Context-specific roles of diphthamide deficiency in hepatocellular carcinogenesis
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE191192 | GEO | 2021/12/21
REPOSITORIES: GEO
Similar Datasets
Project description:We used RNA-seq to measure mRNA levels of livers and liver tumors from mice treated with or without the chemical carcinogen diethylnitrosamine (DEN) and fed CD or obesogenic WD, with the aim to explore how metabolism in hepatic tissues and tumors (where present) is affected by diet, carcinogen treatment and tumor development. We used the RNA-seq data for differential gene expression analysis, and for the reconstruction and constraining of genome-scale metabolic models in order to estimate metabolic changes across tissues under the various treatment conditions.
2023-02-01 | GSE199899 | GEO
Project description:Background and Aims: The chemical carcinogen diethylnitrosamine (DEN) is often used to induce HCC in mice. Curiously, several labs have reported that the removal of oncoproteins from hepatocytes exacerbated DEN induced HCC, with mechanisms unknown. This study aimed at deciphering molecular mechanisms underlying the tumor suppressive effect of oncoproteins. Approach and Results: We generated mutant mouse lines with hepatocyte-specific deletions of Met, Ptpn11/Shp2, Ikkβ, or ctnnb1/β-catenin and assessed DEN-induced tumorigenesis in the wild-type and mutant mice. To systematically examine genetic and molecular signaling alternations, we performed whole exome and RNA-sequencing on liver samples collected at the pre-cancer and established cancer stages. Although the mutational profiles of DEN-induced tumors were barely different in wild-type and mutant mice, oncoprotein ablation increased DEN-induced mutational burdens, especially in Shp2-deficient tumors. RNA-sequencing revealed multiple changes in signaling pathways, in particular, upregulated epithelial-mesenchymal transition, cell migration, and tumor metastasis, as well as downregulated small molecule metabolism that was affected by oncoprotein ablation. We identified key molecules and pathways that are associated with hepatic innate immunity and implicated in liver tumorigenesis. In addition, we unveiled markedly changed expression of a few miRNAs in the human HCC database. Conclusions: The aggravation of DEN-induced HCC progression seen on oncoprotein ablation could be caused by common and distinct genomic and signaling alterations. This study reveals a new level of complexity in hepatocarcinogenesis and elucidates molecular mechanisms underlying tumor evolution and recurrence.
2024-08-13 | GSE246914 | GEO
Project description:The aim of this study was to better understand the Bid-regulated events during hepatic carcinogenesis. The information from this set of data indicates that wild type and bid-deficient livers express different sets of genes after diethylnitrosamine (DEN) treatment.
2016-09-01 | GSE80488 | GEO
Project description:The expression of NRF2 was activated in human hepatocellular carcinoma. In current study, we observed that in hepatic carcinogen diethylnitrosamine induced liver tumor mouse model, NRF2 knockout mouse developed less liver tumor incidence than wild type mouse. To reveal the detailed mechanism, RNA-seq experiment was conducted to compare gene transcriptome profiles of NRF2 WT and KO mice during HCC progression.
2021-09-15 | GSE183712 | GEO
Project description:Background and Aims: Telomere dysfunction can increase tumor initiation by induction of chromosomal instability, but initiated tumor cells need to reactivate telomerase for genome stabilization and tumor progression. However, this concept has not been proven in vivo since appropriate mouse models were lacking. Here, we analyzed hepatocarcinogenesis (i) in a novel mouse model of inducible telomere dysfunction on a telomerase-proficient background, (ii) in telomerase knockout mice with chronic telomere dysfunction (G3 mTerc-/-), and (iii) in wild-type mice with functional telomeres and telomerase. Transient or chronic telomere dysfunction enhanced the rates of chromosomal aberrations during hepatocarcinogenesis, but only telomerase-proficient mice exhibited significantly increased rates of macroscopic tumor formation and cancer cell proliferation in response to telomere dysfunction. In contrast, telomere dysfunction resulted in pronounced accumulation of DNA damage, cell cycle arrest and apoptosis in telomerase-deficient liver tumors. Together, these data provide the first in vivo evidence that transient telomere dysfunction during early and late stages of tumorigenesis can promote chromosomal instability and carcinogenesis in telomerase-proficient mice in the absence of additional genetic checkpoint defects at germline level. RNA from liver tumors derived from from DEN treated TTD+ mice TTD- mice and RNA from normal liver 48h-72h after doxycycline induced transient telomere dysfunction in TTD+ and TTD- liver were isolated and RNA was extracted. Agilent Mouse 4x44K v2 arrays were used. DNA from liver tumors and corrresponding kidney as control derived from from DEN treated TTD+ mice, TTD- mice and mTERC-/- G3 mice was isolated and extracted using Phenol/Chloroform. Agilent Mouse 4x44K and Mouse 1x244K arrays were used.
