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A Proinflammatory, Degenerative Organ Culture Model to Simulate Early-Stage Intervertebral Disc Disease.
Published on: February 14, 2021
3.8K
Current Knowledge and Future Therapeutic Prospects in Symptomatic Intervertebral Disc Degeneration
Joo Han Kim1, Chang Hwa Ham1, Woo-Keun Kwon2
1Department of Neurosurgery, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea.
Yonsei Medical Journal
|February 20, 2022
Summary
Intervertebral disc degeneration causes lower back pain through inflammation and extracellular matrix breakdown. Understanding these molecular mechanisms is key to developing new treatments for degenerative disc disease.
Area of Science:
- Biochemistry
- Molecular Biology
- Orthopedics
Background:
- Intervertebral disc (IVD) degeneration is a primary cause of chronic lower back pain.
- Symptomatic IVD degeneration involves complex molecular mechanisms including inflammation and extracellular matrix (ECM) dysregulation.
- Neural and vascular ingrowth contribute to discogenic pain in degenerative disc diseases (DDDs).
Purpose of the Study:
- To elucidate the molecular basis of symptomatic degenerative disc diseases (DDDs).
- To emphasize the roles of degeneration, inflammation, angiogenesis, and ECM regulation in symptomatic DDD.
- To highlight the link between molecular changes and chronic discogenic pain.
Main Methods:
- Review of molecular mechanisms involved in IVD degeneration.
- Analysis of gene expression changes related to ECM homeostasis (anabolic vs. catabolic processes).
- Investigation of inflammatory pathways, macrophage involvement, and cytokine secretion.
- Examination of aberrant angiogenesis, vascular endothelial growth factor (VEGF), and hypoxia-inducible factor-1 (HIF-1) in the IVD microenvironment.
Main Results:
- Symptomatic DDD involves pro-inflammatory mediators that disrupt ECM homeostasis, leading to neural/vascular ingrowth and pain.
- Reduced expression of anabolic genes and increased matrix metalloproteinase (MMP) expression drive ECM degradation.
- Inflammation is mediated by macrophage-related cascades and pro-inflammatory cytokines.
- Aberrant angiogenesis, driven by VEGF and HIF-1 under hypoxic conditions, is a key pathological step.
- Degenerating IVD cells promote neovascularization by secreting angiogenic cytokines.
Conclusions:
- Loss of IVD viscoelasticity and altered ECM composition are central to DDD.
- Inflammation and aberrant angiogenesis are critical pathological processes in symptomatic DDD.
- A multidisciplinary approach integrating basic research and clinical applications is essential for advancing DDD and discogenic pain treatments.
Keywords:
Symptomatic intervertebral disc degenerationangiogenesisnerve ingrowthpro-inflammatory cytokinestreatment of DDDMore Related Videos
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