TLR8 Inhibitor

TLR7/8-IN-1 is a crystalline from of a TLR7/TLR8 inhibitor extracted from patent WO2019220390, compound 2b. TLR7/8-IN-1 can be used for the research of autoimmune disease.

KBD4466 is an orally active potent TLR7 and TLR8 inhibitor with IC₅₀s of 0.9 nM and 2.8 nM, respectively. KBD4466 inhibits the expression of inflammatory cytokines IL-6 and IFN-α. KBD4466 improves disease progression and survival in the BXSB/MpJ mouse model of Systemic Lupus Erythematosus (SLE). KBD4466 can be used in the study of autoimmune diseases.

BI1543673 is an interleukin-1 receptor-associated kinase 4 (IRAK4) inhibitor. BI1543673 can reduce the inflammatory response stimulated by TLR4 and TLR7/8 in human lung tissue. BI1543673 can decrease inflammatory signaling in a mouse model of lung inflammation induced by LPS.

TLR7 agonist 21 (Compound 27B) is a selective agonist for Toll-like receptor 7(TLR7), with an EC₅₀ of 17.53 nM (for human TLR7) and 41.7 nM (for mouse TLR7). TLR7 agonist 21 stimulates the secretion of pro-inflammatory cytokines, such as IL-6, TNF-α, IFN-α1, and IL-4. TLR7 agonist 21 acts as a vaccine adjuvant, increases levels of IgG and IgA, and protects the mouse from influenza virus infections.

TLR9-IN-2 (Compound 20) is a selective inhibitor of Toll-like receptor 9 (TLR9) with IC₅₀ values for TLR9, TLR7, and TLR8 of 25, 1400, and > 50,000 nM respectively. TLR9-IN-2 can be used for the study of fibrosis, autoimmune and inflammatory diseases.

TLR7/8 agonist 9 (Compound 25a) is a TLR7/8 agonist, with EC₅₀s of 40 nM and 23 nM for hTLR7/8. TLR7/8 agonist 9 has anti-tumor activity and improves the antitumor activity of PD-1/PD-L1 blockade. TLR7/8 agonist 9 can be used for research of cancer immunotherapy.