Cited by 136Liver physiology and pathologyDevelopmental Biology and Gene RegulationCongenital heart defects research

Tbx3 controls the fate of hepatic progenitor cells in liver development by suppressing p19ARF expression

Open access
Suzuki, Atsushi, Sekiya, Sayaka, Büscher, Dirk, Izpisúa Belmonte, Juan Carlos, Taniguchi, Hideki·2008·Development

Abstract

Although the T-box family of transcription factors function in many different tissues, their role in liver development is unknown. Here we show that Tbx3, the T-box gene that is mutated in human ulnar-mammary syndrome, is specifically expressed in multipotent hepatic progenitor cells,`hepatoblasts', isolated from the developing mouse liver. Tbx3-deficient hepatoblasts presented severe defects in proliferation as well as uncontrollable hepatobiliary lineage segregation, including the promotion of cholangiocyte (biliary epithelial cell) differentiation, which thereby caused abnormal liver development. Deletion of Tbx3 resulted in the increased expression of the tumor suppressor p19ARF(Cdkn2a), which in turn induced a growth arrest in hepatoblasts and activated a program of cholangiocyte differentiation. Thus, Tbx3 plays a crucial role in controlling hepatoblast proliferation and cell-fate determination by suppressing p19ARF expression and thereby promoting liver organogenesis.

AI snapshot

Written from the paper’s full text.

TL;DR

Tbx3 is specifically expressed in multipotent mouse hepatoblasts and is required for their proliferation and hepatobiliary lineage segregation. Tbx3 acts by repressing p19ARF; loss of Tbx3 increases p19ARF, causing growth arrest and promoting cholangiocyte differentiation.

Key findings

  • Tbx3 expression was restricted to c-Met+ c-Kit− CD45− Ter119− hepatic epithelial cells/hepatoblasts in E13.5 mouse liver; among T-box genes tested, only Tbx3 was expressed in this population.
  • Tbx3−/− embryonic livers were much smaller, with reduced BrdU-incorporating and PCNA+ proliferating cells but no increase in apoptosis; PCNA+ cells among Hnf4α+ cells were 68.8% in wild-type versus 27.3% in Tbx3−/− livers.
  • Clonal culture of c-Met+ c-Kit− CD45− Ter119− cells showed impaired colony formation in Tbx3−/− cells; after 18 days, wild-type colonies contained ~25% Alb+ hepatocytes and ~60% CK7+ cholangiocytes, whereas Tbx3−/− colonies were 95% CK7+ cholangiocytes and only ~2% Alb+ hepatocytes.
  • Tbx3−/− liver cells upregulated p19ARF and p21WAF1/CIP1; restoring Tbx3 decreased p19ARF, and p19ARF-siRNA partially rescued proliferation of Tbx3-shRNA-expressing hepatoblast progeny. p19ARF overexpression reduced proliferation and increased CK19/CK7 expression and CK7+ cholangiocytes.

Methods

  • Mouse embryonic liver tissue from wild-type, Tbx3+/−, and Tbx3−/− embryos was analyzed, mainly at E12.5–E13.5.
  • Hepatoblasts were prospectively isolated by flow cytometry as c-Met+ c-Kit− CD45− Ter119− cells and analyzed by clonal single-cell culture, immunofluorescence, RT-PCR, and qPCR.
  • Loss- and gain-of-function experiments used Tbx3−/− mice, Tbx3-shRNA, p19ARF-siRNA, and p19ARF overexpression in cultured hepatoblasts.

Limitations

  • The paper states that the transcriptional hierarchy involved in hepatoblast lineage determination should be elucidated in future analyses.
  • The paper notes that phenotypic alterations in Tbx3−/− embryonic liver may also involve subsequent misinteractions of hepatoblasts with other hepatic components, although it argues the defects arise directly from hepatoblasts.
  • Evident from the text: the causal evidence relies heavily on mouse embryonic liver and cultured hepatoblast assays; in vivo rescue of the Tbx3−/− phenotype is not shown, and implications for regeneration or carcinogenesis are discussed but not directly tested.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1242/dev.016634

Cites

26 of 26 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

8 of 14 cited sources checked · 3 supported · 0 flagged · accuracy not yet measured

  • Premisecitation
    § INTRODUCTION

    Isolating c-Met+ c-Kit- CD45- Ter119- cells achieves a much higher enrichment of hepatoblasts.

