Benzinga | May 12, 2021 11:03AM EDT

Vertex, CRISPR Therapeutics To Present New Clinical Data On Investigational CRISPR/Cas9 Gene-Editing Therapy CTX001 For Severe Hemoglobinopathies At Annual European Hematology Association Virtual Congress

Vertex Pharmaceuticals Incorporated (NASDAQ:VRTX) and CRISPR Therapeutics (NASDAQ:CRSP) today announced two abstracts detailing updated data from the ongoing CTX001 clinical trials have been accepted for presentation during the European Hematology Association (EHA) 2021 Virtual Congress.



Abstract #EP736 entitled "CTX001 for Sickle Cell Disease: Safety and Efficacy Results from the Ongoing CLIMB SCD-121 Study of Autologous Crispr-Cas9-Modified CD34+ Hematopoietic Stem and Progenitor Cells," will be made available on the virtual platform as an e-poster Friday, June 11 at 9:00 CEST. The abstract posted online today includes data on patients with severe sickle cell disease with more than 3 months of follow-up, as of the interim data cut on January 28, 2021. Data will be updated and information on additional patients will be included for the congress.

Abstract #EP733 entitled "CTX001 for Transfusion-Dependent ?-Thalassemia: Safety and Efficacy Results from the Ongoing CLIMB Thal-111 Study of Autologous Crispr-Cas9-Modified CD34+ Hematopoietic Stem and Progenitor Cells," will be made available on the virtual platform as an e-poster Friday, June 11 at 9:00 CEST. The abstract posted online today includes data on patients with transfusion-dependent beta thalassemia (TDT) with more than 3 months of follow-up, including patients with the most severe genotypes, as of the interim data cut on January 21, 2021. Data will be updated and information on additional patients will be included for the congress.

The accepted abstracts are now available online on the EHA website https://library.ehaweb.org/eha/#!*menu=6*browseby=8*sortby=2*media=3*ce_id=2035*label=21989*ot_id=25562*marker=1286.

CTX001 is being investigated in two ongoing clinical trials as a potential one-time curative therapy for patients suffering from TDT and severe SCD.

About CTX001

CTX001 is an investigational, autologous, ex vivo CRISPR/Cas9 gene-edited therapy that is being evaluated for patients suffering from TDT or severe SCD, in which a patient's hematopoietic stem cells are edited to produce high levels of fetal hemoglobin (HbF; hemoglobin F) in red blood cells. HbF is a form of the oxygen-carrying hemoglobin that is naturally present at birth, which then switches to the adult form of hemoglobin. The elevation of HbF by CTX001 has the potential to alleviate transfusion requirements for patients with TDT and reduce painful and debilitating sickle crises for patients with SCD. Earlier results from these ongoing trials were published as a Brief Report in The New England Journal of Medicine in January of 2021.

Based on progress in this program to date, CTX001 has been granted Regenerative Medicine Advanced Therapy (RMAT), Fast Track, Orphan Drug, and Rare Pediatric Disease designations from the U.S. Food and Drug Administration (FDA) for both TDT and SCD. CTX001 has also been granted Orphan Drug Designation from the European Commission, as well as Priority Medicines (PRIME) designation from the European Medicines Agency (EMA), for both TDT and SCD.

Among gene-editing approaches being investigated/evaluated for TDT and SCD, CTX001 is the furthest advanced in clinical development.

About CLIMB-111

The ongoing Phase 1/2 open-label trial, CLIMB-Thal-111, is designed to assess the safety and efficacy of a single dose of CTX001 in patients ages 12 to 35 with TDT. The trial will enroll up to 45 patients and follow patients for approximately two years after infusion. Each patient will be asked to participate in a long-term follow-up trial.

About CLIMB-121

The ongoing Phase 1/2 open-label trial, CLIMB-SCD-121, is designed to assess the safety and efficacy of a single dose of CTX001 in patients ages 12 to 35 with severe SCD. The trial will enroll up to 45 patients and follow patients for approximately two years after infusion. Each patient will be asked to participate in a long-term follow-up trial.

About CLIMB-131

This is a long-term, open-label trial to evaluate the safety and efficacy of CTX001 in patients who received CTX001 in CLIMB-111 or CLIMB-121. The trial is designed to follow participants for up to 15 years after CTX001 infusion.