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Solomon M, Song B, Govindarajah V, Good S, Arasu A, Hinton EB, Thakkar K, Bartram J, Filippi MD, Cancelas JA, Salomonis N, Grimes HL, Reynaud D. Slow cycling and durable Flt3+ progenitors contribute to hematopoiesis under native conditions. J Exp Med 2024; 221:e20231035. [PMID: 37910046 PMCID: PMC10620607 DOI: 10.1084/jem.20231035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 09/18/2023] [Accepted: 10/13/2023] [Indexed: 11/03/2023] Open
Abstract
The dynamics of the hematopoietic flux responsible for blood cell production in native conditions remains a matter of debate. Using CITE-seq analyses, we uncovered a distinct progenitor population that displays a cell cycle gene signature similar to the one found in quiescent hematopoietic stem cells. We further determined that the CD62L marker can be used to phenotypically enrich this population in the Flt3+ multipotent progenitor (MPP4) compartment. Functional in vitro and in vivo analyses validated the heterogeneity of the MPP4 compartment and established the quiescent/slow-cycling properties of the CD62L- MPP4 cells. Furthermore, studies under native conditions revealed a novel hierarchical organization of the MPP compartments in which quiescent/slow-cycling MPP4 cells sustain a prolonged hematopoietic activity at steady-state while giving rise to other lineage-biased MPP populations. Altogether, our data characterize a durable and productive quiescent/slow-cycling hematopoietic intermediary within the MPP4 compartment and highlight early paths of progenitor differentiation during unperturbed hematopoiesis.
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Affiliation(s)
- Michael Solomon
- Division of Experimental Hematology and Cancer Biology, Stem Cell Program, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - Baobao Song
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Immunology Graduate Program, University of Cincinnati, Cincinnati, OH, USA
| | - Vinothini Govindarajah
- Division of Experimental Hematology and Cancer Biology, Stem Cell Program, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - Samantha Good
- Division of Experimental Hematology and Cancer Biology, Stem Cell Program, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - Ashok Arasu
- Division of Experimental Hematology and Cancer Biology, Stem Cell Program, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - E. Broderick Hinton
- Division of Experimental Hematology and Cancer Biology, Stem Cell Program, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - Kairavee Thakkar
- Division of Biomedical Informatics, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - James Bartram
- Division of Experimental Hematology and Cancer Biology, Stem Cell Program, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - Marie-Dominique Filippi
- Division of Experimental Hematology and Cancer Biology, Stem Cell Program, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Jose A. Cancelas
- Division of Experimental Hematology and Cancer Biology, Stem Cell Program, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
- Hoxworth Blood Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Nathan Salomonis
- Division of Biomedical Informatics, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - H. Leighton Grimes
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Damien Reynaud
- Division of Experimental Hematology and Cancer Biology, Stem Cell Program, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
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