Related Experiment Video
Updated: Jun 12, 2026
15:13
Structure-function Studies in Mouse Embryonic Stem Cells Using Recombinase-mediated Cassette Exchange
Published on: April 27, 2017
p130Cas is an essential transducer element in ErbB2 transformation
Sara Cabodi1, Agata Tinnirello, Brigitte Bisaro
1Molecular Biotechnology Center, University of Torino, Torino, Via Nizza 52, 10126 Torino, Italy.
Summary
p130Cas scaffold protein is essential for ErbB2-driven breast cancer growth and metastasis. Silencing p130Cas inhibited tumor formation and progression, suggesting it as a therapeutic target for ErbB2-positive breast cancers.
Area of Science:
- Oncology
- Molecular Biology
- Cell Biology
Background:
- ErbB2 oncogene overexpression correlates with poor prognosis in breast cancer.
- p130Cas is a scaffold protein regulating cell functions like survival, migration, and proliferation.
- Understanding p130Cas's role in ErbB2-driven tumors is crucial for therapeutic development.
Purpose of the Study:
- To investigate the functional role of p130Cas in ErbB2-dependent breast tumorigenesis.
- To assess the therapeutic potential of targeting p130Cas in ErbB2-positive breast cancers.
Main Methods:
- Silencing p130Cas in mouse breast cancer cells (N202-1A) overexpressing ErbB2.
- Reexpressing p130Cas in ErbB2-transformed p130Cas-null mouse embryonic fibroblasts.
- In vivo studies including orthotopic tumor growth, spontaneous tumor reduction via siRNA, and metastasis analysis.
- Analysis of molecular complexes involving ErbB2, c-Src, Fak, and downstream signaling pathways (Rac1, MMP9).
Main Results:
- p130Cas is indispensable for ErbB2-mediated foci formation, anchorage-independent growth, and orthotopic tumor growth.
- Intranipple delivery of p130Cas-targeting siRNAs reduced spontaneous tumor growth in mice.
- p130Cas forms a complex with ErbB2, c-Src, and Fak, sustaining signaling pathways.
- ErbB2 activation and p130Cas overexpression promote Rac1 activation and MMP9 secretion, enhancing invasiveness and metastasis.
Conclusions:
- p130Cas acts as a critical transducer of ErbB2 signaling in breast cancer development and progression.
- p130Cas is essential for ErbB2-driven cell transformation, invasion, and metastasis.
- p130Cas represents a promising novel therapeutic target for ErbB2-positive human breast cancers.
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