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Updated: Jul 14, 2025

Mimicking and Manipulating Pancreatic Acinar-to-Ductal Metaplasia in 3-dimensional Cell Culture
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Mimicking and Manipulating Pancreatic Acinar-to-Ductal Metaplasia in 3-dimensional Cell Culture

Published on: February 11, 2019

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Key transcriptional effectors of the pancreatic acinar phenotype and oncogenic transformation

Ana Azevedo-Pouly1, Michael A Hale1, Galvin H Swift1

  • 1Department of Molecular Biology and the Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America.

Plos One
|October 5, 2023
PubMed

Insights

Four transcription factors (Ptf1a, Nr5a2, Foxa2, Gata4) maintain pancreatic acinar cell (PAC) identity. Their loss alters cell function and KrasG12D oncogene susceptibility, revealing complex regulation beyond simple differentiation levels.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Genetics

Background:

  • Mature cellular phenotypes are crucial for physiological stability and disease prevention.
  • Pancreatic acinar cells (PACs) are highly differentiated and maintain specific functions.
  • Transcription factors play a key role in regulating cellular identity and function.

Purpose of the Study:

  • To investigate the transcriptional regulatory roles of Ptf1a, Nr5a2, Foxa2, and Gata4 in maintaining mature PAC phenotypes.
  • To determine how the inactivation of these factors affects PAC transcriptome, metabolism, replication, and susceptibility to oncogenic transformation.
  • To elucidate the collaborative roles of Foxa2 and Gata4 in PAC regulation.

Main Methods:

  • Selective inactivation of individual and combined transcription factors (Ptf1a, Nr5a2, Foxa2, Gata4) in adult mouse PACs.
  • Transcriptome analysis to assess changes in gene expression.
  • Evaluation of metabolic activity, cellular replication, and susceptibility to oncogenic KrasG12D.
  • Ranking of PAC dedifferentiation based on conditional knockout effects.

Main Results:

  • Individual inactivation of Ptf1a, Nr5a2, Foxa2, or Gata4 altered PAC transcriptome and differentiation.
  • Loss of these factors impacted genes for digestive enzymes, anabolic metabolism, and cellular replication.
  • Simultaneous inactivation of Foxa2 and Gata4 showed synergistic disruption and revealed their collaboration in maintaining Ptf1a expression and controlling PAC replication.
  • Loss of Ptf1a or Nr5a2 accelerated Kras-mediated transformation, while Foxa2, Gata4, or both blocked transformation despite dedifferentiation.

Conclusions:

  • Ptf1a, Nr5a2, Foxa2, and Gata4 are critical regulators of mature PAC identity and function.
  • PAC dedifferentiation does not directly correlate with sensitivity to oncogenic KrasG12D.
  • The study reveals complex regulatory networks maintaining cellular homeostasis and resistance to transformation.

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