한빛사논문
Yoon-A Kang # 1,2, Hyojung Paik # 3, Si Yi Zhang 2, Jonathan J Chen 4, Oakley C Olson 1, Carl A Mitchell 1, Amelie Collins 1, James W Swann 1, Matthew R Warr 2, Rong Fan 4, Emmanuelle Passegué 1,2
1Columbia Stem Cell Initiative, Department of Genetics and Development, Columbia University , New York, NY, USA.
2Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, Department of Medicine, Hem/Onc Division, University of California, San Francisco , San Francisco, CA, USA.
3Center for Applied Scientific Computing, Korea Institute of Science and Technology Information, and University of Science and Technology , Daejeon, South Korea.
4Department of Biomedical Engineering, Yale University , New Haven, CT, USA.
#Contributed equally.
*Y-A. Kang and H. Paik contributed equally to this paper.
Correspondence to Emmanuelle Passegué, Yoon-A Kang
Y-A. Kang’s current affiliation is Division of Hematology, Department of Medicine, Washington University in St. Louis, St. Louis, MO, USA.
Abstract
Hematopoietic stem cells (HSC) and downstream lineage-biased multipotent progenitors (MPP) tailor blood production and control myelopoiesis on demand. Recent lineage tracing analyses revealed MPPs to be major functional contributors to steady-state hematopoiesis. However, we still lack a precise resolution of myeloid differentiation trajectories and cellular heterogeneity in the MPP compartment. Here, we found that myeloid-biased MPP3 are functionally and molecularly heterogeneous, with a distinct subset of myeloid-primed secretory cells with high endoplasmic reticulum (ER) volume and FcγR expression. We show that FcγR+/ERhigh MPP3 are a transitional population serving as a reservoir for rapid production of granulocyte/macrophage progenitors (GMP), which directly amplify myelopoiesis through inflammation-triggered secretion of cytokines in the local bone marrow (BM) microenvironment. Our results identify a novel regulatory function for a secretory MPP3 subset that controls myeloid differentiation through lineage-priming and cytokine production and acts as a self-reinforcing amplification compartment in inflammatory stress and disease conditions.
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