Vasoactive intestinal peptide downregulates proinflammatory TLRs while upregulating anti-inflammatory TLRs in the infected cornea.
Authors: Jiang X, McClellan SA, Barrett RP, Zhang Y, Hazlett LD
J. Immunol., 2012;189(1):269-78.
Species: Mouse
Sample Type: Cell Lysates
Application: WB
The receptor SIGIRR suppresses Th17 cell proliferation via inhibition of the interleukin-1 receptor pathway and mTOR kinase activation.
Authors: Gulen MF, Kang Z, Bulek K, Youzhong W, Kim TW, Chen Y, Altuntas CZ, Sass Bak-Jensen K, McGeachy MJ, Do JS, Xiao H, Delgoffe GM, Min B, Powell JD, Tuohy VK, Cua DJ, Li X
Immunity, 2010;32(1):54-66.
Species: Mouse
Sample Type: Cell Lysates
Application: WB
The Toll-IL-1R member Tir8/SIGIRR negatively regulates adaptive immunity against kidney grafts.
Authors: Noris M, Cassis P, Azzollini N, Cavinato R, Cugini D, Casiraghi F, Aiello S, Solini S, Cassis L, Mister M, Todeschini M, Abbate M, Benigni A, Trionfini P, Tomasoni S, Mele C, Garlanda C, Polentarutti N, Mantovani A, Remuzzi G
J. Immunol., 2009;183(7):4249-60.
Species: Mouse
Sample Type: Whole Cells
Application: Flow

The Interleukin 1 receptor family (IL-1 R) comprises at least eleven members including IL-1 RI (IL-1 R1), IL-1 RII (IL-1 R2), IL-1 RAcP (IL‑1 R3), ST2 (T1/IL-1 R4), IL‑18 Ra (IL-1 Rrp/IL-1 R5), IL-1 Rrp2 (IL-1 RL2/IL-1 R6), IL‑18 Rb (AcPL/IL-1 R7), IL-1RAPL‑1 (TIGIRR‑2/IL‑1 R8), and TIGIRR-1 (IL-1 R9) (1). All family members possess three immunoglobulin (Ig)-like domains in their extracellular region. Most members have an intracellular TIR (Toll-like receptor/IL-1 receptor signaling) domain that is also conserved in the Toll-like receptor family. Five of the IL-1 R family members (1, 2, 4, 5, and 6) are clustered and localized to chromosome 2. SIGIRR (single Ig domain containing IL-1 receptor-related molecule) is a subtype of the IL-1 R family that differs from the other nine members by having only one Ig domain in its extracellular region. The sequence of mouse SIGIRR predicts a 409 amino acid (aa) residue transmembrane glycoprotein that lacks signal peptide and contains a 117 aa single Ig extracellular domain, a transmembrane region and a 268 aa cytoplasmic tail with a TIR domain. The cytoplasmic tail of SIGIRR contains a C-terminal extention beyond the TIR domain which is also found in IL-1 R8, IL-1 R9, and Toll-like receptor family members but absent in other IL-1 receptor family members. SIGIRR is widely expressed and is present in all cells and tissues examined. Mouse and human SIGIRR share 82% amino acid sequence identity. The ligand and signaling mechanism for SIGIRR has not been identified.

1. Thomassen, E. et al. (1999) Cytokine 11:389.