PTGS2 and osteoarthritis: In vitro and in vivo studies demonstrated that CJM reduced the IL‐1β‐, IL‐6, IL‐17‐ and TNF‐α‐induced up‐regulation of MMP3, MMP13, ADAMTS4, ADAMTS5 and COX‐2 and blocked osteoarthritis development in a destabilization of the medial meniscus mouse model.