    “Isolating c-Met + c-Kit - CD45 -Ter119 -(also known as Met, Kit, Ptprc and Ly76, respectively -Mouse Genome Informatics) cells achieved a much higher enrichment of hepatoblasts, and thus this method could facilitate the identification of a discrete set of transcription factors that are activated in this specific cell population.”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites Suzuki et al., 2000 source
    • cites Suzuki et al., 2002 source

      The Results section, “Flow cytometric fractionation of fetal mouse liver cells” (page unavailable), reports 560-fold enrichment of hepatic colony-forming cells. But that enrichment required sorting for CD49f+/low as well as the four markers named in the claim; the paper does not establish the same enrichment for the four-marker selection alone. (LLM, conf=0.88)

      Experimental — accuracy not yet measured
  • Findingown data
    § RESEARCH REPORT

    Tbx3-deficient epithelial cells in the embryonic liver are composed of a few primitive hepatic cells and differentiating hepatocytes marked by Hnf4α and Alb, as well as a relatively large number of CK7+ cholangiocytes.

    “Those Tbx3deficient epithelial cells were composed of a few primitive hepatic cells and differentiating hepatocytes that were marked by the expression of Hnf4α and Alb, as well as a relatively large number of CK7 + cholangiocytes (Fig. 2N-Q).”
    Quote in the paperSubstantial claim
  • Findingown data
    § RESULTS AND DISCUSSION

    In E13.5 liver, Tbx3 is detected only in a portion of Hnf4α+ cells, including primitive hepatic cells and differentiating hepatocytes.

    “by E13.5 Tbx3 was detected only in a portion of Hnf4α + cells, including primitive hepatic cells and differentiating hepatocytes (Fig. 1E-I).”
    Quote in the paperNot a substantial claim
  • Findingown data
    § RESEARCH REPORT

    Overexpression of p19ARF in cultures of wild-type c-Met+ c-Kit- CD45- Ter119- cells results in a significant reduction in the number of proliferating cells.

    “Consistent with the data from the Tbx3 -/-liver, the overexpression of p19 ARF resulted in a significant reduction in the number of proliferating cells (Fig. 4K).”
    Quote in the paperSubstantial claim
  • Findingown data
    § RESEARCH REPORT

    The percentages of PCNA+ cells in Hnf4α+ cells were 68.8% in wild-type and 27.3% in Tbx3-/- embryonic livers.

    “The percentages of PCNA + cells in Hnf4α + cells were 68.8% and 27.3% in the livers of wildtype and Tbx3 -/-embryos, respectively.”
    Quote in the paperSubstantial claim
  • May combine two claims. 16
  • Classified as probably not a substantial claim. 4
  • May combine two claims.

    Premisecitation
    § RESEARCH REPORT

    Tbx3 is a transcriptional repressor for p19ARF and p14ARF.

    “Tbx3 is known as a transcriptional repressor for p19 ARF (Cdkn2a -Mouse Genome Informatics) and p14 ARF (the human ortholog of p19 ARF )”
    Quote in the paperSubstantial claim3 of 3 sources checked
    • cites Honda and Yasuda, 1999 source

      The Introduction (page unavailable) discusses p19ARF binding to Mdm2, and Materials and methods (page unavailable) identifies the p19ARF used as mouse-derived. Searches for Tbx3-mediated transcriptional repression and p14ARF as the human ortholog found no passage addressing either point. (LLM, conf=0.75)

      Experimental — accuracy not yet measured
    • cites Brummelkamp et al., 2002 source
    • cites Lingbeek et al., 2002 source
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation
    § INTRODUCTION

    c-Met+ cells display self-renewing cell divisions and differentiation into both hepatocytes and cholangiocytes in response to Hgf stimulus.

