Expression Patterns of Mouse Repressor Element-1 Silencing Transcription Factor 4 (REST4) and Its Possible Function in Neuroblastoma

Overview

Journal J Mol Neurosci

Specialties Molecular Biology
Neurology

Date 2001 Apr 17

PMID 11303784

Citations 15

Authors

J H Lee

Y G Chai

L B Hersh

Affiliations

Soon will be listed here.

Abstract

The expression pattern of the repressor element-1 silencing transcription factor (REST) also known as the neuron-restrictive silencer factor (NRSF) and its truncated forms have been analyzed in the neuroblastoma cell lines, NS20Y and NIE115 and in NIH3T3 cells. The neuroblastoma cell lines express transcripts of REST/NRSF and its neuron-specific truncated form REST4; with REST4 being the major transcript. NIH3T3 cells express predominantly REST/NRSF, with no detectable REST4. The cellular localization of REST4, determined using a REST4-GFP fusion protein, was shown to be nuclear. Mutational analysis implicates the zinc finger domains as the nuclear-targeting signal. Analysis of reporter-gene activities in the NS20Y cell line showed that the presence of four RE-1/NRSE sequences did not affect promoter activity. However, coexpression of exogenous REST4 produces a small increase in promoter activity of the reporter plasmid, whereas expression of exogenous REST/NRSF leads to repression. In the NIH3T3 cell line, the RE-1/NRSE sequence leads to repression of reporter-gene activity, whereas introduction of exogenous REST4 leads to de-repression. These data indicate that REST4 does not act as a transcriptional repressor. However, they support a mechanism where REST4 can block the repressor activity of REST/NRSF.

Citing Articles

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Neuroinflammation induces synaptic scaling through IL-1β-mediated activation of the transcriptional repressor REST/NRSF.

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