Search results for "O-2"

showing 10 items of 854 documents

Estudios in vitro de mecanismos de transporte y toxicidad de especies arsenicales a nivel intestinal

2013

El arsénico es un metaloide ampliamente distribuido en el medioambiente, del cual existen numerosas formas químicas con características toxicológicas muy diferentes. En la actualidad, las formas inorgánicas son la que mayor interés despiertan, ya que se consideran carcinogénicas para el hombre. Se estima que alrededor de 140 millones de personas están afectadas por consumo de agua contaminada con niveles de arsénico que superan los máximos recomendados por la Organización Mundial de la Salud (10 µg/L). Los problemas de salud derivados de la exposición a este contaminante alcanzan gran magnitud en ciertas áreas geográficas de India, Bangladesh y Argentina, donde por características geológica…

UNESCO::CIENCIAS MÉDICAS::Ciencias de la Nutrición::Toxicidad de los alimentos:CIENCIAS MÉDICAS::Ciencias de la Nutrición::Toxicidad de los alimentos [UNESCO]UNESCO::CIENCIAS MÉDICAS::ToxicologíaUNESCO::CIENCIAS DE LA VIDA::Biología celular::Cultivo celularCaco-2digestión gastrointestinaltoxicologiabioaccesibilidadUNESCO::CIENCIAS MÉDICAS::Ciencias de la Nutrición::Sustancias tóxicas naturales:CIENCIAS DE LA VIDA::Biología celular::Cultivo celular [UNESCO]inflamación:CIENCIAS MÉDICAS::Ciencias de la Nutrición::Sustancias tóxicas naturales [UNESCO]cocultivo:CIENCIAS MÉDICAS::Toxicología [UNESCO]arsénicoHT29-MTX
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Inhibition of Folic Acid Uptake by Catechins and Tea Extracts in Caco-2 Cells

2006

In this present study it was aimed to determine whether the catechins contained in green tea and the whole extracts of Camellia sinensis (Theaceae) inhibit the uptake of folic acid by Caco-2 cell monolayers. Our results indicate that (-)-epigallocatechin 3-gallate (EGCG) and (-)-epicatechin 3-gallate (ECG) inhibit cellular folic acid uptake with IC50 values of 34.8 micromol/L and 30.8 micromol/L, respectively. Furthermore, green and black tea extracts were also found to inhibit folic acid uptake with IC50 values of approximately 7.5 and 3.6 mg/mL, respectively. According to these results, simultaneous intake of tea and folic acid may inhibit intestinal folic acid absorption. The consequence…

VitaminFlavonoidPharmaceutical SciencePharmacognosyAntioxidantsCamellia sinensisCatechinAnalytical Chemistrylaw.inventionInhibitory Concentration 50chemistry.chemical_compoundFolic AcidlawDrug DiscoveryHumansPhenolsTheaceaeFood sciencePharmacologychemistry.chemical_classificationbiologyPlant ExtractsOrganic Chemistryfood and beveragesCatechinbiology.organism_classificationIntestinal AbsorptionComplementary and alternative medicinechemistryBiochemistryPolyphenolMolecular MedicineCaco-2 CellsPhytotherapyPhytotherapyPlanta Medica
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Anti-inflammatory Function of High-Density Lipoproteins via Autophagy of IκB Kinase

2015

Background & Aims: Plasma levels of high-density lipoprotein (HDL) cholesterol are frequently found decreased in patients with inflammatory bowel disease (IBD). Therefore, and because HDL exerts anti-inflammatory activities, we investigated whether HDL and its major protein component apolipoprotein A-I (apoA-I) modulate mucosal inflammatory responses in vitro and in vivo. Methods: The human intestinal epithelial cell line T84 was used as the in vitro model for measuring the effects of HDL on the expression and secretion of tumor necrosis factor (TNF), interleukin-8 (IL-8), and intracellular adhesion molecule (ICAM). Nuclear factor-κB (NF-κB)-responsive promoter activity was studied by …

