Program in Molecular Medicine; Department of Molecular Cell and Cancer Biology; Department of Pathology
Cancer Biology | Cell Biology | Neoplasms | Oncology
Oncogenomic studies indicate that copy number variation (CNV) alters genes involved in tumor progression; however, identification of specific driver genes affected by CNV has been difficult, as these rearrangements are often contained in large chromosomal intervals among several bystander genes. Here, we addressed this problem and identified a CNV-targeted oncogene by performing comparative oncogenomics of human and zebrafish melanomas. We determined that the gene encoding growth differentiation factor 6 (GDF6), which is the ligand for the BMP family, is recurrently amplified and transcriptionally upregulated in melanoma. GDF6-induced BMP signaling maintained a trunk neural crest gene signature in melanomas. Additionally, GDF6 repressed the melanocyte differentiation gene MITF and the proapoptotic factor SOX9, thereby preventing differentiation, inhibiting cell death, and promoting tumor growth. GDF6 was specifically expressed in melanomas but not melanocytes. Moreover, GDF6 expression levels in melanomas were inversely correlated with patient survival. Our study has identified a fundamental role for GDF6 and BMP signaling in governing an embryonic cell gene signature to promote melanoma progression, thus providing potential opportunities for targeted therapy to treat GDF6-positive cancers.
Cancer, Development, Oncology
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Copyright © 2018, American Society for Clinical Investigation. Open Access: The JCI is an open access journal. Publisher PDF posted as allowed by the publisher's author rights policy at https://www.jci.org/kiosks/terms.
DOI of Published Version
J Clin Invest. 2018 Jan 2;128(1):294-308. doi: 10.1172/JCI92513. Epub 2017 Dec 4. Link to article on publisher's site
The Journal of clinical investigation
Venkatesan A, Vyas R, Gramann A, Dresser KA, Gujja S, Bhatnagar S, Chhangawala S, Gomes CB, Xi HS, Lian CG, Houvras Y, Edwards YJ, Deng AC, Green MR, Ceol CJ. (2018). Ligand-activated BMP signaling inhibits cell differentiation and death to promote melanoma. Open Access Articles. https://doi.org/10.1172/JCI92513. Retrieved from https://escholarship.umassmed.edu/oapubs/3338