Publication
Title
ADAMTS5-/- mice have less subchondral bone changes after induction of osteoarthritis through surgical instability : implications for a link between cartilage and subchondral bone changes
Author
Abstract
Objective Osteoarthritis (OA) is characterized by damaged articular cartilage and changes in subchondral bone. Previous work demonstrated aggrecanase-2 deficient (ADAMTS5−/−) mice to be protected from cartilage damage induced by joint instability. This study analyzed whether this protective effect on cartilage is also reflected in the subchondral bone structure. Methods Right knee joints from 10-week old male wild type (WT) and ADAMTS5−/− mice received transection of the medial meniscotibial ligament to induce OA, whereas left knees were left unoperated. After 8 weeks knee joints were scanned by micro-CT. The proximal tibia was selected for further analysis. Histology was performed to evaluate cartilage damage and osteoclast presence. Results ADAMTS5−/− joints had a significantly thinner subchondral plate and less epiphyseal trabecular bone compared to WT joints. Histology confirmed previous findings that ADAMTS5−/− mice have significantly less cartilage damage than WT in the instability-induced OA model. Although the subchondral bone plate became significantly thicker at the medial tibial plateau in operated joints of both genotypes, the percentage increase was significantly smaller in ADAMTS5−/− mice (WT: 20.7 ± 4.7%, ADAMTS5−/−: 8.3 ± 1.2% compared to the left unoperated control joint). In ADAMTS5−/− animals a significant decrease was found in both Oc.N./BS and Oc.S./BS. Finally, in WT but not in ADAMTS5−/− mice a significant correlation was found between medial subchondral bone plate thickness and cartilage damage at the medial tibial plateau. Conclusion ADAMTS5−/− joints that were protected from cartilage damage showed minor changes in the subchondral bone structure, in contrast to WT mice where substantial changes were found. This finding suggests links between the process of cartilage damage and subchondral bone changes in instability-induced OA.
Language
English
Source (journal)
Osteoarthritis and cartilage / Osteoarthritis Research Society. - London
Publication
London : 2009
ISSN
1063-4584
Volume/pages
17:5(2009), p. 636-645
ISI
000266139600014
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 09.11.2011
Last edited 13.11.2017
To cite this reference