RESUMO
Optimization of a 7-azaindole-3-acetic acid CRTh2 receptor antagonist chemotype derived from high throughput screening furnished a highly selective compound NVP-QAV680 with low nM functional potency for inhibition of CRTh2 driven human eosinophil and Th2 lymphocyte activation in vitro. The molecule exhibited good oral bioavailability in the rat, combined with efficacy in rodent CRTh2-dependent mechanistic and allergic disease models and was suitable for clinical development.
Assuntos
Indolizinas/química , Receptores Imunológicos/antagonistas & inibidores , Receptores de Prostaglandina/antagonistas & inibidores , Administração Oral , Animais , Células CHO , Cricetinae , Cricetulus , Dermatite de Contato/tratamento farmacológico , Modelos Animais de Doenças , Avaliação Pré-Clínica de Medicamentos , Eosinófilos/efeitos dos fármacos , Eosinófilos/metabolismo , Meia-Vida , Humanos , Hipersensibilidade/tratamento farmacológico , Indolizinas/farmacocinética , Indolizinas/uso terapêutico , Camundongos , Camundongos Endogâmicos BALB C , Ligação Proteica , Ratos , Ratos Sprague-Dawley , Receptores Imunológicos/genética , Receptores Imunológicos/metabolismo , Receptores de Prostaglandina/genética , Receptores de Prostaglandina/metabolismo , Relação Estrutura-Atividade , Células Th2/imunologia , Células Th2/metabolismoRESUMO
Screening of one-bead one-compound libraries by incubating beads with fluorescently labeled target protein requires isolation and structure elucidation of a large number of primary hit beads. However, the potency of the identified ligands is only revealed after time consuming and expensive larger scale resynthesis and testing in solution. Often, many of the resynthesized compounds turn out to be weak target binders in solution due to large differences between surface and solution binding affinities. For an industry style high-throughput screening (HTS) process a high false positive rate is detrimental. We have therefore combined single bead and single molecule/single cell techniques into an integrated HTS process in which the picomole amount of substance contained on one isolated hit bead is sufficient for quality control, structure determination, and precise affinity determination to the target protein in solution.