Study of Efficacy and Safety of Canakinumab in Patients With Hereditary Periodic Fevers

This study is to determine whether canakinumab is able to induce and maintain a clinically meaningful reduction of disease activity in participants with Hereditary Periodic Fevers (HPF) compared to placebo.

This study consists of 3 randomized cohorts (one per condition of colchicine resistant/intolerant Familial Mediterranean Fever (crFMF), Hyper Immunoglobulin D Syndrome (also known as mevalonate kinase deficiency (HIDS/MKD), and Tumor Necrosis Factor Receptor Associated Periodic Syndrome (TRAPS), and 4 study epochs:

1. Epoch 1: a screening epoch to assess participant's eligibility;
2. Epoch 2: a randomized treatment epoch of 16 weeks where participants are randomized to canakinumab 150 mg every 4 weeks (q4w) or to placebo to obtain efficacy and safety data in a double-blind placebo controlled parallel-arm setting. This epoch contained 2 possible escape options :

   1. early blinded escape option for non responders from Day 8 to Day 28 with here an add-on dose of 150mg canakinumab followed by blinded uptitration at the next scheduled visit (Day 29)
   2. late unblinded escape option for non responders from Day 29 to Day 112; with open-label uptitration
3. Epoch 3: a randomized withdrawal epoch of 24 weeks where canakinumab responders from the randomized treatment epoch were re-randomized to canakinumab 150mg q8w or placebo to assess the potential for canakinumab to maintain clinical efficacy at a reduced dosing frequency;
4. Epoch 4: an open-label treatment epoch of 72 weeks to collect long-term

Eligibility Criteria:
Inclusion Criteria: - Patient's written informed consent (or parent's written informed consent in case of pediatric patient) at screening - Male and female patients at least 2 years of age at the time of the screening visit. Male and female patients \>28 days but \<2 years eligible for open label treatment only. - Confirmed diagnosis and active flare at randomization - CRP \>10mg/L at randomization

Exclusion Criteria: - Use of the following therapies (within varying protocol defined timeframes): Corticosteroids, anakinra, canakinumab, rilonacept, tocilizumab, TNF inhibitors, abatacept, tofacitinib, rituximab, leflunomide, thalidomide, cyclosporine, intravenous immunoglobulin, 6-Merceptopurine, azathioprine, cyclophosphamide, or chlorambucil, any other investigational biologics - History of malignancy of any organ system (other than localized basal cell carcinoma of the skin or in - situ cervical cancer), treated or untreated - Significant medical diseases, including but not limited to the following: a. History of organ transplantation b. Elevated liver enzymes ≥3x ULN d. Increase in total bilirubin e. Serious hepatic disorder (Child-Pugh scores B or C) f. Chronic Kidney Disease g. Thyroid disease h. Diagnosis of active peptic ulcer disease i. Coagulopathy j. Significant CNS effects including vertigo and dizziness - Any conditions or significant medical problems which immunecompromise the patient and/or places the patient at unacceptable risk for immunomodulatory therapy - Live vaccinations within 3 months prior to the start of the trial, during the trial, and up to 3 months following the last dose