RESUMO
PIM kinases have become targets of interest due to their association with biochemical mechanisms affecting survival, proliferation and cytokine production. 1,2,3-Triazolo[4,5-b]pyridines were identified as PIM inhibitors applying a scaffold hopping approach. Initial exploration around this scaffold and X-ray crystallographic data are hereby described.
Assuntos
Desenho de Fármacos , Modelos Moleculares , Inibidores de Proteínas Quinases/síntese química , Proteínas Proto-Oncogênicas c-pim-1/antagonistas & inibidores , Piridinas/síntese química , Triazóis/síntese química , Ativação Enzimática/efeitos dos fármacos , Interações Hidrofóbicas e Hidrofílicas , Concentração Inibidora 50 , Estrutura Molecular , Inibidores de Proteínas Quinases/química , Inibidores de Proteínas Quinases/farmacologia , Piridinas/química , Piridinas/farmacologia , Triazóis/química , Triazóis/farmacologiaRESUMO
Phosphoinositide-3-kinases (PI3K) are a family of lipid kinases mediating numerous cell processes such as proliferation, migration and differentiation. PI3K is an important target for cancer therapeutics due to the deregulation of this signaling pathway in a wide variety of human cancers. Herein, we describe the rapid identification of ETP-46992, within 2-aminocarbonyl imidazo [1,2-a] pyrazine series, with suitable pharmacokinetic (PK) properties that allows the establishment of mechanism of action and efficacy in vivo studies. ETP-46992 showed tumor growth inhibition in a GEMM mouse tumor model driven by a K-Ras(G12V) oncogenic mutation and in tumor xenograft models with PI3K pathway deregulated (BT474).
Assuntos
Imidazóis/química , Inibidores de Fosfoinositídeo-3 Quinase , Inibidores de Proteínas Quinases/química , Pirazinas/química , Serina-Treonina Quinases TOR/antagonistas & inibidores , Administração Oral , Animais , Apoptose/efeitos dos fármacos , Linhagem Celular Tumoral , Citocromos/metabolismo , Modelos Animais de Doenças , Meia-Vida , Humanos , Imidazóis/síntese química , Imidazóis/farmacocinética , Camundongos , Camundongos Endogâmicos BALB C , Microssomos Hepáticos/metabolismo , Neoplasias/tratamento farmacológico , Fosfatidilinositol 3-Quinases/metabolismo , Inibidores de Proteínas Quinases/farmacocinética , Inibidores de Proteínas Quinases/uso terapêutico , Pirazinas/síntese química , Pirazinas/farmacocinética , Serina-Treonina Quinases TOR/metabolismo , Transplante HeterólogoRESUMO
The PI3K/AKT/mTOR and PIM kinase pathways contribute to the development of several hallmarks of cancer. Cotargeting of these pathways has exhibited promising synergistic therapeutic effects in liquid and solid tumor types. To identify molecules with combined activities, we cross-screened our collection of PI3K/(±mTOR) macrocycles (MCXs) and identified the MCX thieno[3,2-d]pyrimidine derivative 2 as a moderate dual PI3K/PIM-1 inhibitor. We report the medicinal chemistry exploration and biological characterization of a series of thieno[3,2-d]pyrimidine MCXs, which led to the discovery of IBL-302 (31), a potent, selective, and orally bioavailable triple PI3K/mTOR/PIM inhibitor. IBL-302, currently in late preclinical development (AUM302), has recently demonstrated efficacy in neuroblastoma and breast cancer xenografts. Additionally, during the course of our experiments, we observed that macrocyclization was essential to obtain the desired multitarget profile. As a matter of example, the open precursors 35-37 were inactive against PIM whereas MCX 28 displayed low nanomolar activity.