Open-Label Efficacy and Safety Study of Pozelimab in Patients With CD55-Deficient Protein-Losing Enteropathy (CHAPLE Disease)

Summary

The primary objective of the study is to determine the effect of pozelimab on active CD55-deficient protein-losing enteropathy (PLE; CHAPLE). The secondary objectives of the study are: * To evaluate the safety and tolerability of pozelimab in patients with CD55-deficient PLE disease * To evaluate the effect of pozelimab on CD55-deficient PLE (both patients with active disease at baseline and those with inactive disease on eculizumab, switching to pozelimab) * To determine the effects of pozelimab on albumin and other serum proteins (total protein, immunoglobulins) * To determine the effects of pozelimab on ascites * To determine the effects of pozelimab on stool consistency * To determine the effect of pozelimab on health-related quality of life * To determine the effect of pozelimab on lab abnormalities observed in CD55-deficient PLE such as hypertriglyceridemia, thrombocytosis, and hypovitaminosis B12 * To describe the effects of pozelimab on the sparing of concomitant medications and reduction in hospitalization days * To determine the effects of pozelimab on growth * To characterize the concentration of pozelimab in patients with CD55-deficient PLE * To assess the incidence of treatment-emergent ADA for pozelimab in patients with CD55-deficient PLE disease

Timeline

Start

2020-01-27

Primary completion

2021-11-09

Completion

2024-05-02

Publications

• Litcher-Kelly L, Ozen A, Ollis S, Feldman HB, Yaworsky A, Medrano P, Chongsrisawat V, Perlee L, Walker M, Pradeep S, Turner-Bowker DM, Kurolap A, Adiv OE, Lenardo MJ, Harari OA, Jalbert JJ. The patient experience of CHAPLE disease: results from interviews conducted as part of a clinical trial for an ultra-rare condition. Orphanet J Rare Dis. 2025 Feb 11;20(1):68. doi: 10.1186/s13023-024-03436-y.
• Litcher-Kelly L, Ozen A, Ollis S, Feldman HB, Yaworsky A, Medrano P, Chongsrisawa V, Brackin T, Perlee L, Walker M, Pradeep S, Lenardo MJ, Harari OA, Jalbert JJ. Pozelimab for CHAPLE disease: results from in-trial interviews and clinical outcome assessments. Orphanet J Rare Dis. 2024 Aug 8;19(1):290. doi: 10.1186/s13023-024-03277-9.
• Ozen A, Chongsrisawat V, Sefer AP, Kolukisa B, Jalbert JJ, Meagher KA, Brackin T, Feldman HB, Baris S, Karakoc-Aydiner E, Ergelen R, Fuss IJ, Moorman H, Suratannon N, Suphapeetiporn K, Perlee L, Harari OA, Yancopoulos GD, Lenardo MJ; Pozelimab CHAPLE Working Group. Evaluating the efficacy and safety of pozelimab in patients with CD55 deficiency with hyperactivation of complement, angiopathic thrombosis, and protein-losing enteropathy disease: an open-label phase 2 and 3 study. Lancet. 2024 Feb 17;403(10427):645-656. doi: 10.1016/S0140-6736(23)02358-9. Epub 2024 Jan 23.

Drugs

Indications