MicroRNA Dynamics in Osteoarthritis Pathogenesis
Summary
Osteoarthritis is characterised by progressive cartilage degradation, synovial inflammation and subchondral bone remodelling. Central to these processes is a finely tuned network of microRNAs—short, non-coding RNA molecules that regulate gene expression post-transcriptionally. In healthy joints, specific microRNAs maintain chondrocyte homeostasis by balancing anabolic and catabolic pathways, controlling extracellular matrix synthesis and restraining inflammatory mediators. Dysregulation of key microRNAs, such as those that target matrix metalloproteinases or aggrecanases, shifts this balance towards cartilage breakdown and pain. Emerging evidence highlights the influence of epigenetic modifications on microRNA expression and the potential of certain microRNA signatures as biomarkers for early disease detection. Moreover, therapeutic modulation of individual microRNAs is under investigation as a means to restore joint integrity and slow osteoarthritic progression.
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MicroRNA Dynamics in Osteoarthritis Pathogenesis publication trend
The graph below shows the total number of articles in microrna dynamics in osteoarthritis pathogenesis across all publications each year (not limited to Nature Index journals).
Technical terms
MicroRNA (miRNA): A short (∼22 nucleotides), single-stranded non-coding RNA molecule that binds target messenger RNAs to inhibit their translation or promote degradation.
Chondrocyte: A specialised cell within cartilage responsible for synthesising and maintaining the extracellular matrix of articular cartilage.
Extracellular matrix (ECM): The protein and proteoglycan network surrounding chondrocytes that provides structural support and biomechanical resilience to cartilage.
Epigenetic methylation: A chemical modification of DNA or associated molecules that alters gene expression without changing the underlying DNA sequence.
Inflammatory cytokine: A signalling protein, such as interleukin-1β, released by cells that promotes inflammation and can drive cartilage catabolism in osteoarthritis.
Matrix metalloproteinase (MMP): An enzyme family that degrades components of the extracellular matrix, often upregulated in osteoarthritic cartilage.
References
- Epigenetic Modifications of MiRNAs in Osteoarthritis: A Systematic Review on Their Methylation Levels and Effects on Chondrocytes, Extracellular Matrix and Joint Inflammation. Cells (2023).
- The Role of MicroRNAs in the Pathophysiology of Osteoarthritis. International Journal of Molecular Sciences (2024).
- Silencing miR-146a-5p Protects against Injury-Induced Osteoarthritis in Mice. Biomolecules (2023).
- Characterization of microRNA expression profiles in normal and osteoarthritic human chondrocytes. BMC Musculoskeletal Disorders (2012).
- Regulation of the IGFBP-5 and MMP-13 genes by the microRNAs miR-140 and miR-27a in human osteoarthritic chondrocytes. BMC Musculoskeletal Disorders (2009).
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