Aggrecanase- and matrix metalloproteinase-mediated aggrecan degradation is associated with different molecular characteristics of aggrecan and separated in time ex vivo
Abstract
Aggrecan is one of the first proteins to be depleted from articular cartilage in early osteoarthritis. We investigated the molecular differences between matrix metalloproteinase (MMP)- and aggrecanase-mediated aggrecan degradation, as a consequence of their distinct time-dependent degradation profiles. Cartilage degradation was induced by cytokine stimulation in bovine articular cartilage explants and quantified by a dye-binding assay and immunoassays. The size of degradation fragments was analysed by Western blot. Cytokine stimulation resulted in the early release of aggrecanase-mediated aggrecan degradation fragments. In contrast, MMP-mediated aggrecan degradation began only at day 16 and continued to day 21. Western blot analysis showed that glycosylated high-molecular-weight (374)ARGSVI fragments appeared at day 7, in contrast to deglycosylated low-molecular-weight (342)FFGVG fragments which were detected at day 21. Aggrecan degradation may be divided into two different pools, a high-molecular-weight aggrecanase-mediated pool, and a low-molecular-weight MMP-mediated pool. This may have implications for the development of intervention strategies for OA.
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Aggrecan has been previously identified as an MMP-9 target.
“As aggrecan has been previously identified as an MMP-9 target (Mercuri et al., 2000; Madsen et al., 2010; Rankin-Gee et al., 2015), aggrecan-rich PNNs may be unstable in the presence of MMP-9, leading to abnormal development and neural excitability (Murase et al., 2017; Wen et al., 2017).”
From The Perineuronal ‘Safety’ Net? Perineuronal Net Abnormalities in Neurological Disorders (2018) · cites this paper as Madsen et al., 2010
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The Perineuronal ‘Safety’ Net? Perineuronal Net Abnormalities in Neurological Disorders
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- Authors
- Madsen, S. H., Sumer, E. U., Bay-Jensen, A.-C., Sondergaard, B.-C., Qvist, P., & Karsdal, M. A.
- Affiliations
- Nordic Bioscience (Denmark) (DK)
- Corresponding author
- Madsen, Suzi Hoegh
- Venue
- Biomarkers
- Publisher
- Informa UK Limited
- Published
- 2009-12-29
- Volume
- 15
- Issue
- 3
- Pages
- 266-276
- ISSN
- 1354-750X (ISSN-L)
- 1366-5804
- OpenAlex
- W1992641574
- Cited by
- 29
- References
- 35
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 3 · 2023: 1 · 2021: 1 · 2020: 3 · 2019: 2 · 2018: 3 · 2017: 2 · 2015: 1 · 2014: 1 · 2013: 2 · 2012: 3
- FWCI
- 1.42
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Biomarkers (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Rheumatology › Osteoarthritis Treatment and Mechanisms
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Protease and Inhibitor Mechanisms
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Proteoglycans and glycosaminoglycans research
- Keywords
- aggrecan degradation, aggrecanase, matrix metalloproteinases, osteoarthritis, articular cartilage, glycosylation
- MeSH terms
- ADAMTS4 Protein, Animals, Cartilage, Cattle, Glycosaminoglycans, Models, Biological, Osteoarthritis, Endopeptidases, Procollagen N-Endopeptidase, Blotting, Western, Biomarkers, Cytokines, Matrix Metalloproteinase 9, Matrix Metalloproteinases, Models, Animal, ADAM Proteins, Aggrecans
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