Synovial tissue expression of OSM, gp130, OSMR and LIFR is increased in arthritis.
OSM induces synovial fibroblast (SF) expression of IL-6, RANKL, OSMR, gp130, IL-1R.
OSM action in SFs requires the expression of OSMR.
OSM augments IL-1尾 induction of IL-6 & RANKL in SFs, by increasing IL-1R expression.
OSM augments TNF induction of IL-6 but not RANKL expression in SFs.