Hepatic reductase null
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE1468 | GEO | 2004/07/11
SECONDARY ACCESSION(S): PRJNA90049
REPOSITORIES: GEO
Similar Datasets
Project description:Microarray analysis to examine the relationship between hepatic phenotype and changes in gene expression in cytochrome P450 reductase (CPR) null mice.
2008-06-11 | E-GEOD-1468 | biostudies-arrayexpress
Project description:NADPH-cytochrome P450 reductase (CPR) is important for the functions of many enzymes, such as microsomal cytochrome P450 (P450) monooxygenases and heme oxygenases. Two mouse models with deficient CPR expression in adults were recently generated in this laboratory: liver-Cpr-null (with liver-specific Cpr deletion) (Gu et al., J. Biol. Chem., 278, 25895–25901, 2003) and Cpr-low (with reduced CPR expression in all organs examined) (Wu et al. J. Pharmacol. Expt. Ther. 312, 35-43, 2005). The phenotypes included a reduced serum cholesterol level and an induction of hepatic P450 in both models, and hepatomegaly and fatty liver in the liver-Cpr-null mouse alone. Our aim was to identify hepatic gene-expression changes related to these phenotypes. Cpr-lox mice, which have normal CPR expression (Wu et al., Genesis, 36, 177-181, 2003.), were used as the control in microarray analysis. A detailed analysis of the gene-expression changes in lipid metabolism and transport pathways revealed potential mechanisms, such as an increased activation of constitutive androstane receptor (CAR) and a decreased activation of peroxisomal proliferators activated receptor alpha (PPAR-gamma) by precursors of cholesterol biosynthesis, that underlie common changes (e.g., induction of multiple P450s and inhibition of genes for fatty acids metabolism) in response to CPR-loss in the two mouse models. Moreover, we also uncovered model-specific gene-expression changes, such as the induction of a lipid translocase (CD36 antigen) and the suppression of carnitine O-palmitoyltransferase 1 (CPT1a) and acyl-CoA synthetase long-chain family member 1 (Acsl1), that are potentially responsible for the severe hepatic lipidosis observed in liver-Cpr-null, but not Cpr-low mice. Keywords = Cytochrome P450 Keywords = NADPH-cytochrome P450 reductase Keywords = transgenic mice Keywords = liver Keywords = nuclear receptor Keywords: other
2005-07-16 | GSE2362 | GEO
Project description:NADPH-cytochrome P450 reductase (CPR) is important for the functions of many enzymes, such as microsomal cytochrome P450 (P450) monooxygenases and heme oxygenases. Two mouse models with deficient CPR expression in adults were recently generated in this laboratory: liver-Cpr-null (with liver-specific Cpr deletion) (Gu et al., J. Biol. Chem., 278, 25895-25901, 2003) and Cpr-low (with reduced CPR expression in all organs examined) (Wu et al. J. Pharmacol. Expt. Ther. 312, 35-43, 2005). The phenotypes included a reduced serum cholesterol level and an induction of hepatic P450 in both models, and hepatomegaly and fatty liver in the liver-Cpr-null mouse alone. Our aim was to identify hepatic gene-expression changes related to these phenotypes. Cpr-lox mice, which have normal CPR expression (Wu et al., Genesis, 36, 177-181, 2003.), were used as the control in microarray analysis. A detailed analysis of the gene-expression changes in lipid metabolism and transport pathways revealed potential mechanisms, such as an increased activation of constitutive androstane receptor (CAR) and a decreased activation of peroxisomal proliferators activated receptor alpha (PPARï?¡) by precursors of cholesterol biosynthesis, that underlie common changes (e.g., induction of multiple P450s and inhibition of genes for fatty acids metabolism) in response to CPR-loss in the two mouse models. Moreover, we also uncovered model-specific gene-expression changes, such as the induction of a lipid translocase (CD36 antigen) and the suppression of carnitine O-palmitoyltransferase 1 (CPT1a) and acyl-CoA synthetase long-chain family member 1 (Acsl1), that are potentially responsible for the severe hepatic lipidosis observed in liver-Cpr-null, but not Cpr-low mice.
