Related Experiment Video
Updated: Jul 6, 2026
Non-Invasive Compression-Induced Anterior Cruciate Ligament (ACL) Injury and In Vivo Imaging of Protease Activity in Mice
Published on: September 29, 2023
The regulation of the ADAMTS4 and ADAMTS5 aggrecanases in osteoarthritis: a review
J Bondeson1, S Wainwright, C Hughes
1Department of Rheumatology, Cardiff University, Cardiff School of Biosciences, Cardiff University, Cardiff, UK.
Abstract:
Destruction of articular cartilage is a key feature of a number of arthritides, osteoarthritis prominent among them. Aggrecan degradation, caused by increased activity of proteolytic enzymes that degrade macromolecules in the cartilage extracellular matrix, is followed by irreversible collagen degradation. The degradation of aggrecan is mediated by various matrix proteinases, mainly the aggrecanases, multidomain metalloproteinases belonging to the ADAMTS (a disintegrin and metalloproteinase with thrombospondin motifs) family. There has been much interest in the possible role of these aggrecanases, mainly ADAMTS4 and ADAMTS5, as therapeutic targets in osteoarthritis. There is still debate which of them is the major aggrecanase in osteoarthritis, however, as well as major issues concerning how they are regulated, with possible discrepancies between murine models and results obtained using human osteoarthritis tissue. This review discusses some recent data regarding the regulation of ADAMTS4 and ADAMTS5 gene expression in osteoarthritis, with emphasis on the role of proinflammatory cytokines in driving these enzymes, and of the transcription factor NFkappaB in mediating their expression.
Insights
Osteoarthritis involves cartilage destruction, primarily driven by aggrecan degradation mediated by ADAMTS4 and ADAMTS5 enzymes. Proinflammatory cytokines and NF-kappaB signaling regulate these key osteoarthritis enzymes.
Area of Science:
- Biochemistry
- Molecular Biology
- Rheumatology
Background:
- Articular cartilage destruction is a hallmark of osteoarthritis.
- Aggrecan degradation, mediated by matrix proteinases like ADAMTS enzymes, precedes irreversible collagen damage.
Purpose of the Study:
- To review recent data on the regulation of ADAMTS4 and ADAMTS5 gene expression in osteoarthritis.
- To emphasize the role of proinflammatory cytokines and NF-kappaB in osteoarthritis pathogenesis.
Main Methods:
- Literature review focusing on gene expression regulation.
- Analysis of data concerning proinflammatory cytokines and transcription factors.
Main Results:
- ADAMTS4 and ADAMTS5 are key aggrecanases implicated in osteoarthritis.
- Proinflammatory cytokines significantly drive the expression of these enzymes.
- NF-kappaB acts as a crucial mediator in the expression of ADAMTS4 and ADAMTS5.
Conclusions:
- Understanding the regulation of ADAMTS4 and ADAMTS5 is critical for osteoarthritis therapeutic development.
- NF-kappaB and cytokine signaling represent important targets for managing osteoarthritis progression.
