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Updated: Jun 8, 2025
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Isolation Method for Long-Term and Short-Term Hematopoietic Stem Cells
Published on: May 19, 2023
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Sex-dependent differences in hematopoietic stem cell aging and leukemogenic potential.
Chunxiao Zhang1,2, Taisen Hao1,3, Alessia Bortoluzzi1
1Department of Cancer Biology and Molecular Medicine, Beckman Research Institute, City of Hope, Duarte, CA, 91010, USA.
Oncogene
|November 2, 2024
Summary
Aging male mice show increased susceptibility to myeloid disorders and leukemia compared to females, due to sex-specific hematopoietic stem cell (HSC) aging. This research highlights sex differences in HSC aging and their impact on blood cancers.
Area of Science:
- Hematology
- Immunology
- Aging Research
Background:
- Sex influences biological processes, yet its role in hematopoietic stem cell (HSC) aging and blood disorders remains unclear.
- Young animal models often fail to capture age-related disease complexities relevant to humans.
Purpose of the Study:
- To investigate sex-specific differences in HSC aging and their contribution to age-related hematological disorders and leukemia.
- To explore the impact of sex on HSC aging characteristics and susceptibility to cancer transformation.
Main Methods:
- Utilized aged and long-lived BALB/c mouse models to study sex-dependent disparities in hematopoiesis and leukemogenesis.
- Analyzed HSC aging at population, single-cell, and molecular levels.
- Investigated the role of Sirt1 in modulating chronic myeloid leukemia (CML) development in aging male and female mice.
Main Results:
- Aging mice exhibited sex-dependent myeloid skewing, anemia, and leukemia, mirroring human aging patterns.
- HSC populations expanded more in aging males than females, which showed expansion of committed progenitors.
- Aging male HSCs were more prone to BCR-ABL1 transformation, leading to faster CML development than in females.
- Loss of Sirt1 inhibited CML development in aging males but not females.
Conclusions:
- Sex-differentiated HSC aging significantly impacts hematopoiesis, leukemogenesis, and gene function.
- Findings offer crucial insights into age-dependent blood disorders and suggest sex-targeted therapeutic strategies for blood cancers.
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