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- W4247226003 abstract "Abstract Background: Patellar instability (PI) often increases the possibility of lateral patellar dislocation and early osteoarthritis. The molecular mechanism of early articular cartilage degeneration during patellofemoral osteoarthritis (PFOA) still requires further investigation. However, it is known that the NF-κB signaling pathway plays an important role in articular cartilage degeneration. The aim of this study was to investigate the relationship between the NF-κB signaling pathway and patellofemoral joint cartilage degeneration. Methods: We established a rat model of PI-induced PFOA. Female 4-week-old Sprague-Dawley rats (n=120) were randomly divided into two groups: the PI (n=60) and control group (n=60). The distal femurs of the PI and control group were isolated and compared 4, 8, and 12 weeks after surgery. The morphological structure of the trochlear cartilage and subchondral bone were evaluated by micro-computed tomography and histology. The expression of NF-κB, matrix metalloproteinase (MMP)-13, collagen X, and TNF-ɑ were evaluated by immunohistochemistry and quantitative polymerase chain reaction. Results: In the PI group, subchondral bone loss and cartilage degeneration were found 4 weeks after surgery. Compared with the control group, the protein and mRNA expression of NF-κB and TNF-ɑ were significantly increased 4, 8, and 12 weeks after surgery in the PI group. In addition, the markers of cartilage degeneration MMP-13 and collagen X were more highly expressed in the PI group compared with the control group at different time points after surgery. Conclusions: This study has demonstrated that early patellofemoral joint cartilage degeneration can be caused by PI in growing rats, accompanied by significant subchondral bone loss and cartilage degeneration. In addition, the degeneration of articular cartilage may be associated with the activation of the NF-κB signaling pathway and can deteriorate with time as a result of PI." @default.
- W4247226003 created "2022-05-12" @default.
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- W4247226003 date "2020-12-07" @default.
- W4247226003 modified "2023-10-17" @default.
- W4247226003 title "Early Patellofemoral Articular Cartilage Degeneration in a Rat Model of Patellar Instability is Associated with Activation of the NF-κB Signaling Pathway" @default.
- W4247226003 doi "https://doi.org/10.21203/rs.2.23233/v3" @default.
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