Biological Activity
TLR1 (compound 4a) is a low molecular weight, cell-penetrating Toll/IL-1 receptor/resistance (TIR) domain/BB-Loop mimic. TLR1 inhibits IL-1 receptor-mediated responses[1].
In Vitro
TLR1 inhibits IL-1β-induced phosphorylation of the mitogen-activated protein kinase p38 in EL4 thymoma cells and in freshly isolated murine lymphocytes in a concentration-dependent manner[1].
In Vivo
TLR1 interferes with the interactions between mouse MyD88 and IL-1RI at the TIR domains. TLR1 produces a significant attenuation of the IL-1β-induced fever response (200 mg/kg, i.p.)[1].
References & source
[1]. Bartfai T, et al. A low molecular weight mimic of the Toll/IL-1 receptor/resistance domain inhibits IL-1 receptor-mediated responses. Proc Natl Acad Sci U S A. 2003 Jun 24;100(13):7971-6.
Published experimental findings depend on the model and assay conditions. They do not guarantee equivalent performance in every application. For laboratory research use only.