GSK256066 is a reversible and cAMP-competitive phosphodiesterase 4 (PDE4) inhibitor that targets all PDE4 subtypes with high affinity (IC50 = 53.7 pM against 2 nM [3H]-rolipram for binding HRBS in rat brain cytosol), potency and selectivity (pIC50 ≥11.31/11.5/11.42/11.94 against PDE4A/B/C/D vs. pIC50 = 5.73/5.92/5.93/5.39/5.28/8.11 against PDE1/2/3/5/6/7 by SPA assays). GSK256066 effectively inhibits LPS-induced TNFα production from human whole blood and isolated PBMCs (pIC50 = 126 and 10 pM, respectively) in vitro and acute pulmonary neutrophilia in rats in vivo (ED50 = 1.1 μg/kg, administered intratracheally 2 hrs priror to LPS). GSK256066 is shown to be more potent than Cilomilast (SB-207499) and Roflumilast in both cell-free and cell-based assays.
Highly potent and selective phosphodiesterase 4 (PDE4) inhibitor that inhibits LPS-induced inflammatory response both in cultures and in rats in vivo.
GSK256066 is a selective phosphodiesterase 4 inhibitor that can be given by inhalation, minimising the potential for side effects. We evaluated the effects of GSK256066 on airway responses to allergen challenge in mild asthmatics. In a randomised, double blind, cross-over
CD8 lymphocytes play an important role in the pathogenesis of COPD. Corticosteroids and phosphodiesterase 4 (PDE4) inhibitors are anti-inflammatory drugs used for COPD treatment. Little is known of the combined effect of these drugs on COPD CD8 cells. We studied
The Journal of pharmacology and experimental therapeutics, 337(1), 145-154 (2011-01-06)
Oral phosphodiesterase (PDE) 4 inhibitors such as roflumilast have established the potential of PDE4 inhibition for the treatment of respiratory diseases. However, PDE4 inhibitor efficacy is limited by mechanism-related side effects such as emesis and nausea. Delivering the inhibitor by
Crystallography driven optimisation of a lead derived from similarity searching of the GSK compound collection resulted in the discovery of quinoline-3-carboxamides as highly potent and selective inhibitors of phosphodiesterase 4B. This series has been optimized to GSK256066, a potent PDE4B
The Journal of pharmacology and experimental therapeutics, 337(1), 137-144 (2011-01-06)
Oral phosphodiesterase (PDE) 4 inhibitors have demonstrated clinical efficacy in chronic obstructive pulmonary disease and asthma. Preclinical and clinical investigation of inhaled PDE4 inhibitors is ongoing. 6-({3-[(Dimethylamino)carbonyl]phenyl}sulfonyl)-8-methyl-4-{[3-methyloxy)phenyl]amino}-3-quinolinecarboxamide (GSK256066) is an exceptionally high-affinity and selective inhibitor of PDE4 designed for inhaled
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