The negative regulators of Il-1 signaling include the specific natural antagonist and the decoy receptor (type 2) and the broader scope regulator. The three regulators are listed with aliases in parentheses, full names and links to gene report pages:
Il1rn (IL-1RN) – interleukin 1 receptor antagonist
Il1r2 (IL-1RT2, IL-1R2) – interleukin 1 receptor type 2
Sigirr (TIR8) – single Ig and TIR domain containing