Project description:S.cerevisiae cells carrying a wild-type TOR1 allele or hyperactive TOR1L2134M allele were treated with the ER stressor, tunicamycin, and differential gene expression was examined between WT TOR1 and hyperactive TOR1LM We used microarrays to examine differential gene expression in cells expressing hyperactive TOR1LM following ER stress . We identified changes in expression of cell wall genes.
Project description:Sustained ER stress is tightly associated with hyperglycemia and type 2 diabetes.However, the molecular mechanisms remain largely unknown.In order to identify genes that are potentially involved in ER stress-associated hyperglycemia, transcriptomics analyses were performed using RNA-sequencing,which revealed that many genes were dys-regulated in the livers of mice treated with tunicamycin.
Project description:NIH 3T3 cells were challenged with tunicamycin for 2, 5 or 10h. MICRO-RNAs that are upregulated or down regulated were identified by micro-ARRAY.
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.
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.