Chemically-defined generation of human hemogenic endothelium and definitive hematopoietic progenitor cells

Biomaterials. 2022 Jun:285:121569. doi: 10.1016/j.biomaterials.2022.121569. Epub 2022 May 6.

Abstract

Human hematopoietic stem cells (HSCs), which arise from aorta-gonad-mesonephros (AGM), are widely used to treat blood diseases and cancers. However, a technique for their robust generation in vitro is still missing. Here we show temporal manipulation of Wnt signaling is sufficient and essential to induce AGM-like hematopoiesis from human pluripotent stem cells. TGFβ inhibition at the stage of aorta-like SOX17+CD235a- hemogenic endothelium yielded AGM-like hematopoietic progenitors, which closely resembled primary cord blood HSCs at the transcriptional level and contained diverse lineage-primed progenitor populations via single cell RNA-sequencing analysis. Notably, the resulting definitive cells presented lymphoid and myeloid potential in vitro; and could home to a definitive hematopoietic site in zebrafish and rescue bloodless zebrafish after transplantation. Engraftment and multilineage repopulating activities were also observed in mouse recipients. Together, our work provided a chemically-defined and feeder-free culture platform for scalable generation of AGM-like hematopoietic progenitor cells, leading to enhanced production of functional blood and immune cells for various therapeutic applications.

Keywords: Chemically defined; Hematopoietic stem and progenitor cells; RNA sequencing; Stem cell differentiation; Transplantation; Wnt signaling.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cell Differentiation / physiology
  • Hemangioblasts*
  • Hematopoiesis / physiology
  • Hematopoietic Stem Cells
  • Humans
  • Mesonephros
  • Mice
  • Zebrafish