Cited by 1,339Acute Myeloid Leukemia ResearchHematopoietic Stem Cell TransplantationBlood disorders and treatments

Tet2 loss leads to increased hematopoietic stem cell self-renewal and myeloid transformation

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Moran-Crusio, Kelly, Reavie, Linsey, Shih, Alan, Abdel-Wahab, Omar, Ndiaye-Lobry, Delphine, Lobry, Camille, Figueroa, Maria E., Vasanthakumar, Aparna +16 more·2011·Cancer Cell

Abstract

Somatic loss-of-function mutations in the ten-eleven translocation 2 (TET2) gene occur in a significant proportion of patients with myeloid malignancies. Although there are extensive genetic data implicating TET2 mutations in myeloid transformation, the consequences of Tet2 loss in hematopoietic development have not been delineated. We report here an animal model of conditional Tet2 loss in the hematopoietic compartment that leads to increased stem cell self-renewal in vivo as assessed by competitive transplant assays. Tet2 loss leads to a progressive enlargement of the hematopoietic stem cell compartment and eventual myeloproliferation in vivo, including splenomegaly, monocytosis, and extramedullary hematopoiesis. In addition, Tet2(+/-) mice also displayed increased stem cell self-renewal and extramedullary hematopoiesis, suggesting that Tet2 haploinsufficiency contributes to hematopoietic transformation in vivo.

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Crossref · 10.1016/j.ccr.2011.06.001

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  • Loss of Tet2 increases hematopoietic stem cell self-renewal while progressively decreasing their ability to undergo differentiation commitment, yet is insufficient to drive leukemogenesis.

    “For instance, loss of Tet2 increases hematopoietic stem cell (HSC) self-renewal while progressively decreasing their ability to undergo differentiation commitment, yet is insufficient to drive leukemogenesis (17).”

    From PU.1-Dependent Enhancer Inhibition Separates <i>Tet2</i> -Deficient Hematopoiesis from Malignant Transformation (2022) · cites this paper as [17]

    The Results sections on HSC self-renewal and progressive defects in hematopoiesis support increased self-renewal and impaired differentiation after Tet2 loss, though they do not establish a progressively declining ability to commit to differentiation specifically. The Results section on CMML-like disease reports that Tet2-deficient mice developed myeloproliferative disease, so the unqualified assertion that Tet2 loss is insufficient to drive leukemogenesis is not supported. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • In mice, loss of Tet2 triggers a late-onset myeloproliferative disease with penetrance inversely correlated with residual Tet2 gene dosage.

    “In mice, loss of Tet2 triggers a late-onset myeloproliferative disease with penetrance inversely correlated with residual Tet2 gene dosage (17).”

    From PU.1-Dependent Enhancer Inhibition Separates <i>Tet2</i> -Deficient Hematopoiesis from Malignant Transformation (2022) · cites this paper as [17]

    The Results section, “Tet2 deficient animals develop CMML-like disease” (page unavailable), reports progressive myeloproliferation in mice, with approximately all Tet2−/− mice showing significant splenomegaly by week 20. The Results section on Tet2 haploinsufficiency (page unavailable) reports dose-dependent effects on hematopoiesis and myeloid transformation, but does not establish that disease penetrance is inversely correlated with residual Tet2 gene dosage. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • In BM chimeras, Tet2+/− PB CD45.2+ cells show increased repopulating capacity compared with WT in the PBS groups.

    “As previously reported, we observed increased repopulating capacity in Tet2+/− PB CD45.2+ compared with WT in the PBS groups.11, 12, 13”

    From Aging drives <i>Tet2</i> <i>+/−</i> clonal hematopoiesis via IL-1 signaling (2023) · cites this paper as [12]

    The Results section, “Tet2 haploinsufficiency is sufficient to initiate aberrant hematopoiesis in vitro and in vivo” (page not supplied), reports that Tet2+/− cells outcompeted wild-type cells in competitive reconstitution experiments, supporting the increased repopulating-capacity comparison. The Bone marrow transplantation procedures identify heterozygous and wild-type cells as CD45.2+, but describe polyI-polyC-induced deletion, not a PBS-treated comparison group. PBS appears there as a cell-preparation buffer, so the PBS-group qualifier is not supported by this copy. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Differential gene-expression analysis of hematopoietic cells isolated from a mouse model carrying hematopoietic-specific deletion of Tet2 uncovered no detectable deregulation of the PU.1 network in either Tet2HET or Tet2KO hematopoietic stem and progenitor cells.