2007-08-31 | E-GEOD-2362 | biostudies-arrayexpress
Project description:The NADPH-cytochrome P450 reductase (CPR) is essential for the functioning of microsomal cytochrome P450 (P450) monoxygenases. The biological functions of the CPR-dependent enzymes in the intestine are not known, despite the vast knowledge available on the biochemical properties of the various oxygenases. A mouse model with intestinal epithelium (IE)-specific Cpr-knockout (IE-Cpr-null) was recently generated in this laboratory (Zhang et al., Drug Metab. Dispos., 37, 651-657, 2009). The IE-Cpr-null mice did not display any obvious abnormalities in growth, development, or reproduction, and their intestines appeared to have a normal structure. Despite the absence of observable phenotypes, we hypothesized that loss of the enterocyte CPR expression will impact homeostasis of endogenous compounds, and expression of genes, that have critical biological function in the small intestine. In the present study, we have performed genomic analyses for enterocytes from IE-Cpr-null mice and their wild-type littermates, using Affymetrix Mouse Expression Set 430A 2.0 GeneChip Arrays. Our aim was to identify small intestinal gene-expression changes, which may shed light on potential biological roles of CPR and CPR-dependent enzymes in the small intestine. Our analysis revealed significant expression increases in P450s, transporters, cholesterol biosynthesis, and (unexpectedly) antigen presentation/processing. Further genomic and biochemical analyses revealed potential mechanisms linking CPR-dependent enzymes and the expression of major histocompatibility complex class II genes in the small intestine.
2012-04-11 | GSE35293 | GEO
Project description:The NADPH-cytochrome P450 reductase (CPR) is essential for the functioning of microsomal cytochrome P450 (P450) monoxygenases. The biological functions of the CPR-dependent enzymes in the intestine are not known, despite the vast knowledge available on the biochemical properties of the various oxygenases. A mouse model with intestinal epithelium (IE)-specific Cpr-knockout (IE-Cpr-null) was recently generated in this laboratory (Zhang et al., Drug Metab. Dispos., 37, 651-657, 2009). The IE-Cpr-null mice did not display any obvious abnormalities in growth, development, or reproduction, and their intestines appeared to have a normal structure. Despite the absence of observable phenotypes, we hypothesized that loss of the enterocyte CPR expression will impact homeostasis of endogenous compounds, and expression of genes, that have critical biological function in the small intestine. In the present study, we have performed genomic analyses for enterocytes from IE-Cpr-null mice and their wild-type littermates, using Affymetrix Mouse Expression Set 430A 2.0 GeneChip Arrays. Our aim was to identify small intestinal gene-expression changes, which may shed light on potential biological roles of CPR and CPR-dependent enzymes in the small intestine. Our analysis revealed significant expression increases in P450s, transporters, cholesterol biosynthesis, and (unexpectedly) antigen presentation/processing. Further genomic and biochemical analyses revealed potential mechanisms linking CPR-dependent enzymes and the expression of major histocompatibility complex class II genes in the small intestine. Adult (2.5-3.0 month-old) male IE-Cpr-null and WT litermates were used for all experiments. RNA was collected from eight mice of each genotype and RNA from two mice of the same genotype was pooled prior to hybridization to the microarray to create a total of four samples for each genotype.
2012-04-10 | E-GEOD-35293 | biostudies-arrayexpress
Project description:The cytochrome P450 limonene-6-hydroxylase (P450), cytochrome P450 reductase (CPR) and carveol dehydrogenase (CDH) were expressed in Escherichia coli for (−)-carvone production from (−)-limonene. The optimum ratio of enzyme expression to maximize (−)-carvone production was determined using the proteome analysis quantification concatamer (QconCAT) method.
2022-08-24 | PXD028077 | JPOST Repository
Project description:Microsomal cytochrome P450 (CYP450) reductase enzymes play a major role in drug and xenobiotic metabolism. Mice which are deficient in hepatic CYP450 reductase serve as excellent models in understanding CYP450 drug metabolism and alterations in the underlying biology. A reversed-phase nano-bore UPLC-MS-based proteomic analysis, using an untargeted data independent approach (DIA), has been utilized for liver tissue extracts to evaluate differences between the proteomes of wild type (C57Bl6) and hepatic P450 reductase mice (HRNTM). Statistically curated, differential expressed protein groups highlighted a variety of molecular and biological functions, including binding and catalytic related activities. Pathway enrichment analysis resulted in perturbation of lipid and energy related pathways, which included bile acid biosynthesis, fatty acid omega oxidation and tricarbonic acid (TCA) cycle as examples.
