Early alterations of subchondral bone in the rat anterior cruciate ligament transection model of osteoarthritis

Aizah, Nik and Chong, Pan Pan and Kamarul, Tunku (2021) Early alterations of subchondral bone in the rat anterior cruciate ligament transection model of osteoarthritis. Cartilage, 13 (2_SUPP). 1322S-1333S. ISSN 1947-6035, DOI https://doi.org/10.1177/1947603519878479.

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Objective Advances in research have shown that the subchondral bone plays an important role in the propagation of cartilage loss and progression of osteoarthritis (OA), but whether the subchondral bone changes precede or lead to articular cartilage loss remains debatable. In order to elucidate the subchondral bone and cartilage changes that occur in early OA, an experiment using anterior cruciate ligament transection (ACLT) induced posttraumatic OA model of the rat knee was conducted. Design Forty-two Sprague Dawley rats were divided into 2 groups: the ACLT group and the nonoperated control group. Surgery was conducted on the ACLT group, and subsequently rats from both groups were sacrificed at 1, 2, and 3 weeks postsurgery. Subchondral bone was evaluated using a high-resolution peripheral quantitative computed tomography scanner, while cartilage was histologically evaluated and scored. Results A significant reduction in the subchondral trabecular bone thickness and spacing was found as early as 1 week postsurgery in ACLT rats compared with the nonoperated control. This was subsequently followed by a reduction in bone mineral density and bone fractional volume at week 2, and finally a decrease in the trabecular number at week 3. These changes occurred together with cartilage degeneration as reflected by an increasing Mankin score over all 3 weeks. Conclusions Significant changes in subchondral bone occur very early in OA concurrent with surface articular cartilage degenerative change suggest that factors affecting bone remodeling and resorption together with cartilage matrix degradation occur very early in the disease.

Item Type: Article
Funders: University Malaya Research Grant (UMRG) [RP005D-13HTM], Fundamental Research Grant Scheme (FRGS) [FRGS/1/2018/STG05/UM/02/10] [FP068-2018A]
Uncontrolled Keywords: Osteoarthritis; Subchondral bone; ACLT; HR-pQCT
Subjects: R Medicine
Divisions: Faculty of Medicine
Depositing User: Ms Zaharah Ramly
Date Deposited: 06 Apr 2022 01:44
Last Modified: 06 Apr 2022 01:44
URI: http://eprints.um.edu.my/id/eprint/26965

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