Adipose Mesenchymal Stem Cells Derived Exosomes Ameliorates KOA Cartilage Damage and Inflammation by Activation of PINK1-Mediated Mitochondrial Autophagy.

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

Knee osteoarthritis (KOA) is characterized by degenerative destruction of knee cartilage. Adipose tissue-derived mesenchymal stem cells (MSCs) have been widely used in the clinic to treat joint diseases, and the exosomes secreted by adipose tissue-derived MSCs (ADSC-Exos) are more stable and easier to store than stem cell therapy alone. The aim of this study was to investigate whether ADSC-Exos could reduce KOA chondrocyte damage and inflammation by activating mitochondrial autophagy. In vitro, we induced a KOA chondrocyte model with lipopolysaccharide (LPS), and after treatment with ADSC-Exos, we assessed chondrocyte damage and inflammation by using HE, Senna O solid green, and Alcian blue staining and IL-1β immunofluorescence analysis. We also labeled chondrocytes and assessed their intracellular levels of reactive oxygen species (ROS) using the DCFH-DA probe, assessed the mitochondrial membrane potential of chondrocytes using a mitochondrial membrane potential detection kit (JC-1). In vivo, we constructed a KOA rat model by anterior cruciate ligament tenotomy (ACLT) surgery, treated the knee joint with a local injection of ADSC-Exos, reconstructed the knee joint in three dimensions using micro-CT, and evaluated the pathological changes in cartilage tissues by using HE, Senna O solid green, and Alcian blue staining. The in vivo and in vitro results showed that ADSC-Exos upreg

Evidence level

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

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