we determined the effects of Bag-1 on NP cells under oxidative stress induced by treatment with hydrogen peroxide (H(2)O(2)). We found that Bag-1 was bound to HSP70, but Bag-1–Raf1 binding did not occur in NP cells. Bag-1 overexpression in NP cells enhanced cell viability and mitochondrial function and significantly suppressed p38/MAPKs phosphorylation during oxidative stress, although NP cells treated with a Bag-1 C-terminal inhibitor, which is the binding site of HSP70 and Raf-1, decreased cell viability and mitochondrial function during oxidative stress. Furthermore, the phosphorylation of the ERK/MAPKs was significantly increased in Bag-1 C-terminal inhibitor-treated NP cells without H(2)O(2) treatment but did not change with H(2)O(2) exposure. The phosphorylation of Raf-1 was not influenced by Bag-1 overexpression or Bag-1 C-terminal binding site inhibition. Overall, the results suggest that Bag-1 preferentially interacts with HSP70, rather than Raf-1, to protect NP cells against oxidative stress. |
format | Online Article Text |
id | pubmed-10045753 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-100457532023-03-29 Bag-1 Protects Nucleus Pulposus Cells from Oxidative Stress by Interacting with HSP70 Suyama, Kaori Sakai, Daisuke Hayashi, Shogo Qu, Ning Terayama, Hayato Kiyoshima, Daisuke Nagahori, Kenta Watanabe, Masahiko Biomedicines Article Bcl-2-associated athanogene 1 (Bag-1) is a multifunctional prosurvival protein that binds to several intracellular targets and promotes cell survival. HSP70 and Raf-1 are important targets of Bag-1; however, the protective function of Bag-1 in nucleus pulposus (NP) cells remains unclear. In this study, we determined the effects of Bag-1 on NP cells under oxidative stress induced by treatment with hydrogen peroxide (H(2)O(2)). We found that Bag-1 was bound to HSP70, but Bag-1–Raf1 binding did not occur in NP cells. Bag-1 overexpression in NP cells enhanced cell viability and mitochondrial function and significantly suppressed p38/MAPKs phosphorylation during oxidative stress, although NP cells treated with a Bag-1 C-terminal inhibitor, which is the binding site of HSP70 and Raf-1, decreased cell viability and mitochondrial function during oxidative stress. Furthermore, the phosphorylation of the ERK/MAPKs was significantly increased in Bag-1 C-terminal inhibitor-treated NP cells without H(2)O(2) treatment but did not change with H(2)O(2) exposure. The phosphorylation of Raf-1 was not influenced by Bag-1 overexpression or Bag-1 C-terminal binding site inhibition. Overall, the results suggest that Bag-1 preferentially interacts with HSP70, rather than Raf-1, to protect NP cells against oxidative stress. MDPI 2023-03-12 /pmc/articles/PMC10045753/ /pubmed/36979842 http://dx.doi.org/10.3390/biomedicines11030863 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Suyama, Kaori Sakai, Daisuke Hayashi, Shogo Qu, Ning Terayama, Hayato Kiyoshima, Daisuke Nagahori, Kenta Watanabe, Masahiko Bag-1 Protects Nucleus Pulposus Cells from Oxidative Stress by Interacting with HSP70 |
title | Bag-1 Protects Nucleus Pulposus Cells from Oxidative Stress by Interacting with HSP70 |
title_full | Bag-1 Protects Nucleus Pulposus Cells from Oxidative Stress by Interacting with HSP70 |
title_fullStr | Bag-1 Protects Nucleus Pulposus Cells from Oxidative Stress by Interacting with HSP70 |
title_full_unstemmed | Bag-1 Protects Nucleus Pulposus Cells from Oxidative Stress by Interacting with HSP70 |
title_short | Bag-1 Protects Nucleus Pulposus Cells from Oxidative Stress by Interacting with HSP70 |
title_sort | bag-1 protects nucleus pulposus cells from oxidative stress by interacting with hsp70 |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10045753/ https://www.ncbi.nlm.nih.gov/pubmed/36979842 http://dx.doi.org/10.3390/biomedicines11030863 |
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