The Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of ASP3652 in First-in-Human and Ascending Multiple Oral Dose Studies in Healthy Subjects.

Advances in Therapy
Masaomi TakizawaYuichiro Sato

Abstract

Inhibitors of fatty acid amide hydrolase (FAAH) increase the levels of endocannabinoids and have shown analgesic and anti-inflammatory activity in animal models. ASP3652 is a peripherally acting FAAH inhibitor in development for the treatment of chronic bladder and pelvic pain disorders. Here we describe the safety, pharmacokinetics, and pharmacodynamics of single and multiple oral doses of ASP3652 administered in healthy non-elderly and elderly male and female volunteers. Study 1 was a combined single-ascending dose and food-effect study in which ASP3652 was given as single doses (1-600 mg) or matching placebo in healthy subjects. Study 2 was a multiple ascending dose study in which ASP3652 or matching placebo was administered in multiple oral doses (10-300 mg bid and 600 mg qd for 14 days) to healthy subjects. In both studies, the levels of ASP3652, FAAH, endocannabinoids (eCBs) and safety were evaluated. ASP3652 was readily absorbed to reach Cmax at 1 h after a single dose. Steady state was reached within 3 days after the start of multiple dosing. The Cmax and AUC of ASP3652 increased in a slightly more than dose-proportional manner after a single dose of ASP3652 at 30-600 mg. There was some accumulation (15-38%) based on Cm...Continue Reading

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