1. Mouse multipotent progenitor 5 cells are located at the interphase between hematopoietic stem and progenitor cells.
- Author
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Sommerkamp P, Romero-Mulero MC, Narr A, Ladel L, Hustin L, Schönberger K, Renders S, Altamura S, Zeisberger P, Jäcklein K, Klimmeck D, Rodriguez-Fraticelli A, Camargo FD, Perié L, Trumpp A, and Cabezas-Wallscheid N
- Subjects
- Animals, Mice, Antigens, CD metabolism, Hematopoietic Stem Cells metabolism, Multipotent Stem Cells metabolism
- Abstract
Hematopoietic stem cells (HSCs) and distinct multipotent progenitor (MPP) populations (MPP1-4) contained within the Lin-Sca-1+c-Kit+ (LSK) compartment have previously been identified using diverse surface-marker panels. Here, we phenotypically define and functionally characterize MPP5 (LSK CD34+CD135-CD48-CD150-). Upon transplantation, MPP5 supports initial emergency myelopoiesis followed by stable contribution to the lymphoid lineage. MPP5, capable of generating MPP1-4 but not HSCs, represents a dynamic and versatile component of the MPP network. To characterize all hematopoietic stem and progenitor cells, we performed RNA-sequencing (RNA-seq) analysis to identify specific transcriptomic landscapes of HSCs and MPP1-5. This was complemented by single-cell RNA-seq analysis of LSK cells to establish the differentiation trajectories from HSCs to MPP1-5. In agreement with functional reconstitution activity, MPP5 is located immediately downstream of HSCs but upstream of the more committed MPP2-4. This study provides a comprehensive analysis of the LSK compartment, focusing on the functional and molecular characteristics of the newly defined MPP5 subset., (© 2021 by The American Society of Hematology.)
- Published
- 2021
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