Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA293517 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:We set out to determine the role of the IRE1/XBP1 pathway, the most ancient and highly conserved endoplasmic reticulum (ER) stress-sensing pathway of the unfolded protein response (UPR), in Schmid metaphyseal chondrodysplasia (MCDS). RNA derived from hypertrophic zones microdissected from growth plates of wildtype mice, mice lacking XBP1 activity in chondrocytes (Xbp1Cart?Ex2), mice carrying a COL10A1 pN617K mutation (ColXN617K), and compound mutants (C/X) was analyzed by whole genome microarray analysis. 1633 probes were differentially expressed between ColXN617K and wildtype, 215 probes were differentially expressed between Xbp1Cart?Ex2 and wildtype, and 1337 probes were differentially expressed between C/X and wildtype. 885 probes were differentially expressed between ColXN617K and wildtype but not Xbp1Cart?Ex2 and wildtype or C/X and wildtype, thus representing the XBP1-dependent response to hypertrophic chondrocyte ER stress. 688 probes were differentially expressed between ColXN617K and wildtype and between C/X and wildtype but not Xbp1Cart?Ex2 and wildtype, thus representing the XBP1-independent response to hypertrophic chondrocyte ER stress. Results were validated by qPCR. Entire growth plate hypertrophic zones were microdissected from one tibia from each of three 2-week old wildtype mice, three 2-week old mice carrying a COL10A1 p.N617K mutation (ColXN617K), three 2-week old mice lacking XBP1 activity in chondrocytes (Xbp1Cart?Ex2), and three 2-week old mice resulting from a cross between ColXN617K and Xbp1Cart?Ex2 (C/X).
2015-08-21 | E-GEOD-72261 | biostudies-arrayexpress
Project description:We set out to determine the role of the IRE1/XBP1 pathway, the most ancient and highly conserved endoplasmic reticulum (ER) stress-sensing pathway of the unfolded protein response (UPR), in Schmid metaphyseal chondrodysplasia (MCDS). RNA derived from hypertrophic zones microdissected from growth plates of wildtype mice, mice lacking XBP1 activity in chondrocytes (Xbp1CartΔEx2), mice carrying a COL10A1 pN617K mutation (ColXN617K), and compound mutants (C/X) was analyzed by whole genome microarray analysis. 1633 probes were differentially expressed between ColXN617K and wildtype, 215 probes were differentially expressed between Xbp1CartΔEx2 and wildtype, and 1337 probes were differentially expressed between C/X and wildtype. 885 probes were differentially expressed between ColXN617K and wildtype but not Xbp1CartΔEx2 and wildtype or C/X and wildtype, thus representing the XBP1-dependent response to hypertrophic chondrocyte ER stress. 688 probes were differentially expressed between ColXN617K and wildtype and between C/X and wildtype but not Xbp1CartΔEx2 and wildtype, thus representing the XBP1-independent response to hypertrophic chondrocyte ER stress. Results were validated by qPCR.
2015-08-21 | GSE72261 | GEO
Project description:We set out to generate transcriptional maps of chondrocyte UPR gene networks in vivo using two mouse models (Schmid and Cog) of Schmid chondrodysplasia, in order to define the consequences of UPR activation for the adaptation, differentiation, and survival of chondrocytes experiencing ER stress during hypertrophy, thus providing insights into ER stress signaling and its impact on cartilage pathophysiology. Our data demonstrate that both models displayed similar unfolded protein responses (UPRs), involving activation of ER stress sensors Ire1 and Atf6 and upregulation of their downstream targets, including molecular chaperones, foldases, and ER-associated degradation machinery. Also upregulated were the emerging UPR regulators Wfs1 and Syvn1, recently identified UPR components including Armet and Creld2, and genes not previously implicated in ER stress such as Steap1 and Fgf21. Moreover, we transcriptionally profiled the expression of wildtype growth plate zone gene signatures in the mutant hypertrophic zones, in order to define the differentiation status of ER-stressed chondrocytes in the mutant hypertrophic zones. Hypertrophic zone gene upregulation and proliferative zone gene downregulation were both inhibited in Schmid hypertrophic zones, resulting in the persistence of a proliferative chondrocyte-like expression profile in ER-stressed Schmid chondrocytes. For the mutant hypertrophic zone gene expression profiling, the hypertrophic zone from one tibia from each of three two week old Schmid, wildtype (Schmid background), Cog, and wildtype (Cog background) mice was microdissected. In all cases, total RNA was extracted and amplified through two rounds of linear amplification, labelled with Cy3, and interrogated by microarray analysis using the Agilent 44K, mouse whole genome platform.
