Interleukin-1 receptor type 2

Definition:

Non-signaling receptor for IL1A, IL1B and IL1RN. Reduces IL1B activities. Serves as a decoy receptor by competitive binding to IL1B and preventing its binding to IL1R1. Also modulates cellular response through non-signaling association with IL1RAP after binding to IL1B. IL1R2 (membrane and secreted forms) preferentially binds IL1B and poorly IL1A and IL1RN. The secreted IL1R2 recruits secreted IL1RAP with high affinity; this complex formation may be the dominant mechanism for neutralization of IL1B by secreted/soluble receptors.

References:

[1]. D Neumann, et al. The membrane form of the type II IL-1 receptor accounts for inhibitory function. J Immunol. 2000 Sep 15;165(6):3350-7. [Content Brief]

[2]. J G Giri, et al. Elevated levels of shed type II IL-1 receptor in sepsis. Potential role for type II receptor in regulation of IL-1 responses. J Immunol. 1994 Dec 15;153(12):5802-9. [Content Brief]

[3]. Dirk E Smith, et al. The soluble form of IL-1 receptor accessory protein enhances the ability of soluble type II IL-1 receptor to inhibit IL-1 action. Immunity. 2003 Jan;18(1):87-96. [Content Brief]

[4]. D Lang, et al. The type II IL-1 receptor interacts with the IL-1 receptor accessory protein: a novel mechanism of regulation of IL-1 responsiveness. J Immunol. 1998 Dec 15;161(12):6871-7. [Content Brief]

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