    “In particular, cells marked by the hepatocyte growth factor (Hgf) receptor c-Met displayed distinctive activities in response to Hgf stimulus, including self-renewing cell divisions and differentiation into both hepatocytes and cholangiocytes (Suzuki et al., 2002;Suzuki et al., 2003a).”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites Suzuki et al., 2002 source

      The Results (Flow cytometric fractionation; Clonal expansion and self-renewal capability) identify self-renewing, multilineage H-CFU-C within the c-Met+ cell subpopulation and state that HGF is required for their proliferation. The Discussion (Self-renewal of H-CFU-C in vitro and in vivo) reports divisions yielding both hepatocytes and cholangiocytes, but the cited passages do not establish that HGF stimulus drives differentiation into both lineages. (LLM, conf=0.84)

      Experimental — accuracy not yet measured
    • cites Suzuki et al., 2003a

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Classified as probably not a substantial claim.

    Premisecitation
    § RESEARCH REPORT

    p19ARF and p14ARF are tumor suppressor genes that stabilize p53 via inactivation of Mdm2 in response to oncogenic stresses.

    “the tumor suppressor genes that stabilize p53 (Trp53) via inactivation of Mdm2 in response to a variety of oncogenic stresses (Honda and Yasuda, 1999;Brummelkamp et al., 2002;Lingbeek et al., 2002;Kim and Sharpless, 2006).”
    Quote in the paperSubstantial claim3 of 3 sources checked
    • cites Honda and Yasuda, 1999 source

      The Abstract and the ‘Effect of p19 ARF on Mdm2 activity’ section report that p19ARF inhibits Mdm2 activity, promoting p53 stabilization. The paper does not address p14ARF, and it does not establish this mechanism as a response to a variety of oncogenic stresses; its Introduction discusses genotoxic stress separately. No page numbers are available in our copy. (LLM, conf=0.87)

      Experimental — accuracy not yet measured
    • cites Brummelkamp et al., 2002 source
    • cites Lingbeek et al., 2002 source

      The opening background passage (page unavailable) identifies mouse p19ARF and human p14ARF as counterparts and says p19ARF is induced by oncogenic signaling and leads via MDM2 to stable, active p53. It does not explicitly say that ARF inactivates MDM2, so that specific mechanism is not established by our copy. (LLM, conf=0.82)

      Experimental — accuracy not yet measured
  • May combine two claims.

    Findingown data
    § RESEARCH REPORT

    In Tbx3-/- embryonic liver, the number of BrdU-incorporating or PCNA+ proliferating cells decreases substantially without any increase in apoptotic cells.

    “Indeed, when compared with cells from the wild-type liver, the number of BrdU-incorporating or PCNA + proliferating cells decreased substantially in the absence of Tbx3 (Fig. 2F-I and see Fig. S2 in the supplementary material) without any increase in the number of apoptotic cells (see Fig. S3 in the supplementary material).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data
    § RESEARCH REPORT

    In Tbx3-/- embryonic liver, the number of E-cadherin+ epithelial cells is significantly reduced, whereas the number of N-cadherin+ mesenchymal cells is not affected.

    “Additionally, in the Tbx3 -/-embryonic liver, the number of E-cadherin + epithelial cells was also significantly reduced, whereas the number of N-cadherin + (Ecadherin -) mesenchymal cells was not affected (Fig. 2J-M).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data
    § RESEARCH REPORT

    At day 18 of culture, wild-type colonies contain approximately 25% Alb+ hepatocytes and 60% CK7+ cholangiocytes; Tbx3-/- colonies contain 95% CK7+ cholangiocytes and only approximately 2% Alb+ hepatocytes.

    “At day 18 of culture, differentiating Alb + hepatocytes (~25%) and CK7 + cholangiocytes (~60%) appeared in colonies formed by wild-type cells (Fig. 3E,F,H).In the case of Tbx3 -/-colonies, however, 95% of the cells became CK7 + cholangiocytes, and only a few Alb + hepatocytes (~2%) emerged (Fig. 3G,H).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data
    § RESEARCH REPORT

    Suppression of endogenous Tbx3 by Tbx3-shRNA in cultured hepatoblast progeny inhibits hepatoblast proliferation, represses expression of genes activated during hepatocyte differentiation, and enhances cholangiocyte marker expression.

