BG00010 (Neublastin) Phase 2 Multiple Dose Adaptive Design in Participants With Painful Lumbar Radiculopathy

During the study, frequent assessment of allocation probability will be conducted to guide
subsequent randomization of participants into dose groups.

Key Inclusion Criteria:

- Body weight ≤133 kg.

- Leg pain radiating, diagnosed as being due to painful lumbar radiculopathy or
lumbosacral radiculopathy, the diagnosis of which occurred within ≥6 months and ≤5
years of the time of randomization.

- Objective, documented evidence of painful lumbar radiculopathy involvement

- Lower back pain

- Leg pain

- Male and female subjects of childbearing potential must practice effective
contraception during the study and be willing and able to continue contraception for
3 months after their last dose of study treatment.

Key Exclusion Criteria:

- History of or positive test result at screening for human immunodeficiency virus, or
for hepatitis C virus antibody, or current Hepatitis B infection.

- Clinically significant diseases or conditions as determined by the investigator.

- Major surgery within 30 days prior to the Screening Visit or that is scheduled to
occur during the study.

- Previous participation in a study with neurotrophic factors (e.g., nerve growth
factor).

- Participation in a study with another investigational drug or approved therapy for
investigational use within 3 months prior to Day 1.

- Other unspecified reasons that, in the opinion of the Investigator or Biogen Idec
Inc. (Biogen Idec), make the subject unsuitable for enrollment

NOTE: Other protocol-defined inclusion/exclusion criteria may apply