Signatures of protein expression revealed by secretome analyses of cancer associated fibroblasts and melanoma cell lines
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The imbalance of cellular homeostasis during oncogenesis together with the high heterogeneity of tumor-associated stromal cells have a marked effect on the repertoire of the proteins secreted by malignant cells (the secretome). Hence, the study of tumoral secretomes provides insights for understanding the cross-talk between cells within the tumor microenvironment as well as the key effectors for the establishment of the pre-metastatic niche in distant tumor sites. In this context, we performed a proteomic analysis of the secretomes derived from four cell lines: a paired set of fibroblasts - Hs 895. T, a cell line obtained from a lung node metastatic site from a patient who had melanoma and Hs 895.Sk, a skin fibroblast cell line (derived from the same patient); two malignant metastatic melanoma cell lines - A375, a malignant melanoma cell line from primary source and SH-4, a cell line derived from pleural effusion of a patient with metastatic melanoma. Clustering of expression profiles together with functional enrichment analysis resulted in patterns that mirrored each cell type. In addition, these patterns might be the result of cell-specific protein expression programs and reveal the emergence of trends in the co-expression of functionally related proteins in cellular melanoma models.
Liberato T, Pessotti DS., Fukushima I, Kitano ES, Serrano SMT, Zelanis A. Signatures of protein expression revealed by secretome analyses of cancer associated fibroblasts and melanoma cell lines. J. Proteomics. 2018 Mar;174:1-8. doi:10.1016/j.jprot.2017.12.013.
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