2022-05-26 | PXD024420 | Pride
Project description:Using mice deficient in hepatic cytochrome-P450 oxidoreductase (POR), which disables the liver cytochrome P450 system, the metabolism and biological response of the anti-carcinogenic flavonoid, quercetin, was examined. Profiling circulating metabolites revealed similar profiles over 72 h in wild type (WT) and POR-null (KO) mice, showing that hepatic P450 and reduced biliary secretion do not affect quercetin metabolism. Transcriptional profiling at 24 h revealed that 2-3 fold more genes responded significantly to quercetin in WT compared to KO in the jejunum, ileum, colon, and liver, suggesting that hepatic P450s mediate many of the biological effects of quercetin, such as immune function, estrogen receptor signaling and lipid, glutathione, purine, and amino acid metabolism, even though quercetin metabolism is not modified. The functional interpretation of expression data in response to quercetin (single dose of 7 mg/animal) revealed a molecular relationship between the liver and jejunum. In WT animals, amino acid and sterol metabolism were predominantly modulated in the liver, fatty acid metabolism response was shared between the liver and jejunum, and glutathione metabolism was modulated in the small intestine. In contrast, KO animals do not regulate amino acid metabolism in the liver or small intestine, they share the control of fatty acid metabolism between the liver and jejunum, and regulation of sterol metabolism is shifted from the liver to the jejunum and that of glutathione metabolism from the jejunum to the liver. This demonstrates that the quercetin-mediated regulation of these biological functions in extrahepatic tissues is dependent on the functionality of the liver POR. In conclusion, using a systems biology approach to explore the contribution of hepatic phase I detoxification on quercetin metabolism demonstrated the resiliency and adaptive capacity of a biological organism in dealing with a bioactive nutrient when faced with a tissue-specific molecular dysfunction. Experiment Overall Design: All animals were adapted to the RM3 (E) 801710 Soya-free powdered diet (B. S & S. [Scotland] Ltd, UK) over a period of 14 days. Quercetin was added separately to the semi-purified diets at a concentration of 6200 ppm (0.62 %; 6.2 g per kg). 65 male cytochrome P450 reductase null (KO) mice and 65 wild type (WT) C57BL/6 mice were reared, all aged between 6-8 weeks. Animals were housed 3 per cage, where both temperature and relative humidity were maintained within a range of 19-23oC and 40-70%, respectively. Twelve-hour periods of light were cycled with twelve-hour periods of darkness. Experiment Overall Design: For each strain of mouse, the following experimental design was used: a control group (25 mice) receiving powdered RM3 diet ad libitum and a group (25 mice) receiving a âhigh doseâ of quercetin (7 mg / mouse). The experimental diet was administered on day 15, following a 14-day adaptation period to the RM3 diet. Animals were sacrificed after 24 h. Experiment Overall Design: RNA samples destined for microarray analysis were only accepted and pooled into three groups if no aberrant signs of degradation (e.g. multiple peaks) were observed. The comprehensive gene expression profiles of the liver, jejunum, ileum, and colon were analyzed. In all cases, except those listed, RNA from 3 mice was pooled to form sample 1, another 3 mice to form sample 2, etc. Thus, 9 mice were used for the four experimental groups: wild-type, wild-type+quercetin, POR-null, POR-null+quercetin.
2008-06-13 | E-GEOD-4258 | biostudies-arrayexpress
Project description:Using mice deficient in hepatic cytochrome-P450 oxidoreductase (POR), which disables the liver cytochrome P450 system, the metabolism and biological response of the anti-carcinogenic flavonoid, quercetin, was examined. Profiling circulating metabolites revealed similar profiles over 72 h in wild type (WT) and POR-null (KO) mice, showing that hepatic P450 and reduced biliary secretion do not affect quercetin metabolism. Transcriptional profiling at 24 h revealed that 2-3 fold more genes responded significantly to quercetin in WT compared to KO in the jejunum, ileum, colon, and liver, suggesting that hepatic P450s mediate many of the biological effects of quercetin, such as immune function, estrogen receptor signaling and lipid, glutathione, purine, and amino acid metabolism, even though quercetin metabolism is not modified. The functional interpretation of expression data in response to quercetin (single dose of 7 mg/animal) revealed a molecular relationship between the liver and jejunum. In WT animals, amino acid and sterol metabolism were predominantly modulated in the liver, fatty acid metabolism response was shared between the liver and jejunum, and glutathione metabolism was modulated in the small intestine. In contrast, KO animals do not regulate amino acid metabolism in the liver or small intestine, they share the control of fatty acid metabolism between the liver and jejunum, and regulation of sterol metabolism is shifted from the liver to the jejunum and that of glutathione metabolism from the jejunum to the liver. This demonstrates that the quercetin-mediated regulation of these biological functions in extrahepatic tissues is dependent on the functionality of the liver POR. In conclusion, using a systems biology approach to explore the contribution of hepatic phase I detoxification on quercetin metabolism demonstrated the resiliency and adaptive capacity of a biological organism in dealing with a bioactive nutrient when faced with a tissue-specific molecular dysfunction. Experiment Overall Design: All animals were adapted to the RM3 (E) 801710 Soya-free powdered diet (B. S & S. [Scotland] Ltd, UK) over a period of 14 days. Quercetin was added separately to the semi-purified diets at a concentration of 6200 ppm (0.62 %; 6.2 g per kg). 65 male cytochrome P450 reductase null (KO) mice and 65 wild type (WT) C57BL/6 mice were reared, all aged between 6-8 weeks. Animals were housed 3 per cage, where both temperature and relative humidity were maintained within a range of 19-23oC and 40-70%, respectively. Twelve-hour periods of light were cycled with twelve-hour periods of darkness. Experiment Overall Design: For each strain of mouse, the following experimental design was used: a control group (25 mice) receiving powdered RM3 diet ad libitum and a group (25 mice) receiving a âhigh doseâ of quercetin (7 mg / mouse). The experimental diet was administered on day 15, following a 14-day adaptation period to the RM3 diet. Animals were sacrificed after 24 h. Experiment Overall Design: RNA samples destined for microarray analysis were only accepted and pooled into three groups if no aberrant signs of degradation (e.g. multiple peaks) were observed. The comprehensive gene expression profiles of the liver, jejunum, ileum, and colon were analyzed. In all cases, except those listed, RNA from 3 mice was pooled to form sample 1, another 3 mice to form sample 2, etc. Thus, 9 mice were used for the four experimental groups: wild-type, wild-type+quercetin, POR-null, POR-null+quercetin.
