Lead Sponsor

Biogen

Collaborators

Age

18 - 55 years

Sex

ALL

Healthy Volunteers

No

•Multiple Sclerosis (MS) subjects who have a confirmed diagnosis of relapsing-remitting MS according to McDonald criteria #1-4 and a baseline Expanded Disability Status Scale (EDSS) between 0.0 and 5.0, inclusive, who meet either of the following 2 criteria:
•* Have experienced at least 1 relapse within the 12 months prior to randomization, with a cranial magnetic resonance imaging (MRI) demonstrating lesion(s) consistent with MS , OR
•* Show evidence of gadolinium-enhancing lesions of the brain on an MRI performed within the 6 weeks prior to randomization.

•Diagnosis of primary progressive, secondary progressive, or progressive relapsing MS
•History of malignancy
•History of severe allergic or anaphylactic reactions or known drug hypersensitivity
•History of abnormal laboratory results based on investigator judgment
•History of human immunodeficiency virus (HIV) or other immunodeficient conditions
•History of drug or alcohol abuse within the 2 years prior to randomization
•An MS relapse that has occurred within the 50 days prior to randomization AND/OR the subject has not stabilized from a previous relapse prior to randomization
•Positive screening for active infection with Hepatitis B virus or Hepatitis C virus
•Varicella or herpes zoster virus infection or any severe viral infection within 6 weeks before Screening
•Exposure to varicella zoster virus within 21 days before Screening.
•Abnormal blood tests at Screening: Hemoglobin ≤9.0 g/dL, Platelets ≤100 × 10\^9/L, Lymphocytes ≤1.0 × 10\^9/L, Neutrophils ≤1.5 × 10\^9/L, alanine aminotransferase/serum glutamate pyruvate transaminase (ALT/SGPT), aspartate aminotransferase/serum glutamic oxaloacetic transaminase (AST/SGOT), or gamma-glutamyl-transferase \>2 times the upper limit of normal (ULN) and serum creatinine \>ULN.