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Clinical Trial Summary

Cold agglutinin disease (CAD) is defined as a chronic autoimmune hemolytic anemia (AIHA) with a monospecific direct antiglobulin test (DAT) strongly positive for C3d and the presence of cold agglutinins (CA; titer ≥ 64 at 4°C). Patients may have a B-cell clonal lymphoproliferative disorder (LPD) detectable in blood or marrow but no clinical or radiological evidence of malignancy. CAD can lead to AIHA, peripheral ischemic symptoms (cold-induced peripheral symptoms such as acrocyanosis etc.), or both. The CAs are typically monoclonal IgM antibodies produced by the clonal B-cells, usually IgM kappa with specificity for the I antigen on erythrocytes. There is no curative treatment. Current treatment options include rituximab monotherapy, however this has only a limited and short-lasting effect. Rituximab in combination with chemotherapy induces deeper and more durable responses, however since CAD patients typically do not have an overt malignancy this comes with concerns about short- and long-term toxicity. Novel complement inhibitors may be effective for the hemolysis but are not expected to be effective against cold induced peripheral symptoms while this is directly IgM mediated. Bruton Tyrosine Kinase inhibitors (BTKis) are effective in many B-cell lymphoproliferative disorders including the IgM producing clone of Waldenström macroglobulinemia (WM) and were very effective on both AIHA and peripheral ischemic symptoms in patients with CAD based on retrospective data.


Clinical Trial Description

n/a


Study Design


Related Conditions & MeSH terms


NCT number NCT06067048
Study type Interventional
Source Stichting Hemato-Oncologie voor Volwassenen Nederland
Contact Josephine Vos, MD
Phone 020 566 9111
Email j.m.i.vos@amsterdamumc.nl
Status Not yet recruiting
Phase Phase 2
Start date February 1, 2024
Completion date November 1, 2028

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