PuSH - Publication Server of Helmholtz Zentrum München: The tumour-associated antigen EpCAM upregulates the fatty acid binding protein E-FABP.

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Münz, M. ; Zeidler, R.* ; Gires, O.

The tumour-associated antigen EpCAM upregulates the fatty acid binding protein E-FABP.

Cancer Lett. 225, 151-157 (2005)

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Open Access Green as soon as Postprint is submitted to ZB.

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The epithelial cell adhesion molecule, EpCAM, is a transmembrane glycoprotein associated with both benign and malignant proliferation. In cancer cells, expression levels of this tumour-associated antigen correlate positively with the grade of dysplasia and are also a negative prognostic factor for breast cancer patients. De novo expression of EpCAM resulted in the rapid upregulation of the proto-oncogene c-Myc along with enhanced cell proliferation and metabolism. Here, we analyzed the effects of EpCAM onto the proteome of epithelial cells. The epidermal fatty acid binding protein, E-FABP, was identified as a new EpCAM-regulated protein. E-FABP is a major target of c-Myc and was rapidly upregulated upon induction of EpCAM. Additionally, E-FABP levels correlated with the amount of EpCAM in permanent squamous cell carcinoma lines and in vivo in primary head and neck carcinomas. Taken together, these results provide further evidence for the direct involvement of EpCAM in signalling processes, gene regulation, and cellular metabolism supporting its important role in tumour biology.

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