Puerarin Attenuates Osteoarthritis via Upregulating AMP-Activated Protein Kinase/Proliferator-Activated Receptor-γ Coactivator-1 Signaling Pathway in Osteoarthritis Rats

Abstract

Background/Aims: Osteoarthritis is the most common degenerative joint disease and causes major pain and disability in adults. It has been reported that mitochondrial dysfunction in chondrocytes was associated with osteoarthritis. Puerarin has multiple effects including restoring mitochondrial function. In this study, the potential effects of puerarin on osteoarthritis and osteoarthritis associated mitochondrial dysfunctions were evaluated. Methods: Osteoarthritis rats were treated with puerarin and the severity of osteoarthritis and cartilage damages was evaluated. The mitochondrial biogenesis and functions were analyzed by measuring related proteins expression, mitochondrial DNA content, ATP production, and oxygen consumption. The dependence of AMP-activated protein kinase (AMPK) pathway on puerarin-regulated mitochondrial function was analyzed by applying AMPK inhibitor Compound C. Results: Puerarin treatment alleviated mechanical hyperalgesia and cartilage damage in osteoarthritis rats. Puerarin increased mitochondrial biogenesis and attenuated mitochondrial dysfunctions in osteoarthritis rats. AMPK inhibitor Compound C abolished puerarin’s effects. Conclusion: Puerarin attenuates osteoarthritis by upregulating the AMPK/proliferator-activated receptor-γ coactivator signaling pathway in osteoarthritis rats.