Exploratory Study of the Safety, Tolerability and Efficacy of Multiple Regimens of Natalizumab in Adult Participants With Relapsing Multiple Sclerosis (MS) (REFINE)
Relapsing-Remitting Multiple Sclerosis
About this trial
This is an interventional treatment trial for Relapsing-Remitting Multiple Sclerosis
Eligibility Criteria
Key Inclusion Criteria:
- Ability to provide written informed consent
- Subjects of childbearing potential must practice effective contraception during the study
- A documented diagnosis of Relapsing Remitting Multiple Sclerosis (RRMS)
- Free of MS relapse for 12 months prior to randomization
- Treatment with natalizumab for a minimum of 12 months immediately prior to randomization.
- In the 12 months prior to commencing natalizumab, subject must have experienced a minimal level of disease activity as defined by 2 or more documented clinical relapses OR 1 relapse and documented MRI activity, defined by the presence of at least 1 Gd enhancing lesion on MRI, unrelated to the relapse.
Key Exclusion Criteria:
- Known history of Human Immunodeficiency Virus (HIV), hepatitis C and/or hepatitis B virus
- Positive for anti-natalizumab antibodies at screening
- MRI positive for Gd-enhancing lesions at study entry
- Subjects for whom MRI is contraindicated
- History of any clinically significant cardiac, endocrinologic, hematologic, hepatic, immunologic, metabolic (including diabetes), urologic, pulmonary, neurologic (except for RRMS), dermatologic, psychiatric, renal, or other major disease
- History of malignant disease, including solid tumors and hematologic malignancies (with the exception of cured basal cell and squamous cell carcinomas of the skin)
- History of transplantation or any anti-rejection therapy
- History of severe allergic or anaphylactic reactions or known hypersensitivity to any drug
- A clinically significant infectious illness within 30 days prior to screening or progressive multifocal leukoencephalopathy (PML) or other opportunistic infections at any time
- Signs or symptoms suggestive of any serious infection, based on medical history, physical examination or laboratory testing
NOTE: Other protocol defined Inclusion/Exclusion criteria may apply.
Sites / Locations
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Arms of the Study
Arm 1
Arm 2
Arm 3
Arm 4
Arm 5
Arm 6
Active Comparator
Experimental
Experimental
Experimental
Experimental
Experimental
Natalizumab 300 mg Intravenous (IV) Every 4 Weeks
Natalizumab 300 mg Subcutaneous (SC) Every 4 Weeks
Natalizumab 300 mg IV Every 12 Weeks
Natalizumab 300 mg SC Every 12 Weeks
Natalizumab 150 mg IV Every 12 Weeks
Natalizumab 150 mg SC Every 12 Weeks
Natalizumab 300 mg IV every 4 weeks for 60 weeks. Open-label natalizumab treatment 300 mg IV at Weeks 60, 64, and 68.
Natalizumab 300 mg SC every 4 weeks for 60 weeks. Open-label natalizumab treatment 300 mg IV at Weeks 60, 64, and 68.
Natalizumab 300 mg IV every 12 weeks for 60 weeks with matching IV placebo administered during the intervening 4-week periods. Open-label natalizumab treatment 300 mg IV at Weeks 60, 64, and 68.
Natalizumab 300 mg SC every 12 weeks for 60 weeks with matching SC placebo administered during the intervening 4-week periods. Open-label natalizumab treatment 300 mg IV at Weeks 60, 64, and 68.
Natalizumab 150 mg IV every 12 weeks for 60 weeks with matching IV placebo administered during the intervening 4-week periods. Open-label natalizumab treatment 300 mg IV at Weeks 60, 64, and 68.
Natalizumab 150 mg SC every 12 weeks for 60 weeks with matching SC placebo administered during the intervening 4-week periods. Open-label natalizumab treatment 300 mg IV at Weeks 60, 64, and 68.