Clinical Trial

Disease: Sickle Cell Disease, SCD, (NCT05329649)

Disease info:

Sickle cell disease is a group of disorders that affects haemoglobin, the molecule in red blood cells that delivers oxygen to cells throughout the body. People with this disorder have atypical haemoglobin molecules called haemoglobin S, which can distort red blood cells into a sickle or crescent shape.

The production of haemoglobin A, which is the principle type of haemoglobin in humans, is governed by 3 genes: HBA1, HBA2, and HBB. Each haemoglobin A molecule consists of two alpha and two beta chains, and mutations in either of the HBA or the HBB genes may result in abnormal haemoglobin molecules with reduced or diminshed function. Sickle cell diseaase arises from a single point mutation in the 6th codon of the beta-globin gene (HBB), which results in a valine instead of a glutamic acid in the haemoglobin beta-chain.

Abnormal haemoglobin ultimately leads to anaemia as well as other symptoms, depending on the exact mutations present. Diseases caused by defective haemoglobin fall into a larger category of diseases known as the "haemoglobinopathies" which also include the thalassemias, a related group of diseases that are characterised by reduced or deficient rather than abnormal haemoglobin. 

Frequency:
Sickle cell disease is the most common inherited blood disorder in the United States, affecting 70,000 to 80,000 Americans. The disease is estimated to occur in 1 in 500 African Americans and 1 in 1,000 to 1,400 Hispanic Americans.
Official title:
A Phase 3 Study to Evaluate the Safety and Efficacy of a Single Dose of CTX001 in Pediatric Subjects With Severe Sickle Cell Disease
Who:

Vertex Pharmaceuticals, medicalinfo@vrtx.com

Locations:

Not yet disclosed.

Study start:
Apr. 22, 2022
Enrollment:
12
Gene editing method:
CRISPR-Cas9
Type of edit:
Gene disruption
Gene:
BAF Chromatin Remodeling Complex Subunit 11A (BCL11A)
Delivery method:
Electroporation - Ex-vivo
Indicator
IND Enabling Pre-clinical
Phase I Safety
Phase II Safety and Dosing
Phase III Safety and Efficacy

Status: Active recruiting

Description

This is a single-dose, open-label study in paediatric participants with severe SCD and hydroxyurea (HU) failure or intolerance. The study will evaluate the safety and efficacy of autologous CRISPR-Cas9-modified CD34+ human haematopoietic stem and progenitor cells (hHSPCs) (CTX001).

Last updated: Jul. 20, 2022
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