IL-38 binds to the IL-36 receptor and has biological effects on immune cells similar to IL-36 receptor antagonist.
van de Veerdonk FL, Stoeckman AK, Wu G, Boeckermann AN, Azam T, Netea MG, Joosten LA, van der Meer JW, Hao R, Kalabokis V, Dinarello CA. IL-38 binds to the IL-36 receptor and has biological effects on immune cells similar to IL-36 receptor antagonist. Proc Natl Acad Sci U S A. 2012 Feb 21; 109(8):3001-5.