2012-03-30 | E-GEOD-36813 | biostudies-arrayexpress
Project description:We performed microarray analysis to assess changes in gene expression in dysplastic lesions in the mouse oesophagus versus adjacent normal epithelium. To induce tumor formation, animals were treated with the tobacco-derived carcinogen DEN (diethylnitrosamine) in drinking water 3 times a week for 56 days. Subsequently, Sorafenib was administered by ip injection as a solution at 10 mg/ml for 28 days. RNA was isolated from 9 HGD (high grade dysplasia) samples and 9 control samples of adjacent normal epithelium from the same animal (n= 9 samples from a total of 6 animals). Hybridisation was performed on a Mouse Whole Genome-6 v2 Illumina array.
2016-07-06 | E-MTAB-4244 | biostudies-arrayexpress
Project description:Liver carcinogenesis induced by DEN closely mimics the pathologies observed during human liver tumor initiation and progression. DEN treatment triggered c-Jun expression lasting up to at least 1 week in mouse livers as measured by Western blots and immunohistochemical staining. DEN-induced liver tumorigenesis was also dramatically reduced in Alfp-cre+/c-jun f/f mice, in which c-Jun is constitutively deleted in hepatocytes around birth. These data unambiguously demonstrate that c-Jun is specifically required during liver cancer initiation. We searched for cell death effectors downstream of c-Jun operating in cancer initiation. Expression profiling revealed that several cell death-associated genes were deregulated by comparing Alfp-cre+/c-junf/f and Alfp-cre-/c-jun f/f livers. Mouse livers were collected before and 48hours after diethylnitrosamine treament (100mg/kg body weight). Whole genome expression profiles were analyzed using total RNAs extracted from the whole liver samples. By comparison of the gene expression profiles of these samples, genes with significantly altered expression levels will be selected and further characterized for their roles in DEN-induce liver cell death in tumor initiation.
2012-08-07 | E-GEOD-39930 | biostudies-arrayexpress
Project description:Liver carcinogenesis induced by DEN closely mimics the pathologies observed during human liver tumor initiation and progression. DEN treatment triggered c-Jun expression lasting up to at least 1 week in mouse livers as measured by Western blots and immunohistochemical staining. DEN-induced liver tumorigenesis was also dramatically reduced in Alfp-cre+/c-jun f/f mice, in which c-Jun is constitutively deleted in hepatocytes around birth. These data unambiguously demonstrate that c-Jun is specifically required during liver cancer initiation. We searched for cell death effectors downstream of c-Jun operating in cancer initiation. Expression profiling revealed that several cell death-associated genes were deregulated by comparing Alfp-cre+/c-junf/f and Alfp-cre-/c-jun f/f livers. Mouse livers were collected before and 48hours after diethylnitrosamine treament (100mg/kg body weight). Whole genome expression profiles were analyzed using total RNAs extracted from the whole liver samples. By comparison of the gene expression profiles of these samples, genes with significantly altered expression levels will be selected and further characterized for their roles in DEN-induce liver cell death in tumor initiation.
2012-08-07 | E-GEOD-39929 | biostudies-arrayexpress
Project description:Liver carcinogenesis induced by DEN closely mimics the pathologies observed during human liver tumor initiation and progression. DEN treatment triggered c-Jun expression lasting up to at least 1 week in mouse livers as measured by Western blots and immunohistochemical staining. DEN-induced liver tumorigenesis was also dramatically reduced in Alfp-cre+/c-jun f/f mice, in which c-Jun is constitutively deleted in hepatocytes around birth. These data unambiguously demonstrate that c-Jun is specifically required during liver cancer initiation. We searched for cell death effectors downstream of c-Jun operating in cancer initiation. Expression profiling revealed that several cell death-associated genes were deregulated by comparing Alfp-cre+/c-junf/f and Alfp-cre-/c-jun f/f livers. Mouse livers were collected before and 48hours after diethylnitrosamine treament (100mg/kg body weight). Whole genome expression profiles were analyzed using total RNAs extracted from the whole liver samples. By comparison of the gene expression profiles of these samples, genes with significantly altered expression levels will be selected and further characterized for their roles in DEN-induce liver cell death in tumor initiation.
2012-08-07 | E-GEOD-39931 | biostudies-arrayexpress
Project description:Liver carcinogenesis induced by DEN closely mimics the pathologies observed during human liver tumor initiation and progression. DEN treatment triggered c-Jun expression lasting up to at least 1 week in mouse livers as measured by Western blots and immunohistochemical staining. DEN-induced liver tumorigenesis was also dramatically reduced in Alfp-cre+/c-jun f/f mice, in which c-Jun is constitutively deleted in hepatocytes around birth. These data unambiguously demonstrate that c-Jun is specifically required during liver cancer initiation. We searched for cell death effectors downstream of c-Jun operating in cancer initiation. Expression profiling revealed that several cell death-associated genes were deregulated by comparing Alfp-cre+/c-junf/f and Alfp-cre-/c-jun f/f livers. Mouse livers were collected before and 48hours after diethylnitrosamine treament (100mg/kg body weight). Whole genome expression profiles were analyzed using total RNAs extracted from the whole liver samples. By comparison of the gene expression profiles of these samples, genes with significantly altered expression levels will be selected and further characterized for their roles in DEN-induce liver cell death in tumor initiation.
2012-08-07 | E-GEOD-39928 | biostudies-arrayexpress