scholarly journals Early Patellofemoral Articular Cartilage Degeneration In a Rat Model of Patellar Instability associated with activation of NF-κB Signal Pathway

2020 ◽  
Author(s):  
Wei Lin ◽  
Yike Dai ◽  
Guangmin Yang ◽  
Jinghui Niu ◽  
Ming Li ◽  
...  
Keyword(s):  
Articular Cartilage ◽  
Subchondral Bone ◽  
Patellar Instability ◽  
Cartilage Degeneration ◽  
Signal Pathway ◽  
Control Group ◽  
Micro Ct ◽  
Model Group ◽  
Articular Cartilage Degeneration ◽  
Histological Staining

Abstract Background Patellar instability (PI) often increases the possibility of lateral patellar dislocation and early osteoarthritis. The early articular cartilage degeneration of patellofemoral osteoarthritis (PFOA) in molecular mechanism still needs further investigation. It is commonly known that NF-κB signal pathway plays an important part in articular cartilage degeneration. The aim of this study was to investigate the relationship between NF-κB signaling pathway and degeneration of patellofemoral joint cartilage. Methods We established a model of PFOA caused by patellar instability in SD rats. 120 female Sprague-Dawley rats aged 4 weeks were randomly divided into two groups: patellar instability(PI, n=60) group and control group (n=60). The cartilage of the PI model group and the control group were separated at the stages of 4, 8, 12 weeks for comparison. The morphological structure of the trochlear cartilage and subchondral bone were evaluated by micro-computed tomographic (Micro-CT) and histological staining. The expression of NF-κB, Matrix metalloproteinase (MMP)-13, Collagen X and TNF-a were evaluated by immunohistochemistry and real-time polymerase chain reaction (RT-PCR). Results Micro-CT and histological staining showed that subchondral bone loss was found from 8 weeks after surgery in PI model group. Compared with the control group, the protein and mRNA expression of NF-κB, TNF-a were remarkably increased in PI model group at 4, 8 and 12 weeks after surgery. In addition, the markers of cartilage degeneration MMP-13 and Collagen X were found higher in PI model group at different stages after surgery. Conclusion This study proved that early patellofemoral joint cartilage degeneration can be caused by PI in growing rats, accompanied by significant subchondral bone loss. In addition, the degeneration of articular cartilage might associated with the activation of NF-κB signal pathway and become aggravated with time in PI model group.

scholarly journals Early patellofemoral articular cartilage degeneration in a rat model of patellar instability is associated with activation of the NF-κB signaling pathway

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Wei Lin ◽  
Huijun Kang ◽  
Yike Dai ◽  
Yingzhen Niu ◽  
Guangmin Yang ◽  
...  
Keyword(s):  
Articular Cartilage ◽  
Signaling Pathway ◽  
Subchondral Bone ◽  
Patellofemoral Joint ◽  
Patellar Instability ◽  
Cartilage Degeneration ◽  
Control Group ◽  
And Control ◽  
Articular Cartilage Degeneration ◽  
And Cartilage

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.

scholarly journals Early Patellofemoral Articular Cartilage Degeneration in a Rat Model of Patellar Instability is Associated with Activation of the NF-κB Signaling Pathway

2020 ◽  
Author(s):  
Wei Lin ◽  
Huijun Kang ◽  
Yike Dai ◽  
Yingzhen Niu ◽  
Guangmin Yang ◽  
...  
Keyword(s):  
Articular Cartilage ◽  
Signaling Pathway ◽  
Subchondral Bone ◽  
Patellofemoral Joint ◽  
Patellar Instability ◽  
Cartilage Degeneration ◽  
Control Group ◽  
And Control ◽  
Articular Cartilage Degeneration ◽  
And Cartilage

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.

scholarly journals Early Patellofemoral Articular Cartilage Degeneration in a Rat Model of Patellar Instability is Associated with Activation of the NF-κB Signaling Pathway

