Although there was no significant difference between the PAG and the AAG, the PAG showed a trend of better repair effect than the AAG ( Figure 4b ). 3.5 Passive exercise intervention decrease inflammatory factors expression in KOA rats The levels of TNF-α and IL-6 in the serum and synovial fluid of KOA rats were measured using ELISA.
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Comparison of passive and active motion: effect of myokine irisin on cartilage in knee osteoarthritis rats.
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