2012-01-01 | E-GEOD-30628 | biostudies-arrayexpress
Project description:We set out to generate transcriptional maps of chondrocyte UPR gene networks in vivo using two mouse models (Schmid and Cog) of Schmid chondrodysplasia, in order to define the consequences of UPR activation for the adaptation, differentiation, and survival of chondrocytes experiencing ER stress during hypertrophy, thus providing insights into ER stress signaling and its impact on cartilage pathophysiology. Our data demonstrate that both models displayed similar unfolded protein responses (UPRs), involving activation of ER stress sensors Ire1 and Atf6 and upregulation of their downstream targets, including molecular chaperones, foldases, and ER-associated degradation machinery. Also upregulated were the emerging UPR regulators Wfs1 and Syvn1, recently identified UPR components including Armet and Creld2, and genes not previously implicated in ER stress such as Steap1 and Fgf21. Moreover, we transcriptionally profiled the expression of wildtype growth plate zone gene signatures in the mutant hypertrophic zones, in order to define the differentiation status of ER-stressed chondrocytes in the mutant hypertrophic zones. Hypertrophic zone gene upregulation and proliferative zone gene downregulation were both inhibited in Schmid hypertrophic zones, resulting in the persistence of a proliferative chondrocyte-like expression profile in ER-stressed Schmid chondrocytes.
2012-01-01 | GSE30628 | GEO
Project description:Homeostatic control mechanisms are essentil to life. One such mechanism, the unfolded protein response (UPR) operates in all eukarytic cells to adjust protein folding capacity of the endoplasmic reticulum (ER) according to need. UPR induction in all eurkarytic cells to date involves Ire1 (kinase/endonuclease transmembrane protein) mediated a non-convential splicing of Hac1/XBP1 mRNA, encoding for a potent transcription factor. UPR induction causes a comprehensive transcriptional upregulation of the folding capacity in the ER. Here we studied the global transcriptional profile of the UPR in fission yeast. Fission yeast lacks a clear homolog of Hac1/XBP1. Instead Ire1 maintains ER homeostasis through two post-transciptional programs: selective mRNA decay and processing of Bip1 mRNA (encoding for a major HS70-familiy member in the ER) thereby stabilizing it.
2012-11-21 | GSE40298 | GEO
Project description:The unfolded protein response (UPR) allows the endoplasmic reticulum (ER) to recover from the accumulation of misfolded proteins, in part by increasing its folding capacity. IRE1 promotes this remodeling by detecting misfolded ER proteins and activating a transcription factor, XBP-1, through endonucleolytic cleavage of its mRNA. We found that IRE1 independently mediated the rapid degradation of a specific subset of mRNAs. The arrays deposited here show the effects of depletion of IRE1 and XBP-1 on UPR induction in S2 cells. We have characterized the IRE1-dependent repressive branch of this response. Keywords: stress response, RNAi, DTT
2006-05-20 | GSE4867 | GEO
Project description:Ire1 is an endoplasmic reticulum (ER)-located transmembrane protein that triggers the unfolded protein response. I recently noticed that Ire1 is activated not only in response to ER accumulation of unfolded proteins but also alongside diauxic shift in yeast Saccharomyces cerevisiae cells. I thus asked how different the Ire1-target genes upon two distinct scenes, a canonical ER -stressing stimuli and diauxic shift. Thus NGS transcriptome analysis was performed by using IRE1+ and ire1-delta mutant yeast cells under these conditions.
