Search results for "Minas"

showing 10 items of 287 documents

Mitochondrial glutathione depletion by glutamine in growing tumor cells.

2000

The effect of L-glutamine (Gln) on mitochondrial glutathione (mtGSH) levels in tumor cells was studied in vivo in Ehrlich ascites tumor (EAT)-bearing mice. Tumor growth was similar in mice fed a Gln-enriched diet (GED; where 30% of the total dietary nitrogen was from Gln) or a nutritionally complete elemental diet (SD). As compared with non-tumor-bearing mice, tumor growth caused a decrease of blood Gln levels in mice fed an SD but not in those fed a GED. Tumor cells in mice fed a GED showed higher glutaminase and lower Gln synthetase activities than did cells isolated from mice fed an SD. Cytosolic glutamate concentration was 2-fold higher in tumor cells from mice fed a GED ( approximately…

AnionsMalemedicine.medical_specialtyFree RadicalsGlutamineOxidative phosphorylationBiologyMitochondrionMitochondrial Sizemedicine.disease_causeBiochemistryGlutaminase activitychemistry.chemical_compoundMiceAdenosine TriphosphatePhysiology (medical)Internal medicinemedicineAnimalsHumansAmino AcidsCarcinoma Ehrlich TumorGlutaminaseTumor Necrosis Factor-alphaGlutathioneHydrogen-Ion ConcentrationGlutathioneRecombinant ProteinsMitochondriaGlutamineOxidative StressEndocrinologyBiochemistrychemistryOxidative stressFree radical biologymedicine
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Involvement of transglutaminase in the formation of covalent cross-links in the cell wall of Candida albicans.

1995

Activity of the enzyme glutaminyl-peptide--glutamylyl-transferase (EC 2.3.2.13; transglutaminase), which forms the interpeptidic cross-link N epsilon-(gamma-glutamic)-lysine, was demonstrated in cell-free extracts obtained from both the yeast like and mycelial forms of Candida albicans. Higher levels of enzymatic activity were observed in the cell wall fraction, whereas the cytosol contained only trace amounts of activity. Cystamine, a highly specific inhibitor of the enzyme, was used to analyze a possible role of transglutaminase in the organization of the cell wall structure of the fungus. Cystamine delayed protoplast regeneration and inhibited the yeast-to-mycelium transition and the inc…

Antigens FungalTissue transglutaminaseCystamineBiochemistryMicrobiologyEpitopeCell wallFungal Proteinschemistry.chemical_compoundEpitopesCystamineCell WallCandida albicansGeneticsCandida albicansMolecular BiologyAntibodies Fungalchemistry.chemical_classificationTransglutaminasesbiologyProtoplastsAntibodies MonoclonalGeneral Medicinebiology.organism_classificationYeastMolecular WeightCytosolEnzymeBiochemistrychemistrybiology.proteinArchives of microbiology
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Interfering with Arginine Metabolism As a New Treatment Strategy for Multiple Myeloma

2015

Abstract Introduction Starvation of tumor cells from the amino acid arginine has recently gained particular interest because of the downregulation of the rate-limiting enzyme argininosuccinate synthethase 1 (ASS1) in various cancer entities. ASS1-deficient cells cannot resynthesize arginine from citrulline and are therefore considered arginine auxotrophic. The arginine depleting enzyme arginine deiminase (ADI-PEG20, Polaris Pharmaceuticals) is currently tested in phase I-III clinical trials for different arginine auxotrophic cancers. The natural arginine analogue canavanine can compete with arginine for arginyl-tRNA-binding sites and consequently be incorporated into nascent proteins instea…

ArginineCell growthImmunologyCell BiologyHematologyBiologyBiochemistryMolecular biologychemistry.chemical_compoundDownregulation and upregulationchemistryApoptosisCitrullinePropidium iodideCanavanineArginine deiminaseBlood
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Pharmacological blockade of the fatty acid amide hydrolase (FAAH) alters neural proliferation, apoptosis and gliosis in the rat hippocampus, hypothal…

2015

Endocannabinoids participate in the control of neurogenesis, neural cell death and gliosis. The pharmacological effect of the fatty acid amide hydrolase (FAAH) inhibitor URB597, which limits the endocannabinoid degradation, was investigated in the present study. Cell proliferation (phospho-H3(+) or BrdU(+) cells) of the main adult neurogenic zones as well as apoptosis (cleaved caspase-3(+)), astroglia (GFAP(+)), and microglia (Iba1(+) cells) were analyzed in the hippocampus, hypothalamus and striatum of rats intraperitoneally treated with URB597 (0.3 mg/kg/day) at one dose/4-days resting or 5 doses (1 dose/day). Repeated URB597 treatment increased the plasma levels of the N-acylethanolamine…

