Discovery of IACS-9439, a Potent, Exquisitely Selective, and Orally Bioavailable Inhibitor of CSF1R
作者:Barbara Czako、Joseph. R. Marszalek、Jason P. Burke、Pijus Mandal、Paul G. Leonard、Jason B. Cross、Faika Mseeh、Yongying Jiang、Edward Q. Chang、Erika Suzuki、Jeffrey J. Kovacs、Ningping Feng、Sonal Gera、Angela L. Harris、Zhen Liu、Robert A. Mullinax、Jihai Pang、Connor A. Parker、Nakia D. Spencer、Simon S. Yu、Qi Wu、Martin R. Tremblay、Keith Mikule、Keith Wilcoxen、Timothy P. Heffernan、Giulio F. Draetta、Philip Jones
DOI:10.1021/acs.jmedchem.0c00936
日期:2020.9.10
CSF1–CSF1R signaling pathway modulates the production, differentiation, and function of TAMs; however, the discovery of selective CSF1R inhibitors devoid of type III kinase activity has proven to be challenging. We discovered a potent, highly selective, and orally bioavailable CSF1R inhibitor, IACS-9439 (1). Treatment with 1 led to a dose-dependent reduction in macrophages, promoted macrophage polarization
肿瘤相关的巨噬细胞(TAM)在多种人类恶性肿瘤的肿瘤基质中均具有显着存在,并被认为对肿瘤的生长有益。已经提出了靶向CSF1R作为减少TAM,尤其是降低肿瘤,免疫抑制性M2 TAM的潜在疗法。另外,CSF1R在肿瘤细胞上的高表达与某些癌症的不良存活有关,提示肿瘤依赖性,因此是潜在的治疗靶标。CSF1-CSF1R信号通路调节TAM的产生,分化和功能。然而,事实证明,发现缺乏III型激酶活性的选择性CSF1R抑制剂具有挑战性。我们发现了一种有效的,高选择性的,口服生物利用的CSF1R抑制剂IACS-9439(1)。治疗用1导致巨噬细胞剂量依赖性降低,促进巨噬细胞向M1表型极化,并导致MC38和PANC02同基因肿瘤模型中的肿瘤生长抑制。