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Chromobox homolog 4 overexpression inhibits TNF-α-induced matrix catabolism and senescence by suppressing activation of NF-κB signaling pathway in nucleus pulposus cells: CBX4 overexpression inhibits TNF-α-induced matrix catabolism and senescence
Intervertebral disc degeneration (IDD) is featured as enhanced catabolism of extracellular matrix (ECM) in the nucleus pulposus (NP), in which tumor necrosis factor-alpha (TNF-α)-related cell senescence is involved. Chromobox homolog protein 4 (CBX4) exhibits anti-inflammatory effects and shows prom...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9828005/ https://www.ncbi.nlm.nih.gov/pubmed/35880565 http://dx.doi.org/10.3724/abbs.2022063 |
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author | Zhang, Yangyang Li, Shuangxing Hong, Junmin Yan, Jiansen Huang, Zhengqi Wu, Jiajun Deng, Zhihuai Qin, Tianyu Xu, Kang Ye, Wei |
author_facet | Zhang, Yangyang Li, Shuangxing Hong, Junmin Yan, Jiansen Huang, Zhengqi Wu, Jiajun Deng, Zhihuai Qin, Tianyu Xu, Kang Ye, Wei |
author_sort | Zhang, Yangyang |
collection | PubMed |
description | Intervertebral disc degeneration (IDD) is featured as enhanced catabolism of extracellular matrix (ECM) in the nucleus pulposus (NP), in which tumor necrosis factor-alpha (TNF-α)-related cell senescence is involved. Chromobox homolog protein 4 (CBX4) exhibits anti-inflammatory effects and shows promising therapeutic potential. Thus, in the present study, we explore the role of CBX4 in IDD. Immunohistochemistry staining reveals that CBX4 expression is decreased in severe degenerative NP tissues compared to mild degenerative tissues, and real-time PCR and western blot analysis results show that CBX4 expression is downregulated under TNF-α stimulation in NP cells. siRNA and adenoviruses are used to knockdown or overexpress CBX4, respectively. The results demonstrate that CBX4 knockdown augments the catabolism of ECM in human NP cells, while CBX4 overexpression in rat NP cells restores the ECM degradation induced by TNF-α, as illustrated by immunofluorescence and western blot analysis. In addition, transcriptome sequencing results reveal the regulatory effect of CBX4 on the cell cycle, and further western blot analysis and senescence-associated β-galactosidase staining assay indicate that CBX4 overexpression alleviates cell senescence in the presence of TNF-α. Moreover, the phosphorylation of p65, which indicates the activation of NF-κB signaling, is measured by western blot analysis and immunofluorescence assay, and the results reveal that CBX4 overexpression reduces the TNF-α-induced increase in the p-p65/p65 ratio. In addition, the effect of CBX4 overexpression in NP cells is suppressed by NF-κB agonist. In summary, our results indicate that CBX4 overexpression can suppress TNF-α-induced matrix catabolism and cell senescence in the NP by inhibiting NF-κB activation. This study may provide new approaches for preventing and treating IDD. |
format | Online Article Text |
id | pubmed-9828005 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-98280052023-02-10 Chromobox homolog 4 overexpression inhibits TNF-α-induced matrix catabolism and senescence by suppressing activation of NF-κB signaling pathway in nucleus pulposus cells: CBX4 overexpression inhibits TNF-α-induced matrix catabolism and senescence Zhang, Yangyang Li, Shuangxing Hong, Junmin Yan, Jiansen Huang, Zhengqi Wu, Jiajun Deng, Zhihuai Qin, Tianyu Xu, Kang Ye, Wei Acta Biochim Biophys Sin (Shanghai) Research Article Intervertebral disc degeneration (IDD) is featured as enhanced catabolism of extracellular matrix (ECM) in the nucleus pulposus (NP), in which tumor necrosis factor-alpha (TNF-α)-related cell senescence is involved. Chromobox homolog protein 4 (CBX4) exhibits anti-inflammatory effects and shows promising therapeutic potential. Thus, in