Forced Mobilization and Osteoarthritis in Rats
Author Information
Author(s): Appleton C, Thomas G, McErlain David D, Pitelka Vasek, Schwartz Neil, Bernier Suzanne M, Henry James L, Holdsworth David W, Beier Frank
Primary Institution: CIHR Group in Skeletal Development & Remodeling, Schulich School of Medicine & Dentistry, The University of Western Ontario
Hypothesis
Forced mobilization in a rat model of osteoarthritis will accelerate the progression of the disease.
Conclusion
Forced mobilization accelerates osteoarthritis damage in the destabilized joint.
Supporting Evidence
- Cartilage degradation and subchondral changes were observed as early as 2 weeks after surgery.
- Forced mobilization exercise accelerated OA progression compared to non-mobilized controls.
- Histologic changes correlated well with micro-CT analysis of underlying bone.
- Increased chondrocyte hypertrophy was noted during OA pathogenesis.
- The model reflects properties of human OA and is suitable for longitudinal studies.
Takeaway
This study shows that making rats exercise after a knee surgery makes their arthritis get worse faster.
Methodology
Male Sprague-Dawley rats underwent joint destabilization surgery and were divided into groups for forced mobilization or control.
Potential Biases
Potential bias in the assessment of histological changes due to subjective scoring.
Limitations
The model may not fully replicate human osteoarthritis and the effects of forced mobilization may vary.
Participant Demographics
Male Sprague-Dawley rats, weight-matched, aged 8-12 weeks.
Statistical Information
P-Value
0.029
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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