A Safety and Efficacy Study Evaluating CTX001 in Participants With Transfusion-Dependent β-Thalassemia

Summary

This is a single-arm, open-label, multi-site, single-dose Phase 1/2/3 study in participans with transfusion-dependent β-thalassemia (TDT). The study will evaluate the safety and efficacy of autologous CRISPR-Cas9 Modified CD34+ Human Hematopoietic Stem and Progenitor Cells (hHSPCs) using CTX001.

Timeline

Start

2018-09-14

Primary completion

2025-11-13

Completion

2025-11-13

Outcome

Met primary endpoint

paper transfusion independence occurred in 32 (91%; 95% confidence interval, 77 to 98; P<0.001 against the null hypothesis of a 50% response). PMID 38657265 ↗

Publications

• Sheth S, Corbacioglu S, de la Fuente J, Algeri M, Rupprecht J, Kuo KHM, Shah AJ, Lang P, Merkeley H, Carpenter B, Mapara MY, Liem RI, Grupp S, Chopra Y, Li AM, Kwiatkowski JL, Kirby-Allen M, Cappellini MD, Kattamis A, Zairis S, Liu T, Hobbs W, Frangoul H, Locatelli F, Meisel R; CLIMB THAL-111 and CLIMB-131 Study Groups. Correction of Ineffective Erythropoiesis and Normalization of Iron Homeostasis After Exagamglogene Autotemcel in Transfusion-Dependent beta-Thalassemia. Am J Hematol. 2026 Aug;101(8):1969-1979. doi: 10.1002/ajh.70382. Epub 2026 Jun 7.
• Fuente J, Frangoul H, Lang P, Wall D, Meisel R, Corbacioglu S, Li AM, Shah AJ, Carpenter B, Kwiatkowski JL, Mapara MY, Liem RI, Rupprecht J, Kuo KHM, Merkeley H, Algeri M, Smith W, Kohli P, Li N, Rubin J, Zhang S, Hobbs W, Locatelli F. Improvements in health-related quality of life in patients with transfusion-dependent beta-thalassemia after exagamglogene autotemcel. Blood Adv. 2025 Dec 23;9(24):6502-6510. doi: 10.1182/bloodadvances.2025016702.
• Locatelli F, Lang P, Wall D, Meisel R, Corbacioglu S, Li AM, de la Fuente J, Shah AJ, Carpenter B, Kwiatkowski JL, Mapara M, Liem RI, Cappellini MD, Algeri M, Kattamis A, Sheth S, Grupp S, Handgretinger R, Kohli P, Shi D, Ross L, Bobruff Y, Simard C, Zhang L, Morrow PK, Hobbs WE, Frangoul H; CLIMB THAL-111 Study Group. Exagamglogene Autotemcel for Transfusion-Dependent beta-Thalassemia. N Engl J Med. 2024 May 9;390(18):1663-1676. doi: 10.1056/NEJMoa2309673. Epub 2024 Apr 24.
• Brusson M, Miccio A. Genome editing approaches to beta-hemoglobinopathies. Prog Mol Biol Transl Sci. 2021;182:153-183. doi: 10.1016/bs.pmbts.2021.01.025. Epub 2021 Mar 1.
• Frangoul H, Altshuler D, Cappellini MD, Chen YS, Domm J, Eustace BK, Foell J, de la Fuente J, Grupp S, Handgretinger R, Ho TW, Kattamis A, Kernytsky A, Lekstrom-Himes J, Li AM, Locatelli F, Mapara MY, de Montalembert M, Rondelli D, Sharma A, Sheth S, Soni S, Steinberg MH, Wall D, Yen A, Corbacioglu S. CRISPR-Cas9 Gene Editing for Sickle Cell Disease and beta-Thalassemia. N Engl J Med. 2021 Jan 21;384(3):252-260. doi: 10.1056/NEJMoa2031054. Epub 2020 Dec 5.

Drugs

Indications