Suppressor of Cytokine Signaling 3 (SOCS3) is a key regulatory protein in the cytokine signaling network. It modulates JAK–STAT pathways by dampening signals—particularly those initiated by interleukin-6 (IL‑6) and oncostatin M (OSM). Beyond its classic inhibitory role, SOCS3 can also positively influence ERK–MAPK signaling and suppress NF‑κB activity.
This unique interplay makes it a focal point in immunology, inflammation, cancer biology, and metabolic research.