RESUMO
Inhibition of mutant B-Raf signaling, through either direct inhibition of the enzyme or inhibition of MEK, the direct substrate of Raf, has been demonstrated preclinically to inhibit tumor growth. Very recently, treatment of B-Raf mutant melanoma patients with a selective B-Raf inhibitor has resulted in promising preliminary evidence of antitumor activity. This article describes the design and optimization of tetrahydronaphthalene-derived compounds as potent inhibitors of the Raf pathway in vitro and in vivo. These compounds possess good pharmacokinetic properties in rodents and inhibit B-Raf mutant tumor growth in mouse xenograft models.
Assuntos
Antineoplásicos/síntese química , Proteínas Proto-Oncogênicas B-raf/antagonistas & inibidores , Tetra-Hidronaftalenos/síntese química , Administração Oral , Animais , Antineoplásicos/química , Antineoplásicos/farmacologia , Disponibilidade Biológica , Cristalografia por Raios X , Desenho de Fármacos , Melanoma Experimental/tratamento farmacológico , Melanoma Experimental/enzimologia , Melanoma Experimental/patologia , Camundongos , Camundongos Nus , Modelos Moleculares , Mutação , Proteínas Proto-Oncogênicas B-raf/genética , Estereoisomerismo , Relação Estrutura-Atividade , Tetra-Hidronaftalenos/química , Tetra-Hidronaftalenos/farmacologia , Ensaios Antitumorais Modelo de XenoenxertoRESUMO
The identification and optimization of a series of acylguanidine-based melanocortin-4 receptor antagonists is discussed.
Assuntos
Guanidina/química , Receptor Tipo 4 de Melanocortina/antagonistas & inibidores , Compostos de Sulfidrila/química , Animais , Sítios de Ligação , Encéfalo/metabolismo , Guanidina/análogos & derivados , Guanidina/farmacologia , Concentração Inibidora 50 , Camundongos , Plasma/metabolismo , Relação Estrutura-Atividade , Compostos de Sulfidrila/farmacologia , Fatores de TempoRESUMO
The melanocortin 4 receptor (MC4R) plays an important role in body weight regulation and energy homeostasis. Administration of peptidic MC4R antagonists (usually by intracerebro ventricular injection) has been shown in the literature to increase body weight and/or food intake in several rodent models. We report here the identification of a novel nonpeptidic MC4R antagonist and its effects on tumor-induced weight loss in mice following peripheral administration.