RESUMO
We explored novel immunosuppressive agents with immune tolerance using a phenotypic drug discovery strategy, focusing on costimulatory molecules in T cells, and obtained triazolothienodiazepine derivatives. Their mechanism of action is to inhibit the bromodomain and extra-terminal domain (BET) family, as we have previously reported. Selective inhibition of the first bromodomain (BD1) of the BET family is expected to exert antitumor and immunosuppressive effects, similar to BET inhibitors. This study identified furopyridine derivatives 7 and 8 with high BD1 inhibitory activity and high selectivity over BD2. Compound 7 was found to be orally bioavailable and exhibited anti-inflammatory activity in a lipopolysaccharide-induced model.
Assuntos
Piridinas , Piridinas/química , Piridinas/farmacologia , Piridinas/síntese química , Animais , Humanos , Administração Oral , Relação Estrutura-Atividade , Camundongos , Descoberta de Drogas , Lipopolissacarídeos/farmacologia , Lipopolissacarídeos/antagonistas & inibidores , Estrutura Molecular , Ratos , Domínios ProteicosRESUMO
Clinical studies have shown that inhibitors of bromodomain and extra-terminal domain (BET) proteins, particularly BRD4, have antitumor activity and efficacy. The BET protein has two domains, BD1 and BD2, and we previously focused on BD1 and reported orally bioavailable BD1-selective inhibitors. In this study, we obtained a BD1 inhibitor, a more potent and highly selective pyrazolopyridone derivative 13a, and confirmed its in vivo efficacy.
Assuntos
Piridonas , Humanos , Administração Oral , Relação Estrutura-Atividade , Animais , Piridonas/química , Piridonas/farmacologia , Piridonas/síntese química , Piridonas/farmacocinética , Pirazóis/química , Pirazóis/farmacologia , Pirazóis/síntese química , Descoberta de Drogas , Fatores de Transcrição/antagonistas & inibidores , Fatores de Transcrição/metabolismo , Estrutura Molecular , Proteínas de Ciclo Celular/antagonistas & inibidores , Proteínas de Ciclo Celular/metabolismo , Camundongos , Domínios Proteicos , Relação Dose-Resposta a Droga , Antineoplásicos/química , Antineoplásicos/farmacologia , Antineoplásicos/síntese química , Ratos , Proteínas que Contêm BromodomínioRESUMO
A phenotypic screening of thienodiazepines derived from a hit compound found through a binding assay targeting co-stimulatory molecules on T cells and antigen presenting cells successfully led to the discovery of a thienotriazolodiazepine compound (7f) possessing potent immunosuppressive activity. A chemical biology approach has succeeded in revealing that 7f is a first inhibitor of epigenetic bromodomain-containing proteins. 7f is expected to become an anti-cancer agent as well as an immunosuppressive agent.