Inhibition of thioredoxin reductase 1 sensitizes glucose-starved glioblastoma cells to disulfidptosis 3
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PROVIDER: PRJNA1188149 | ENA |
REPOSITORIES: ENA
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Project description:Inhibition of thioredoxin reductase 1 sensitizes glucose-starved glioblastoma cells to disulfidptosis 2
| PRJNA1188130 | ENA
Project description:Inhibition of thioredoxin reductase 1 sensitizes glucose-starved glioblastoma cells to disulfidptosis 1
| PRJNA1188133 | ENA
Project description:Disulfidptosis is a recently identified form of cell death characterized by the aberrant accumulation of cellular disulfides. This process primarily occurs in glucose-starved cells expressing higher levels of SLC7A11 and has been proposed as a therapeutic target for cancers with hyperactive SCL7A11. However, the potential for inducing disulfidptosis through other mechanisms in cancers remains unclear. Here, we found that inhibiting thioredoxin reductase 1 (TrxR1), a key enzyme in the thioredoxin system, induces disulfidptosis in glioblastoma (GBM) cells. TrxR1 expression is elevated in GBM with activated transcriptional coactivator with PDZ-binding motif (TAZ) and correlates with poor prognosis. TrxR1 inhibitors induced GBM cell death that can be rescued by disulfide reducers but not by ROS scavengers or inhibitors of apoptosis, ferroptosis, or necroptosis. Glucose-starved cells, but not those deprived of oxygen or glutamine, increased TrxR1 expression in an NRF2-dependent manner and were more sensitive to TrxR1 inhibition-induced cell death. The dying cells initially exhibited highly dynamic lamellipodia, followed by actin cytoskeleton collapse. This process involved the accumulation of cytosolic peroxisomes and micropinocytic caveolae, as well as small gaps in the plasma membrane. Depletion of the WAVE complex component NCKAP1 partially rescued the cells, whereas Rac inhibition enhanced cell death. In an orthotopic xenograft GBM mouse model, TrxR1 depletion inhibited tumor growth and improved survival. Furthermore, cells undergoing TrxR1 inhibition exhibited features of immunogenic cell death. Therefore, this study suggests the potential of targeting TrxR1 as a therapeutic strategy in GBM.
2024-12-23 | GSE282334 | GEO
Project description:Disulfidptosis is a recently identified form of cell death characterized by the aberrant accumulation of cellular disulfides. This process primarily occurs in glucose-starved cells expressing higher levels of SLC7A11 and has been proposed as a therapeutic target for cancers with hyperactive SCL7A11. However, the potential for inducing disulfidptosis through other mechanisms in cancers remains unclear. Here, we found that inhibiting thioredoxin reductase 1 (TrxR1), a key enzyme in the thioredoxin system, induces disulfidptosis in glioblastoma (GBM) cells. TrxR1 expression is elevated in GBM with activated transcriptional coactivator with PDZ-binding motif (TAZ) and correlates with poor prognosis. TrxR1 inhibitors induced GBM cell death that can be rescued by disulfide reducers but not by ROS scavengers or inhibitors of apoptosis, ferroptosis, or necroptosis. Glucose-starved cells, but not those deprived of oxygen or glutamine, increased TrxR1 expression in an NRF2-dependent manner and were more sensitive to TrxR1 inhibition-induced cell death. The dying cells initially exhibited highly dynamic lamellipodia, followed by actin cytoskeleton collapse. This process involved the accumulation of cytosolic peroxisomes and micropinocytic caveolae, as well as small gaps in the plasma membrane. Depletion of the WAVE complex component NCKAP1 partially rescued the cells, whereas Rac inhibition enhanced cell death. In an orthotopic xenograft GBM mouse model, TrxR1 depletion inhibited tumor growth and improved survival. Furthermore, cells undergoing TrxR1 inhibition exhibited features of immunogenic cell death. Therefore, this study suggests the potential of targeting TrxR1 as a therapeutic strategy in GBM.
