Cited by 133Erythropoietin and Anemia TreatmentHematopoietic Stem Cell TransplantationErythrocyte Function and Pathophysiology

Rb intrinsically promotes erythropoiesis by coupling cell cycle exit with mitochondrial biogenesis

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Sankaran, Vijay G., Orkin,, Stuart H., Walkley, Carl R.·2008·Genes & Development

Abstract

Regulation of the cell cycle is intimately linked to erythroid differentiation, yet how these processes are coupled is not well understood. To gain insight into this coordinate regulation, we examined the role that the retinoblastoma protein (Rb), a central regulator of the cell cycle, plays in erythropoiesis. We found that Rb serves a cell-intrinsic role and its absence causes ineffective erythropoiesis, with a differentiation block at the transition from early to late erythroblasts. Unexpectedly, in addition to a failure to properly exit the cell cycle, mitochondrial biogenesis fails to be up-regulated concomitantly, contributing to this differentiation block. The link between erythropoiesis and mitochondrial function was validated by inhibition of mitochondrial biogenesis. Erythropoiesis in the absence of Rb resembles the human myelodysplastic syndromes, where defects in cell cycle regulation and mitochondrial function frequently occur. Our work demonstrates how these seemingly disparate pathways play a role in coordinately regulating cellular differentiation.

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Authors
Sankaran, V. G., Orkin, & Walkley, C. R.
Affiliations
Harvard University (US)
Venue
Genes & Development
Published
2008-02-07
Volume
22
Issue
4
Pages
463-475
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W2567749685
Cited by
133
References
65
Citations by year
2025: 3 · 2024: 6 · 2023: 1 · 2022: 4 · 2021: 6 · 2020: 6 · 2019: 5 · 2018: 5 · 2017: 5 · 2016: 4 · 2015: 15 · 2014: 11 · 2013: 12 · 2012: 7
Type
posted content
Language
en
Open access
Locations
  • Genes & Development (publishedVersion)
  • Blood (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Howard Hughes Medical Institute
  • Leukemia and Lymphoma Society
  • Dana-Farber Cancer Institute
  • National Institutes of Health
  • National Institute of Diabetes and Digestive and Kidney Diseases
Topics
  • Health Sciences › Medicine › Hematology › Erythropoietin and Anemia Treatment
  • Health Sciences › Medicine › Hematology › Hematopoietic Stem Cell Transplantation
  • Health Sciences › Medicine › Physiology › Erythrocyte Function and Pathophysiology
Keywords
retinoblastoma protein, erythropoiesis, erythroid differentiation, cell cycle exit, mitochondrial biogenesis, ineffective erythropoiesis, anemia, PGC-1β, myelodysplastic syndrome, refractory anemia, conditional gene deletion, erythroid cells
MeSH terms
Anemia, Animals, Organelle Biogenesis, Cell Cycle, Cell Differentiation, Cells, Cultured, Erythroblasts, Erythropoiesis, Flow Cytometry, Mice, Transgenic, Mitochondria, Retinoblastoma Protein, Mice, Knockout, Integrases, Gene Expression Profiling, Mice

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