Cited by 471Platelet Disorders and TreatmentsHematopoietic Stem Cell TransplantationMesenchymal stem cell research

Inflammation-Induced Emergency Megakaryopoiesis Driven by Hematopoietic Stem Cell-like Megakaryocyte Progenitors

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Haas, Simon, Hansson, Jenny, Klimmeck, Daniel, Loeffler, Dirk, Velten, Lars, Uckelmann, Hannah, Wurzer, Stephan, Prendergast, Áine M. +12 more·2015·Cell Stem Cell

Abstract

Infections are associated with extensive platelet consumption, representing a high risk for health. However, the mechanism coordinating the rapid regeneration of the platelet pool during such stress conditions remains unclear. Here, we report that the phenotypic hematopoietic stem cell (HSC) compartment contains stem-like megakaryocyte-committed progenitors (SL-MkPs), a cell population that shares many features with multipotent HSCs and serves as a lineage-restricted emergency pool for inflammatory insults. During homeostasis, SL-MkPs are maintained in a primed but quiescent state, thus contributing little to steady-state megakaryopoiesis. Even though lineage-specific megakaryocyte transcripts are expressed, protein synthesis is suppressed. In response to acute inflammation, SL-MkPs become activated, resulting in megakaryocyte protein production from pre-existing transcripts and a maturation of SL-MkPs and other megakaryocyte progenitors. This results in an efficient replenishment of platelets that are lost during inflammatory insult. Thus, our study reveals an emergency machinery that counteracts life-threatening platelet depletions during acute inflammation.

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Authors
Haas, S., Hansson, J., Klimmeck, D., Loeffler, D., Velten, L., Uckelmann, H., Wurzer, S., Prendergast, Á. M., Schnell, A., Hexel, K., Santarella-Mellwig, R., Blaszkiewicz, S., Kuck, A., Geiger, H., Milsom, M. D., Steinmetz, L. M., Schroeder, T., Trumpp, A., Krijgsveld, J., & Essers, M. A. G.
Affiliations
  • German Cancer Research Center (DE)
  • European Molecular Biology Laboratory (DE)
  • ETH Zurich (CH)
  • Cincinnati Children's Hospital Medical Center (US)
  • Stanford Medicine (US)
Corresponding author
Essers, Marieke A.G.
Venue
Cell Stem Cell
Publisher
Elsevier BV
Published
2015-10
Volume
17
Issue
4
Pages
422-434
ISSN
  • 1875-9777 (ISSN-L)
  • 1934-5909
OpenAlex
W1787222452
Cited by
471
References
0
Citations by year
2026: 27 · 2025: 43 · 2024: 39 · 2023: 42 · 2022: 58 · 2021: 59 · 2020: 55 · 2019: 46 · 2018: 43 · 2017: 29 · 2016: 27 · 2015: 1
FWCI
26.11
Type
journal article
Language
en
Open access
Locations
  • Cell stem cell (publishedVersion)
  • PubMed (publishedVersion)
  • MDC Repository (Max-Delbrueck-Center for Molecular Medicine) (submittedVersion)
  • Lund University Publications (Lund University) (submittedVersion)
Funders
Deutsches Krebsforschungszentrum
Topics
  • Health Sciences › Medicine › Hematology › Platelet Disorders and Treatments
  • Health Sciences › Medicine › Hematology › Hematopoietic Stem Cell Transplantation
  • Health Sciences › Medicine › Genetics › Mesenchymal stem cell research
Keywords
megakaryopoiesis, acute inflammation, megakaryocyte progenitors, platelet depletion, platelet consumption, protein synthesis inhibition, megakaryocyte maturation
MeSH terms
Animals, Blood Platelets, Hematopoietic Stem Cells, Inflammation, Cell Lineage, Thrombopoiesis, Cell Proliferation, Mice, Megakaryocyte Progenitor Cells

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