2020 ◽  
Author(s):  
Wei Lin ◽  
Yike Dai ◽  
Guangmin Yang ◽  
Jinghui Niu ◽  
Ming Li ◽  
...  
Keyword(s):  
Articular Cartilage ◽  
Signaling Pathway ◽  
Subchondral Bone ◽  
Patellofemoral Joint ◽  
Patellar Instability ◽  
Cartilage Degeneration ◽  
Control Group ◽  
And Control ◽  
Articular Cartilage Degeneration ◽  
And Cartilage

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.

scholarly journals Early Patellofemoral Articular Cartilage Degeneration in a Rat Model of Patellar Instability is Associated with Activation of the NF-κB Signaling Pathway

2021 ◽  
Author(s):  
Wei Lin ◽  
Huijun Kang ◽  
Yike Dai ◽  
Yingzhen Niu ◽  
Guangmin Yang ◽  
...  
Keyword(s):  
Articular Cartilage ◽  
Signaling Pathway ◽  
Subchondral Bone ◽  
Patellofemoral Joint ◽  
Patellar Instability ◽  
Cartilage Degeneration ◽  
Control Group ◽  
And Control ◽  
Articular Cartilage Degeneration ◽  
And Cartilage

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.

Reduced PDGF‐AA in subchondral bone leads to articular cartilage degeneration after strenuous running

2019 ◽  
Vol 234 (10) ◽  
pp. 17946-17958 ◽  
Author(s):  
Zilong Yao ◽  
Peisheng Chen ◽  
Shengnan Wang ◽  
Ganming Deng ◽  
Yanjun Hu ◽  
...  
Keyword(s):  
Articular Cartilage ◽  
Subchondral Bone ◽  
Cartilage Degeneration ◽  
Articular Cartilage Degeneration

Subchondral bone scan uptake correlates with articular cartilage degeneration in osteoarthritic knees

2016 ◽  
Vol 20 (10) ◽  
pp. 1393-1402 ◽  
Author(s):  
Do Young Park ◽  
Long Hao Jin ◽  
Byoung-Hyun Min ◽  
Kyu-Sung Kwack ◽  
Young-Sil An ◽  
...  
Keyword(s):  
Articular Cartilage ◽  
Subchondral Bone ◽  
Bone Scan ◽  
Cartilage Degeneration ◽  
Articular Cartilage Degeneration

scholarly journals Effect of differences in mechanical stress in vivo on the onset and progression of knee osteoarthritis

2021 ◽  
Author(s):  
Kohei Arakawa ◽  
Kei Takahata ◽  
Yuichiro Oka ◽  
Kaichi Ozone ◽  
Sumika Nakagaki ◽  
...  
Keyword(s):  
Articular Cartilage ◽  
Bone Formation ◽  
Mechanical Stress ◽  
Compressive Stress ◽  
Subchondral Bone ◽  
Shear Force ◽  
Joint Instability ◽  
Cartilage Degeneration ◽  
Articular Cartilage Degeneration

Objective: The effect of the type of mechanical stress on OA onset has not been clarified. The aim of this study was to establish a new model that reproduces the type and increase and decrease of mechanical stress in vivo and to clarify the differences in the mechanism of knee OA onset and progression among the models. Design: To reproduce the difference in mechanical stress, we used the anterior cruciate ligament transection (ACL-T) model and the destabilization of the medial meniscus (DMM) model. In addition, we created a controlled abnormal tibial translation (CATT) model and a controlled abnormal tibial rotation (CATR) model that suppressed the joint instability of the ACL-T and DMM model, respectively. These four models reproduced the increase and decrease in shear force due to joint instability and compressive stress due to meniscal dysfunction. We performed joint instability analysis with soft X-ray, micro computed tomography analysis, histological analysis, and immunohistological analysis in 4 and 6 weeks. Results: Joint instability decreased in the CATT and CATR groups. The meniscus deviated in the DMM and CATR groups. Chondrocyte hypertrophy increased in the ACL-T and DMM groups with joint instability. In the subchondral bone, bone resorption was promoted in the ACL-T and CATT groups, and bone formation was promoted in the DMM and CATR groups. Conclusions: Increased shear force causes articular cartilage degeneration and osteoclast activation in the subchondral bone. In contrast, increased compressive stress promotes bone formation in the subchondral bone earlier than articular cartilage degeneration occurs.

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