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- W2096547892 abstract "Summary 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 for generation of exocrine acinar cells in utero, this gene 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. 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 may therefore contribute to the resolution of acute or chronic pancreatitis." @default.
- W2096547892 created "2016-06-24" @default.
- W2096547892 creator A5003013528 @default.
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- W2096547892 date "2012-01-01" @default.
- W2096547892 modified "2023-09-27" @default.
- W2096547892 title "Beta-catenin is selectively required for the expansion and regeneration of mature pancreatic acinar cells" @default.
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- W2096547892 doi "https://doi.org/10.1242/dmm.007799" @default.
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