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Study identifier: NCT05338190 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

Efficacy and Safety of Subcutaneous Belimumab or Placebo in Addition of Rituximab in Persistent or Chronic Immune Thrombocytopenia

Condition: Primary Immune Thrombocytopenia (ITP)  ·  Sponsor: Assistance Publique - Hôpitaux de Paris

PhasePhase 3
Planned participants132
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

Primary immune thrombocytopenia (ITP) is an autoimmune disease mainly mediated by autoreactive B cells and the presence of pathogenic anti-platelet auto-antibodies that enhance platelet destruction and impair platelet production. There are approximately 4,000 newly diagnosed ITP cases each year in France. For patients with a platelet count of less than 30x109/L and/or bleeding symptoms, corticosteroids alone or in combination with intravenous immunoglobulin (IVIg) is the standard first-line treatment. However, approximately two-thirds of adult patients responding to this first-line treatment relapse within days or weeks after corticosteroids withdrawal and overall, the course of the disease is chronic in about 70% of the cases. The anti-CD20 monoclonal antibody rituximab is commonly used off-label as a second-line therapy in many European countries including France for adults with persistent (i.e., disease duration of more than 3 months) or chronic (disease duration of more than 12 months) ITP. Rituximab leads to an overall response rate of only 40 % at 1 year but 29.5% of lasting (5 years and more) response The investigators have shown that the absence of response to rituximab in ITP could be explained by the settlement and expansion of long-lived autoreactive plasma cells in the spleen made possible by the high amount of BAFF. Belimumab is a fully humanized anti-BAFF/Blys monoclonal Ab licensed for SLE. Based on the preliminary results of a phase 2 open prospective pilot st…

This description comes directly from the study's public registry record.

Talk to the study team

Matthieu MAHEVAS, Professor of medicine  ·  0 1 49 81 20 76  ·  matthieu.mahevas@aphp.fr

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Locations (1)

Henri Mondor HospitalCréteil, FranceRecruiting

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Source record: clinicaltrials.gov/study/NCT05338190