NOX1 is essential for TNFα-induced intestinal epithelial ROS secretion and inhibits M cell differentiation [scRNA-seq]
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE202675 | GEO | 2022/12/27
REPOSITORIES: GEO
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Project description:Loss-of-function mutations of NOX1 is associated with inflammatory bowel disease (IBD). In what epitheial cell types in human colon Nox1 is expressed is unclear. Here we performed RNA seq analysis of 50% WRN or 5% WRN treated human colonoid lines from IBD, UC and heathy donors. We showed Nox1 is mainly expressed in stem cell (50% WRN treated condition ) when comparing to coloncyte (5% WRN treated contion).
2022-12-27 | GSE202777 | GEO
Project description:ObjectiveLoss-of-function mutations in genes generating reactive oxygen species (ROS), such as NOX1, are associated with IBD. Mechanisms whereby loss of ROS drive IBD are incompletely defined.DesignROS measurements and single-cell transcriptomics were performed on colonoids stratified by NOX1 genotype and TNFα stimulation. Clustering of epithelial cells from human UC (inflamed and uninflamed) scRNASeq was performed. Validation of M cell induction was performed by immunohistochemistry using UEA1 (ulex europaeus agglutin-1 lectin) and in vivo with DSS injury.ResultsTNFα induces ROS production more in NOX1-WT versus NOX1-deficient murine colonoids under a range of Wnt-mediated and Notch-mediated conditions. scRNASeq from inflamed and uninflamed human colitis versus TNFα stimulated, in vitro colonoids defines substantially shared, induced transcription factors; NOX1-deficient colonoids express substantially lower levels of STAT3 (signal transducer and activator of transcription 3), CEBPD (CCAAT enhancer-binding protein delta), DNMT1 (DNA methyltransferase) and HIF1A (hypoxia-inducible factor) baseline. Subclustering unexpectedly showed marked TNFα-mediated induction of M cells (sentinel cells overlying lymphoid aggregates) in NOX1-deficient colonoids. M cell induction by UEA1 staining is rescued with H2O2 and paraquat, defining extra- and intracellular ROS roles in maintenance of LGR5+ stem cells. DSS injury demonstrated GP2 (glycoprotein-2), basal lymphoplasmacytosis and UEA1 induction in NOX1-deficiency. Principal components analyses of M cell genes and decreased DNMT1 RNA velocity correlate with UC inflammation.ConclusionsNOX1 deficiency plus TNFα stimulation contribute to colitis through dysregulation of the stem cell niche and altered cell differentiation, enhancing basal lymphoplasmacytosis. Our findings prioritise ROS modulation for future therapies.
| S-EPMC9998338 | biostudies-literature
Project description:This SuperSeries is composed of the SubSeries listed below.
2022-12-27 | GSE202778 | GEO
Project description:Objective: Children with very early onset inflammatory bowel disease (VEO IBD) present with more extensive, severe, and refractory disease than older children and adults with IBD. In the current study, we evaluated functional and transcriptomic differences in epithelial cells from patients with VEO and older onset IBD compared to controls. Design: We established enteroids and colonoid lines from patients with VEO and older onset IBD and control patients. We evaluated crypt conversion (initial growth efficiency) compared to histopathological and clinical parameters. We performed RNA-sequencing on colonoids followed by validation via qPCR and flow cytometry in additional patients and in colonoids after multiple passages. Results: Control enteroids and colonoids exhibited consistently high crypt conversion, whereas patients with VEO and older onset IBD exhibited decreased crypt conversion associated with higher inflammation scores. Transcriptomic analysis revealed increased expression of LYZ, reported previously in colonoids from adult patients with ulcerative colitis, as well as antigen presentation genes HLA-DRB1 and HLA-DRA, which persisted after prolonged passaging as verified by flow cytometry. Conclusion: We present the first functional comparison of enteroids and colonoids from patients with VEO and older onset IBD, a subset of which exhibit poor initial growth. Enhanced and persistent expression of epithelial antigen presentation genes in patient colonoids supports the notion that epithelial cell-intrinsic differences may result from or contribute to disease. Analyses of colonoids from pediatric patients with IBD will contribute to a greater understanding of epithelial cell-autonomous defects in patients with VEO and older onset IBD and will be an important tool for understanding novel disease variants in the future.