AstrocitosNeurobiologia del desenvolupamentAmidohidrolasasCannabinoid receptorCarbamatos:Chemicals and Drugs::Amino Acids Peptides and Proteins::Proteins::Intracellular Signaling Peptides and Proteins::Apoptosis Regulatory Proteins::Caspases [Medical Subject Headings]:Phenomena and Processes::Cell Physiological Phenomena::Cell Physiological Processes::Cell Differentiation::Neurogenesis [Medical Subject Headings]medicine.medical_treatment:Chemicals and Drugs::Carbohydrates::Monosaccharides::Hexoses::Glucose [Medical Subject Headings]Apoptosis:Phenomena and Processes::Physiological Phenomena::Body Constitution::Body Weights and Measures::Body Size::Body Weight [Medical Subject Headings]chemistry.chemical_compound:Chemicals and Drugs::Amino Acids Peptides and Proteins::Proteins::Membrane Proteins::Receptors Cell Surface::Receptors G-Protein-Coupled::Receptors Cannabinoid::Receptor Cannabinoid CB1 [Medical Subject Headings]0302 clinical medicine:Chemicals and Drugs::Organic Chemicals::Carboxylic Acids::Acids Acyclic::Carbamates [Medical Subject Headings]Fatty acid amide hydrolaseReceptor cannabinoide CB1:Organisms::Eukaryota::Animals [Medical Subject Headings]FAAHGliosishealth care economics and organizations:Chemicals and Drugs::Nucleic Acids Nucleotides and Nucleosides::Nucleosides::Deoxyribonucleosides::Deoxyuridine::Bromodeoxyuridine [Medical Subject Headings]:Chemicals and Drugs::Lipids::Glycerides::Triglycerides [Medical Subject Headings]Original Research0303 health sciencesNeurogenesisBenzamidas:Chemicals and Drugs::Polycyclic Compounds::Steroids::Cholestanes::Cholestenes::Cholesterol [Medical Subject Headings]Endocannabinoid systemEtanolaminas3. Good healthEndocannabinoides:Chemicals and Drugs::Lipids::Fatty Acids::Fatty Acids Unsaturated::Fatty Acids Monounsaturated::Oleic Acids [Medical Subject Headings]CannabinoidesMicroglíalipids (amino acids peptides and proteins)medicine.symptomColesterol:Chemicals and Drugs::Organic Chemicals::Hydrocarbons::Terpenes::Cannabinoids [Medical Subject Headings]:Chemicals and Drugs::Lipids::Fatty Acids::Palmitic Acids [Medical Subject Headings]psychological phenomena and processesProliferación celularmedicine.medical_specialtyCerebroNeurogenesiseducationBiologyBromodesoxiuridina:Anatomy::Nervous System::Neuroglia::Microglia [Medical Subject Headings]Triglicéridoslcsh:RC321-571Ácidos oléicosRatas03 medical and health sciencesCellular and Molecular NeuroscienceInternal medicineHipocampomedicineCaspasa 3:Anatomy::Nervous System::Central Nervous System::Brain::Limbic System::Hippocampus [Medical Subject Headings]:Phenomena and Processes::Cell Physiological Phenomena::Cell Physiological Processes::Cell Growth Processes::Cell Proliferation [Medical Subject Headings]lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry030304 developmental biologyPalmitoylethanolamide:Chemicals and Drugs::Chemical Actions and Uses::Pharmacologic Actions::Molecular Mechanisms of Pharmacological Action::Neurotransmitter Agents::Endocannabinoids [Medical Subject Headings]:Chemicals and Drugs::Enzymes and Coenzymes::Enzymes::Hydrolases::Amidohydrolases [Medical Subject Headings]Cannabinoids:Anatomy::Cells::Neuroglia::Astrocytes [Medical Subject Headings]Peso corporalEnergy metabolism:Anatomy::Nervous System::Central Nervous System::Brain [Medical Subject Headings]:Anatomy::Nervous System::Central Nervous System::Brain::Limbic System::Hypothalamus [Medical Subject Headings]URB597:Phenomena and Processes::Cell Physiological Phenomena::Cell Physiological Processes::Cell Death [Medical Subject Headings]:Diseases::Pathological Conditions Signs and Symptoms::Pathologic Processes::Gliosis [Medical Subject Headings]:Chemicals and Drugs::Organic Chemicals::Amines::Amino Alcohols::Ethanolamines [Medical Subject Headings]Muerte celular:Phenomena and Processes::Cell Physiological Phenomena::Cell Physiological Processes::Cell Death::Apoptosis [Medical Subject Headings]:Organisms::Eukaryota::Animals::Chordata::Vertebrates::Mammals::Rodentia::Muridae::Murinae::Rats [Medical Subject Headings]EndocrinologyURB597chemistryGliosisnervous systemGlucosaCannabinoidEnergy Metabolism:Chemicals and Drugs::Organic Chemicals::Amides::Benzamides [Medical Subject Headings]HipotálamoÁcidos palmíticos030217 neurology & neurosurgeryNeuroscienceFrontiers in Cellular Neuroscience
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Comparative survey of putrescine production from agmatine deamination in different bacteria

