Reprogramming of melanoma cells by embryonic microenvironments

The International Journal of Developmental Biology
Alejandro Díez-TorreJuan Aréchaga

Abstract

In recent years, the reversion of the cancer phenotype of human melanoma cells in developing zebrafish and chick embryos has been reported. The aim of this review is to revise these and other related contributions regarding the regulation of embryonic cancer and to provide a framework with which to understand results from our laboratory on the interactions of human melanoma cells with post-implanted mouse embryos cultured in vitro. To this end, we used the A375 human melanoma cell line transfected with the green fluorescent protein (GFP) gene. Labeled cells were transplanted onto the surface of the developing visceral endoderm of 7.5 dpc mouse embryos. Subsequently, we cultured the transplanted embryos for three days and monitored the movements of GFP labeled human melanoma cells by confocal microscopy. Our results show that ectopic melanoma cells internalize and migrate inside the embryo body in a way reminiscent of neural crest cells. The absence of localized tumor growth after 72 hours of in vitro embryo co-culture suggests that malignant phenotype inhibiting factors are active at the gastrulating stage and during early organogenesis. These results complement previous reports of growth regulation of B16 mouse melanoma cells ...Continue Reading

Citations

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