2021-01-27 | GSE135170 | GEO
Project description:NOX1 is a catalytic subunit of nonphagocytic NADPH oxidase, mainly localized to smooth muscle cells in the vasculature. We investigated the pathology underlying the pulmonary arterial hypertension-like phenotype demonstrated in mice deficient in the Nox1 gene (Nox1-KO). Spontaneous enlargement and hypertrophy of the right ventricle, accompanied by hypertrophy of pulmonary vessels, were demonstrated in Nox1-KO at 9-18 weeks of age. Since an increased number of α-smooth muscle actin-positive vessels was observed in Nox1-KO, pulmonary arterial smooth muscle cells (PASMCs) were isolated and characterized by flow cytometry and TUNEL staining. In Nox1-/Y PASMC, the number of apoptotic cells was significantly reduced without any change in the expression of endothelin-1, and hypoxia-inducible factors HIF-1a and HIF-2a, factors implicated in the pathogenesis of PAH. Transcriptional profiling of mouse pulmonary arterial smooth muscle cells in wild-type and NOX1-KO was analyzed.
2014-01-22 | GSE42014 | GEO
Project description:NOX1 is a catalytic subunit of nonphagocytic NADPH oxidase, mainly localized to smooth muscle cells in the vasculature. We investigated the pathology underlying the pulmonary arterial hypertension-like phenotype demonstrated in mice deficient in the Nox1 gene (Nox1-KO). Spontaneous enlargement and hypertrophy of the right ventricle, accompanied by hypertrophy of pulmonary vessels, were demonstrated in Nox1-KO at 9-18 weeks of age. Since an increased number of α-smooth muscle actin-positive vessels was observed in Nox1-KO, pulmonary arterial smooth muscle cells (PASMCs) were isolated and characterized by flow cytometry and TUNEL staining. In Nox1-/Y PASMC, the number of apoptotic cells was significantly reduced without any change in the expression of endothelin-1, and hypoxia-inducible factors HIF-1a and HIF-2a, factors implicated in the pathogenesis of PAH. microRNA expression profiling of mouse pulmonary arterial smooth muscle cells in wild-type and NOX1-KO was analyzed.
2014-01-22 | GSE42015 | GEO
Project description:NOX1 gene is member of the NADPH-dependent superoxide producing enzyme family. It generates reactive oxygen species (ROS) in regulated manner in response to growth factors, cytokines and calcium signal. Low levels of ROS play role in many processes including cell proliferation, inflammatory response and mitogenesis. NOX1 over-expression in colon cancer cell lines as well as surgical samples suggests a role in colon cancer. We identified unique target sequences of siRNAs for post-transcriptional silencing of NOX1. Gene specific and scrambled (control) sequence carrying U6 promoter/shRNA cassettes were cloned into GFP expression vector. Stable clones were selected based on NOX1 expression after transient transfection of HT-29 cells. Clone 6A and 6C showed 70-80% decrease in NOX1 expression. The cells were expanded and analyzed further. We measured decreased ROS production, cell proliferation and G1/S block of the cell cycle. HT-29 parental cells, clone SA (scrambled) and clone 6A (gene specific) were utilized to establish xenografts in athymic mice to investigate the effect of NOX1 silencing on tumor growth and gene expression in vivo. Significant decrease was measured in the volume of forming tumors. The stable clones and corresponding xenografts were analyzed on microarray. The microarray data was validated with real-time PCR and western-blot analysis demonstrating the inhibition of genes important in cell cycle regulation and angiogenesis. The results of this study show silencing NOX1 levels of generated ROS decreased, the tumor formation attenuated in vivo suggesting NOX1 may be a therapeutic target for colon cancer. Experiment Overall Design: We have found that NOX1 over-expression in colon cancer cell lines as well as surgical samples suggests a role in colon cancer. We identified unique target sequences of siRNAs for post-transcriptional silencing of NOX1. Gene specific and scrambled (control) sequences carrying the U6 promoter/shRNA cassettes were cloned into a GFP expression vector. Stable clones were selected based on NOX1 expression after transient transfection of HT-29 cells. HT-29 parental cells, clone SA (scrambled) and clone 6A (gene specific) were utilized to establish xenografts in athymic mice to investigate the effect of NOX1 silencing on tumor growth and gene expression in vivo. A significant decrease was measured in the volume of tumors formed. The stable clones and corresponding xenografts were analyzed on microarray. The microarray data was validated with real-time PCR and western-blot analysis demonstrating the inhibition of genes important in cell cycle regulation and angiogenesis. The results of this study show silencing NOX1 levels of generated ROS decreased, the tumor formation attenuated in vivo suggesting NOX1 may be a therapeutic target for colon cancer.