2024-12-23 | GSE282325 | GEO
Project description:Disulfidptosis is a recently identified form of cell death characterized by the aberrant accumulation of cellular disulfides. This process primarily occurs in glucose-starved cells expressing higher levels of SLC7A11 and has been proposed as a therapeutic target for cancers with hyperactive SCL7A11. However, the potential for inducing disulfidptosis through other mechanisms in cancers remains unclear. Here, we found that inhibiting thioredoxin reductase 1 (TrxR1), a key enzyme in the thioredoxin system, induces disulfidptosis in glioblastoma (GBM) cells. TrxR1 expression is elevated in GBM with activated transcriptional coactivator with PDZ-binding motif (TAZ) and correlates with poor prognosis. TrxR1 inhibitors induced GBM cell death that can be rescued by disulfide reducers but not by ROS scavengers or inhibitors of apoptosis, ferroptosis, or necroptosis. Glucose-starved cells, but not those deprived of oxygen or glutamine, increased TrxR1 expression in an NRF2-dependent manner and were more sensitive to TrxR1 inhibition-induced cell death. The dying cells initially exhibited highly dynamic lamellipodia, followed by actin cytoskeleton collapse. This process involved the accumulation of cytosolic peroxisomes and micropinocytic caveolae, as well as small gaps in the plasma membrane. Depletion of the WAVE complex component NCKAP1 partially rescued the cells, whereas Rac inhibition enhanced cell death. In an orthotopic xenograft GBM mouse model, TrxR1 depletion inhibited tumor growth and improved survival. Furthermore, cells undergoing TrxR1 inhibition exhibited features of immunogenic cell death. Therefore, this study suggests the potential of targeting TrxR1 as a therapeutic strategy in GBM.
2024-12-23 | GSE282324 | GEO
Project description:The involvement the thioredoxin system in radiation resistance was investigated in human lung cancer cells by a combination of ionizing radiation and specific thioredoxin reductase-inhibition by a phosphine gold compound. Gene expression profiles (Human Gene 1.0 ST) of lung cancer cells subjected to ionizing radiation and/or inhibition of thioredoxin reductase were studied. Data analyses were performed using the Affymetrix GeneChip Operating Software (GCOS) Version 1.4.
2010-12-03 | E-GEOD-25814 | biostudies-arrayexpress
Project description:The involvement the thioredoxin system in radiation resistance was investigated in human lung cancer cells by a combination of ionizing radiation and specific thioredoxin reductase-inhibition by a phosphine gold compound.
2010-12-03 | GSE25814 | GEO
Project description:Transcriptomic study of a thioredoxin reductase knock-out mutant.<br> <br> Biological question :<br> Thioredoxins are small redox proteins implicated in crucial pathways of cell life. They are reduced by a conserved flavoprotein named NADPH-dependent thioredoxin reductase (NTR). In order to give an insight into the functions of the NTR/thioredoxin pathway in Arabidopsis, we have used a reverse genetic approch. Both NTR genes (NTRA and NTRB) have been inactivated in the double ntra ntrb mutant. T-DNA lines have been provided by the SALK library. Surprisingly, this mutant shows a limited phenotype suggested that some additional redox pathways are involved in compensating the inactivation of the NTR/thioredoxin pathway. In order to isolate compensatory genes that would be transcriptionally induced in the ntra ntrb mutant, we have performed this CATMA project.<br> <br> Seeds of the wild-type Col-0 ecotype and of the ntra ntrb homozygote double mutant were sowed in soil. Three replicates of lines were made (Col-0 1, 2 and 3 ntra ntrb 1, 2 and 3) : plants were put at different places of the greenhouse and grown at different times. Germination was synchronized by 4 days at 4C and plants were grown during 17 days, until they reached a 6 rosette leaves stage. Entire plants (30 plants per sample) were harvested, frozen in liquid nitrogen and stored at -80C until extraction.<br> <br>
2005-09-15 | E-MEXP-365 | biostudies-arrayexpress
Project description:Genetic disruption of thioredoxin reductase 1 protects against acetaminophen (APAP) toxicity. To determine the role of the thioredoxin system on xenobiotic metabolism we challeneged wildtype and txnrd1liver-null mice with acetaminophen.
2013-06-08 | GSE37874 | GEO
Project description:The Saccharomyces cerevisiae Yap1p transcription factor is required for the H2O2-dependent activation of many antioxidant genes including the TRX2 gene encoding thioredoxin 2. To identify factors that regulate Yap1p activity, we carried out a genetic screen for mutants that show elevated expression of a TRX2-HIS3 fusion in the absence of H2O2. Two independent mutants isolated in this screen carried mutations in the TRR1 gene encoding thioredoxin reductase. Northern blot and whole-genome expression analysis revealed that the basal expression of most Yap1p targets and many other H2O2-inducible genes is elevated in Deltatrr1 mutants in the absence of external stress. In Deltatrr1 mutants treated with H2O2, the Yap1p targets, as well as genes comprising a general environmental stress response and genes encoding protein-folding chaperones, are hyperinduced. However, despite the elevated expression of genes encoding antioxidant enzymes, Deltatrr1 mutants are extremely sensitive to H2O2. The results suggest that cells lacking thioredoxin reductase have diminished capacity to detoxify oxidants and/or to repair oxidative stress-induced damage and that the thioredoxin system is involved in the redox regulation of Yap1p transcriptional activity.
2005-06-30 | E-SMDB-2716 | biostudies-arrayexpress