ABSTRACT
[This corrects the article DOI: 10.1021/acsmedchemlett.7b00157.].
ABSTRACT
Further optimization of an initial DP2 receptor antagonist clinical candidate NVP-QAV680 led to the discovery of a follow-up molecule 2-(2-methyl-1-(4-(methylsulfonyl)-2-(trifluoromethyl)benzyl)-1H-pyrrolo[2,3-b]pyridin-3-yl)acetic acid (compound 11, NVP-QAW039, fevipiprant), which exhibits improved potency on human eosinophils and Th2 cells, together with a longer receptor residence time, and is currently in clinical trials for severe asthma.
ABSTRACT
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.
Subject(s)
Indolizines/chemistry , Receptors, Immunologic/antagonists & inhibitors , Receptors, Prostaglandin/antagonists & inhibitors , Administration, Oral , Animals , CHO Cells , Cricetinae , Cricetulus , Dermatitis, Contact/drug therapy , Disease Models, Animal , Drug Evaluation, Preclinical , Eosinophils/drug effects , Eosinophils/metabolism , Half-Life , Humans , Hypersensitivity/drug therapy , Indolizines/pharmacokinetics , Indolizines/therapeutic use , Mice , Mice, Inbred BALB C , Protein Binding , Rats , Rats, Sprague-Dawley , Receptors, Immunologic/genetics , Receptors, Immunologic/metabolism , Receptors, Prostaglandin/genetics , Receptors, Prostaglandin/metabolism , Structure-Activity Relationship , Th2 Cells/immunology , Th2 Cells/metabolismABSTRACT
The synthesis of a series of indacaterol analogues in which each of the three structural regions of indacaterol are modified in a systematic manner is described. Evaluation of the affinity of these analogues for the ß(2)-adrenoceptor identified the 3,4-dihydroquinolinone and 5-n-butylindanyl analogues to demonstrate the most similar profiles to indacaterol. An α-methyl aminoindane analogue was discovered to be 25-fold more potent than indacaterol, and functional studies revealed an atypical ß(2)-adrenoceptor activation profile for this compound consistent with that of a slowly dissociating 'super agonist'.
Subject(s)
Adrenergic beta-2 Receptor Agonists/pharmacology , Indans/pharmacology , Quinolones/pharmacology , Receptors, Adrenergic, beta-2/metabolism , Adrenergic beta-2 Receptor Agonists/chemical synthesis , Adrenergic beta-2 Receptor Agonists/chemistry , Dose-Response Relationship, Drug , Humans , Indans/chemical synthesis , Indans/chemistry , Molecular Structure , Quinolones/chemical synthesis , Quinolones/chemistry , Structure-Activity RelationshipABSTRACT
High throughput screening identified a 7-azaindole-3-acetic acid scaffold as a novel CRTh2 receptor antagonist chemotype, which could be optimised to furnish a highly selective compound with good functional potency for inhibition of human eosinophil shape change in whole blood and oral bioavailability in the rat.
Subject(s)
Acetates/chemistry , Anti-Inflammatory Agents/chemistry , Pyridines/chemistry , Receptors, Immunologic/antagonists & inhibitors , Receptors, Prostaglandin/antagonists & inhibitors , Acetates/chemical synthesis , Acetates/pharmacokinetics , Administration, Oral , Animals , Anti-Inflammatory Agents/chemical synthesis , Anti-Inflammatory Agents/pharmacokinetics , Eosinophils/drug effects , Eosinophils/immunology , Humans , Microsomes, Liver/metabolism , Permeability , Pyridines/chemical synthesis , Pyridines/pharmacokinetics , Rats , Receptors, Immunologic/metabolism , Receptors, Prostaglandin/metabolism , Structure-Activity RelationshipABSTRACT
High throughput screening identified a phenoxyacetic acid scaffold as a novel CRTh2 receptor antagonist chemotype, which could be optimised to furnish a compound with functional potency for inhibition of human eosinophil shape change and oral bioavailability in the rat.
Subject(s)
Acetates/pharmacology , Receptors, Immunologic/antagonists & inhibitors , Receptors, Prostaglandin/antagonists & inhibitors , Acetates/chemistry , Animals , Biological Availability , Eosinophils/drug effects , Humans , Rats , Structure-Activity RelationshipABSTRACT
Inhibitors of PDE5 are useful therapeutic agents for treatment of erectile dysfunction. A series of novel xanthine derivatives has been identified as potent inhibitors of PDE5, with good levels of selectivity against other PDE isoforms, including PDE6. Studies in the dog indicate excellent oral bioavailability for compound 21.
Subject(s)
3',5'-Cyclic-GMP Phosphodiesterases/antagonists & inhibitors , Xanthines/pharmacology , Animals , Biological Availability , Cattle , Cyclic Nucleotide Phosphodiesterases, Type 5 , Dogs , Enzyme Inhibitors/chemistry , Enzyme Inhibitors/pharmacology , Enzyme Inhibitors/therapeutic use , Erectile Dysfunction/drug therapy , Humans , Inhibitory Concentration 50 , Male , Pharmacokinetics , Protein Isoforms/drug effects , Structure-Activity Relationship , Xanthines/chemistryABSTRACT
A series of novel corticosteroid derivatives featuring C-17 furoate ester functionality have been synthesised. Profiling in vitro and in vivo has resulted in the identification of a compound with a longer duration of action and a lower oral side effect profile in rodents compared to budesonide.
