RESUMO
SIGNIFICANCE: The combined preclinical features of NVL-520 that include potent targeting of ROS1 and diverse ROS1 resistance mutations, high selectivity for ROS1 G2032R over TRK, and brain penetration mark the development of a distinct ROS1 TKI with the potential to surpass the limitations of earlier-generation TKIs for ROS1 fusion-positive patients. This article is highlighted in the In This Issue feature, p. 517.
Assuntos
Carcinoma Pulmonar de Células não Pequenas , Neoplasias Pulmonares , Humanos , Carcinoma Pulmonar de Células não Pequenas/genética , Proteínas Tirosina Quinases/genética , Aminopiridinas , Lactamas Macrocíclicas/farmacologia , Lactamas , Inibidores de Proteínas Quinases/farmacologia , Inibidores de Proteínas Quinases/uso terapêutico , Proteínas Proto-Oncogênicas/genética , Pirazóis , Neoplasias Pulmonares/genética , Encéfalo , MutaçãoRESUMO
Selective activation of dopamine D1 receptors (D1Rs) has been pursued for 40 years as a therapeutic strategy for neurologic and psychiatric diseases due to the fundamental role of D1Rs in motor function, reward processing, and cognition. All known D1R-selective agonists are catechols, which are rapidly metabolized and desensitize the D1R after prolonged exposure, reducing agonist response. As such, drug-like selective D1R agonists have remained elusive. Here we report a novel series of selective, potent non-catechol D1R agonists with promising in vivo pharmacokinetic properties. These ligands stimulate adenylyl cyclase signaling and are efficacious in a rodent model of Parkinson's disease after oral administration. They exhibit distinct binding to the D1R orthosteric site and a novel functional profile including minimal receptor desensitization, reduced recruitment of ß-arrestin, and sustained in vivo efficacy. These results reveal a novel class of D1 agonists with favorable drug-like properties, and define the molecular basis for catechol-specific recruitment of ß-arrestin to D1Rs.
Assuntos
Membrana Celular/efeitos dos fármacos , Agonistas de Dopamina/farmacologia , Receptores de Dopamina D1/agonistas , beta-Arrestinas/metabolismo , Animais , Células CHO , Linhagem Celular , Linhagem Celular Tumoral , Membrana Celular/metabolismo , Cricetinae , Cricetulus , Agonistas de Dopamina/química , Agonistas de Dopamina/metabolismo , Células HEK293 , Humanos , Microscopia de Fluorescência , Estrutura Molecular , Mutação , Ensaio Radioligante/métodos , Receptores de Dopamina D1/genética , Receptores de Dopamina D1/metabolismoRESUMO
γ-Secretase, a four-subunit transmembrane aspartic proteinase, is a highly valued drug target in Alzheimer's disease and cancer. Despite significant progress in structural studies, the respective molecular mechanisms and binding modes of γ-secretase inhibitors (GSIs) and modulators (GSMs) remain uncertain. Here, we developed biotinylated cleavable-linker photoprobes based on the BMS-708163 GSI to study its interaction with γ-secretase. Comparison of four cleavable linkers indicated that the hydrazine-labile N-1-(4,4-dimethyl-2,6-dioxocyclohexylidene)ethyl (Dde) linker was cleaved most efficiently to release photolabeled and affinity-captured presenilin-1 (PS1), the catalytic subunit of γ-secretase. Peptide mapping showed that the BMS-708163-based probe photoinserted at L282 of PS1. This insertion site was consistent with the results of molecular dynamics simulations of the γ-secretase complex with inhibitor. Taken together, this work reveals the binding site of a GSI and offers insights into the mechanism of action of this class of inhibitors.
Assuntos
Secretases da Proteína Precursora do Amiloide/antagonistas & inibidores , Inibidores Enzimáticos/farmacologia , Sondas Moleculares/farmacologia , Oxidiazóis/farmacologia , Sulfonamidas/farmacologia , Secretases da Proteína Precursora do Amiloide/metabolismo , Sítios de Ligação/efeitos dos fármacos , Inibidores Enzimáticos/química , Humanos , Simulação de Dinâmica Molecular , Sondas Moleculares/síntese química , Sondas Moleculares/química , Estrutura Molecular , Oxidiazóis/química , Sulfonamidas/síntese química , Sulfonamidas/químicaRESUMO
QSAR models have been used to evaluate activities for compounds in the phenoxyphenyl-methanamine (PPMA) class of compounds. These models utilize Hammett-type donating-withdrawing substituent values as well as simple parameters to describe substituent size and elucidate the SAR of the 'A' and 'B' rings. Using this methodology, intuitive QSAR relationships were found for the three biological activities with R(2) values of 0.73, 0.45, and 0.58 for 5HT(2A), SerT, and hERG activities.