2008

This article aims to study putrescine production in Lactobacillus hilgardii strain X1B, an agmatine degrader isolated from wine, and to compare it with three other different species, previously reported as putrescine producers from agmatine: Pseudomonas aeruginosa PAO1, Enterococcus faecalis ATCC11700 and Bacillus cereus CECT 148T. The effect of different biogenic amines, organic acids, cofactors, amino acids and sugars on putrescine production was evaluated. In some cases, a similar effect was found in all the strains studied but the magnitude differed. Arginine, glucose and fructose showed an inhibitory effect, whereas the presence of agmatine induced the production of putrescine in all m…

Biogenic AminesAgmatineArginineOtras Ciencias Biológicasved/biology.organism_classification_rank.speciesSpermineWineLactobacillus hilgardiiBiologyArginineMicrobiologyEnterococcus faecalisCiencias Biológicaschemistry.chemical_compoundBacillus cereusSpecies SpecificityEnterococcus faecalisPutrescineved/biologyBIOGENIC AMINESWINEbiology.organism_classificationPUTRESCINESpermidineAgmatine deiminaseLactobacilluschemistryBiochemistryPseudomonas aeruginosaPutrescineAGMATINE DEIMINASEAgmatineCIENCIAS NATURALES Y EXACTASFood ScienceFood Microbiology
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The effects of alpha-cypermethrin exposure on biochemical and redox parameters in pregnant rats and their newborns

2016

IF 2.388; International audience; Pyrethroid insecticides are extensively used in agriculture and in household activities. During pregnancy, they might affect maternal metabolic status and there after fetal development. In this work, we studied metabolic and redox effects of low dose alpha-cypermethrin exposure in pregnant rats and their offspring. The diet containing alpha cypermethrin at 0.02 mg/kg/day was consumed during the entire gestation. Plasma biochemical parameters as well as liver lipid and oxidative stress markers were determined. Our results showed that alpha-cypermethrin induced an increase in body weight and in plasma glucose and lipid levels, as well as in plasma aspartate a…

Blood Glucose0301 basic medicineLipid-PeroxidationInsecticidesHealth Toxicology and Mutagenesismedicine.disease_causeCypermethrinchemistry.chemical_compoundMice0302 clinical medicinePregnancyMalondialdehydePyrethrinsMaternal-Fetal Exchange[ SDV.MHEP.PHY ] Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO]Alpha-cypermethrinAlanine TransaminaseGeneral Medicine030224 pathologyGlutathioneLipidsMitochondriaLiverPrenatal Exposure Delayed EffectsGestationAlkaline phosphataseFemaleChlorpyrifosOxidation-Reductionmedicine.medical_specialtyOffspringBlood sugarBiology03 medical and health sciencesProtective RoleOffspringMetabolic DiseasesInternal medicinemedicineNeurotoxicityAnimalsAspartate AminotransferasesRats WistarPesticides[ SDV.BBM ] Life Sciences [q-bio]/Biochemistry Molecular BiologyPregnancyFetusBody Weightmedicine.diseaseRatsOxidative Stress030104 developmental biologyEndocrinologyMetabolismAnimals NewbornchemistryRatAgronomy and Crop ScienceDeltamethrinFenvalerateOxidative stress
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Hepatic steatosis and insulin resistance are associated with severe fibrosis in patients with chronic hepatitis caused by HBV or HCV infection.

2011

BACKGROUND AND AIMS: Steatosis and insulin resistance (IR) are the major disease modifying in patients with chronic hepatitis C (CHC). Only few studies evaluated these features in patients with chronic hepatitis B (CHB). We aimed to assess the prevalence and the factors related to steatosis and IR in CHB patients, compared with CHC subjects, and to evaluate the potential association between these features and fibrosis severity. MATERIAL AND METHODS: One hundred and seventy consecutive patients with CHB (28 HBeAg positive, 142 HBeAg negative), were evaluated using liver biopsy and metabolic measurements and matched for sex, age and body mass index with 170 genotype 1 CHC patients. IR was def…