2019-03-01 | E-MTAB-6923 | biostudies-arrayexpress
Project description:The Akita mutation (C96Y) in the insulin gene results in early onset diabetes in both humans and mice. Expression of the mutant proinsulin (C96Y) causes endoplasmic reticulum (ER) stress in pancreatic ?-cells and consequently the cell activates the unfolded protein response (UPR). Since the proinsulin is terminally misfolded however, the ER stress is irremediable and chronic activation of the UPR eventually activates apoptosis in the cell population. We used microarray gene expression arrays to analyze the IRE1-dependent activation of genes in response to misfolded proinsulin expression in an inducible mutant proinsulin (C96Y) insulinoma cell line by inhibiting the IRE1 endoribonucleas activity with a specific inhibitor, 4u8c. Insulinoma cells with doxycycline inducible C96Y-proinsulin expression were either untreated, treated with doxycycline alone or treated with dox and 4u8c. This was done with two biological replicates.
2014-07-16 | E-GEOD-58866 | biostudies-arrayexpress
Project description:Eukaryotic IRE1 mitigates endoplasmic-reticulum (ER) stress by orchestrating the unfolded-protein response (UPR). IRE1 spans the ER membrane, and signals through a cytosolic kinase-endoribonuclease module. The endoribonuclease generates the transcription factor XBP1s by intron excision between similar RNA stem-loop endomotifs, and depletes select cellular mRNAs through regulated IRE1-dependent decay (RIDD). Paradoxically, mammalian RIDD seemingly targets only mRNAs with XBP1-like endomotifs, while in flies RIDD exhibits little sequence restriction. By comparing nascent and total IRE1α-controlled mRNAs in human breast cancer cells, we discovered not only canonical endomotif-containing RIDD substrates, but also many targets lacking recognizable motifs—degraded by a process we coin RIDDLE, for RIDD lacking endomotif. IRE1α displayed two basic endoribonuclease modalities: endomotif-specific cleavage, minimally requiring dimers; and endomotif-independent promiscuous processing, requiring phospho-oligomers. An oligomer-deficient mutant that did not support RIDDLE failed to rescue cancer-cell viability. These results link IRE1α oligomers, RIDDLE, and cell survival, advancing mechanistic understanding of the UPR.
2021-06-01 | GSE169583 | GEO
Project description:Eukaryotic IRE1 mitigates endoplasmic-reticulum (ER) stress by orchestrating the unfolded-protein response (UPR). IRE1 spans the ER membrane, and signals through a cytosolic kinase-endoribonuclease module. The endoribonuclease generates the transcription factor XBP1s by intron excision between similar RNA stem-loop endomotifs, and depletes select cellular mRNAs through regulated IRE1-dependent decay (RIDD). Paradoxically, mammalian RIDD seemingly targets only mRNAs with XBP1-like endomotifs, while in flies RIDD exhibits little sequence restriction. By comparing nascent and total IRE1α-controlled mRNAs in human breast cancer cells, we discovered not only canonical endomotif-containing RIDD substrates, but also many targets lacking recognizable motifs—degraded by a process we coin RIDDLE, for RIDD lacking endomotif. IRE1α displayed two basic endoribonuclease modalities: endomotif-specific cleavage, minimally requiring dimers; and endomotif-independent promiscuous processing, requiring phospho-oligomers. An oligomer-deficient mutant that did not support RIDDLE failed to rescue cancer-cell viability. These results link IRE1α oligomers, RIDDLE, and cell survival, advancing mechanistic understanding of the UPR.
2021-06-01 | GSE169584 | GEO