Pharmacokinetic and Pharmacodynamic Study of FX006 in Patients With Osteoarthritis of the Knee

A Double-Blind, Randomized, Parallel Group, Active Comparator Study to Evaluate the Safety, Pharmacokinetics, and Pharmacodynamic Effects (HPA Axis) of FX006 in Patients With Osteoarthritis of the Knee

The purpose of this study was to evaluate the safety, pharmacokinetics and pharmacodynamics of FX006 in patients with osteoarthritis of the knee.

This study was a double-blind, randomized, parallel-group, active comparator design. The study was conducted in male and female patients ≥35 years of age with symptomatic OA of the knee.

Twenty-four (24) patients with knee OA were randomized (1:1:1:1) and treated with a single IA injection of either 10, 40, or 60 mg of FX006 or 40 mg of TCA IR.

Each patient was evaluated for a total of 6 weeks following a single IA injection. Following screening, safety, PK and pharmacodynamics (PD) were evaluated during one (1) 48-hour in-patient period (Day -1 to Day 2), two (2) 24-hour in-patient periods (Day 14-15 and Day 42-43) and seven (7) out-patient visits (Days 3, 4, 5, 8, 22, 29 and 36).

Main Inclusion Criteria:

• Willingness and ability to comply with the study procedures and visit schedules and ability to follow verbal and written instructions
• Male or female >=35 years of age
• Diagnosis of unilateral or bilateral OA of the knee for at least 6 months prior to Screening with confirmation of OA according to American College of Rheumatology Criteria for Classification of Idiopathic OA of the Knee (clinical and radiological) based on an X-ray performed within 6 months prior to Screening or during the Screening period
• Body mass index (BMI) ≤ 40 kg/m2
• Willingness to abstain from use of the protocol-specified restricted medications

Main Exclusion Criteria:

• History of Reiter's syndrome, rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, arthritis associated with inflammatory bowel disease, sarcoidosis or amyloidosis
• History of arthritides due to crystals (e.g., gout, pseudogout)
• History of infection in the index joint
• Clinical signs and symptoms of active knee infection or crystal disease of the index knee
• Presence of surgical hardware or other foreign body in the index knee
• Unstable joint (such as a torn anterior cruciate ligament)
• IA corticosteroid (investigational or marketed) in any joint within 3 months of Screening
• IA hyaluronic acid (investigational or marketed) in the index knee within 6 months of Screening
• Oral, inhaled or intranasal corticosteroids (investigational or marketed) within 1 month of Screening
• Prior arthroscopic or open surgery of the index knee within 12 months of Screening
• Planned/anticipated surgery of the index knee during the study period
• History of or active malignancy, with the exception of resected basal cell carcinoma, squamous cell carcinoma of the skin, or resected cervical atypia or carcinoma in situ within 5 years
• Insulin-dependent diabetes
• History of or active Cushing's syndrome
• Any other clinically significant acute or chronic medical conditions (e.g., uncontrolled diabetes)
• Skin breakdown at the knee where the injection would take place
• Women of child-bearing potential not using effective contraception or who are pregnant or nursing