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Molecular and Cellular Biology
Article . 2011 . Peer-reviewed
License: ASM Journals Non-Commercial TDM
Data sources: Crossref
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Rb/E2F Regulates Expression of Neogenin during Neuronal Migration

Authors: Matthew G, Andrusiak; Kelly A, McClellan; Delphie, Dugal-Tessier; Lisa M, Julian; Sonia P, Rodrigues; David S, Park; Timothy E, Kennedy; +1 Authors

Rb/E2F Regulates Expression of Neogenin during Neuronal Migration

Abstract

The Rb/E2F pathway has long been appreciated for its role in regulating cell cycle progression. Emerging evidence indicates that it also influences physiological events beyond regulation of the cell cycle. We have previously described a requirement for Rb/E2F mediating neuronal migration; however, the molecular mechanisms remain unknown, making this an ideal system to identify Rb/E2F-mediated atypical gene regulation in vivo. Here, we report that Rb regulates the expression of neogenin, a gene encoding a receptor involved in cell migration and axon guidance. Rb is capable of repressing E2F-mediated neogenin expression while E2F3 occupies a region containing E2F consensus sites on the neogenin promoter in native chromatin. Absence of Rb results in aberrant neuronal migration and adhesion in response to netrin-1, a known ligand for neogenin. Increased expression of neogenin through ex vivo electroporation results in impaired neuronal migration similar to that detected in forebrain-specific Rb deficiency. These findings show direct regulation of neogenin by the Rb/E2F pathway and demonstrate that regulation of neogenin expression is required for neural precursor migration. These studies identify a novel mechanism through which Rb regulates transcription of a gene beyond the classical E2F targets to regulate events distinct from cell cycle progression.

Keywords

Mice, Knockout, Neurons, Transcription, Genetic, Tumor Suppressor Proteins, Gene Expression Regulation, Developmental, Membrane Proteins, Netrin-1, Retinoblastoma Protein, Mice, HEK293 Cells, Prosencephalon, Cell Movement, E2F3 Transcription Factor, Cell Adhesion, Animals, Humans, Nerve Growth Factors, Promoter Regions, Genetic

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    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%
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    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!
54
Top 10%
Top 10%
Top 10%
bronze