Effectiveness of Low-Intensity Exercise in Mitigating Active Arthritis Exacerbation in a Mouse Rheumatoid-Arthritis
Kaichi Ozone1,2, Tatsunori Kumagai3, Kohei Arakawa4,5
1Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan.
Summary
Low-intensity exercise therapy can reduce rheumatoid arthritis severity by decreasing inflammatory cytokines. This study suggests exercise may mitigate disease exacerbation in active rheumatoid arthritis patients.
Area of Science:
- Immunology
- Rheumatology
- Exercise Physiology
Background:
- Rheumatoid arthritis (RA) is an autoimmune disease causing synovitis and reduced quality of life.
- The therapeutic mechanisms of exercise for RA remain unclear.
- Investigating low-intensity exercise effects on active arthritis is crucial.
Purpose of the Study:
- To investigate the effects of low-intensity exercise on active rheumatoid arthritis using a mouse model.
- To elucidate the anti-inflammatory mechanisms underlying exercise therapy in RA.
Main Methods:
- Utilized a mouse model of rheumatoid arthritis (SKG mice).
- Groups included sedentary, arthritis (AR), and arthritis with exercise (AREx).
- Assessed arthritis scores, histological and bone morphometric analysis, and bulk mRNA sequencing of synovial-fat pad complex.
Main Results:
- Low-intensity exercise (AREx group) significantly reduced arthritis scores compared to the arthritis group (AR).
- Bone volume loss in the AR group was prevented in the AREx group.
- Exercise decreased inflammatory cytokine gene expression (e.g., IL6/Jak/Stat3) and increased anti-inflammatory cytokine expression in the synovium.
Conclusions:
- Low-intensity exercise demonstrates anti-inflammatory effects in active rheumatoid arthritis.
- Exercise therapy can mitigate arthritis exacerbation and preserve bone structure.
- Findings support exercise as a potential therapeutic strategy for managing RA.