the present study, we explore the role of CBX4 in IDD. Immunohistochemistry staining reveals that CBX4 expression is decreased in severe degenerative NP tissues compared to mild degenerative tissues, and real-time PCR and western blot analysis results show that CBX4 expression is downregulated under TNF-α stimulation in NP cells. siRNA and adenoviruses are used to knockdown or overexpress CBX4, respectively. The results demonstrate that CBX4 knockdown augments the catabolism of ECM in human NP cells, while CBX4 overexpression in rat NP cells restores the ECM degradation induced by TNF-α, as illustrated by immunofluorescence and western blot analysis. In addition, transcriptome sequencing results reveal the regulatory effect of CBX4 on the cell cycle, and further western blot analysis and senescence-associated β-galactosidase staining assay indicate that CBX4 overexpression alleviates cell senescence in the presence of TNF-α. Moreover, the phosphorylation of p65, which indicates the activation of NF-κB signaling, is measured by western blot analysis and immunofluorescence assay, and the results reveal that CBX4 overexpression reduces the TNF-α-induced increase in the p-p65/p65 ratio. In addition, the effect of CBX4 overexpression in NP cells is suppressed by NF-κB agonist. In summary, our results indicate that CBX4 overexpression can suppress TNF-α-induced matrix catabolism and cell senescence in the NP by inhibiting NF-κB activation. This study may provide new approaches for preventing and treating IDD. Oxford University Press 2022-06-02 /pmc/articles/PMC9828005/ /pubmed/35880565 http://dx.doi.org/10.3724/abbs.2022063 Text en © The Author(s) 2021. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Research Article Zhang, Yangyang Li, Shuangxing Hong, Junmin Yan, Jiansen Huang, Zhengqi Wu, Jiajun Deng, Zhihuai Qin, Tianyu Xu, Kang Ye, Wei Chromobox homolog 4 overexpression inhibits TNF-α-induced matrix catabolism and senescence by suppressing activation of NF-κB signaling pathway in nucleus pulposus cells: CBX4 overexpression inhibits TNF-α-induced matrix catabolism and senescence |
title | Chromobox homolog 4 overexpression inhibits TNF-α-induced matrix catabolism and senescence by suppressing activation of NF-κB signaling pathway in nucleus pulposus cells: CBX4 overexpression inhibits TNF-α-induced matrix catabolism and senescence |
title_full | Chromobox homolog 4 overexpression inhibits TNF-α-induced matrix catabolism and senescence by suppressing activation of NF-κB signaling pathway in nucleus pulposus cells: CBX4 overexpression inhibits TNF-α-induced matrix catabolism and senescence |
title_fullStr | Chromobox homolog 4 overexpression inhibits TNF-α-induced matrix catabolism and senescence by suppressing activation of NF-κB signaling pathway in nucleus pulposus cells: CBX4 overexpression inhibits TNF-α-induced matrix catabolism and senescence |
title_full_unstemmed | Chromobox homolog 4 overexpression inhibits TNF-α-induced matrix catabolism and senescence by suppressing activation of NF-κB signaling pathway in nucleus pulposus cells: CBX4 overexpression inhibits TNF-α-induced matrix catabolism and senescence |
title_short | Chromobox homolog 4 overexpression inhibits TNF-α-induced matrix catabolism and senescence by suppressing activation of NF-κB signaling pathway in nucleus pulposus cells: CBX4 overexpression inhibits TNF-α-induced matrix catabolism and senescence |
title_sort | chromobox homolog 4 overexpression inhibits tnf-α-induced matrix catabolism and senescence by suppressing activation of nf-κb signaling pathway in nucleus pulposus cells: cbx4 overexpression inhibits tnf-α-induced matrix catabolism and senescence |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9828005/ https://www.ncbi.nlm.nih.gov/pubmed/35880565 http://dx.doi.org/10.3724/abbs.2022063 |
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