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Epigenetic control of melanoma cell invasiveness by the stem cell factor SALL4

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Item Type:Article
Title:Epigenetic control of melanoma cell invasiveness by the stem cell factor SALL4
Creators Name:Diener, J. and Baggiolini, A. and Pernebrink, M. and Dalcher, D. and Lerra, L. and Cheng, P.F. and Varum, S. and Häusel, J. and Stierli, S. and Treier, M. and Studer, L. and Basler, K. and Levesque, M.P. and Dummer, R. and Santoro, R. and Cantù, C. and Sommer, L.
Abstract:Melanoma cells rely on developmental programs during tumor initiation and progression. Here we show that the embryonic stem cell (ESC) factor Sall4 is re-expressed in the Tyr::Nras(Q61K); Cdkn2a(−/−) melanoma model and that its expression is necessary for primary melanoma formation. Surprisingly, while Sall4 loss prevents tumor formation, it promotes micrometastases to distant organs in this melanoma-prone mouse model. Transcriptional profiling and in vitro assays using human melanoma cells demonstrate that SALL4 loss induces a phenotype switch and the acquisition of an invasive phenotype. We show that SALL4 negatively regulates invasiveness through interaction with the histone deacetylase (HDAC) 2 and direct co-binding to a set of invasiveness genes. Consequently, SALL4 knock down, as well as HDAC inhibition, promote the expression of an invasive signature, while inhibition of histone acetylation partially reverts the invasiveness program induced by SALL4 loss. Thus, SALL4 appears to regulate phenotype switching in melanoma through an HDAC2-mediated mechanism.
Keywords:Acetylation, Base Sequence, Carcinogenesis, Cell Adhesion, Cell Lineage, Cell Proliferation, DNA-Binding Proteins, Genetic Epigenesis, Gene Expression Profiling, Histone Deacetylase 2, Histones, Melanocytes, Melanoma, Neoplasm Invasiveness, Neoplasm Micrometastasis, Neoplastic Gene Expression Regulation, Nude Mice, Protein Binding, Skin Neoplasms, Stem Cell Factor, Transcription Factors, Transgenic Mice, Tumor Burden, Tumor Cell Line, Animals, Mice
Source:Nature Communications
Publisher:Nature Publishing Group
Page Range:5056
Date:20 August 2021
Official Publication:https://doi.org/10.1038/s41467-021-25326-8
PubMed:View item in PubMed

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