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A Hidden Human Proteome Signature Characterizes the Epithelial Mesenchymal Transition Program

[ Vol. 26 , Issue. 3 ]

Author(s):

Daniele Vergara, Tiziano Verri, Marina Damato, Marco Trerotola, Pasquale Simeone, Julien Franck, Isabelle Fournier, Michel Salzet* and Michele Maffia*   Pages 372 - 375 ( 4 )

Abstract:


Background: Molecular changes associated with the initiation of the epithelial to mesenchymal transition (EMT) program involve alterations of large proteome-based networks. The role of protein products mapping to non-coding genomic regions is still unexplored.

Objective: The goal of this study was the identification of an alternative protein signature in breast cancer cellular models with a distinct expression of EMT markers.

Methods: We profiled MCF-7 and MDA-MB-231 cells using liquid-chromatography mass/spectrometry (LCMS/ MS) and interrogated the OpenProt database to identify novel predicted isoforms and novel predicted proteins from alternative open reading frames (AltProts).

Results: Our analysis revealed an AltProt and isoform protein signature capable of classifying the two breast cancer cell lines. Among the most highly expressed alternative proteins, we observed proteins potentially associated with inflammation, metabolism and EMT.

Conclusion: Here, we present an AltProts signature associated with EMT. Further studies will be needed to define their role in cancer progression.

Keywords:

Epithelial mesenchymal transition, proteome, alternative proteins, breast cancer, OpenProt database, predicted isoforms.

Affiliation:

Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Department of Medical, Oral and Biotechnological Sciences, "G.d'Annunzio" University of Chieti-Pescara, Department of Medicine and Aging Sciences, "G.d'Annunzio" University of Chieti-Pescara, Italy; Laboratory of Cytomorphology, Center for Advanced Studies and Technology (CAST), “G.d’Annunzio” University of Chieti-Pescara, University of Lille, Inserm, U-1192, Laboratoire Proteomique, Reponse Inflammatoire et Spectrometrie de Masse-PRISM, F-59000, Lille, University of Lille, Inserm, U-1192, Laboratoire Proteomique, Reponse Inflammatoire et Spectrometrie de Masse-PRISM, F-59000, Lille, University of Lille, Inserm, U-1192, Laboratoire Proteomique, Reponse Inflammatoire et Spectrometrie de Masse-PRISM, F-59000, Lille, Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce



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