Fig.6From: Anti-inflammatory and immunomodulatory effects of the extracellular vesicles derived from human umbilical cord mesenchymal stem cells on osteoarthritis via M2 macrophagesImmunohistochemical staining was performed to detect expression of ARG1, CD206, and MMP13 in articular cartilage of OA rat model after treatment with indicated reagents; Scale bar: 200 μmBack to article page