Spatial and temporal emergence of high proliferative potential hematopoietic precursors during murine embryogenesis
AUTOR(ES)
Palis, J.
FONTE
The National Academy of Sciences
RESUMO
During mouse embryogenesis, two waves of hematopoietic progenitors originate in the yolk sac. The first wave consists of primitive erythroid progenitors that arise at embryonic day 7.0 (E7.0), whereas the second wave consists of definitive erythroid progenitors that arise at E8.25. To determine whether these unilineage hematopoietic progenitors arise from multipotential precursors, we investigated the kinetics of high proliferative potential colony-forming cells (HPP-CFC), multipotent precursors that give rise to macroscopic colonies when cultured in vitro. No HPP-CFC were found at presomite stages (E6.5–E7.5). Rather, HPP-CFC were detected first at early somite stages (E8.25), exclusively in the yolk sac. HPP-CFC were found subsequently in the bloodstream at higher levels than the remainder of the embryo proper. However, the yolk sac remains the predominant site of HPP-CFC expansion (>100-fold) until the liver begins to serve as the major hematopoietic organ at E11.5. On secondary replating, embryonic HPP-CFC give rise to definitive erythroid and macrophage (but not primitive erythroid) progenitors. Our findings support the hypothesis that definitive but not primitive hematopoietic progenitors originate from yolk sac-derived HPP-CFC during late gastrulation.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=31868Documentos Relacionados
- Proliferative capacity of murine hematopoietic stem cells.
- Spatial and temporal pattern of expression of the cellular retinoic acid-binding protein and the cellular retinol-binding protein during mouse embryogenesis.
- Spatial and temporal pattern of expressiion of the cellular retinoic acid-binding protein and the cellular retinol-binding protein during mouse embryogenesis
- Hematopoietic Stem Cells with High Proliferative Potential: ASSAY OF THEIR CONCENTRATION IN MARROW BY THE FREQUENCY AND DURATION OF CURE OF W/Wv MICE
- Spatial distribution of two maternal messengers in Paracentrotus lividus during oogenesis and embryogenesis.