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Expression patterns of mouse repressor element-1 silencing transcription factor 4 (REST4) and its possible function in neuroblastoma

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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.

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Lee, JH., Chai, YG. & Hersh, L.B. Expression patterns of mouse repressor element-1 silencing transcription factor 4 (REST4) and its possible function in neuroblastoma. J Mol Neurosci 15, 205–214 (2000). https://doi.org/10.1385/JMN:15:3:205

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  • DOI: https://doi.org/10.1385/JMN:15:3:205

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