In:
CARTILAGE, SAGE Publications, Vol. 11, No. 1 ( 2020-01), p. 98-107
Abstract:
Abnormal joint movement is associated with osteoarthritis (OA). Previous studies using the controlling abnormal joint movement (CAJM) model of OA reported delayed cartilage degeneration; however, none of them focused on gait performance and the localization of matrix metalloproteinase 13 (MMP13) and tissue inhibitor of metalloproteinase-1 (TIMP-1) in chondrocytes. Therefore, we aimed to investigate the effect of controlling abnormal joint movement on gait performance and the localization of MMP13 and TIMP-1, using kinematic and histological analyses. Design Rats were assigned to 2 groups: anterior cruciate ligament transection (ACL-T) group and CAJM group ( n = 5/group); contralateral hind limbs of ACL-T rats were designated as intact. After 1, 2, and 4 weeks, step length was analyzed, and after 2, 4, and 8 weeks, Safranin O-Fast Green staining and immunohistochemical staining for MMP13 and TIMP-1 were performed. Results Step length did not differ significantly between the groups. However, degeneration of articular cartilage was higher in the ACL-T group than in the intact group ( P 〈 0.05). There was no significant difference in the CAJM group at all time points. Immunohistochemical analysis of the MMP13/TIMP-1 relationship revealed a significant increase in the expression ratio of MMP13 after 4 weeks in the ACL-T group compared to the CAJM group ( P 〈 0.05). Conclusions Controlling abnormal joint movement may reduce mechanical stress owing to kinematic elements of small articulation including joint instability and delayed cartilage degeneration, despite the lack of kinematic change in step length.
Type of Medium:
Online Resource
ISSN:
1947-6035
,
1947-6043
DOI:
10.1177/1947603518783449
Language:
English
Publisher:
SAGE Publications
Publication Date:
2020
detail.hit.zdb_id:
2515870-3
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