P53 status and AAI gene expression response
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE10359 | GEO | 2008/07/28
SECONDARY ACCESSION(S): PRJNA105617
REPOSITORIES: GEO
Similar Datasets
Project description:Human colon carcinoma cells (HCT116) differing in p53 status were exposed to benzo(a)pyrene (BaP) (2.5 and 5 uM for up to 48 h) or anti-benzo(a)pyrene-trans-7,8-dihydrodiol-9,10-epoxide (BPDE)(0.5 and 1 uM for up to 24 h), and their gene expression responses compared by cDNA microarray technology. Keywords: BaP or BPDE exposure
2007-11-13 | GSE9547 | GEO
Project description:Aristolochic acid (AA) is the causative agent of urothelial tumours associated with aristolochic acid nephropathy and is also implicated in the development of Balkan endemic nephropathy-associated urothelial tumours. These tumours contain AA-characteristic TP53 mutations. We examined gene expression changes in Hupki (human TP53 knock-in) mice after treatment with aristolochic acid I (AAI) by gavage (5 mg/kg body weight). After 3, 12 and 21 days of treatment gene expression profiles were investigated using Agilent Whole Mouse 44K Genome Oligo Array. Expression profiles were significantly altered by AAI treatment in both target (kidney) and non-target (liver) tissue. Renal pathology and DNA adduct analysis confirmed kidney as the target tissue of AAI-induced toxicity. Gene ontology for functional analysis revealed that processes related to apoptosis, cell cycle, stress response, immune system, inflammatory response and kidney development were altered in kidney. Canonical pathway analysis indicated Nfkb, aryl hydrocarbon receptor, Tp53 and cell cycle signalling as the most important pathways modulated in kidney. Expression of Nfkb1 and other Nfkb-target genes was confirmed by quantitative real-time PCR (qRT-PCR) and was consistent with the induction of Nfkb1 protein. Myc oncogene, frequently over-expressed in urothelial tumours, was up-regulated by AAI on the microarrays and confirmed by qRT-PCR and protein induction. Collectively we found that microarray gene expression analysis is a useful tool to define tissue-specific responses in AAI-induced toxicity. Several genes identified such as TP53, Rb1, Mdm2, Cdkn2a and Myc are frequently affected in human urothelial cancer, and may be valuable prognostic markers in future clinical studies. Keywords: Carcinogen treatment Two-color Agilent array. A reference design was chosen that all samples were hybridised to universal mouse reference RNA (UMRR). 12-condition experiment (2 mouse organs: kidney and liver; 2 treatments: AAI and water; 3 time points: 3, 12 and 21 days). Three biological replicates for each condition. One replicate per array.
2010-06-08 | E-GEOD-18246 | biostudies-arrayexpress
Project description:Aristolochic acid (AA) is the causative agent of urothelial tumours associated with aristolochic acid nephropathy and is also implicated in the development of Balkan endemic nephropathy-associated urothelial tumours. These tumours contain AA-characteristic TP53 mutations. We examined gene expression changes in Hupki (human TP53 knock-in) mice after treatment with aristolochic acid I (AAI) by gavage (5 mg/kg body weight). After 3, 12 and 21 days of treatment gene expression profiles were investigated using Agilent Whole Mouse 44K Genome Oligo Array. Expression profiles were significantly altered by AAI treatment in both target (kidney) and non-target (liver) tissue. Renal pathology and DNA adduct analysis confirmed kidney as the target tissue of AAI-induced toxicity. Gene ontology for functional analysis revealed that processes related to apoptosis, cell cycle, stress response, immune system, inflammatory response and kidney development were altered in kidney. Canonical pathway analysis indicated Nfkb, aryl hydrocarbon receptor, Tp53 and cell cycle signalling as the most important pathways modulated in kidney. Expression of Nfkb1 and other Nfkb-target genes was confirmed by quantitative real-time PCR (qRT-PCR) and was consistent with the induction of Nfkb1 protein. Myc oncogene, frequently over-expressed in urothelial tumours, was up-regulated by AAI on the microarrays and confirmed by qRT-PCR and protein induction. Collectively we found that microarray gene expression analysis is a useful tool to define tissue-specific responses in AAI-induced toxicity. Several genes identified such as TP53, Rb1, Mdm2, Cdkn2a and Myc are frequently affected in human urothelial cancer, and may be valuable prognostic markers in future clinical studies. Keywords: Carcinogen treatment
2010-06-09 | GSE18246 | GEO
Project description:Exposure to aristolochic acid (AA) is linked to kidney disease and urothelial cancer in humans. The major carcinogenic component of the AA plant extract is aristolochic acid I (AAI). The transcription factor p53 acts as a tumour suppressor and is frequently mutated in AA-induced tumours. Using a mouse model, we previously showed that Trp53 genotype impacts on AAI-induced nephrotoxicity in vivo (i.e. p53 protects from AAI-induced renal proximal tubular injury), but the underlying mechanism(s) involved remain to be further explored. In the present study, we investigated the impact of p53 on AAI-induced gene expression in vivo by treating Trp53(+/+), Trp53(+/-) and Trp53(-/-) mice with 3.5 mg/kg body weight (bw) AAI daily for 6 days. The Clariom™ S Assay microarray was used to elucidate gene expression profiles in mouse kidneys after AAI treatment in order to identify potential mechanisms by which AAI drives renal