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Monoclonal antibody
TypeWhole antibody
Clinical data
ATC code
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Namilumab (alternative identifier MT203) is a human monoclonal antibody (class IgG1 kappa) that targets granulocyte macrophage-colony stimulating factor (GM-CSF)/colony stimulating factor 2 (CSF2) and is currently being researched for application in rheumatoid arthritis (RA) and psoriatic arthritis.[1][2][3] Clinical trials investigating the therapeutic utility of Namilumab have include phase I and phase II clinical trials to establish the safety, tolerability and preliminary therapeutic utility of the antibody in plaque psoriasis[4] and rheumatoid arthritis.[5][6]

Namilumab was produced by Micromet Inc and is under development by Takeda Pharmaceuticals International.[3][7]


  1. ^ World Health Organization (2010). "International Nonproprietary Names for Pharmaceutical Substances (INN). Proposed INN: List 104" (PDF). WHO Drug Information. 24 (4).
  2. ^ Huizinga T, Batalov A, Stoilov R, Lloyd E, Wagner T, Saurigny D, Souberbielle B, Esfandiari E (October 2015). "Namilumab, an Anti-Granulocyte Macrophage-Colony Stimulating Factor (GM-CSF) Monoclonal Antibody: Results of the First Study in Patients with Mild-to-Moderate Rheumatoid Arthritis (RA): Abstract Number: 969". Arthritis & Rheumatology. 67.
  3. ^ a b "Namilumab". Adis Insight. Springer Nature Switzerland AG. Retrieved 2017-03-24.
  4. ^ Clinical trial number NCT02129777 for "Efficacy and Safety of Namilumab (MT203) for Plaque Psoriasis" at
  5. ^ "A 24-week Randomized, Open-Label, Parallel-Group, Active-Controlled, Exploratory, Proof-of-Mechanism Imaging Study Investigating the Efficacy of 150 mg of Namilumab Administered Subcutaneously vs Adalimumab in Patients With Moderate to Severe Early Rheumatoid Arthritis Inadequately Responding to Methotrexate". Adis Insight. Springer Nature Switzerland AG. Retrieved 2017-03-24.
  6. ^ Clinical trial number NCT02379091 for "Dose Finding Study of Namilumab in Combination With Methotrexate in Participants With Moderate to Severe Rheumatoid Arthritis (RA)" at
  7. ^ "Namilumab". Takeda clinical trials summary.