Discovery of GS-9688 (Selgantolimod) as a Potent and Selective Oral Toll-Like Receptor 8 Agonist for the Treatment of Chronic Hepatitis B
作者:Richard L. Mackman、Michael Mish、Gregory Chin、Jason K. Perry、Todd Appleby、Vangelis Aktoudianakis、Sammy Metobo、Peter Pyun、Congrong Niu、Stephane Daffis、Helen Yu、Jim Zheng、Armando G. Villasenor、Jeff Zablocki、Jason Chamberlain、Haolun Jin、Gary Lee、Kimberley Suekawa-Pirrone、Rex Santos、William E. Delaney、Simon P. Fletcher
DOI:10.1021/acs.jmedchem.0c00100
日期:2020.9.24
Toll-like receptor 8 (TLR8) recognizes pathogen-derived single-stranded RNA fragments to trigger innate and adaptive immune responses. Chronic hepatitis B (CHB) is associated with a dysfunctional immune response, and therefore a selective TLR8 agonist may be an effective treatment option. Structure-based optimization of a dual TLR7/8 agonist led to the identification of the selective TLR8 clinical
Toll样受体8(TLR8)识别病原体衍生的单链RNA片段,以触发先天性和适应性免疫反应。慢性乙型肝炎(CHB)与机能障碍的免疫反应有关,因此选择性TLR8激动剂可能是一种有效的治疗选择。对双TLR7 / 8激动剂的基于结构的优化导致对选择性TLR8临床候选物(R)-2-((2-氨基-7-氟吡啶并[3,2 - d ]嘧啶-4-基)氨基的鉴定)-2-甲基己-1-醇(GS-9688,(R)-7)。在人外周血单核细胞(PBMC)中观察到强效TLR8激动作用(IL-12p40 EC 50 = 220 nM)和> 100倍TLR7选择性(IFN- αEC 50 > 50μM)。TLR8外部域:(R)-7复合物证实了TLR8结合以及与TLR8残基Asp545的直接配体相互作用。在临床前物种中,口服(R)-7具有良好的吸收性和较高的首过清除率。在用(R)-7刺激的PBMC培养基中处理的HBV感染的原代人