2008-06-13 | E-GEOD-4561 | biostudies-arrayexpress
Project description:NOX1 gene is member of the NADPH-dependent superoxide producing enzyme family. It generates reactive oxygen species (ROS) in regulated manner in response to growth factors, cytokines and calcium signal. Low levels of ROS play role in many processes including cell proliferation, inflammatory response and mitogenesis. NOX1 over-expression in colon cancer cell lines as well as surgical samples suggests a role in colon cancer. We identified unique target sequences of siRNAs for post-transcriptional silencing of NOX1. Gene specific and scrambled (control) sequence carrying U6 promoter/shRNA cassettes were cloned into GFP expression vector. Stable clones were selected based on NOX1 expression after transient transfection of HT-29 cells. Clone 6A and 6C showed 70-80% decrease in NOX1 expression. The cells were expanded and analyzed further. We measured decreased ROS production, cell proliferation and G1/S block of the cell cycle. HT-29 parental cells, clone SA (scrambled) and clone 6A (gene specific) were utilized to establish xenografts in athymic mice to investigate the effect of NOX1 silencing on tumor growth and gene expression in vivo. Significant decrease was measured in the volume of forming tumors. The stable clones and corresponding xenografts were analyzed on microarray. The microarray data was validated with real-time PCR and western-blot analysis demonstrating the inhibition of genes important in cell cycle regulation and angiogenesis. The results of this study show silencing NOX1 levels of generated ROS decreased, the tumor formation attenuated in vivo suggesting NOX1 may be a therapeutic target for colon cancer. Keywords: gene silencing with shRNA
2007-03-27 | GSE4561 | GEO
Project description:The Sordaria macrospora nox1 mutant has a block in sexual development at the stage of protoperithecia formation, and therefore is sterile. The aim of this study was to determine the transcriptome of microdissected protoperithecia from the mutant, as well as the transcriptomes of total RNA from the mutant and the wild type for comparison. The data were then compared with transcriptome data from protoperithecia of the wild type and the developemental mutant pro1; the corresponding data were generated in a previous study (Teichert et al. 2012, BMC Genomics 13: 511, GEO accession GSE33668). The samples (amplified RNA from nox1 microdissected protoperithecia and total RNA from nox1 and wild type mycelia undergoing sexual development) were sequenced as paired-end reads on an Illumina HiSeq 2000, two independent biological replicates for each nox1 sample and one replicate for the wild type.
2014-03-10 | E-GEOD-49363 | biostudies-arrayexpress
Project description:NOX1 is a catalytic subunit of nonphagocytic NADPH oxidase, mainly localized to smooth muscle cells in the vasculature. We investigated the pathology underlying the pulmonary arterial hypertension-like phenotype demonstrated in mice deficient in the Nox1 gene (Nox1-KO). Spontaneous enlargement and hypertrophy of the right ventricle, accompanied by hypertrophy of pulmonary vessels, were demonstrated in Nox1-KO at 9-18 weeks of age. Since an increased number of ?-smooth muscle actin-positive vessels was observed in Nox1-KO, pulmonary arterial smooth muscle cells (PASMCs) were isolated and characterized by flow cytometry and TUNEL staining. In Nox1-/Y PASMC, the number of apoptotic cells was significantly reduced without any change in the expression of endothelin-1, and hypoxia-inducible factors HIF-1a and HIF-2a, factors implicated in the pathogenesis of PAH. microRNA expression profiling of mouse pulmonary arterial smooth muscle cells in wild-type and NOX1-KO was analyzed. Pulmonary arterial smooth muscle cells were harvested form 3 mice.
2014-01-22 | E-GEOD-42015 | biostudies-arrayexpress