2008-06-13 | E-GEOD-4256 | biostudies-arrayexpress
Project description:Using mice deficient in hepatic cytochrome-P450 oxidoreductase (POR), which disables the liver cytochrome P450 system, the metabolism and biological response of the anti-carcinogenic flavonoid, quercetin, was examined. Profiling circulating metabolites revealed similar profiles over 72 h in wild type (WT) and POR-null (KO) mice, showing that hepatic P450 and reduced biliary secretion do not affect quercetin metabolism. Transcriptional profiling at 24 h revealed that 2-3 fold more genes responded significantly to quercetin in WT compared to KO in the jejunum, ileum, colon, and liver, suggesting that hepatic P450s mediate many of the biological effects of quercetin, such as immune function, estrogen receptor signaling and lipid, glutathione, purine, and amino acid metabolism, even though quercetin metabolism is not modified. The functional interpretation of expression data in response to quercetin (single dose of 7 mg/animal) revealed a molecular relationship between the liver and jejunum. In WT animals, amino acid and sterol metabolism were predominantly modulated in the liver, fatty acid metabolism response was shared between the liver and jejunum, and glutathione metabolism was modulated in the small intestine. In contrast, KO animals do not regulate amino acid metabolism in the liver or small intestine, they share the control of fatty acid metabolism between the liver and jejunum, and regulation of sterol metabolism is shifted from the liver to the jejunum and that of glutathione metabolism from the jejunum to the liver. This demonstrates that the quercetin-mediated regulation of these biological functions in extrahepatic tissues is dependent on the functionality of the liver POR. In conclusion, using a systems biology approach to explore the contribution of hepatic phase I detoxification on quercetin metabolism demonstrated the resiliency and adaptive capacity of a biological organism in dealing with a bioactive nutrient when faced with a tissue-specific molecular dysfunction. Experiment Overall Design: All animals were adapted to the RM3 (E) 801710 Soya-free powdered diet (B. S & S. [Scotland] Ltd, UK) over a period of 14 days. Quercetin was added separately to the semi-purified diets at a concentration of 6200 ppm (0.62 %; 6.2 g per kg). 65 male cytochrome P450 reductase null (KO) mice and 65 wild type (WT) C57BL/6 mice were reared, all aged between 6-8 weeks. Animals were housed 3 per cage, where both temperature and relative humidity were maintained within a range of 19-23oC and 40-70%, respectively. Twelve-hour periods of light were cycled with twelve-hour periods of darkness. Experiment Overall Design: For each strain of mouse, the following experimental design was used: a control group (25 mice) receiving powdered RM3 diet ad libitum and a group (25 mice) receiving a â??high doseâ?? of quercetin (7 mg / mouse). The experimental diet was administered on day 15, following a 14-day adaptation period to the RM3 diet. Animals were sacrificed after 24 h. Experiment Overall Design: RNA samples destined for microarray analysis were only accepted and pooled into three groups if no aberrant signs of degradation (e.g. multiple peaks) were observed. The comprehensive gene expression profiles of the liver, jejunum, ileum, and colon were analyzed. In all cases, except those listed, RNA from 3 mice was pooled to form sample 1, another 3 mice to form sample 2, etc. Thus, 9 mice were used for the four experimental groups: wild-type, wild-type+quercetin, POR-null, POR-null+quercetin.
2008-06-13 | E-GEOD-4259 | biostudies-arrayexpress