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Updated: Oct 26, 2025
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Phenotypic Analysis and Isolation of Murine Hematopoietic Stem Cells and Lineage-committed Progenitors
Published on: July 8, 2012
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A STAT5B-CD9 axis determines self-renewal in hematopoietic and leukemic stem cells
Sebastian Kollmann1, Reinhard Grausenburger1, Thorsten Klampfl1
1Institute of Pharmacology and Toxicology, University of Veterinary Medicine Vienna, Vienna, Austria.
Blood
|July 28, 2021
Summary
Signal transducer and activator of transcription 5B (STAT5B) uniquely drives self-renewal in hematopoietic and leukemic stem cells (HSCs/LSCs). Targeting CD9, a marker of STAT5B activity, may eliminate LSCs in leukemia treatment.
Area of Science:
- Hematology
- Molecular Biology
- Cancer Research
Background:
- Signal transducer and activator of transcription 5A (STAT5A) and STAT5B are crucial for hematopoiesis and leukemia.
- These transcription factors are often considered to have redundant functions.
Purpose of the Study:
- To investigate the distinct roles of STAT5A and STAT5B in normal and malignant hematopoiesis.
- To identify unique functions of STAT5B in hematopoietic and leukemic stem cells (HSCs/LSCs).
Main Methods:
- Analysis of STAT5A and STAT5B activation in HSCs and LSCs.
- Gene expression profiling to identify STAT5B-regulated genes.
- Evaluation of CD9 as a prognostic marker and therapeutic target.
Main Results:
- STAT5B is specifically activated in HSCs and LSCs.
- STAT5B induces genes associated with quiescence and self-renewal, including CD9.
- CD9 levels correlate with prognosis in STAT5-driven leukemia.
Conclusions:
- STAT5A and STAT5B have distinct, non-redundant functions in hematopoiesis and leukemia.
- STAT5B plays a unique role in driving HSC/LSC self-renewal.
- CD9 is a potential therapeutic target for eliminating LSCs in leukemia.
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