Premature senescence impairs hematopoietic stem cell function during sickle cell disease in mice and humans.
Senolytic drugs restore blood-forming stem cell function in sickle cell disease, offering a path to improve outcomes for gene therapy.
Bone marrow HSPCs from sickle cell disease mice and patients exhibit molecular signatures of premature senescence including oxidative stress, DNA damage, prolonged cell-cycle kinetics, and transcriptomic dysregulation of senescence programs, resulting in markedly reduced functional repopulating capacity in transplantation studies. Treatment with senolytics (navitoclax or dasatinib+quercetin) reversed HSPC functional deficits in both mouse and human systems, suggesting a clinically testable strategy to improve HSPC quality for gene therapy and curative transplantation in SCD.
What the study was
- Study design
- translational experimental
- Population
- sickle cell disease patients (bone marrow) and SCD mouse models
- Category
- Treatment Innovation
- Maturity
- Exploratory
- Journal
- Science Translational Medicine
Why it surfaced
Establishes premature HSC senescence as a therapeutically targetable mechanism underlying poor gene therapy outcomes in sickle cell disease; both navitoclax and dasatinib+quercetin are clinically available agents with immediate translational potential to improve outcomes in ongoing curative SCD gene therapy trials.
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