Katsuya Onitsuka1, Kenji Murata2, Takanori Kokubun2, Shuhei Fujiwara3, Aya Nakajima3, Yuri Morishita3, Naohiko Kanemura2. 1. Department of Rehabilitation, Tokyo Women's Medical University Yachiyo Medical Center, Chiba, Japan. 2. Department of Physical Therapy, School of Health and Social Services, Saitama Prefectural University, Saitama, Japan. 3. Graduate Course of Health and Social Services, Graduate School of Saitama Prefectural University, Saitama, Japan.
Abstract
OBJECTIVE: 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.
OBJECTIVE: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.
Authors: F Dobson; R S Hinman; E M Roos; J H Abbott; P Stratford; A M Davis; R Buchbinder; L Snyder-Mackler; Y Henrotin; J Thumboo; P Hansen; K L Bennell Journal: Osteoarthritis Cartilage Date: 2013-05-13 Impact factor: 6.576
Authors: Y Muramatsu; T Sasho; M Saito; S Yamaguchi; R Akagi; S Mukoyama; Y Akatsu; J Katsuragi; T Fukawa; J Endo; H Hoshi; Y Yamamoto; K Takahashi Journal: Osteoarthritis Cartilage Date: 2014-04-03 Impact factor: 6.576