The notch and TGF-? signaling pathways contribute to the aggressiveness of clear cell renal cell carcinoma.
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ABSTRACT: Background
Despite recent progress, therapy for metastatic clear cell renal cell carcinoma (CCRCC) is still inadequate. Dysregulated Notch signaling in CCRCC contributes to tumor growth, but the full spectrum of downstream processes regulated by Notch in this tumor form is unknown.Methodology/principal findings
We show that inhibition of endogenous Notch signaling modulates TGF-? dependent gene regulation in CCRCC cells. Analysis of gene expression data representing 176 CCRCCs showed that elevated TGF-? pathway activity correlated significantly with shortened disease specific survival (log-rank test, p?=?0.006) and patients with metastatic disease showed a significantly elevated TGF-? signaling activity (two-sided Student's t-test, p?=?0.044). Inhibition of Notch signaling led to attenuation of both basal and TGF-?1 induced TGF-? signaling in CCRCC cells, including an extensive set of genes known to be involved in migration and invasion. Functional analyses revealed that Notch inhibition decreased the migratory and invasive capacity of CCRCC cells.Conclusion
An extensive cross-talk between the Notch and TGF-? signaling cascades is present in CCRCC and the functional properties of these two pathways are associated with the aggressiveness of this disease.
SUBMITTER: Sjolund J
PROVIDER: S-EPMC3149633 | biostudies-literature | 2011
REPOSITORIES: biostudies-literature
Publications
The notch and TGF-β signaling pathways contribute to the aggressiveness of clear cell renal cell carcinoma.
Sjölund Jonas J Boström Anna-Karin AK Lindgren David D Manna Sugata S Moustakas Aristidis A Ljungberg Börje B Johansson Martin M Fredlund Erik E Axelson Håkan H
PloS one 20110803 8
<h4>Background</h4>Despite recent progress, therapy for metastatic clear cell renal cell carcinoma (CCRCC) is still inadequate. Dysregulated Notch signaling in CCRCC contributes to tumor growth, but the full spectrum of downstream processes regulated by Notch in this tumor form is unknown.<h4>Methodology/principal findings</h4>We show that inhibition of endogenous Notch signaling modulates TGF-β dependent gene regulation in CCRCC cells. Analysis of gene expression data representing 176 CCRCCs sh ...[more]
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