LIM-homeobox gene 2 promotes tumor growth and metastasis by inducing autocrine and paracrine PDGF-B signaling

Kuzmanov, Aleksandar and Hopfer, Ulrike and Marti, Patricia and Meyer-Schaller, Nathalie and Yilmaz, Mahmut and Christofori, Gerhard. (2014) LIM-homeobox gene 2 promotes tumor growth and metastasis by inducing autocrine and paracrine PDGF-B signaling. Molecular oncology, Vol. 8, H. 2. pp. 401-416.

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Official URL: http://edoc.unibas.ch/dok/A6428641

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An epithelial-mesenchymal transition (EMT) is a critical process during embryonic development and the progression of epithelial tumors to metastatic cancers. Gene expression profiling has uncovered the transcription factor LIM homeobox gene 2 (Lhx2) with up-regulated expression during TGFβ-induced EMT in normal and cancerous breast epithelial cells. Loss and gain of function experiments in transgenic mouse models of breast cancer and of insulinoma in vivo and in breast cancer cells in vitro indicate that Lhx2 plays a critical role in primary tumor growth and metastasis. Notably, the transgenic expression of Lhx2 during breast carcinogenesis promotes vessel maturation, primary tumor growth, tumor cell intravasation and metastasis by directly inducing the expression of platelet-derived growth factor (PDGF)-B in tumor cells and by indirectly increasing the expression of PDGF receptor-β (PDGFRβ) on tumor cells and pericytes. Pharmacological inhibition of PDGF-B/PDGFRβ signaling reduces vessel functionality and tumor growth and Lhx2-induced cell migration and cell invasion. The data indicate a dual role of Lhx2 during EMT and tumor progression: by inducing the expression of PDGF-B, Lhx2 provokes an autocrine PDGF-B/PDGFRβ loop required for cell migration, invasion and metastatic dissemination and paracrine PDGF-B/PDGFRβ signaling to support blood vessel functionality and, thus, primary tumor growth.
Faculties and Departments:03 Faculty of Medicine > Departement Biomedizin > Former Units at DBM > Tumor Biology (Christofori)
UniBasel Contributors:Christofori, Gerhard M.
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:02 Oct 2015 10:00
Deposited On:02 Oct 2015 10:00

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