Reconstitution of TGFBR2-mediated signaling causes upregulation of GDF-15 in HCT116 colorectal cancer cells

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Abstract

Although inactivating frameshift mutations in the Transforming growth factor beta receptor type 2 (TGFBR2) gene are considered as drivers of microsatellite unstable (MSI) colorectal tumorigenesis, consequential alterations of the downstream target proteome are not resolved completely. Applying a click-it chemistry protein labeling approach combined with mass spectrometry in a MSI colorectal cancer model cell line, we identified 21 de novo synthesized proteins differentially expressed upon reconstituted TGFBR2 expression. One candidate gene, the TGF-ss family member Growth differentiation factor-15 (GDF-15), exhibited TGFBR2-dependent transcriptional upregulation causing increased intracellular and extracellular protein levels. As a new TGFBR2 target gene it may provide a link between the TGF-ss branch and the BMP/GDF branch of SMAD-mediated signaling.

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Lee, J., Fricke, F., Warnken, U., Schnölzer, M., Kopitz, J., & Gebert, J. (2015). Reconstitution of TGFBR2-mediated signaling causes upregulation of GDF-15 in HCT116 colorectal cancer cells. PLoS ONE, 10(6). https://doi.org/10.1371/journal.pone.0131506

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