Related Experiment Video
Updated: Aug 23, 2026
Studying TGF-β Signaling and TGF-β-induced Epithelial-to-mesenchymal Transition in Breast Cancer and Normal Cells
Published on: October 27, 2020
Glypican-1 antisense transfection modulates TGF-beta-dependent signaling in Colo-357 pancreatic cancer cells
Junsheng Li1, Jörg Kleeff, Hany Kayed
1Department of General Surgery, University of Heidelberg, Heidelberg, Germany.
Abstract:
The heparan sulfate proteoglycan glypican-1 is essential as a co-receptor for heparin binding growth factors, such as HB-EGF and FGF-2, in pancreatic cancer cells. In the present study, the role of glypican-1 in the regulation of TGF-beta signaling was investigated. Colo-357 pancreatic cancer cells were stably transfected with a full-length glypican-1 antisense construct. Cell growth was determined by MTT and soft agar assays. TGF-beta1 induced p21 expression and Smad2 phosphorylation were analyzed by immunoblotting. PAI-1 promoter activity was determined by luciferase assays. Down-regulation of glypican-1 expression by stable transfection of a full-length glypican-1 antisense construct resulted in decreased anchorage-dependent and -independent cell growth in Colo-357 pancreatic cancer cells and attenuated TGF-beta1 induced cell growth inhibition, Smad2 phosphorylation, and PAI-1 promoter activity. There was, however, no significant difference in TGF-beta1 induced p21 expression and Smad2 nuclear translocation. In conclusion, glypican-1 is required for efficient TGF-beta1 signaling in pancreatic cancer cells.
Insights
Glypican-1 is crucial for pancreatic cancer cell growth and TGF-beta1 signaling. Down-regulating glypican-1 reduces tumor cell proliferation and impairs TGF-beta1-mediated growth inhibition.
Area of Science:
- Oncology
- Molecular Biology
- Cell Biology
Background:
- Heparan sulfate proteoglycans, like glypican-1, act as co-receptors for growth factors in pancreatic cancer.
- Glypican-1's specific role in regulating transforming growth factor-beta (TGF-beta) signaling remains to be fully elucidated.
Purpose of the Study:
- To investigate the role of glypican-1 in the regulation of TGF-beta signaling pathways in pancreatic cancer cells.
- To determine how glypican-1 affects TGF-beta1-induced cellular responses, including cell growth and gene expression.
Main Methods:
- Colo-357 pancreatic cancer cells were stably transfected with a glypican-1 antisense construct to down-regulate glypican-1 expression.
- Cell proliferation was assessed using MTT and soft agar assays.
- TGF-beta1-induced signaling was analyzed via immunoblotting for p21 expression and Smad2 phosphorylation, and by luciferase assays for PAI-1 promoter activity.
Main Results:
- Down-regulation of glypican-1 significantly decreased anchorage-dependent and -independent cell growth in Colo-357 cells.
- Attenuated TGF-beta1-induced growth inhibition, Smad2 phosphorylation, and PAI-1 promoter activity were observed upon glypican-1 reduction.
- No significant difference was found in TGF-beta1-induced p21 expression or Smad2 nuclear translocation.
Conclusions:
- Glypican-1 is essential for efficient TGF-beta1 signaling in pancreatic cancer cells.
- The findings suggest glypican-1 plays a critical role in mediating TGF-beta1's effects on cell proliferation and gene regulation in this cancer type.
More Related Videos
08:35Therapeutic Gene Delivery and Transfection in Human Pancreatic Cancer Cells using Epidermal Growth Factor Receptor-targeted Gelatin Nanoparticles
Published on: January 4, 2012
11:06Live Cell Imaging of the TGF- β/Smad3 Signaling Pathway In Vitro and In Vivo Using an Adenovirus Reporter System
Published on: July 30, 2018
