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Updated: Aug 12, 2026
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Surgical Injury to the Mouse Pancreas through Ligation of the Pancreatic Duct as a Model for Endocrine and Exocrine Reprogramming and Proliferation
Published on: August 7, 2015
TGFβ engages MEK/ERK to differentially regulate benign and malignant pancreas cell function
D R Principe1, A M Diaz2, C Torres2
1University of Illinois College of Medicine, Chicago, IL, USA.
Oncogene
|April 4, 2017
Summary
Transforming growth factor beta (TGFβ) signaling shifts from tumor suppression to promotion in advanced pancreatic cancer. ERK phosphorylation plays a dual role, initially aiding TGFβ
Area of Science:
- Molecular Biology
- Cancer Research
- Cell Signaling
Background:
- Transforming growth factor beta (TGFβ) signaling exhibits dual roles in pancreatic cancer, acting anti-proliferatively in early stages but promoting progression in advanced cancers.
- Understanding the dysregulation of the TGFβ pathway is crucial for developing effective pancreatic cancer therapies.
Purpose of the Study:
- To investigate the role of ERK phosphorylation in TGFβ signaling during pancreatic carcinogenesis.
- To elucidate the differential functions of TGFβ and MEK/ERK pathways in benign, pre-neoplastic, and cancerous pancreatic cells.
Main Methods:
- Generation of mouse models with TGFβ receptor deficiencies.
- Analysis of ERK phosphorylation, pSMAD2, p21, and CDK2 levels in response to TGFβ.
- Inhibition of ERK phosphorylation to assess its impact on TGFβ-induced cellular responses, including EMT.
Main Results:
- TGFβ induced ERK phosphorylation in benign pancreatic duct cells, which was dependent on TGFBR1.
- ERK inhibition in duct cells reduced TGFβ-induced pSMAD2 and p21, prevented CDK2 downregulation, and blocked EMT.
- In neoplastic and cancer cells, ERK's role diverged, with pERK required for p21 upregulation and EMT but not pSMAD2 phosphorylation or CDK2 repression by TGFβ.
Conclusions:
- ERK acts as a key mediator in TGFβ signaling, initially facilitating cell cycle arrest but later antagonizing it during carcinogenesis.
- ERK remains critical for the pathological EMT-inducing effects of TGFβ signaling in pancreatic cancer.
- The TGFβ and MEK/ERK pathways exhibit a complex, stage-dependent interplay in pancreatic neoplasia.
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