Blood GlucoseLiver CirrhosisMaleSettore MED/09 - Medicina InternaBiopsyEnzyme-Linked Immunosorbent AssaySettore MED/08 - Anatomia PatologicaSettore MED/13 - EndocrinologiaBody Mass IndexteatosisHBVPrevalenceHumansInsulinHepatitis B AntibodiesTriglyceridesImmunoassaySettore MED/12 - GastroenterologiaHBV;HCV;steatosisAlanine TransaminaseHepatitis BHepatitis CFatty LiverItalyHCVRegression AnalysisFemaleInsulin ResistanceLiver international : official journal of the International Association for the Study of the Liver
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Routine HCV PCR screening of blood donations to identify early HCV infection in blood donors lacking antibodies to HCV

2001

BACKGROUND: Detection of early hepatitis C infection of blood donors is still a major problem for blood transfusion. Common anti-HCV screening assays show differences in sensitivity and specificity. The often mild symptoms of acute hepatitis C also cause difficulties in the identification of early HCV infection. The feasibility and efficacy of routine screening of blood donations for HCV RNA were investigated. STUDY DESIGN AND METHODS: Blood donations (n = 251,737) were screened for HCV RNA over 4 years. RNA extraction, amplification, and detection were done by two commercial HCV PCR kits (HCV Cobas Amplicor and HCV Cobas Amplicor 2.0, Roche Diagnostics). Screening was done by pool testing …

Blood transfusionmedicine.medical_treatmentHepacivirusImmunologyBlood DonorsHepacivirusPolymerase Chain ReactionSensitivity and SpecificitySerologymedicineHumansMass ScreeningImmunology and AllergyAspartate AminotransferasesMass screeningbiologybusiness.industryvirus diseasesAlanine TransaminaseHematologyHepatitis CHepatitis C Antibodiesbiology.organism_classificationmedicine.diseaseHepatitis CVirologydigestive system diseasesImmunologybiology.proteinFeasibility StudiesRNA ViralRNA extractionViral diseaseAntibodybusinessFollow-Up StudiesTransfusion
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Influence of Age on Cerebral Housekeeping Gene Expression for Normalization of Quantitative Polymerase Chain Reaction after Acute Brain Injury in Mice

2015

To prevent methodological errors of quantitative PCR (qPCR) normalization with reference genes is obligatory. Although known to influence gene expression, impact of age on housekeeping gene expression has not been determined after acute brain lesions such as traumatic brain injury (TBI). Therefore, expression of eight common control genes was investigated at 15 min, 24 h, and 72 h after experimental TBI in 2- and 21-month-old C57Bl6 mice. Expression of β2-microglobulin (B2M), β-actin (ActB), and porphobilinogen deaminase (PBGD) increased after TBI in both ages. β2M demonstrated age-dependent differences and highest inter- and intragroup variations. Expression of cyclophilin A, glyceraldehyd…

Brain ChemistryMaleAgingDNA ComplementaryGenes EssentialInterleukin-6Porphobilinogen deaminaseGene DosageBiologyPolymerase Chain ReactionMolecular biologyHousekeeping geneMice Inbred C57BLMiceCyclophilin AReal-time polymerase chain reactionGene Expression RegulationHypoxanthine-guanine phosphoribosyltransferaseBrain InjuriesReference genesGene expressionAnimalsRNANeurology (clinical)GeneJournal of Neurotrauma
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Budesonide in previously untreated autoimmune hepatitis

2005

Background: Autoimmune hepatitis (AIH) is a chronic liver disease that is effectively treated with immunosuppressive therapy. Predniso(lo)ne, often in combination with azathioprine, is the basic therapeutic option to induce remission. However, this regimen can cause numerous side effects. The aim of the present study was to evaluate budesonide as a treatment option in the induction of remission in patients with previously untreated AIH. Methods: Between October 1998 and August 1999, 12 patients were treated with 3 mg budesonide thrice daily for 3 months in this open one-arm multicenter phase IIa study. Primary end point was induction of remission indicated by a drop of aspartate aminotransf…

BudesonideAdultMalemedicine.medical_specialtybudesonideAzathioprinePREDNISOLONEAutoimmune hepatitisChronic liver diseaseGastroenterologyInflammatory bowel diseaseLiver diseaseLIVER-DISEASEInternal medicinemedicineHumansAgedHepatologyautoimmune hepatitisbusiness.industryCHRONIC ACTIVE HEPATITISCORTICOSTEROID-THERAPYAlanine TransaminaseMiddle Agedmedicine.diseaseCROHNS-DISEASERegimenHepatitis AutoimmuneImmunologyPrednisoloneFemaleTRIALORAL BUDESONIDEbusinesstreatment optionsmedicine.drugINFLAMMATORY-BOWEL-DISEASELiver international
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