injury in Trp53(-/-) kidneys. Principle component analysis and hierarchical clustering in Qlucore Omics Explorer showed that gene expression in AAI-exposed Trp53(+/+), Trp53(+/-) and Trp53(-/-) kidneys is treatment-dependent. However, gene expression profiles did not segregate in a clear-cut manner according to Trp53 genotype, hence further investigations were performed by pathway analysis with MetaCore™. Several pathways, such as those related to epithelial-to-mesenchymal transition, transcription of hypoxia-inducible factor 1 targets, renal injury and secretion of xenobiotics were significantly altered to varying degrees for AAI-exposed kidneys. The top ten up-regulated genes included cyclin-dependent kinase inhibitor 1a (Cdkn1a), a mediator of cell cycle arrest; and neutrophil gelatinase-associated lipocalin (Ngal), which has been shown to play a role in nephritis by promoting inflammation and apoptosis. Members of the solute carrier (Slc) family (i.e. Slc22a2, Slc22a6, Slc22a7, Slc22a8) were amongst the top ten down-regulated genes. Pathway analysis also identified genes that are uniquely affected by AAI treatment in Trp53(+/+), Trp53(+/-) and Trp53(-/-) kidneys. Apoptotic pathways were modulated in Trp53(+/+) kidneys; whereas oncogenic and pro-survival pathways were significantly altered for Trp53(+/-) and Trp53(-/-) kidneys, respectively. Microarray gene expression analysis identified significant toxicogenomic responses to AAI that give novel insights into its mechanism of nephrotoxicity. Alterations of biological processes by AAI in Trp53(+/+), Trp53(+/-) and Trp53(-/-) kidneys could explain the mechanisms by which p53 protects from or p53 loss drives AAI-induced renal injury in vivo.
2019-12-02 | GSE136276 | GEO
Project description:In the present study, goal was to scan the potential biomarker for acute kidney injury induced by aristolochic acid I (AAI).We utilized the microarry analysis to investigate the microRNA (miRNA) expression profile in kidneys from rat treated by 40mg/kg AA I for 2-6 days. miRNAs with significantly different expression of global miRNA expression profile were validated by qRT-PCR. For miRNAs still significantly disregulation, we further examined the expression in plasma of rats treated with AAI dosed at 10, 20 and 40mg/kg AAI for 2-6 days by qRT-PCR. miRNAs with significantly dysregulation in plasma, their expression in brain, liver and heart was examined for kicking out the non-specific disregulation in AAI induced acute kidney injury, so that the significant dysregulation miRNAs with specificity in kidney and plasma was found as potential biomarkers for AAI induced acute kidney injury. Five control and 15 kidneys treated with 40mg/kg AAI on day 2, 4 and 6 was examined by microarray.
2016-03-10 | E-GEOD-79063 | biostudies-arrayexpress
Project description:Activation of the p53 network plays a central role in the inflammatory stress response associated with ulcerative colitis, and may modulate cancer risk in patients afflicted with this chronic disease. The overall goal of these experiments is to study the gene expression profiles associated with four microenvironmental components of the inflammatory response (NO*, DNA damage, DNA replication arrest, and hypoxia) that result in p53 stabilization and activation. To this end, isogenic HCT116 and HCT116 TP53-/- colon cancer cells were exposed to the NO*-donor Sper/NO, H2O2 (DNA damage), hypoxia, or hydroxyurea (HU, DNA replication arrest), and their mRNA was analyzed using oligonucleotide microarrays. Keywords: time series design
2005-12-01 | GSE3176 | GEO
Project description:5-Fluorouracil (5-FU) is one of the most common drugs used in chemotherapy because of its efficacy and stability. However, 5-FU has been known to work on only 10~15% of colon cancer patients. Therefore, the study of 5-FU sensitivity study is necessary to increase the survival of colon cancer patients. p53 is one of the factors that effect on drug sensitivity. Main function of p53 has been focused on transcription activity in cell death. Numerous drug related studies show that expression of wild-type p53 increases drug sensitivity in various cancer types through inducing apoptotic signaling pathways. Currently, it has been reported that p53 has both transcriptional and non-transcriptional activities in apoptosis. However, most studies about p53 non-transcriptional activities in apoptosis are mainly focused on p53 induced mitochondrial outer membrane permeabilization, triggering the release of pro-apoptotic factors. The chromatin structure and organization have strongly attracted because of their impacts in cellular phenotypes. Recent studies have been shown that changes in chromatin accessibility affect cell phenotypes for external stimuli. Since p53 plays an important role in drug sensitivity and 5-FU is an external stimulus for cancer cells, we hypothesized that p53 may effect on 5-FU sensitivity through different regulation of chromatin accessible regions between TP53-WT and TP53-KO cells. To determine the effect of p53 on chromatin accessibility modification associated with 5-FU sensitivity, ATAC-seq and RNA-seq were performed under 5-FU treatment on TP53-WT as drug sensitive and TP53-KO as drug resistant HCT116 cells. In this study, we found that 5-FU induces chromatin accessibility in both TP53-WT and TP53-KO cells. Moreover, our results show that 5-FU induced chromatin accessibility increases expression of apoptotic genes in TP53-WT HCT116 cells through p53 non-transcriptional activity in nucleus.
