Clinical epigenetics · 2019
Demethylation by low-dose 5-aza-2'-deoxycytidine impairs 3D melanoma invasion partially through miR-199a-3p expression revealing the role of this miR in melanoma.
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Desjobert Cécile, Carrier Arnaud, Delmas Audrey, Marzese Diego M, Daunay Antoine, Busato Florence, Pillon Arnaud, Tost Jörg, Riond Joëlle, Favre Gilles, Etievant Chantal, Arimondo Paola B
Аннотация
BACKGROUND: Efficient treatments against metastatic melanoma dissemination are still lacking. Here, we report that low-cytotoxic concentrations of 5-aza-2'-deoxycytidine, a DNA demethylating agent, prevent in vitro 3D invasiveness of metastatic melanoma cells and reduce lung metastasis formation in vivo.
RESULTS: We unravelled that this beneficial effect is in part due to MIR-199A2 re-expression by promoter demethylation. Alone, this miR showed an anti-invasive and anti-metastatic effect. Throughout integration of micro-RNA target prediction databases with transcriptomic analysis after 5-aza-2'-deoxycytidine treatments, we found that miR-199a-3p downregulates set of genes significantly involved in invasion/migration processes. In addition, analysis of data from melanoma patients showed a stage- and tissue type-dependent modulation of MIR-199A2 expression by DNA methylation.
CONCLUSIONS: Thus, our data suggest that epigenetic- and/or miR-based therapeutic strategies can be relevant to limit metastatic dissemination of melanoma.
RESULTS: We unravelled that this beneficial effect is in part due to MIR-199A2 re-expression by promoter demethylation. Alone, this miR showed an anti-invasive and anti-metastatic effect. Throughout integration of micro-RNA target prediction databases with transcriptomic analysis after 5-aza-2'-deoxycytidine treatments, we found that miR-199a-3p downregulates set of genes significantly involved in invasion/migration processes. In addition, analysis of data from melanoma patients showed a stage- and tissue type-dependent modulation of MIR-199A2 expression by DNA methylation.
CONCLUSIONS: Thus, our data suggest that epigenetic- and/or miR-based therapeutic strategies can be relevant to limit metastatic dissemination of melanoma.
Предметные рубрики MeSH
AnimalsCell Line, TumorCell SurvivalDNA MethylationDecitabineFemaleGene Expression ProfilingGene Expression Regulation, NeoplasticGene Regulatory NetworksHumansLung NeoplasmsMelanomaMiceMicroRNAsNeoplasm InvasivenessNeoplasm TransplantationPromoter Regions, GeneticSequence Analysis, RNASpheroids, CellularUp-Regulation