Interleukin-12 receptor, beta 1 subunit (IL-12Rβ1)

Interleukin-12 receptor, beta 1 subunit (IL-12Rβ1) is a type I transmembrane protein belonging to the class I cytokine receptor family and encoded by the IL12RB1 gene[1][6]. IL-12Rβ1 forms part of both the interleukin-12 and interleukin-23 receptor complexes, serving as a shared receptor subunit required for cytokine-dependent immune cell signaling. It binds to the p40 subunit of IL-12 and IL-23, working together with additional receptor chains for high-affinity binding and signal transduction[2][3][4][7]. Upon engagement with its cytokine ligands, IL-12Rβ1 mediates activation of Janus kinases (Tyk2/Jak2) and downstream STAT family transcription factors, regulating lymphocyte function, proliferation, and differentiation. Mutations or deficiencies result in severe immune defects, especially susceptibility to certain infections, and modulation of this receptor has significant implications in immunotherapy for cancer and autoimmunity[1][3][7][6].

Other names

CD212IL12RB1 (gene name)Interleukin-12 receptor subunit beta-1

Inhibition of IL-12/IL-23 signaling via blockade of shared p40 subunit, thereby suppressing Th1 and Th17-mediated immune responses Experimental cell-biased partial agonism resulting in selective modulation of T cell vs. NK cell activity for anti-tumor immunity and reduced toxicity Drugs binding IL-12/IL-23 prevent cytokine engagement with IL-12Rβ1, blocking downstream STAT activation