Analysis of the spatiotemporal development of hematopoietic stem and progenitor cells in the early human embryo

Jennifer Easterbrook, Stanislav Rybtsov, Sabrina Gordon-Keylock, Andrejs Ivanovs, Samir Taoudi, Richard Anderson, Alexander Medvinsky

Research output: Contribution to journalArticlepeer-review

Abstract

Definitive haematopoietic stem cells (HSCs) first emerge in the aorta-gonad-mesonephros (AGM) region in both mice and human. An ex vivo culture approach has enabled recapitulation and analysis of murine HSC development. Knowledge of early human HSC development is hampered by scarcity of tissue: analysis of both CFU-C and HSC development in the human embryo is limited. Here we characterised the spatial distribution and temporal kinetics of CFU-C development within early human embryonic tissues. We then sought to adapt the murine ex vivo culture system to recapitulate human HSC development. We show robust expansion of CFU-Cs and maintenance, but no significant expansion, of human HSCs in culture. Furthermore, we demonstrate that HSCs emerge predominantly in the middle section of the dorsal aorta in our culture system. We conclude that there are important differences between early mouse and human haematopoiesis, which currently hinder the quest to recapitulate human HSC development ex vivo.
Original languageEnglish
Pages (from-to)1056-1068
Number of pages13
JournalStem Cell Reports
Volume12
Early online date4 Apr 2019
DOIs
Publication statusPublished - 14 May 2019

Keywords

  • fetal liver
  • hematopoietic progenitors
  • hematopoietic stem cells
  • human embryo
  • yolk sac

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