Cited by 68Hematopoietic Stem Cell TransplantationMesenchymal stem cell researchBlood disorders and treatments

A limited role for p16Ink4a and p19Arf in the loss of hematopoietic stem cells during proliferative stress.

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Stepanova, Lilia, Sorrentino, Brian P.·2005·Blood

Abstract

It has long been known that prolonged culture or serial transplantation leads to the loss of hematopoietic stem cells (HSCs); however, the mechanisms for this loss are not well understood. We hypothesized that expression of p16Ink4a or p19Arf or both may play a role in the loss of HSCs during conditions of enhanced proliferation, either in vitro or in vivo. Arf was not expressed in freshly isolated HSCs from adult mice but was induced in phenotypically primitive cells after 10 to 12 days in culture. When cultured bone marrow cells from either Arf-/- or Ink4a-Arf-/- mice were compared to wild-type cells in a competitive repopulation assay, no significant differences in HSC activity were seen. We then evaluated the role of p19Arf and p16Ink4a in the loss of HSCs during serial transplantation. Bone marrow cells from Ink4a-Arf-/-, but not Arf-/-, mice had a modestly extended life span and, on average, supported reconstitution of one additional recipient compared to wild-type cells. Mice given transplants of Ink4a-Arf-/-cells eventually did die of hematopoietic failure in the next round of transplantation. We conclude that mechanisms independent of the Ink4a-Arf gene locus play a dominant role in HSC loss during conditions of proliferative stress.

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  1. Cheng T, Rodrigues N, Shen H, et al. Hematopoi- etic stem cell quiescence maintained by p21cip1/ waf1. Science. 2000;22:5506-5517.

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Authors
Stepanova, L., & Sorrentino, B. P.
Affiliations
St. Jude Children's Research Hospital (US)
Venue
Blood
Published
2005-08-01
Volume
106
Issue
3
Pages
827-832
ISSN
  • 0006-4971 (ISSN-L)
  • 1528-0020
OpenAlex
W2016153631
Cited by
68
References
23
Citations by year
2025: 1 · 2024: 1 · 2023: 1 · 2022: 3 · 2021: 1 · 2020: 1 · 2018: 3 · 2017: 1 · 2015: 2 · 2014: 6 · 2013: 5 · 2012: 5
FWCI
5.51
Type
journal article
Language
en
Open access
Locations
  • Blood (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Assisi Foundation of Memphis
  • American Lebanese Syrian Associated Charities (CA 21765)
  • National Heart, Lung, and Blood Institute (P01HL053749, HL53749)
  • National Cancer Institute (P 30CA 21765, P30CA021765)
Topics
  • Health Sciences › Medicine › Hematology › Hematopoietic Stem Cell Transplantation
  • Health Sciences › Medicine › Genetics › Mesenchymal stem cell research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Blood disorders and treatments
Keywords
hematopoietic stem cells, p16INK4a, p19ARF, INK4a/ARF locus, serial transplantation, competitive repopulation, bone marrow, hematopoietic failure, cellular senescence
MeSH terms
Animals, Bone Marrow Cells, Cell Survival, Cells, Cultured, Female, Hematopoietic Stem Cells, Mice, Inbred C57BL, Bone Marrow Transplantation, Cellular Senescence, Mice, Knockout, Cyclin-Dependent Kinase Inhibitor p16, Tumor Suppressor Protein p14ARF, Cell Proliferation, Mice

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