A Proof-of-concept Study to Examine QUC398 in Participants With Knee OA

Who can take part

• Weight ≥ 50 kg and body mass index 18 -35 kg/m2 at Screening 1
• Kellgren-Lawrence grade 2 to 4 in the tibio-femoral compartment in the target knee confirmed by radiography in standing weight-bearing fixed flexion position and posterior-anterior view, at Screening 1
• mJSN 1-2 in the medial tibiofemoral compartment of the target knee, confirmed with Xray by central reader at Screening 1
• Symptomatic OA with moderate to severe pain (corresponding to Pain NRS ≥ 5 to ≤ 9) in the target knee for the majority of days in the last 3 months prior to Screening 1, as per participant's judgement
• Symptomatic OA with moderate to severe pain (corresponding to Pain NRS ≥ 5 to ≤ 9) in the target knee at Screening 1 and 2
• Moderate to severe OA pain (corresponding to Pain NRS ≥5 to ≤9) in the target knee during the last 7 days prior to Screening 3, confirmed by:; Completed pain diary for at least 6 of the last 7 days prior to Screening 3, AND Diary reported Pain NRS ≥5 to ≤9 for at least 6 of the last 7 days prior to Screening 3
• KOOS pain subscale ≤ 60 in the target knee at Screening 1, Screening 2, and Screening 3

Who cannot take part

• Painful ipsilateral hip OA defined as a Pain NRS ≥3 on the majority of days in the last 3 months prior to Screening 1, as reported by the patient
• Previous exposure to any ADAMTS-5 drug, including QUC398
• Symptomatic, patello-femoral pain in the target knee as per investigator's examination at Screening 1
• Severe malalignment > 7.5º in the target knee (either varus or valgus), measured using standardized knee X-ray at Screening 1
• Patient unable or unwilling to undergo MRI or presenting absolute contraindications to MRI
• History or current diagnosis of ECG abnormalities; Other protocol-defined inclusion/exclusion criteria may apply