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Distinct transcriptional MYCN/c-MYC activities are associated with spontaneous regression or malignant progression in neuroblastomas

Open access
Westermann, Frank, Muth, Daniel, Benner, Axel, Bauer, Tobias, Henrich, Kai-Oliver, Oberthuer, André, Brors, Benedikt, Beissbarth, Tim, Vandesompele, Jo, Pattyn, Filip, Hero, Barbara, König, Rainer, Fischer, Matthias, Schwab, Manfred·2008·Genome Biology

Abstract

Background: Amplified MYCN oncogene resulting in deregulated MYCN transcriptional activity is observed in 20% of neuroblastomas and identifies a highly aggressive subtype. In MYCN single-copy neuroblastomas, elevated MYCN mRNA and protein levels are paradoxically associated with a more favorable clinical phenotype, including disseminated tumors that subsequently regress spontaneously (stage 4s-non-amplified). In this study, we asked whether distinct transcriptional MYCN or c-MYC activities are associated with specific neuroblastoma phenotypes. Results: We defined a core set of direct MYCN/c-MYC target genes by applying gene expression profiling and chromatin immunoprecipitation (ChIP, ChIP-chip) in neuroblastoma cells that allow conditional regulation of MYCN and c-MYC. Their transcript levels were analyzed in 251 primary neuroblastomas. Compared to localized-non-amplified neuroblastomas, MYCN/c-MYC target gene expression gradually increases from stage 4s-non-amplified through stage 4-non-amplified to MYCN amplified tumors. This was associated with MYCN activation in stage 4s-non-amplified and predominantly c-MYC activation in stage 4-non-amplified tumors. A defined set of MYCN/c-MYC target genes was induced in stage 4-non-amplified but not in stage 4s-non-amplified neuroblastomas. In line with this, high expression of a subset of MYCN/c-MYC target genes identifies a patient subtype with poor overall survival independent of the established risk markers amplified MYCN, disease stage, and age at diagnosis. Conclusions: High MYCN/c-MYC target gene expression is a hallmark of malignant neuroblastoma progression, which is predominantly driven by c-MYC in stage 4-non-amplified tumors. In contrast, moderate MYCN function gain in stage 4s-non-amplified tumors induces only a restricted set of target genes that is still compatible with spontaneous regression.

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Crossref · 10.1186/gb-2008-9-10-r150

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Metadata

Authors
Westermann, F., Muth, D., Benner, A., Bauer, T., Henrich, K.-O., Oberthuer, A., Brors, B., Beissbarth, T., Vandesompele, J., Pattyn, F., Hero, B., König, R., Fischer, M., & Schwab, M.
Venue
Genome Biology
Published
2008-10-13
Volume
9
Issue
10
Pages
R150-R150
ISSN
  • 1465-6906 (ISSN-L)
  • 1474-760X
OpenAlex
W2138809862
Cited by
264
References
48
FWCI
11.00
Type
journal article
Language
en
Open access
gold

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Westermann, F., Muth, D., Benner, A., Bauer, T., Henrich, K.-O., Oberthuer, A., Brors, B., Beissbarth, T., Vandesompele, J., Pattyn, F., Hero, B., König, R., Fischer, M., & Schwab, M. (2008). Distinct transcriptional MYCN/c-MYC activities are associated with spontaneous regression or malignant progression in neuroblastomas. Genome Biology. https://doi.org/10.1186/gb-2008-9-10-r150

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