Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA234099 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Effects of calcitriol on expressions of ER stress related genes were evaluated with microarray. Calcitriol, the active form of vitamin D, is known to induce apoptosis in cancer cells and increase intracellular calcium. Increase in cytopalsmic calcicium levels may indicate a decrease in endoplasmic reticulum (ER) calcium levels since ER is the main storage unit for calcium. Decrease in ER calcium levels are known to induce ER stress which can lead to apoptosis. However the effects of calcitriol on ER stress have not been reported before. Here we hypotesized that the cellular effects of calcitriol can be explained by induction of ER stress. We have tested this hypothesis by assessing calcitriol induced transcriptomic alterations with a focus on ER stress related genes.
2015-01-01 | GSE53975 | GEO
Project description:PUR alpha protein induces endoplasmic reticulum stress response and cell differentiation pathways in prostate cancer
| PRJNA111461 | ENA
Project description:Endoplasmic reticulum (ER) stress triggers an adaptive response which fosters tumor cell survival and resilience to stress conditions. Activation of the endoplasmic reticulum stress response, through its PERK branch, promotes the phosphorylation of the α-subunit of translation initiation factor eIF2alpha, thereby repressing general protein translation and selectively augmenting the translation of ATF4 with the downstream CHOP transcription factor and the protein disulfide oxidase ERO1. Here, we show that ISRIB, a small molecule, which inhibits the action of the phosphorylated α-subunit of eIF2, thereby activating protein translation, synergistically interacts with the genetic deficiency of protein disulfide oxidase ERO1 enfeebling tumor growth and spreading. ISRIB represses CHOP signal but surprisingly does not inhibit ERO1. Mechanistically, ISRIB increases the ER protein load with a prominent perturbing effect on ERO1 deficient Triple-Negative breast cells, which have adapted to live with low client protein load, while ERO1 deficiency selectively impairs VEGF-dependent angiogenesis. Strikingly, ERO1-deficient Triple Negative Breast Cancer xenografts have augmented ER stress response and PERK branch. In vivo, ISRIB synergistically with ERO1 deficiency inhibits the growth of Triple-Negative Breast cancer xenografts by impairing proliferation and angiogenesis, while it is not effective on the xenograft counterparts with ERO1. In summary, these results demonstrate that ISRIB together with ERO1 deficiency synergistically shatters a feature of the adaptive ER stress response while ERO1 deficiency selectively impairs angiogenesis in tumors, thereby together promoting tumor cytotoxicity. Therefore, our findings suggest two surprising findings in breast tumors: ERO1 is not regulated via CHOP and ISRIB represents a therapeutic option to efficiently inhibit tumor progression in those tumors with limited ERO1 and high PERK.
2022-07-20 | E-MTAB-11313 | biostudies-arrayexpress
Project description:Endoplasmic reticulum (ER) stress and the unfolded protein response (UPR)
| PRJNA137213 | ENA
Project description:Fisetin induces autophagy in pancreatic cancer cells via endoplasmic reticulum stress- and mitochondrial stress-dependent pathways
| PRJNA481372 | ENA
Project description:Epithelial-to-Mesenchymal Transition (EMT) is a key process contributing to the aggressiveness of cancer cells. EMT is triggered by activation of different transcription factors collectively known as EMT-TFs. Different cellular cues and cell signalling networks activate EMT at transcriptional and posttranscriptional level in different biological and pathological situations. Among them, overexpression of LOXL2 (lysyl oxidase-like 2) induces EMT independent of its catalytic activity. Remarkably, perinuclear/cytoplasmic accumulation of LOXL2 is a poor prognosis marker of squamous cell carcinomas and is associated to basal breast cancer metastasis by mechanisms no yet fully understood. Here, we report that overexpression of LOXL2 promotes its accumulation in the Endoplasmic Reticulum where it interacts with HSPA5 leading to activation of the IRE1-XBP1-branch of the Unfolded Protein Response (UPR). LOXL2-dependent UPR activation induces the expression of several EMT-TFs: SNAI1, SNAI2, ZEB2 and TCF3 that are direct transcriptional targets of XBP1. Remarkably, inhibition of IRE1 blocks LOXL2-dependent upregulation of EMT-TFs thus hindering EMT induction. LOXL2 relationship to Endoplasmic Reticulum Stress
2017-05-11 | GSE90605 | GEO
Project description:S4, a sulfonamide drug, has been confirmed to induce apoptosis and autophagy in cancer cells. Immunogenic cell death is a special cell death type which is closely related to apoptosis and autophagy. We performed RNA-seq to determine the impact of S4 on global gene expression profile in LN229 cells. Our results show that S4 induces immunogenic cell death via the response to endoplasmic reticulum stress.
2022-06-13 | GSE205538 | GEO
Project description:Transcriptome response to endoplasmic reticulum stress in rat oligodendrocyte precursor cells
| PRJNA322543 | ENA
Project description:CARM1 determines endoplasmic reticulum stress response by controlling XBP1 in ovarian cancer
| PRJNA660169 | ENA
Project description:Increased endoplasmic reticulum stress response is involved in clopidogrel-induced apoptosis of gastric epithelial cells
| PRJNA206434 | ENA