0000000000962045

AUTHOR

Cristina Rodríguez-antona

showing 4 related works from this author

Transcriptional Regulation of Human CYP3A4 Basal Expression by CCAAT Enhancer-Binding Protein α and Hepatocyte Nuclear Factor-3γ

2003

Cytochrome P450 3A4 (CYP3A4) is involved in the metabolism of more than 50% of currently used therapeutic drugs, yet the mechanisms that control CYP3A4 basal expression in liver are poorly understood. Several putative binding sites for CCAAT/enhancer-binding protein (C/EBP) and hepatic nuclear factor 3 (HNF-3) were found by computer analysis in CYP3A4 promoter. The use of reporter gene assays, electrophoretic mobility shift assays, and site-directed mutagenesis revealed that one proximal and two distal C/EBP alpha binding sites are essential sites for the trans-activation of CYP3A4 promoter. No trans-activation was found in similar reporter gene experiments with a HNF-3 gamma expression vec…

Transcriptional ActivationTranscription GeneticGenetic VectorsBiologyTransfectiondigestive systemGene Expression Regulation EnzymologicChromatin remodelingAdenoviridaeCytochrome P-450 Enzyme SystemCCAAT-Enhancer-Binding Protein-alphamedicineCytochrome P-450 CYP3AHumansEnzyme InhibitorsBinding sitePromoter Regions GeneticCells CulturedPharmacologyReporter geneExpression vectorCcaat-enhancer-binding proteinsNuclear ProteinsMolecular biologyChromatinDNA-Binding ProteinsHistone Deacetylase InhibitorsHepatocyte nuclear factorsTrichostatin AHepatocytesMolecular MedicineHepatocyte Nuclear Factor 3-gammaTranscription Factorsmedicine.drugMolecular Pharmacology
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Differential Gene Expression of Medullary Thyroid Carcinoma Reveals Specific Markers Associated with Genetic Conditions

2013

Maliszewska, Agnieszka et al.

Pathologymedicine.medical_specialtyendocrine system diseasesInheritance PatternsMultiple endocrine neoplasia type 2ApoptosisBiologyGermlinePathology and Forensic MedicineThyroid carcinomaAntigens CDCell Line TumormedicineBiomarkers TumorGene silencingCluster AnalysisHumansGenetic Predisposition to DiseaseAC133 AntigenGene SilencingThyroid NeoplasmsRNA Small InterferingGlycoproteinsRegulation of gene expressionTissue microarrayReverse Transcriptase Polymerase Chain ReactionGene Expression ProfilingWnt signaling pathwaymedicine.diseaseImmunohistochemistryCarcinoma NeuroendocrineGene expression profilingGene Expression Regulation NeoplasticGene Knockdown TechniquesCancer researchPeptides
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Quantitative RT-PCR measurement of human cytochrome P-450s: application to drug induction studies.

2000

A quantitative RT-PCR assay has been developed that is able to measure the mRNA content of the major human CYPs (1A1, 1A2, 2A6, 2B6, 2C9, 2C19, 2D6, 2E1, 3A4, and 3A5). The technique is highly specific, reproducible, rapid, and sensitive enough to quantitate low and high abundant mRNAs. The PCR primers were selected to specifically match each CYP mRNA, to have a very close annealing temperature, and to render PCR products of similar sizes. The PCR conditions were designed to allow the simultaneous measurement of the various human liver CYPs in a single run. To achieve precise and reproducible quantitation of each cytochrome mRNA, a external standard (luciferase mRNA) is added to the probes …

Gene isoformCytochromeBiophysicsBiochemistrySensitivity and Specificitychemistry.chemical_compoundCytochrome P-450 Enzyme SystemComplementary DNAHumansLuciferaseRNA MessengerMolecular BiologyCells CulturedDNA PrimersMessenger RNAbiologyBase SequenceReverse Transcriptase Polymerase Chain ReactionCYP1A2Molecular biologyActinsReal-time polymerase chain reactionchemistryLiverEvaluation Studies as TopicEnzyme Inductionbiology.proteinXenobioticArchives of biochemistry and biophysics
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Cytochrome P-450 mRNA expression in human liver and its relationship with enzyme activity.

2001

CYP activity and protein contents have been measured in human liver using different techniques. In contrast, CYP mRNA data are scarce and the relationships between CYP mRNA contents and activities have not been established. These studies deserve further attention because mRNA determinations by RT-PCR require a very small amount of material (e.g., liver needle biopsy) and could provide important data regarding CYP expression regulation. In this study we measured in 12 human liver samples the mRNA contents of 10 CYPs by quantitative RT-PCR and the metabolic activities using specific substrates. mRNA contents and activities showed high correlation coefficients for CYP1A1, CYP1A2, CYP3A4, CYP2D…

AdultMaleCYP2B6BiophysicsGene Expressiondigestive systemBiochemistryCytochrome P-450 Enzyme SystemHumansheterocyclic compoundsRNA MessengerCYP2A6Molecular BiologyCYP2C9AgedMessenger RNAbiologyCYP3A4CYP1A2respiratory systemCYP2E1Middle AgedMolecular biologyEnzyme assayIsoenzymesBiochemistryLiverbiology.proteinMicrosomes LiverFemaleArchives of biochemistry and biophysics
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