    “Consistent with the results from the Tbx3 -/-liver study, efficient suppression of endogenous Tbx3 expression inhibited hepatoblast proliferation, repressed the expression of several genes activated during hepatocyte differentiation, and enhanced cholangiocyte marker expression (see Fig. S4C,E-H in the supplementary material).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data
    § RESEARCH REPORT

    p19ARF overexpression upregulates expression of CK19 and CK7 and increases the number of CK7+ cholangiocytes.

    “Surprisingly, p19 ARF overexpression was also effective in upregulating the expression of CK19 and CK7 and increased the number of CK7 + cholangiocytes (Fig. 4L-S).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data
    § RESEARCH REPORT

    In Tbx3-/- embryonic liver, expression levels of genes encoding hepatocyte differentiation markers (Alb, αAT), primitive hepatic cell markers (Afp, c-Met), and transcription factors involved in early hepatocyte differentiation (C/EBPα, Hnf1α, Hnf4α) are all markedly diminished.

    “Quantitative PCR (qPCR) analysis also demonstrated that the expression levels of genes encoding hepatocyte differentiation markers [Alb and α-1antitrypsin (αAT; Serpina1 -Mouse Genome Informatics)], primitive hepatic cell markers [α-fetoprotein (Afp) and c-Met], and transcription factors involved in the early stage of hepatocyte differentiation (C/EBPα, Hnf1α and Hnf4α) were all markedly dim”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data
    § RESEARCH REPORT

    Colony formation by c-Met+ c-Kit- CD45- Ter119- cells from Tbx3-/- liver is significantly impaired, and only small colonies form, despite normal cell attachment.

    “As a result of deleting the Tbx3 gene, colony formation by c-Met + c-Kit -CD45 -Ter119 -cells was significantly impaired, and only small colonies formed, despite cell attachment onto the bottom of wells being normal (Fig. 3C,D).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationown data
    § RESEARCH REPORT

    In the developing liver, Tbx3 acts not only as an activator for proliferation, but also as a regulator for hepatobiliary lineage segregation.

    “Therefore, in the developing liver, Tbx3 acts not only as an activator for proliferation, but also as a regulator for hepatobiliary lineage segregation.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationown data
    § RESEARCH REPORT

    Tbx3 plays an essential role in hepatogenesis by controlling the proliferation and the cell-lineage decision of hepatoblasts.

    “Taken together, we conclude that Tbx3 plays an essential role in hepatogenesis by controlling the proliferation and the cell-lineage decision of hepatoblasts.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationreasoning
    § Atsushi Suzuki

    Tbx3 plays a crucial role in controlling hepatoblast proliferation and cell-fate determination by suppressing p19ARF expression and thereby promoting liver organogenesis.

    “Thus, Tbx3 plays a crucial role in controlling hepatoblast proliferation and cell-fate determination by suppressing p19 ARF expression and thereby promoting liver organogenesis.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation
    § Atsushi Suzuki

    Tbx3 is the T-box gene that is mutated in human ulnar-mammary syndrome.

    “Here we show that Tbx3, the T-box gene that is mutated in human ulnar-mammary syndrome, is specifically expressed in multipotent hepatic progenitor cells, 'hepatoblasts', isolated from the developing mouse liver.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Bamshad et al., 1997 source
  • May combine two claims.

    Premisereasoning
    § RESEARCH REPORT

    In cancer cells, Tbx3 negatively regulates p19ARF expression to induce escape from cellular senescence and to activate mitosis.

    “This evidence suggests that in cancer cells, Tbx3 negatively regulates p19 ARF expression to induce escape from cellular senescence and to activate mitosis.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationreasoning
    § RESEARCH REPORT

    The phenotypic alterations in the Tbx3-/- embryonic liver arose as a direct consequence of the developmental defects of hepatoblasts, although subsequent misinteractions of hepatoblasts with other hepatic components might also be relevant.

