Cited by 54Pancreatic function and diabetesWnt/β-catenin signaling in development and cancerPancreatic and Hepatic Oncology Research

Beta-catenin is selectively required for the expansion and regeneration of mature pancreatic acinar cells

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Keefe, Matthew, Wang, Hui, De La O, Jean-Paul, Khan, Ameena, Firpo, Matthew A., Murtaugh, L. Charles·2012·Disease Models & Mechanisms

Abstract

The size of the pancreas is determined by intrinsic factors, such as the number of progenitor cells, and by extrinsic signals that control the fate and proliferation of those progenitors. Both the exocrine and endocrine compartments of the pancreas undergo dramatic expansion after birth and are capable of at least partial regeneration following injury. Whether the expansion of these lineages relies on similar mechanisms is unknown. Although we have shown that the Wnt signaling component β-catenin is selectively required in mouse embryos for the generation of exocrine acinar cells, this protein has been ascribed various functions in the postnatal pancreas, including proliferation and regeneration of islet as well as acinar cells. To address whether β-catenin remains important for the maintenance and expansion of mature acinar cells, we have established a system to follow the behavior and fate of β-catenin-deficient cells during postnatal growth and regeneration in mice. We find that β-catenin is continuously required for the establishment and maintenance of acinar cell mass, extending from embryonic specification through juvenile and adult self-renewal and regeneration. This requirement is not shared with islet cells, which proliferate and function normally in the absence of β-catenin. These results make distinct predictions for the relative role of Wnt-β-catenin signaling in the etiology of human endocrine and exocrine disease. We suggest that loss of Wnt-β-catenin activity is unlikely to drive islet dysfunction, as occurs in type 2 diabetes, but that β-catenin is likely to promote human acinar cell proliferation following injury, and might therefore contribute to the resolution of acute or chronic pancreatitis.

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  • Augmented Hedgehog, Notch, and Wnt/b-catenin signaling are mandatory for regeneration in mice after experimental induction of pancreatitis.

    “Among others, augmented Hedgehog, Notch, and Wnt/b-catenin signaling were delineated as mandatory for regeneration in mice after experimental induction of pancreatitis [21–24].”

    From TBX3 is dynamically expressed in pancreatic organogenesis and fine-tunes regeneration (2023) · cites this paper as [24]

    The Results section, ‘β-catenin is required for acinar cell proliferation during regeneration’ (page unavailable), reports reduced proliferation of β-catenin-deficient acinar cells after experimentally induced pancreatitis. The Introduction also reports that Notch1 and the Hedgehog component Smo are required for regeneration in this model. But the Discussion says the role of Wnt proteins themselves remains to be determined, and the paper does not establish that augmented signaling in all three pathways is mandatory for regeneration. (LLM, conf=0.87)

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Authors
Keefe, M., Wang, H., De La O, J.-P., Khan, A., Firpo, M. A., & Murtaugh, L. C.
Affiliations
  • University of Utah (US)
  • Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, Utah, USA;
Corresponding author
Murtaugh, L. Charles
Venue
Disease Models & Mechanisms
Published
2012-01-01
Volume
5
Issue
4
Pages
503-14
ISSN
  • 1754-8403 (ISSN-L)
  • 1754-8411
OpenAlex
W2096547892
Cited by
54
References
67
Citations by year
2026: 1 · 2024: 4 · 2023: 5 · 2022: 4 · 2021: 3 · 2020: 4 · 2019: 3 · 2018: 5 · 2017: 4 · 2016: 5 · 2015: 4 · 2014: 4 · 2013: 6 · 2012: 2
FWCI
5.22
Type
journal article
Language
en
Open access
Locations
  • Disease Models & Mechanisms (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • HighWire Press Open Archive (submittedVersion)
Funders
  • National Institute of General Medical Sciences (T32GM007464)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK075072)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (T32HD07491, T32HD007491)
Topics
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Wnt/β-catenin signaling in development and cancer
  • Health Sciences › Medicine › Oncology › Pancreatic and Hepatic Oncology Research
Keywords
β-catenin, Wnt signaling, pancreatic acinar cells, pancreatic development, pancreatic regeneration, pancreatic endocrine cells, self-renewal, acinar cell proliferation, pancreatitis, type 2 diabetes
MeSH terms
Aging, Animals, Animals, Newborn, Ceruletide, Cell Differentiation, Homeostasis, Humans, Pancreatitis, Regeneration, Gene Deletion, Mice, Knockout, Cell Lineage, Pancreas, Exocrine, Cell Proliferation, beta Catenin, Mice, Acinar Cells

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