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    Title: Abnormal Perfusion in Patellofemoral Subchondral Bone Marrow in the Rat Anterior Cruciate Ligament Transection Model of Post-traumatic Osteoarthritis: a Dynamic Contrast-enhanced Magnetic Resonance Imaging Study
    Authors: Tsai, Ping-Huei;Lee, Herng-Sheng;Siow, Tiing Yee;Wang, Chao-Ying;Chang, Yue-Cune;Lin, Ming-Huang;Hsu, Yi-Chih;Lee, Chian-Her;Chung, Hsiao-Wen;Huang, Guo-Shu
    Keywords: Post-traumatic osteoarthritis;Patellofemoral joint;Anterior cruciate ligament;DCE-MRI;Perfusion;Subchondral bone marrow
    Date: 2016-01-01
    Issue Date: 2016-12-17 02:10:34 (UTC+8)
    Abstract: Objective

    Although anterior cruciate ligament (ACL) injury is a well-recognized risk factor for developing knee post-traumatic osteoarthritis (PTOA), the process in the patellofemoral (PF) joint after ACL injury is still under-researched. Our aim was to investigate the perfusion changes in PF subchondral bone marrow in the rat ACL transection (ACLX) model of PTOA using dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI).

    Design

    Eighteen male Sprague Dawley rats were randomly separated into three groups (n = 6 each group): a normal control group and groups receiving ACLX and sham-surgery, respectively, in the right knee. Perfusion parameters in the patellar and femoral subchondral bone marrows of all rats were measured on DCE-MRI at 0, 4, 8, and 16 weeks after respective treatment. After the last MRI at week 16, the rats were sacrificed and their right knees were harvested for histologic examination. In addition, to observe the long-term histologic change in PF joints, 9 additional rats (n = 3 in each group) were included and sacrificed at week 32 for histologic examination.

    Results

    In the ACLX group vs the sham and control groups, the perfusion parameters were significantly changed in both patellar and femoral subchondral bone marrows at week 16. Histologic examination revealed cartilage defects in ACLX rats at 32 weeks after surgery.

    Conclusions

    These data point to a possible functional relationship between subchondral bone marrow perfusion abnormalities and cartilage breakdown in PTOA. Moreover, the perfusion parameters derived from DCE-MRI can potentially serve as biomarkers of early OA.
    Relation: Osteoarthritis and Cartilage 24(1), pp.129-133
    DOI: 10.1016/j.joca.2015.07.015
    Appears in Collections:[數學學系暨研究所] 期刊論文

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