The Notch and TGF-β Signaling Pathways Contribute to the Aggressiveness of Clear Cell Renal Cell CarcinomaReportar como inadecuado




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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-β dependent gene regulation in CCRCC cells. Analysis of gene expression data representing 176 CCRCCs showed that elevated TGF-β 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-β signaling activity two-sided Student-s t-test, p = 0.044. Inhibition of Notch signaling led to attenuation of both basal and TGF-β1 induced TGF-β 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-β signaling cascades is present in CCRCC and the functional properties of these two pathways are associated with the aggressiveness of this disease.



Autor: Jonas Sjölund, Anna-Karin Boström , David Lindgren , Sugata Manna, Aristidis Moustakas, Börje Ljungberg, Martin Johansson, Eri

Fuente: http://plos.srce.hr/



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