WT wild typeApolipoprotein BEMSA electrophoretic mobility shift assayMPO myeloperoxidaseIκB kinaseDSS dextran sodium sulphatemTOR the mammalian target of rapamycinRT-PCR real-time polymerase chain reactionNF-κBchemistry.chemical_compound540 ChemistryApoA-I apolipoprotein A-I10038 Institute of Clinical ChemistryOriginal ResearchTNF tumor necrosis factorbiologyIBD inflammatory bowel diseaseChemistryGastroenterologyMyeloperoxidase10076 Center for Integrative Human PhysiologyMEICS murine endoscopic index of colitis severityTumor necrosis factor alphalipids (amino acids peptides and proteins)3-MA 3-methyl adenineNF-κB nuclear factor κBHDL high-density lipoproteinLC3II light chain 3 IIPBS phosphate-buffered salinep-IKK phosphorylated IκB kinase610 Medicine & healthICAM intracellular adhesion molecule246-Trinitrobenzenesulfonic acidTg transgenicmedicineAutophagyCD Crohn’s disease2715 GastroenterologyColitislcsh:RC799-869KO knockoutHepatologyApolipoprotein A-IAutophagyInflammatory Bowel DiseaseTNBS 246-trinitrobenzenesulfonic acidmedicine.diseaseMolecular biologyIL interleukinsiRNA small interfering RNAPI-3 phosphatidylinositol-3Immunologybiology.protein2721 Hepatologylcsh:Diseases of the digestive system. GastroenterologyPFA paraformaldehydeLipoproteinDAPI 4′6-diamidino-2-phenylindoleCMGH Cellular and Molecular Gastroenterology and Hepatology
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Mercury and selenium in fish and shellfish: Occurrence, bioaccessibility and uptake by Caco-2 cells

2012

This study evaluates Hg and Se concentrations and bioaccessibility (element solubilised after simulated gastrointestinal digestion) in 16 raw seafood species consumed in Spain. The concentrations varied greatly (Hg, 3.8-1621 ng/g wet weight, ww; Se, 84-1817 ng/g ww). Only one sample of swordfish exceeded the Hg limit permitted in Spain (1mg/kg), and for this sample the Hg/Se molar ratio and Se Health Benefit Value food safety criteria also indicated the presence of a risk. Bioaccessibility of Hg (35-106%) and Se (17-125%) was very variable and the Hg/Se molar ratio in the bioaccessible fraction was less than one for all samples. Transport by Caco-2 cells, an intestinal epithelium model, was…

Wet weightSwordfishFishesBiological Availabilitychemistry.chemical_elementMercuryGeneral MedicineHealth benefitsToxicologyMercury (element)SeleniumSpectrometry FluorescencechemistryCaco-2Molar ratioEnvironmental chemistryAnimalsHumansCaco-2 CellsShellfishSeleniumShellfishFood ScienceFood and Chemical Toxicology
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CCDC 1857871: Experimental Crystal Structure Determination

2018

Related Article: Marta Martínez-Alonso, Natalia Busto, Larry Danilo Aguirre, Leticia Berlanga, M. Carmen Carrión, José V. Cuevas, Ana M. Rodríguez, Arancha Carbayo, Blanca R. Manzano, Enrique Ortí, Félix A. Jalón, Begoña García, Gustavo Espino|2018|Chem.-Eur.J.|24|17523|doi:10.1002/chem.201803784

[2-(1H-benzimidazol-2-yl)phenolatato]-bis[35-difluoro-2-(pyridin-2-yl)phenyl]-iridium(iii) acetone solvateSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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Decay and Fission Hindrance of Two- and Four-Quasiparticle K Isomers in 254Rf

2015

International audience; Two isomers decaying by electromagnetic transitions with half-lives of 4.7(1.1) and 247(73) mu s have been discovered in the heavy (254)Rf nucleus. The observation of the shorter-lived isomer was made possible by a novel application of a digital data acquisition system. The isomers were interpreted as the K-pi = 8(-), nu(2)(7/2(+)[624]; 9/2(-)[734]) two-quasineutron and the K-pi = 16(+), 8(-)nu(2)(7/2(+)[624]; 9/2(-)[734] circle times 8(-)pi(2) (7/2(-)[514]; 9/2(+)[624]) four-quasiparticle configurations, respectively. Surprisingly, the lifetime of the two-quasiparticle isomer is more than 4 orders of magnitude shorter than what has been observed for analogous isomer…

[PHYS]Physics [physics]General PhysicsNO-254nuclear isomersEngineeringNUCLEISTATESPhysical Sciencesrutherfordium[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]FM-250Mathematical Sciences
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Etude du rôle des jonctions serrées dans l’interaction de Candida albicans avec les cellules entérocytaires Caco-2

2012

Rapport de stage de Master 2 EA MERS Hors CT hors EJ; Master

[SDV] Life Sciences [q-bio][SDE] Environmental Sciences[SDV]Life Sciences [q-bio]Candida albicans[SDE]Environmental Sciences[SDV.BV]Life Sciences [q-bio]/Vegetal Biology[SDV.BV] Life Sciences [q-bio]/Vegetal BiologyCaco-2cellule entérocytairejonction serrée
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Photocrosslinking of dextran and polyaspartamide derivatives: a combination suitable for colon-specific drug delivery.

