Embryonic hematopoiesis in mice and humans

Area of Science:

• Developmental Biology
• Hematology
• Stem Cell Research

Background:

• Hematopoiesis, the process of blood cell formation, undergoes significant changes during embryonic development.
• Understanding the origins of hematopoietic stem cells (HSCs) is crucial for regenerative medicine and developmental biology.

Purpose of the Study:

• To review the ontogeny of hematopoiesis in both murine and human models.
• To discuss emerging evidence supporting an intraembryonic origin for hematopoietic stem cells.

Main Methods:

• Literature review of the PubMed database.
• Inclusion of experimental data from the authors' laboratories.

Main Results:

• Major sites of hematopoiesis shift throughout embryonic development in mice and humans.
• Evidence indicates that hematopoietic cells can arise from mesoderm precursors within the embryo, in addition to the yolk sac.

Conclusions:

• The developmental process of hematopoiesis is conserved between mice and humans.
• The mouse model serves as a valuable system for investigating the early stages of hematopoietic stem cell formation.