Exosomes derived from miRNA-210 overexpressing bone marrow mesenchymal stem cells protect lipopolysaccharide induced chondrocytes injury via the NF-κB pathway.

Bone marrow mesenchymal stem cells (BMSCs)-derived exosomes (Exos) have anti-inflammatory and anti-apoptotic functions. miRNA-210 has also been confirmed to play a role in inhibiting proinflammatory cytokines. Herein, we aimed to explore the effects of Exos derived from miRNA-210-overexpressing BMSCs (BMSCs-210-Exos) and the mechanisms by which they provide protection to chondrocytes from lipopolysaccharide (LPS)-induced injury. BMSCs were transfected with or without miRNA-210. Exos substantially improved the proliferation of chondrocytes and inhibited LPS-induced cell apoptosis. Furthermore, BMSCs-210-Exos promoted the proliferation of chondrocytes and prevented LPS-induced cell apoptosis better than BMSCs-Exos not overexpressing miRNA-210. In addition, tumor necrosis factor receptor superfamily member 21 (Tnfrsf21) expression was inhibited and the NF-κB pathway was attenuated by both BMSCs-Exos and BMSCs-210-Exos during LPS-induced chondrocyte injury. Collectively, these results suggest that BMSCs-210-Exos enhance the protection of chondrocytes from LPS-induced injury via the NF-κB pathway.

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