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Molecular and Cellular Biology
Article . 2004 . Peer-reviewed
License: ASM Journals Non-Commercial TDM
Data sources: Crossref
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Brn-2 Expression Controls Melanoma Proliferation and Is Directly Regulated by β-Catenin

Authors: Goodall, J; Martinozzi, S; Dexter, T; Champeval, D; Carreira, S; Larue, L; Goding, C;

Brn-2 Expression Controls Melanoma Proliferation and Is Directly Regulated by β-Catenin

Abstract

Constitutive activation of the Wnt/beta-catenin signaling pathway is a notable feature of a large minority of cases of malignant melanoma, an aggressive and increasingly common cancer. The identification of target genes downstream from this pathway is therefore crucial to our understanding of the disease. The POU domain transcription factor Brn-2 has been implicated in control of proliferation and melanoma survival, and its expression is strongly upregulated in melanoma. We show here that in vivo Brn-2 is expressed in melanocytes but not in embryonic day 11.5 melanoblasts and that its expression is directly controlled by the Wnt/beta-catenin signaling pathway in melanoma cell lines and in transgenic mice. Moreover, silent interfering RNA-mediated inhibition of Brn-2 expression in melanoma cells overexpressing beta-catenin results in significantly decreased proliferation. These results, together with the observation that BRAF signaling also induces Brn-2 expression, reveal that Brn-2 is a focus for the convergence of two key melanoma-associated signaling pathways that are linked to cell proliferation.

Keywords

Homeodomain Proteins, Proto-Oncogene Proteins B-raf, Recombinant Fusion Proteins, Mice, Transgenic, Embryo, Mammalian, Proto-Oncogene Proteins c-raf, Cytoskeletal Proteins, Mice, Cell Line, Tumor, Proto-Oncogene Proteins, POU Domain Factors, Trans-Activators, Animals, Humans, Melanocytes, RNA, Small Interfering, Promoter Regions, Genetic, Melanoma, In Situ Hybridization, Signal Transduction

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    citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    109
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Top 10%
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
109
Top 10%
Top 10%
Top 10%
Green
bronze