Cited by 138TGF-β signaling in diseasesPancreatic and Hepatic Oncology ResearchSignaling Pathways in Disease

Targeting Endogenous Transforming Growth Factor β Receptor Signaling in SMAD4-Deficient Human Pancreatic Carcinoma Cells Inhibits Their Invasive Phenotype

Subramanian, Gayathri, Schwarz, Roderich E., Higgins, Linda, McEnroe, Glenn, Chakravarty, Sarvajit, Dugar, Sundeep, Reiss, Michael·2004·Cancer Research

Abstract

Transforming growth factor-β (TGF-β) suppresses tumor formation by blocking cell cycle progression and maintaining tissue homeostasis. In pancreatic carcinomas, this tumor suppressive activity is often lost by inactivation of the TGF-β-signaling mediator, Smad4. We found that human pancreatic carcinoma cell lines that have undergone deletion of MADH4 constitutively expressed high endogenous levels of phosphorylated receptor-associated Smad proteins (pR-Smad2 and pR-Smad3), whereas Smad4-positive lines did not. These elevated pR-Smad levels could not be attributed to a decreased dephosphorylation rate nor to increased expression of TGF-β type I (TβR-I) or type II (TβR-II) receptors. Although minimal amounts of free bioactive TGF-β1 and TGF-β2 were detected in conditioned medium, treatment with a pan-specific (but not a TGF-β3 specific) TGF-β-neutralizing antibody and with anti-αVβ6 integrin antibody decreased steady-state pSmad2 levels and activation of a TGF-β-inducible reporter gene in neighboring cells, respectively. Thus, activation of TGF-β at the cell surface was responsible for the increased autocrine endogenous and paracrine signaling. Blocking TβR-I activity using a selective kinase inhibitor (SD-093) strongly decreased the in vitro motility and invasiveness of the pancreatic carcinoma cells without affecting their growth characteristics, morphology, or the subcellular distribution of E-cadherin and F-actin. Moreover, exogenous TGF-β strongly stimulated in vitro invasiveness of BxPC-3 cells, an effect that could also be blocked by SD-093. Thus, the motile and invasive properties of Smad4-deficient pancreatic cancer cells are at least partly driven by activation of endogenous TGF-β signaling. Therefore, targeting the TβR-I kinase represents a potentially powerful novel therapeutic approach for the treatment of this disease.

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Crossref · 10.1158/0008-5472.can-04-0018

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  • Early examples showed reduction of breast cancer metastasis in response to anti-TGF-β antibodies or soluble TβRII-based ligand trap.

    “Early examples showed reduction of breast cancer metastasis in response to anti-TGF-β antibodies or soluble TβRII-based ligand trap306,326,327.”

    From TGFβ biology in cancer progression and immunotherapy (2021) · cites this paper as [326]

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Authors
Subramanian, G., Schwarz, R. E., Higgins, L., McEnroe, G., Chakravarty, S., Dugar, S., & Reiss, M.
Affiliations
  • 1Internal Medicine (Medical Oncology) and Departments of
  • Rutgers Cancer Institute (US)
  • 3Scios, Inc., Fremont, California
Venue
Cancer Research
Published
2004-08-01
Volume
64
Issue
15
Pages
5200-5211
ISSN
  • 0008-5472 (ISSN-L)
  • 1538-7445
OpenAlex
W2171478975
Cited by
138
References
91
Citations by year
2026: 1 · 2024: 2 · 2023: 3 · 2022: 1 · 2021: 7 · 2020: 4 · 2019: 5 · 2018: 4 · 2017: 7 · 2016: 4 · 2015: 4 · 2014: 11 · 2013: 7 · 2012: 4
FWCI
4.50
Type
journal article
Language
en
Open access
closed
Locations
  • Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5u01ca094431-04)
  • National Cancer Institute (CA-41556, R01CA041556, CA-94431)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › TGF-β signaling in diseases
  • Health Sciences › Medicine › Oncology › Pancreatic and Hepatic Oncology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Signaling Pathways in Disease
Keywords
TGF-beta signaling, pancreatic cancer, TGF-beta type I receptor, autocrine and paracrine signaling, integrin αvβ6, tumor invasion, cell motility, TGF-beta neutralizing antibody, BxPC-3 cells, therapeutic target
MeSH terms
Receptor, Transforming Growth Factor-beta Type I, Receptor, Transforming Growth Factor-beta Type II, Antigens, Neoplasm, Cell Movement, DNA-Binding Proteins, Enzyme Inhibitors, Humans, Neoplasm Invasiveness, Pancreatic Neoplasms, Phenotype, Phosphorylation, Tumor Cells, Cultured, Wound Healing, Signal Transduction, Trans-Activators, Cadherins, Integrins, Transforming Growth Factor beta, Protein Serine-Threonine Kinases, Gene Deletion, Receptors, Transforming Growth Factor beta, Activin Receptors, Type I, Smad2 Protein, Smad3 Protein, Smad4 Protein, Transforming Growth Factor beta1, Transforming Growth Factor beta2, Transforming Growth Factor beta3

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