The in vitro pharmacology of GS-5759, a novel bifunctional phosphodiesterase 4 inhibitor and long acting β2-adrenoceptor agonist
| Autor: | Michael Salmon, Leena Patel, Stacey L. Tannheimer, Clifford D. Wright, Musong Kim, Gary B. Phillips, Zhi Hua Cui, William R. Baker, Eric A. Sorensen |
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| Rok vydání: | 2014 |
| Předmět: |
Agonist
Lipopolysaccharides Male Carbachol Time Factors medicine.drug_class Guinea Pigs Respiratory System Cell Culture Techniques Pharmacology Quinolones Peripheral blood mononuclear cell Proinflammatory cytokine Pulmonary Disease Chronic Obstructive medicine Animals Humans Sulfones Adrenergic beta-2 Receptor Agonists Roflumilast chemistry.chemical_classification Molecular Structure Antagonist Muscle Smooth Fibroblasts Enzyme chemistry Leukocytes Mononuclear Molecular Medicine Cytokines Tumor necrosis factor alpha Phosphodiesterase 4 Inhibitors medicine.drug |
| Zdroj: | The Journal of pharmacology and experimental therapeutics. 349(1) |
| ISSN: | 1521-0103 |
| Popis: | Inhaled long-acting β(2)-adrenoceptor agonists (LABA) that act as bronchodilators and the oral anti-inflammatory phosphodiesterase 4 (PDE4) inhibitor roflumilast are both approved therapies for chronic obstructive pulmonary disease (COPD). Here we describe the activity of a novel, inhaled, bifunctional, small molecule (R)-6-[(3-{[4-(5-{[2-hydroxy-2-(8-hydroxy-2-oxo-1,2-dihydroquinolin-5-yl)ethyl]amino}pent-1-yn-1-yl)phenyl]carbamoyl}phenyl)sulfonyl]-4-[(3-methoxyphenyl)amino]-8-methylquinoline-3-carboxamide (GS-5759), which has specific β(2) agonist and PDE4 inhibitory activity. GS-5759 demonstrated potent and full agonist activity at β(2) adrenoceptors (EC(50) = 8 ± 4 nM) and is a potent inhibitor of the PDE4 enzyme (IC(50) = 5 ± 3 nM). In cell assays, GS-5759 inhibited lipopolysaccharide (LPS)-induced tumor necrosis factor α (TNFα) production in human peripheral mononuclear cells (PBMC) with an IC(50) = 0.3 nM [confidence interval (CI) 0.1-0.6] and in human neutrophils formyl-methionyl-leucyl-phenylalanine (fMLP)-induced super oxide anion production with an IC(50) = 3 nM (CI 0.8-8). The addition of the β(2) antagonist ICI 118551 shifted the IC(50) in these cell assays to 4 and 38 nM, respectively, demonstrating the contribution of both β(2) agonist and PDE4 inhibitory activity to GS-5759. GS-5759 was also a potent inhibitor of profibrotic and proinflammatory mediator release from human lung fibroblasts. GS-5759 relaxed guinea pig airway smooth muscle strips precontracted with carbachol in a concentration-dependent manner with an EC(50) = 0.5 µM (CI 0.2-2) and had slow dissociation kinetics with an Off T(1/2) > 720 minutes at an EC(80) concentration of 3 µM. GS-5759 is a novel bifunctional molecule with both potent β(2) agonist and PDE4 inhibitor activity that could provide inhaled bronchodilator and anti-inflammatory therapy for COPD. |
| Databáze: | OpenAIRE |
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