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Updated: Dec 28, 2025
Destabilization of the Medial Meniscus and Cartilage Scratch Murine Model of Accelerated Osteoarthritis
Published on: July 6, 2022
Proximal fibular osteotomy alleviates medial compartment knee osteoarthritis in a mouse model
Tian-Rui Wang1,2, Hong-De Wang1,2, Wei Chen1,2
1Department of Orthopedic Surgery, The Third Hospital of Hebei Medical University, No. 139 Ziqiang Road, Qiaoxi District, Shijiazhuang, 050051, Hebei, People's Republic of China.
Purpose:
The purpose of this study was to establish a mouse model of proximal fibular osteotomy (PFO), and to determine if PFO could delay degeneration of the medial compartment of the knee joint in a mouse model.
Methods:
An animal model of destabilization of the medial meniscus (DMM) was used to induce post-traumatic knee osteoarthritis (OA). PFO was performed to examine the effectiveness of PFO on protection against medial compartment knee OA. Micro-CT was used to observe osteosclerosis development in the subchondral bone, and Safranin O-fast green staining was used to evaluate the progression of articular cartilage destruction. The condylar-plateau angle (CPA) and anatomical femorotibial angle (aFTA) were measured to determine whether knee alignment was changed after PFO.
Results:
PFO treatment could decrease osteophyte formation and osteosclerosis development in the subchondral bone, as observed by micro-CT. The value of the ratio of trabecular bone volume to total volume (BV/TV) of DMM+PFO group was lower than that of DMM group. PFO also inhibited the progression of articular cartilage destruction. DMM + PFO group displayed decreased maximal and summed OA scores, as compared with DMM group. Moreover, the change of knee alignment was reduced by PFO, which might be the mechanism of PFO alleviating medial compartment knee OA.
Conclusion:
Our results indicated that PFO could alleviate medial compartment knee OA in a mouse model.
Insights
Proximal fibular osteotomy (PFO) in a mouse model effectively delayed medial compartment knee osteoarthritis progression. This surgical intervention reduced cartilage destruction and altered knee alignment, offering a potential therapeutic strategy.
Area of Science:
- Orthopedics
- Biomedical Engineering
- Osteoarthritis Research
Background:
- Post-traumatic knee osteoarthritis (OA) is a significant clinical challenge.
- Current models often lack specific interventions to study protective mechanisms.
- Developing reliable animal models is crucial for investigating OA pathogenesis and treatment.
Purpose of the Study:
- Establish a mouse model of proximal fibular osteotomy (PFO).
- Evaluate the efficacy of PFO in preventing medial compartment knee OA degeneration.
- Investigate the impact of PFO on knee alignment and structural changes.
Main Methods:
- Destabilization of the medial meniscus (DMM) model to induce post-traumatic knee OA.
- Proximal fibular osteotomy (PFO) performed to assess protective effects.
- Micro-CT for subchondral bone osteosclerosis assessment.
- Safranin O-fast green staining for articular cartilage evaluation.
- Measurement of condylar-plateau angle (CPA) and anatomical femorotibial angle (aFTA) for knee alignment.
Main Results:
- PFO significantly decreased osteophyte formation and subchondral bone osteosclerosis.
- The trabecular bone volume to total volume ratio was lower in the DMM+PFO group compared to the DMM group.
- PFO inhibited articular cartilage destruction, leading to reduced OA scores.
- PFO mitigated changes in knee alignment, suggesting a mechanism for OA alleviation.
Conclusions:
- Proximal fibular osteotomy (PFO) effectively alleviates medial compartment knee osteoarthritis in a mouse model.
- PFO demonstrates potential as a therapeutic strategy for preventing OA progression.
- Modulation of knee alignment by PFO may be a key factor in its protective effects.
