Abstract：
:Tumor-associated macrophages (TAMs) have a significant presence in the tumor stroma across multiple human malignancies and are believed to be beneficial to tumor growth. Targeting CSF1R has been proposed as a potential therapy to reduce TAMs, especially the protumor, immune-suppressive M2 TAMs. Additionally, the high expression of CSF1R on tumor cells has been associated with poor survival in certain cancers, suggesting tumor dependency and therefore a potential therapeutic target. The 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 toward the M1 phenotype, and led to tumor growth inhibition in MC38 and PANC02 syngeneic tumor models.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Czako B,Marszalek JR,Burke JP,Mandal P,Leonard PG,Cross JB,Mseeh F,Jiang Y,Chang EQ,Suzuki E,Kovacs JJ,Feng N,Gera S,Harris AL,Liu Z,Mullinax RA,Pang J,Parker CA,Spencer ND,Yu SS,Wu Q,Tremblay MR,Mikule K,Widoi
10.1021/acs.jmedchem.0c00936subject
Has Abstractpub_date
2020-09-10 00:00:00pages
9888-9911issue
17eissn
0022-2623issn
1520-4804journal_volume
63pub_type
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