Interleukin 19 (IL-19)

Interleukin 19 (IL-19) is a protein cytokine belonging to the IL-10 subfamily, encoded by the IL-19 gene on chromosome 1. It is expressed primarily by monocytes, macrophages, T and B lymphocytes, as well as non-immune cells such as endothelial and glial cells. IL-19 signals through the IL-20 receptor complex, activating the JAK-STAT (especially STAT3) and MAPK signaling pathways. Its primary biological role is immunosuppression: IL-19 promotes a Th2 immune response, dampening Th1 pro-inflammatory cytokine secretion and supporting anti-inflammatory phenotypes. It is also an important regulator of cell development (including neutrophil development) and angiogenesis, supporting tissue repair and protecting against excessive vascular injury during inflammatory episodes. Elevated or dysregulated IL-19 expression is associated with chronic inflammatory disease, cardiovascular pathology, and altered immune cell profiles. No direct drug interactions for IL-19 are currently established, but its signaling pathways and immunoregulatory functions make it a potential therapeutic target for inflammatory, autoimmune, and vascular diseases[1][2][3].

Other names

Interleukin-19IL19

Drugs targeting IL-19 would likely act by modulating cytokine signaling through the IL-20 receptor complexes, influencing STAT3 and MAPK pathways to alter immune cell polarization, inflammatory response, or promote/inhibit angiogenesis[1][3].