Cited by 424Hematopoietic Stem Cell TransplantationBlood disorders and treatmentsMesenchymal stem cell research

Rb Regulates Interactions between Hematopoietic Stem Cells and Their Bone Marrow Microenvironment

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Walkley, Carl R., Shea, Jeremy M., Sims, Natalie A., Purton, Louise E., Orkin, Stuart H.·2007·Cell

Abstract

Hematopoiesis is maintained by stem cells (HSCs) that undergo fate decisions by integrating intrinsic and extrinsic signals, with the latter derived from the bone marrow (BM) microenvironment. Cell-cycle regulation can modulate stem cell fate, but it is unknown whether this represents an intrinsic or extrinsic effector of fate decisions. We have investigated the role of the retinoblastoma protein (RB), a central regulator of the cell cycle, in hematopoiesis. Widespread inactivation of RB in the murine hematopoietic system resulted in profound myeloproliferation. HSCs were lost from the BM due to mobilization to extramedullary sites and differentiation. This phenotype was not intrinsic to HSCs, but, rather, was the consequence of an RB-dependent interaction between myeloid-derived cells and the microenvironment. These findings demonstrate that myeloproliferation may result from perturbed interactions between hematopoietic cells and the niche. Therefore, RB extrinsically regulates HSCs by maintaining the capacity of the BM to support normal hematopoiesis and HSCs.

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Crossref · 10.1016/j.cell.2007.03.055

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  1. Chien, W.M., Rabin, S., Macias, E., Miliani de Marval, P.L., Garrison, K., Orthel, J., Rodriguez-Puebla, M., and Fero, M.L. (2006). Genetic mosaics reveal both cell-autonomous and cell-nonautonomous func- tion of murine p27Kip1. Proc. Natl. Acad. Sci. USA 103, 4122-4127.

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Authors
Walkley, C. R., Shea, J. M., Sims, N. A., Purton, L. E., & Orkin, S. H.
Affiliations
  • Boston Children's Hospital (US)
  • The University of Melbourne (AU)
  • Harvard University (US)
Corresponding author
Orkin, Stuart H.
Venue
Cell
Publisher
Elsevier BV
Published
2007-06
Volume
129
Issue
6
Pages
1081-1095
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2100063372
Cited by
424
References
81
Citations by year
2026: 4 · 2025: 7 · 2024: 3 · 2023: 11 · 2022: 8 · 2021: 15 · 2020: 18 · 2019: 19 · 2018: 25 · 2017: 32 · 2016: 20 · 2015: 29 · 2014: 26 · 2013: 25 · 2012: 36
FWCI
23.11
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Howard Hughes Medical Institute
  • Dana-Farber Cancer Institute
  • National Heart, Lung, and Blood Institute (R01HL032259)
Topics
  • Health Sciences › Medicine › Hematology › Hematopoietic Stem Cell Transplantation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Blood disorders and treatments
  • Health Sciences › Medicine › Genetics › Mesenchymal stem cell research
Keywords
retinoblastoma protein, hematopoietic stem cells, bone marrow microenvironment, hematopoiesis, myeloproliferation, cell cycle regulation, myeloid-derived cells, stem cell fate, extrinsic regulation, stem cell mobilization
MeSH terms
Animals, Bone Marrow, Bone Marrow Cells, Cell Cycle, Cell Differentiation, Gene Expression Regulation, Hematopoietic Stem Cells, Models, Biological, Myeloproliferative Disorders, Phenotype, Stem Cells, Time Factors, Retinoblastoma Protein, Gene Deletion, Mice

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