Interleukin-22 receptor complex (IL-22R complex)

The **Interleukin-22 receptor complex** is a heterodimeric cell surface receptor formed by two subunits: **interleukin-22 receptor alpha 1 (IL-22R1)** and **interleukin-10 receptor beta (IL-10R2)**. This complex is essential for recognizing and transducing signals from the cytokine interleukin-22 (IL-22), a key mediator in tissue-specific immunity, epithelial cell defense, and barrier maintenance. Upon ligand binding, the receptor activates intracellular signaling cascades such as **Jak1/Tyk2-STAT3**, which result in various biological responses including cell survival, proliferation, production of antimicrobial peptides, and regulation of inflammation. The receptor’s expression is largely limited to non-immune cells (epithelial, hepatic, pulmonary, etc.), distinguishing its activity from other cytokine receptors in immune cell populations. Dysregulation or inappropriate activation of this complex is implicated in a range of diseases including autoimmune disorders, infections, inflammation, and certain cancers. While directly targeted clinical drugs are not yet available, recombinant IL-22 therapy and inhibition by soluble decoy receptors such as IL-22BP are under investigation. The receptor complex is a validated therapeutic target due to its critical roles in disease mechanisms and tissue repair biology.

Other names

IL-22 receptorIL22 receptorIL22R complexInterleukin 22 receptorIL-22/IL-22R1/IL-10R2 complexIL-22R1/IL-10R2 complexInterleukin 22 receptor, alpha 1 (IL22RA1) subunit as core component

Activation or inhibition of signaling through Jak1/Tyk2 and STAT3 upon binding of ligand (IL-22) Indirect modulation (antagonist or agonist) of IL-22 binding by decoy receptors such as IL-22BP, which neutralizes IL-22 activity Targeting upstream regulators of IL-22 production (e.g., IL-23 receptor) may modulate IL-22 receptor activity