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Intervertebral disc cell chondroptosis elicits neutrophil response in spondylodiscitis. | LitMetric

AI Article Synopsis

  • A study was conducted to explore the pathophysiology of spondylodiscitis, a serious infection affecting the intervertebral disc and vertebrae, by combining clinical data from nine patients with a new experimental porcine model.
  • The findings revealed that acute spondylodiscitis was marked by significant tissue necrosis, neutrophil infiltration, and empty lacunae due to IVD cell death, which were replicated in the porcine model.
  • Inflammatory markers and cytokines were found to play key roles in the disease process, highlighting the importance of understanding inflammatory IVD cell death for future therapeutic strategies.

Article Abstract

To understand the pathophysiology of spondylodiscitis due to , an emerging infectious disease of the intervertebral disc (IVD) and vertebral body with a high complication rate, we combined clinical insights and experimental approaches. Clinical data and histological material of nine patients suffering from spondylodiscitis were retrospectively collected at a single center. To mirror the clinical findings experimentally, we developed a novel porcine model mimicking acute spondylodiscitis and assessed the interaction between and IVD cells within their native environment. In addition, the inflammatory features underlying this interaction were assessed in primary human IVD cells. Finally, mirroring the clinical findings, we assessed primary human neutrophils for their ability to respond to secreted inflammatory modulators of IVD cells upon the challenge. Acute spondylodiscitis in patients was characterized by tissue necrosis and neutrophil infiltration. Additionally, the presence of empty IVD cells' lacunae was observed. This was mirrored in the porcine model, where induced extensive IVD cell death, leading to empty lacunae. Concomitant engagement of the apoptotic and pyroptotic cell death pathways was observed in primary human IVD cells, resulting in cytokine release. Among the released cytokines, functionally intact neutrophil-priming as well as broad pro- and anti-inflammatory cytokines which are known for their involvement in IVD degeneration were found. In patients as well as in a novel porcine model, IVD infection caused IVD cell death, resulting in empty lacunae, which was accompanied by the release of inflammatory markers and recruitment of neutrophils. These findings offer valuable insights into the important role of inflammatory IVD cell death during spondylodiscitis and potential future therapeutic approaches.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9366608PMC
http://dx.doi.org/10.3389/fimmu.2022.908211DOI Listing

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