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- W2088957014 abstract "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 delivery. The aim of these studies was to investigate the potency, duration of action, and therapeutic index of GSK256066 in animal models of pulmonary inflammation. The effects of intratracheally administered GSK256066 were investigated in rat lipopolysaccharide (LPS)- and ovalbumin (OVA)-induced models of acute pulmonary inflammation. In some studies, fluticasone propionate (FP) was included as a comparator. The therapeutic index (anti-inflammatory effect versus emesis) of GSK256066 was studied in ferrets where acute pulmonary inflammation was induced with inhaled LPS. In rats, GSK256066 and FP caused significant (p < 0.05) inhibition of LPS-induced pulmonary neutrophilia. The duration of action of GSK256066 at 10 × ED(50) dose (10 μg/kg) was 12 h. GSK256066 and FP also inhibited LPS-induced increases in exhaled nitric oxide (ED(50) 35 and 92 μg/kg, respectively). In addition, GSK256066 inhibited pulmonary eosinophilia in rats exposed to OVA (ED(50) 0.4 μg/kg). In ferrets, inhaled GSK256066 inhibited LPS-induced pulmonary neutrophilia (ED(50) 18 μg/kg), and no emetic episodes were observed. Thus, GSK256066 may have an improved therapeutic index compared with oral PDE4 inhibitors, e.g., cilomilast and roflumilast. In summary, GSK256066 demonstrates potent and long-lasting anti-inflammatory effects in animal models of pulmonary inflammation and does not induce emetic episodes in ferrets. GSK256066 has potential as an inhaled therapeutic for the treatment of asthma and chronic obstructive pulmonary disease." @default.
- W2088957014 created "2016-06-24" @default.
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- W2088957014 date "2011-01-04" @default.
- W2088957014 modified "2023-10-02" @default.
- W2088957014 title "In Vivo Characterization of GSK256066, a High-Affinity Inhaled Phosphodiesterase 4 Inhibitor" @default.
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- W2088957014 doi "https://doi.org/10.1124/jpet.110.173641" @default.
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