    “Similarly, differential gene-expression analysis of hematopoietic cells isolated from a mouse model, carrying hematopoietic-specific deletion of Tet2 (17), uncovered no detectable deregulation of the PU.1 network in either Tet2HET or Tet2KO hematopoietic stem and progenitor cells (HSPC) [defined throughout this study as cKit+ CD8a–CD4–CD19–B220– (Lymph–) Ter119– (Ery–) cells; Fig. 1E].”
  • Compound mutant cells exhibited greater serial colony-forming activity than Tet2KO cells, which showed extended serial replating activity.

    “Compound mutant cells also exhibited greater serial colony-forming activity than Tet2KO cells, which showed extended serial replating activity, in line with past reports (17, 32).”

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Authors
Moran-Crusio, K., Reavie, L., Shih, A., Abdel-Wahab, O., Ndiaye-Lobry, D., Lobry, C., Figueroa, M. E., Vasanthakumar, A., Patel, J., Zhao, X., Perna, F., Pandey, S., Madzo, J., Song, C., Dai, Q., He, C., Ibrahim, S., Beran, M., Zavadil, J., Nimer, S. D., Melnick, A., Godley, L. A., Aifantis, I., & Levine, R. L.
Affiliations
  • Howard Hughes Medical Institute (US)
  • Memorial Sloan Kettering Cancer Center (US)
  • University of Chicago (US)
  • New York University (US)
  • The University of Texas MD Anderson Cancer Center (US)
  • Weill Cornell Medicine (US)
Corresponding author
  • Aifantis, Iannis
  • Levine, Ross L.
Venue
Cancer Cell
Publisher
Elsevier BV
Published
2011-07
Volume
20
Issue
1
Pages
11-24
ISSN
1535-6108 (ISSN-L)
OpenAlex
W2116205277
Cited by
1,339
References
41
Citations by year
2026: 64 · 2025: 62 · 2024: 79 · 2023: 94 · 2022: 109 · 2021: 100 · 2020: 109 · 2019: 80 · 2018: 76 · 2017: 86 · 2016: 104 · 2015: 88 · 2014: 103 · 2013: 89 · 2012: 65
FWCI
62.76
Type
journal article
Language
en
Open access
Locations
  • Cancer Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Irma T. Hirschl Trust
  • Leukemia and Lymphoma Society
  • American-Italian Cancer Foundation
  • American Cancer Society (RSG0806801)
  • Burroughs Wellcome Fund
  • Dana Foundation (1R01CA138234-01, U54CA143798-01)
  • National Institutes of Health (F31-AG039991, R21CA141399, RO1CA105129, RO1CA133379, RO1CA149655, RO1GM088847)
  • Howard Hughes Medical Institute
Topics
  • Health Sciences › Medicine › Hematology › Acute Myeloid Leukemia Research
  • Health Sciences › Medicine › Hematology › Hematopoietic Stem Cell Transplantation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Blood disorders and treatments
Keywords
TET2, hematopoietic stem cells, stem cell self-renewal, myeloid transformation, myeloproliferation, extramedullary hematopoiesis, splenomegaly, monocytosis, conditional knockout mice, haploinsufficiency, myeloid neoplasms, hematopoietic development
MeSH terms
Alleles, Animals, Cell Transformation, Neoplastic, DNA-Binding Proteins, Hematopoiesis, Hematopoietic Stem Cells, Humans, Proto-Oncogene Proteins, Leukemia, Myelomonocytic, Chronic, Gene Deletion, Gene Silencing, Myeloid Cells, Cell Proliferation, Dioxygenases, Mice, Gene Knockout Techniques, Haploinsufficiency

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