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Identification and Isolation of Oligopotent and Lineage-committed Myeloid Progenitors from Mouse Bone Marrow
Published on: July 29, 2018
A close developmental relationship between the lymphoid and myeloid lineages
1Laboratory for Lymphocyte Development, RIKEN Research Center for Allergy and Immunology, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan. kawamoto@rcai.riken.jp
Trends in Immunology
|March 7, 2006
Summary
The traditional hematopoietic stem cell model is challenged. Evidence suggests a myeloid-based model, not a simple dichotomy, explains both fetal and adult blood cell development.
Area of Science:
- Hematopoiesis research
- Cell differentiation pathways
- Immunology
Background:
- The classic hematopoietic stem cell model proposes distinct myelo-erythroid and lymphoid progenitors.
- Previous fetal mouse studies revealed myeloid potential in lymphoid lineages, questioning this dichotomy.
- Common lymphoid progenitors (CLPs) have been observed in adult bone marrow models.
Purpose of the Study:
- To re-evaluate the established dichotomy model of hematopoiesis.
- To investigate the validity of the dichotomy model in adult hematopoiesis.
- To propose an alternative myeloid-based model for blood cell development.
Main Methods:
- Review of existing literature on fetal and adult hematopoiesis.
- Analysis of studies investigating myeloid potential in lymphoid lineages.
- Evaluation of evidence supporting or refuting the existence of CLPs in adult bone marrow.
Main Results:
- Fetal hematopoiesis deviates from the simple dichotomy model due to persistent myeloid potential.
- Evidence supporting the presence of CLPs in adult bone marrow exists.
- Recent findings challenge the dichotomy model in adult hematopoiesis.
Conclusions:
- The classic dichotomy model is insufficient to explain hematopoiesis.
- A myeloid-based model is proposed as a more accurate representation of both fetal and adult blood development.
- Hematopoietic stem cell differentiation is more complex than previously thought.
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