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Ganoderic Acid A Attenuates IL-1β-Induced Inflammation in Human Nucleus Pulposus Cells Through Inhibiting the NF-κB Pathway

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Abstract

Intervertebral disc (IVD) degeneration is a major cause of low back pain associated with several pathological changes in the IVD, including dysfunction of nucleus pulposus (NP) cells. Ganoderic Acid A (GAA), one of triterpenoid extracts of Ganoderma lucidum (G. lucidum), has been reported to possess anti-inflammatory effect. In the current study, we aimed to evaluate the effect of Ganoderic Acid A (GAA) on the interleukin-1β (IL-1β)-induced inflammation in human NP cells. Our results showed that the IL-1β-stimulated production of inflammatory mediators including nitric oxide (NO), prostaglandin E2 (PGE2), inducible nitric oxide synthase (iNOS) and cyclooxygenase (COX)-2 were suppressed by GAA. In addition, treatment of NP cells with GAA significantly inhibited the production of inflammatory cytokines tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) in IL-1β-stimulated human NP cells. GAA improved the reduced expression levels of extracellular matrix (ECM) proteins, collagen II and aggrecan in IL-1β-stimulated human NP cells. GAA also alleviated IL-1β-induced the levels of matrix metalloproteinase (MMP)-3 and MMP-13. Furthermore, GAA inhibited the IL-1β-induced upregulation of the phosphorylation of p65 and downregulation of IκBα. Taken together, these findings indicated that GAA alleviated IL-1β-induced inflammation and ECM degradation in NP cells through regulating NF-κB pathway.

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Availability of Data and Material

The datasets analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

This study was supported by our hospital.

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Author notes

  1. Sihua Zheng and Jianmin Ma are contributed equally to this job.

Authors and Affiliations

  1. Orthopedics Department, Xixi Hospital of Hangzhou, Hangzhou, 310023, China

    Sihua Zheng, Xuezheng Zhao & Xuezi Yu

  2. Department of Bone Surgery, Yinchuan Second People’s Hospital, Yinchuan, 750011, China

    Jianmin Ma

  3. Orthopedics Department, Foshan Nanhai District Fifth People’s Hospital, Nanhai District, No. 63, Zhongbian Road, Dali TownFoshanGuangdong Province, 528231, China

    Yong Ma

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  1. Sihua Zheng
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Contributions

Sihua Zheng wrote this paper. Sihua Zheng, Jianmin Ma, and Xuezheng Zhao performed the experiments. Xuezi Yu analyzed the data. Yong Ma designed this study. All authors read and approved the final manuscript.

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Correspondence to Yong Ma.

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This study was approved and supervised by the ethics committee of Xixi Hospital of Hangzhou (Hangzhou, China). All the subjects have signed the informed consents. Each step was rigorously performed according to the code of ethics.

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Zheng, S., Ma, J., Zhao, X. et al. Ganoderic Acid A Attenuates IL-1β-Induced Inflammation in Human Nucleus Pulposus Cells Through Inhibiting the NF-κB Pathway. Inflammation 45, 851–862 (2022). https://doi.org/10.1007/s10753-021-01590-0

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