Corticosteroid Modulation of Post-Traumatic Osteoarthritis
Summary
Post-traumatic osteoarthritis (PTOA) develops following acute joint injury and is characterised by inflammation, chondrocyte dysfunction and progressive degradation of the cartilage extracellular matrix. Corticosteroids, notably dexamethasone and other glucocorticoids, are widely employed to curb the early inflammatory cascade through binding to the cytosolic glucocorticoid receptor, transrepression of NF-κB and AP-1, and induction of anti-inflammatory genes. In preclinical explant and in vitro co-culture systems, short-term corticosteroid treatment has been shown to reduce proteoglycan loss, inhibit matrix metalloproteinase activity and partially restore biosynthetic function in injured cartilage. However, prolonged exposure may suppress anabolic pathways, alter chondrocyte viability and attenuate repair signalling. Advances in proteomics and human osteochondral modelling have refined our understanding of temporal biomarker release, donor variability and optimal dosing regimens. These insights are guiding the design of targeted intra-articular therapies to delay PTOA progression while minimising adverse effects.
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Corticosteroid Modulation of Post-Traumatic Osteoarthritis publication trend
The graph below shows the total number of articles in corticosteroid modulation of post-traumatic osteoarthritis across all publications each year (not limited to Nature Index journals).
Technical terms
Post-traumatic osteoarthritis (PTOA): A form of osteoarthritis triggered by joint injury, involving cartilage breakdown and inflammation.
Glucocorticoid receptor (GR): A cytosolic receptor that mediates the genomic and non-genomic actions of corticosteroids.
Matrix metalloproteinases (MMPs): A family of zinc-dependent enzymes that degrade cartilage extracellular matrix components.
Glycosaminoglycans (GAGs): Negatively charged polysaccharides in cartilage proteoglycans essential for tissue hydration and resilience.
References
- Effects of short-term glucocorticoid treatment on changes in cartilage matrix degradation and chondrocyte gene expression induced by mechanical injury and inflammatory cytokines. Arthritis Research & Therapy (2011).
- Glucocorticoids: do we know how they work?. Arthritis Research & Therapy (2002).
- Proteomic analysis reveals dexamethasone rescues matrix breakdown but not anabolic dysregulation in a cartilage injury model. Osteoarthritis and Cartilage Open (2020).
- Proteomic clustering reveals the kinetics of disease biomarkers in bovine and human models of post-traumatic osteoarthritis. Osteoarthritis and Cartilage Open (2021).
- Tissue catabolism and donor-specific dexamethasone response in a human osteochondral model of post-traumatic osteoarthritis. Arthritis Research & Therapy (2022).
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