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Development of mRNA and lincRNA expression signatures of MEFs deficient in ER stress mediators for tunicamycin treatment

ABSTRACT: To further development of our mRNA or lincRNA expression approach to ER stress, we have employed whole genome microarray expression profiling as a discovery platform to identify ER stress-responsible genes. Mouse embryonic fibroblasts (MEFs) deficient in each ER stress mediator (XBP1, ATF4, ATF6a or ATF6b) were treated with tunicamycin for 12 or 24 hrs. Genes responsible for tunicamycin in each mediator-dependent manner were extracted and categorized by Gene Ontology. Among them, expression of five ER-related genes (Derl1, Ssr3, Magt1, Bet1 and Mcfd2) was quantified in the RNA samples from COS7 cells by real-time PCR, confirming existence of similar mechanisms of trancriptional activation in ER stress by tunicamycin treatment.

ORGANISM(S): Mus musculus

PROVIDER: GSE35173 | GEO | 2015/01/18

SECONDARY ACCESSION(S): PRJNA155981

REPOSITORIES: GEO

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Development of mRNA and lincRNA expression signatures of MEFs deficient in ER stress mediators for tunicamycin treatment

Project description:To further development of our mRNA or lincRNA expression approach to ER stress, we have employed whole genome microarray expression profiling as a discovery platform to identify ER stress-responsible genes. Mouse embryonic fibroblasts (MEFs) deficient in each ER stress mediator (XBP1, ATF4, ATF6a or ATF6b) were treated with tunicamycin for 12 or 24 hrs. Genes responsible for tunicamycin in each mediator-dependent manner were extracted and categorized by Gene Ontology. Among them, expression of five ER-related genes (Derl1, Ssr3, Magt1, Bet1 and Mcfd2) was quantified in the RNA samples from COS7 cells by real-time PCR, confirming existence of similar mechanisms of trancriptional activation in ER stress by tunicamycin treatment. Mouse embryonic fibroblasts (MEFs) deficient in each ER stress mediator (XBP1, ATF4, ATF6a or ATF6b) were treated with 2ug/mL tunicamycin for 12 or 24 hrs. Two independent experiments were performed for each mediator-deficient MEF at each time (untreated, 12 or 24 hrs). Genes responsible for tunicamycin in each mediator-dependent manner were extracted and categorized by Gene Ontology in GeneRanker program of Genomatix platform.

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Project description:To further development of our miRNA expression approach to ER stress, we have employed miRNA microarray expression profiling as a discovery platform to identify ER stress-responsible ones. Mouse embryonic fibroblasts (MEFs) deficient in a ER stress mediator XBP1 were treated with tunicamycin for 12 or 24 hrs. miRNAs responsible for tunicamycin-treatment for 12hrs in XBP1-dependent manner were extracted. Among them, expression of three miRNAs (miR-23a, miR-27a, miR-24-2) was quantified in the RNA samples from the same as the microarray, and COS7 cells by real-time PCR, confirming existence of similar mechanisms of trancriptional repression in ER stress by tunicamycin treatment. Mouse embryonic fibroblasts (MEFs) deficient in a ER stress mediator XBP1 were treated with 2ug/mL tunicamycin for 12 or 24 hrs. Two independent experiments were performed at each time (untreated, 12 or 24 hrs). miRNAs responsible for tunicamycin-treatment for 12hrs in XBP1-dependent manner were extracted.

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Development of miRNA expression signatures of MEFs deficient in a ER stress mediator ATF6a for tunicamycin treatment

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Project description:To further development of our mRNA expression approach to ER stress, we have employed whole genome microarray expression profiling as a discovery platform to identify ER stress-responsible genes. LS174T cells were overexpressed with ER stress mediators, ATF6a or ATF6b. Genes responsible for each mediator were extracted and categorized by Gene Ontology. ATF6a and ATF6b were overexpressed in LS174T. Subsequently, cells were treated with 2 mM sodium butyrate, which induces LS174T cells to differentiate to mature goblet cells. Genes responsible for each mediator were extracted and categorized by Gene Ontology in GeneRanker program of Genomatix platform.

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