Fasitibant Intra-articular Injection in Patients With Symptomatic Osteoarthritis of the Knee

Study Summary

This study is designed as a double-blind, randomised, placebo-controlled, four parallel arm, dose-finding study, to be conducted in approximately 26 sites, to evaluate the efficacy, safety, tolerability, and pharmacokinetics of single intra-articular (IA) injections of fasitibant in patients with symptomatic osteoarthritis (OA) of the knee. Approximately 400 male and female patients 40-80 years old, with BMI \< 30 kg/m² and with a clinical diagnosis of symptomatic primary osteoarthritis of the knee will be randomised to a total of 4 treatment arms. Each arm includes a single intra-articular injection of one of three dosages of fasitibant (low, intermediate and high dose) OR placebo. The randomisation ratio will be 1:1:1:1. The primary efficacy variable will be the change of the Western Ontario and McMaster Universities Visual Analogue Scale 3.1 A (WOMAC VA 3.1 A) (total pain) subscore from baseline up to 2 weeks after randomisation. Safety will be assessed by monitoring adverse events and clinical laboratory tests; local tolerability at the injection site will also be assessed. In addition, the population pharmacokinetics and the exposure-response relationship will be evaluated. The individual experimental clinical phase will last up to maximal 15 weeks encompassing 7 planned visits at site, including screening, randomisation, 4 follow-up visits and the End of study visit.

Primary Outcome

The validated Western Ontario and McMaster University questionnaire (WOMAC) was used to measure total knee pain choosing its visual analogue scale version (VAS). The WOMAC VA 3.1 A subscore (WOMAC A) ranges from 0 to 500 mm (summing up five VAS 0-100 mm) with higher scores indicating more pain.

Interventions

• DRUG Placebo comparator
• DRUG Fasitibant- low dose
• DRUG Fasitibant- intermediate dose
• DRUG Fasitibant- high dose