2021-02-10 | GSE157950 | GEO
Project description:5-Fluorouracil (5-FU) is one of the most common drugs used in chemotherapy because of its efficacy and stability. However, 5-FU has been known to work on only 10~15% of colon cancer patients. Therefore, the study of 5-FU sensitivity study is necessary to increase the survival of colon cancer patients. p53 is one of the factors that effect on drug sensitivity. Main function of p53 has been focused on transcription activity in cell death. Numerous drug related studies show that expression of wild-type p53 increases drug sensitivity in various cancer types through inducing apoptotic signaling pathways. Currently, it has been reported that p53 has both transcriptional and non-transcriptional activities in apoptosis. However, most studies about p53 non-transcriptional activities in apoptosis are mainly focused on p53 induced mitochondrial outer membrane permeabilization, triggering the release of pro-apoptotic factors. The chromatin structure and organization have strongly attracted because of their impacts in cellular phenotypes. Recent studies have been shown that changes in chromatin accessibility affect cell phenotypes for external stimuli. Since p53 plays an important role in drug sensitivity and 5-FU is an external stimulus for cancer cells, we hypothesized that p53 may effect on 5-FU sensitivity through different regulation of chromatin accessible regions between TP53-WT and TP53-KO cells. To determine the effect of p53 on chromatin accessibility modification associated with 5-FU sensitivity, ATAC-seq and RNA-seq were performed under 5-FU treatment on TP53-WT as drug sensitive and TP53-KO as drug resistant HCT116 cells. In this study, we found that 5-FU induces chromatin accessibility in both TP53-WT and TP53-KO cells. Moreover, our results show that 5-FU induced chromatin accessibility increases expression of apoptotic genes in TP53-WT HCT116 cells through p53 non-transcriptional activity in nucleus.
2021-02-10 | GSE157949 | GEO
Project description:In the present study, goal was to scan the potential biomarker for acute kidney injury induced by aristolochic acid I (AAI).We utilized the microarry analysis to investigate the microRNA (miRNA) expression profile in kidneys from rat treated by 40mg/kg AA I for 2-6 days. miRNAs with significantly different expression of global miRNA expression profile were validated by qRT-PCR. For miRNAs still significantly disregulation, we further examined the expression in plasma of rats treated with AAI dosed at 10, 20 and 40mg/kg AAI for 2-6 days by qRT-PCR. miRNAs with significantly dysregulation in plasma, their expression in brain, liver and heart was examined for kicking out the non-specific disregulation in AAI induced acute kidney injury, so that the significant dysregulation miRNAs with specificity in kidney and plasma was found as potential biomarkers for AAI induced acute kidney injury.
2016-03-10 | GSE79063 | GEO
Project description:Activation of the p53 network plays a central role in the inflammatory stress response associated with ulcerative colitis, and may modulate cancer risk in patients afflicted with this chronic disease. The overall goal of these experiments is to study the gene expression profiles associated with four microenvironmental components of the inflammatory response (NO*, DNA damage, DNA replication arrest, and hypoxia) that result in p53 stabilization and activation. To this end, isogenic HCT116 and HCT116 TP53-/- colon cancer cells were exposed to the NO*-donor Sper/NO, H2O2 (DNA damage), hypoxia, or hydroxyurea (HU, DNA replication arrest), and their mRNA was analyzed using oligonucleotide microarrays. Cy3-labeled reference probes (untreated) and Cy5-labeled probes (samples exposed for the indicated times) were hybridized to 70-mer oligonucleotide microarrays with 21,329 probes (Qiagen Human Array-Ready Oligo Set, Version 2.0). The arrays were printed by the Advanced Technology Center at the National Cancer Institute. At least two hybridizations (range 2-5) were performed for each sample.
2005-11-30 | E-GEOD-3176 | biostudies-arrayexpress