    “Therefore, the phenotypic alterations in the Tbx3 -/- embryonic liver arose as a direct consequence of the developmental defects of hepatoblasts, although the subsequent misinteractions of hepatoblasts with other hepatic components might also be relevant to that phenotype.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationreasoning
    § RESEARCH REPORT

    Tbx3 might act as a central regulator for maintaining cells in an undifferentiated state and for activating their proliferation to create the basis of liver organogenesis, until its expression ceases or is superseded by subsequent activation of other transcription factors required for differentiation.

    “Therefore, although a transcriptional hierarchy involved in the lineage determination of hepatoblasts should be elucidated in future analyses, Tbx3 might act as a central regulator for maintaining cells in an undifferentiated state and for activating their proliferation to create the basis of liver organogenesis, until such a time that its expression ceases or is superseded by the subsequent”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim.

    Premisecitation
    § RESEARCH REPORT

    In the intestine, the molecular mechanisms governing homeostatic self-renewal of stem cells and aberrant proliferation of colorectal cancer cells are similar.

    “In the intestine, the molecular mechanisms governing the homeostatic selfrenewal of stem cells and the aberrant proliferation of colorectal cancer cells are similar (Radtke and Clevers, 2005).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Radtke and Clevers, 2005 source
  • May combine two claims.

    Premisecitation
    § RESEARCH REPORT

    The phenotypic features of Tbx3-/- embryos, including diminished liver size, have also been observed in another Tbx3 mutant mouse line, but such liver defects were only discussed as an effect of deficiencies in yolk sac or hematovascular development.

    “The phenotypic features of Tbx3 -/-embryos, including a diminished liver size, have also been observed in another Tbx3 mutant mouse line, but such liver defects were only discussed as an effect of deficiencies in the yolk sac or in hematovascular development (Davenport et al., 2003).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Davenport et al., 2003 source
19 of 19
  • The paper relies on this without support.

    No previous evidence implicated a role for Tbx3 in hepatogenesis.

    “In our study, although there was no previous evidence to implicate a role for Tbx3 in hepatogenesis, searching for T-box genes that are expressed specifically in hepatoblasts led to the identification of Tbx3 as an essential regulator for the proliferation and differentation of hepatoblasts.”
  • The paper relies on this without support.

    The role of T-box family transcription factors in liver development is unknown.

    “Although the T-box family of transcription factors function in many different tissues, their role in liver development is unknown.”
2 of 2

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Suzuki, A., Sekiya, S., Büscher, D., Izpisúa Belmonte, J. C., & Taniguchi, H.
Affiliations
  • Kyushu University (JP)
  • Gene Expression Laboratory, Salk Institute for Biological Studies, 10010 N. Torrey Pines Rd., La Jolla, CA 92037, USA.
  • RIKEN (JP)
Corresponding author
Suzuki, Atsushi
Venue
Development
Published
2008-05-01
Volume
135
Issue
9
Pages
1589-1595
ISSN
  • 0950-1991 (ISSN-L)
  • 1477-9129
OpenAlex
W2144111415
Cited by
136
References
26
Citations by year
2026: 3 · 2025: 6 · 2024: 2 · 2023: 2 · 2022: 7 · 2021: 10 · 2020: 10 · 2019: 8 · 2018: 10 · 2017: 9 · 2016: 7 · 2015: 5 · 2014: 6 · 2013: 11 · 2012: 6
FWCI
7.19
Type
journal article
Language
en
Open access
Locations
  • Development (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Consorzio Interuniversitario Biotecnologie
  • Ministry of Education, Culture, Sports, Science and Technology
  • Ministerio de Economía y Competitividad
  • National Institutes of Health
Topics
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Congenital heart defects research
Keywords
TBX3, hepatic progenitor cells, hepatoblasts, liver development, p19ARF, CDKN2A, cholangiocyte differentiation, cell fate determination, ulnar-mammary syndrome, liver organogenesis, tumor suppressor
MeSH terms
Animals, Cell Differentiation, Cells, Cultured, Liver, Cyclin-Dependent Kinase Inhibitor p16, T-Box Domain Proteins, Multipotent Stem Cells, Cell Proliferation, Mice

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Claims read by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-10-23.

Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-10-23.

Cited sources are checked by gpt-6-sol.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review