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A Double-masked, Placebo-controlled Study With Open-label Period to Evaluate the Efficacy and Safety of MEDI-551 in Adult Subjects With Neuromyelitis Optica and Neuromyelitis Optica Spectrum Disorders

A Double-masked, Placebo-controlled Study With Open-label Period to Evaluate the Efficacy and Safety of MEDI-551 in Adult Subjects With Neuromyelitis Optica and Neuromyelitis Optica Spectrum Disorders

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2080223977
Enrollment
Unknown
Registered
2018-07-13
Start date
2018-07-13
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Neuromyelitis Optica and Neuromyelitis Optica Spectrum Disorders

Interventions

Sponsors

MedImmune LLC
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: - Diagnosis of NMO/NMOSD - Confirmation of NMO/NMOSD status: 1. AQP4-IgG sero-positive NMO/NMOSD with at least one attack requiring rescue therapy in the last year or two attacks requiring rescue therapy in the last 2 years 2. AQP4-IgG sero-negative NMO with at least one attack requiring rescue therapy in the last year or two attacks requiring rescue therapy in the last 2 years - Able and willing to give written informed consent and comply with the requirements of the study protocol - EDSS <= 7.5 (8 in special circumstances) - Men and women of reproductive potential must agree to use a highly effective method of birth control from screening to 6 months after final dose of the investigational product

Exclusion criteria

Exclusion criteria: - Lactating and pregnant females - Treatment with any investigational agent within 4 weeks of screening - Known history of a severe allergy or reaction to any component of the investigational product formulation or history of anaphylaxis following any biologic therapy. - Known active severe bacterial, viral, or other infection or any major episode of infection requiring hospitalization. - History of alcohol, drug, or chemical abuse, or a recent history of such abuse 3 months prior to randomization - Any concomitant disease other than NMO/NMOSD that required treatment with oral or intravenous steroids at doses over 20 mg a day for over 21 days

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026