The in vivo efficacy and side effect pharmacology of GS-5759, a novel bifunctional phosphodiesterase 4 inhibitor and long-acting β2-adrenoceptor agonist in preclinical animal species

نویسندگان

  • Michael Salmon
  • Stacey L Tannheimer
  • Terry T Gentzler
  • Zhi-Hua Cui
  • Eric A Sorensen
  • Kimberly C Hartsough
  • Musong Kim
  • Lafe J Purvis
  • Edward G Barrett
  • Jacob D McDonald
  • Karin Rudolph
  • Melanie Doyle-Eisele
  • Philip J Kuehl
  • Christopher M Royer
  • William R Baker
  • Gary B Phillips
  • Clifford D Wright
چکیده

Bronchodilators are a central therapy for symptom relief in respiratory diseases such as chronic obstructive pulmonary disease (COPD) and asthma, with inhaled β 2-adrenoceptor agonists and anticholinergics being the primary treatments available. The present studies evaluated the in vivo pharmacology of (R)-6-[[3-[[4-[5-[[2-Hydroxy-2-(8-hydroxy-2-oxo-1,2-dihydroquinolin-5-yl)ethyl]amino]pent-1-ynyl]phenyl]carbamoyl]phenyl]sulfonyl]-4-[(3-methoxyphenyl)amino]-8-methylquinoline-3-carboxamide (GS-5759), a novel bifunctional compound with both phosphodiesterase 4 (PDE4) inhibitor and long-acting β 2-adrenoceptor agonist (LABA) activity, which has been optimized for inhalation delivery. GS-5759 dose-dependently inhibited pulmonary neutrophilia in a lipopolysaccharide (LPS) aerosol challenge model of inflammation in rats with an ED50 ≤ 10 μg/kg. GS-5759 was also a potent bronchodilator with an ED50 of 0.09 μg/kg in guinea pigs and 3.4 μg/kg in dogs after methylcholine (MCh) and ragweed challenges respectively. In cynomolgus monkeys, GS-5759 was dosed as a fine-particle dry powder and was efficacious in the same dose range in both MCh and LPS challenge models, with an ED50 = 70 μg/kg for bronchodilation and ED50 = 4.9 μg/kg for inhibition of LPS-induced pulmonary neutrophilia. In models to determine therapeutic index (T.I.), efficacy for bronchodilation was evaluated against increased heart rate and GS-5759 had a T.I. of 700 in guinea pigs and >31 in dogs. In a ferret model of emesis, no emesis was seen at doses several orders of magnitude greater than the ED50 observed in the rat LPS inflammation model. GS-5759 is a bifunctional molecule developed for the treatment of COPD, which has both bronchodilator and anti-inflammatory activity and has the potential for combination as a triple therapy with a second compound, within a single inhalation device.

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The in vitro pharmacology of GS-5759, a novel bifunctional phosphodiesterase 4 inhibitor and long acting β2-adrenoceptor agonist.

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عنوان ژورنال:

دوره 2  شماره 

صفحات  -

تاریخ انتشار 2014