De novo formation of the biliary system by TGFβ-mediated hepatocyte transdifferentiation
Open accessAbstract
Transdifferentiation is a complete and stable change in cell identity that serves as an alternative to stem-cell-mediated organ regeneration. In adult mammals, findings of transdifferentiation have been limited to the replenishment of cells lost from preexisting structures, in the presence of a fully developed scaffold and niche 1. Here we show that transdifferentiation of hepatocytes in the mouse liver can build a structure that failed to form in development-the biliary system in a mouse model that mimics the hepatic phenotype of human Alagille syndrome (ALGS)2. In these mice, hepatocytes convert into mature cholangiocytes and form bile ducts that are effective in draining bile and persist after the cholestatic liver injury is reversed, consistent with transdifferentiation. These findings redefine hepatocyte plasticity, which appeared to be limited to metaplasia, that is, incomplete and transient biliary differentiation as an adaptation to cell injury, based on previous studies in mice with a fully developed biliary system 3-6. In contrast to bile duct development 7-9, we show that de novo bile duct formation by hepatocyte transdifferentiation is independent of NOTCH signalling. We identify TGFβ signalling as the driver of this compensatory mechanism and show that it is active in some patients with ALGS. Furthermore, we show that TGFβ signalling can be targeted to enhance the formation of the biliary system from hepatocytes, and that the transdifferentiation-inducing signals and remodelling capacity of the bile-duct-deficient liver can be harnessed with transplanted hepatocytes. Our results define the regenerative potential of mammalian transdifferentiation and reveal opportunities for the treatment of ALGS and other cholestatic liver diseases.
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Lineage-tracing studies in animal models have confirmed that hepatocytes contribute to bile duct remodeling following cholangiocyte injury.
“Lineage-tracing studies in animal models have confirmed that hepatocytes contribute to bile duct remodeling following cholangiocyte injury10,43–48”
From HBO1 functions as an epigenetic barrier to hepatocyte plasticity and reprogramming during liver injury (2025) · cites this paper as [43]
The Abstract (page unavailable) reports hepatocyte fate tracing in mice: after DDC-induced cholestatic liver injury, hepatocytes gave rise to cells in reactive ductules. It also reports that hepatocytes formed functional peripheral bile ducts in mice lacking those ducts. These findings support a hepatocyte contribution to biliary repair, but the paper does not establish that the reported remodeling followed cholangiocyte injury specifically. (LLM, conf=0.83)
Experimental — accuracy not yet measuredReprogramming of differentiated cells into progenitor-like cells is an important injury-repair paradigm independent of adult stem cells in various epithelial tissues in mammals.
“The reprogramming of differentiated cells into progenitor-like cells has recently been discovered as an important injury-repair paradigm independent of adult stem cells in a variety of epithelial tissues in mammals, 1 such as the lung, 2 intestine, 3 pancreas, 4 and liver.5,6”
From Kupffer-cell-derived IL-6 is repurposed for hepatocyte dedifferentiation via activating progenitor genes from injury-specific enhancers (2023) · cites this paper as [6]
The Abstract (page not provided) describes transdifferentiation as an alternative to stem-cell-mediated regeneration and reports hepatocytes forming mature cholangiocytes during liver injury. It also describes similar cell plasticity in other mammalian epithelia. It does not establish the claimed transition into progenitor-like cells; its demonstrated endpoint is another differentiated cell type. (LLM, conf=0.83)
Experimental — accuracy not yet measuredHepatocytes display remarkable plasticity and under some conditions can transdifferentiate into BECs.
“Hepatocytes display remarkable plasticity and under some conditions can transdifferentiate into BECs, epithelial cells of the bile ducts with completely different morphology, gene expression and function59,[97], [98], [99]”
From Distinct hepatocyte identities in liver homeostasis and regeneration (2023) · cites this paper as [98]
Hepatocyte-to-BEC transdifferentiation can be permanent.
“This showed that hepatocyte-to-BEC transdifferentiation can be permanent.98”
From Distinct hepatocyte identities in liver homeostasis and regeneration (2023) · cites this paper as [98]
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References 55 · Cited by 289
Research works printed but not linked: 47
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- Authors
- Schaub, J. R., Huppert, K. A., Kurial, S. N. T., Hsu, B. Y., Cast, A. E., Donnelly, B., Karns, R. A., Chen, F., Rezvani, M., Luu, H. Y., Mattis, A. N., Rougemont, A.-L., Rosenthal, P., Huppert, S. S., & Willenbring, H.
- Affiliations
- University of California, San Francisco (US)
- Cincinnati Children's Hospital Medical Center (US)
- University Hospital of Geneva (CH)
- Corresponding author
- Huppert, Stacey S.
- Willenbring, Holger
- ORCID
- Venue
- Nature
- Published
- 2018-05
- Volume
- 557
- Issue
- 7704
- Pages
- 247-251
- ISSN
- 0028-0836 (ISSN-L)
- 1476-4687
- PMC
- PMC6597492
- OpenAlex
- W2801786525
- Cited by
- 289
- References
- 55
- Citations by year
- 2026: 19 · 2025: 40 · 2024: 33 · 2023: 31 · 2022: 43 · 2021: 42 · 2020: 40 · 2019: 26 · 2018: 14
- FWCI
- 19.11
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Nature (publishedVersion)
- PubMed (publishedVersion)
- Archive ouverte UNIGE (University of Geneva) (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- RePEc: Research Papers in Economics (submittedVersion)
- eScholarship (California Digital Library) (submittedVersion)
- Archive ouverte UNIGE (University of Geneva) (submittedVersion, cc-by)
- Funders
- National Institute of General Medical Sciences (T32GM008568)
- National Institute of Diabetes and Digestive and Kidney Diseases (R01DK107553, R01DK078640, P30DK026743, P30DK078392, T32DK060414)
- Topics
- Health Sciences › Medicine › Hepatology › Liver physiology and pathology
- Health Sciences › Medicine › Surgery › Pediatric Hepatobiliary Diseases and Treatments
- Health Sciences › Medicine › Surgery › Tissue Engineering and Regenerative Medicine
- Keywords
- hepatocyte transdifferentiation, TGF-beta signaling, cholangiocytes, Alagille syndrome, bile duct formation, Notch signaling, cholestatic liver disease, liver regeneration, cell transplantation, bile duct development
- MeSH terms
- Animals, Bile Ducts, Biliary Tract, Epithelial Cells, Female, Humans, Male, Mice, Inbred C57BL, Signal Transduction, Transforming Growth Factor beta, Alagille Syndrome, Hepatocytes, Cell Proliferation, Mice, Receptors, Notch, Cell Transdifferentiation
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