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Updated: Dec 26, 2025

CRISPR/Cas9 Gene Editing of Hematopoietic Stem and Progenitor Cells for Gene Therapy Applications
Published on: August 9, 2022
When basic science reaches into rational therapeutic design: from historical to novel leads for the treatment of
Charlotte Andrieu-Soler1,2, Eric Soler1,2
1Institut de Génétique Moléculaire de Montpellier, Univ Montpellier, CNRS, Montpellier.
Insights
Reactivating fetal hemoglobin (HbF) by targeting globin gene expression offers a promising therapeutic strategy for inherited blood disorders like beta-thalassemia and sickle cell disease. Understanding the complex regulatory networks controlling the switch from fetal to adult hemoglobin is key to developing effective treatments.
Area of Science:
- Genetics
- Molecular Biology
- Hematology
Background:
- Beta-hemoglobinopathies, including beta-thalassemia (β-Thal) and sickle cell disease (SCD), are common inherited blood disorders.
- These conditions result from defects in adult hemoglobin production, causing anemia and severe complications.
- Reactivating fetal hemoglobin (HbF) by increasing gamma-globin gene expression is a therapeutic strategy to alleviate disease severity.
Purpose of the Study:
- To review recent discoveries in the genetic and molecular regulation of the fetal to adult globin gene switch.
- To discuss novel therapeutic strategies for inducing HbF pharmacologically.
- To highlight breakthroughs in rational drug design for treating β-Thal and SCD.
Main Methods:
- Review of recent scientific literature on globin gene regulation.
- Analysis of molecular and genetic networks controlling the globin switch.
- Discussion of pharmacological approaches for HbF induction.
Main Results:
- Identification of novel regulatory factors involved in globin gene expression.
- Elucidation of complex repression systems maintaining HbF silencing in adults.
- Emergence of new therapeutic leads based on HbF induction.
Conclusions:
- Understanding globin gene regulation provides critical insights into treating β-Thal and SCD.
- Pharmacological induction of HbF represents a significant advancement in managing these inherited blood disorders.
- These findings pave the way for innovative drug design and improved patient outcomes.
Purpose Of Review:
β-hemoglobinopathies, such as β-Thalassemias (β-Thal) and sickle cell disease (SCD) are among the most common inherited genetic disorders in humans worldwide. These disorders are characterized by a quantitative (β-Thal) or qualitative (SCD) defects in adult hemoglobin production, leading to anemia, ineffective erythropoiesis and severe secondary complications. Reactivation of the fetal globin genes (γ-globin), making-up fetal hemoglobin (HbF), which are normally silenced in adults, represents a major strategy to ameliorate anemia and disease severity.
Recent Findings:
Following the identification of the first 'switching factors' for the reactivation of fetal globin gene expression more than 10 years ago, a multitude of novel leads have recently been uncovered.
Summary:
Recent findings provided invaluable functional insights into the genetic and molecular networks controlling globin genes expression, revealing that complex repression systems evolved in erythroid cells to maintain HbF silencing in adults. This review summarizes these unique and exciting discoveries of the regulatory factors controlling the globin switch. New insights and novel leads for therapeutic strategies based on the pharmacological induction of HbF are discussed. This represents a major breakthrough for rational drug design in the treatment of β-Thal and SCD.
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