2007

Abstract The aim of this study was to prepare and characterize novel hydrogels with polysaccharide–polyaminoacid structure, able to undergo an enzymatic hydrolysis in the colon and potentially useful for treating inflammatory bowel diseases (IBD). Starting materials were methacrylated dextran (DEX-MA) and methacrylated α,β-poly(N-2-hydroxyethyl)- dl -aspartamide (PHM). These polymers were photocrosslinked by exposure of their aqueous solutions at 313 nm without photoinitiators. Different samples, shaped as microparticles, were obtained as a function of polymer concentration and irradiation time. FT-IR analysis confirmed the occurrence of a co-crosslinking between DEX-MA and PHM in all exper…

alpha; beta-poly(n-2-hydroxyethyl)-dl-aspartamide; biodegradable hydrogels; colon drug delivery; dextran; photocrosslinking; α; β-poly(n-2-hydroxyethyl)-dl-aspartamidealphaCell SurvivalColonPhotochemistryDrug CompoundingαPharmaceutical ScienceDosage formchemistry.chemical_compoundDrug StabilityEnzymatic hydrolysismedicineCell AdhesionOrganic chemistryHumansParticle Sizeβ-poly(n-2-hydroxyethyl)-dl-aspartamideDrug CarriersChromatographyDextranaseAqueous solutionChemistryHydrolysisbiodegradable hydrogelstechnology industry and agriculturecolon drug deliveryBeclomethasoneMucinsDextransHydrogelsHydrogen-Ion ConcentrationDextranCross-Linking Reagentsbeta-poly(n-2-hydroxyethyl)-dl-aspartamidedextranDrug deliverySelf-healing hydrogelsMethacrylatesSwellingmedicine.symptomphotocrosslinkingCaco-2 CellsPeptidesJournal of controlled release : official journal of the Controlled Release Society
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New 1,2,4-oxadiazole nortopsentin derivatives with cytotoxic activity

2019

New analogs of nortopsentin, a natural 2,4-bis(3&prime

anti-cancer agentCell SurvivalAnti-cancer agentsPharmaceutical ScienceAntineoplastic AgentsAntiproliferative activity01 natural sciencesArticlechemistry.chemical_compoundStructure-Activity RelationshipMarine alkaloidsSettore BIO/10 - BiochimicaDrug DiscoveryMoietyHumansPharmacology Toxicology and Pharmaceutics (miscellaneous)lcsh:QH301-705.5Cell ProliferationIndole testMolecular Structure010405 organic chemistryAcridine orangeImidazoles2 4-oxadiazole derivativesnortopsentin analogs2 4-oxadiazole derivatives; Anti-cancer agents; Antiproliferative activity; Marine alkaloids; Nortopsentin analogs 1; Antineoplastic Agents; Caco-2 Cells; Cell Cycle Checkpoints; Cell Proliferation; Cell Survival; HCT116 Cells; Humans; Imidazoles; MCF-7 Cells; Molecular Structure; Structure-Activity RelationshipPhosphatidylserineCell Cycle CheckpointsNortopsentin analogs 1HCT116 CellsSettore CHIM/08 - Chimica Farmaceutica0104 chemical sciences124-oxadiazole derivative010404 medicinal & biomolecular chemistrychemistryBiochemistry124-oxadiazole derivativeslcsh:Biology (General)ApoptosisCell cultureCancer cellMCF-7 CellsMarine alkaloid2 4-oxadiazole derivativeCaco-2 CellsEthidium bromide
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CCDC 961048: Experimental Crystal Structure Determination

2014

Related Article: Manideepa Saha, Rajendar Nasani, Mriganka Das, Arup Mahata, Biswarup Pathak, Shaikh M. Mobin, Luca M. Carrella, Eva Rentschler, Suman Mukhopadhyay|2014|Dalton Trans.|43|8083|doi:10.1039/C4DT00378K

azido-(4-chloro-2-(((2-(dimethylamino)ethyl)imino)methyl)phenolato)-nickel(ii)Space GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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