Search results for " multidrug resistance"

showing 10 items of 29 documents

Laurus nobilis L. Seed Extract Reveals Collateral Sensitivity in Multidrug-Resistant P-Glycoprotein-Expressing Tumor Cells.

2015

The frequent failure of standard cancer chemotherapy requires the development of novel drugs capable of killing otherwise drug-resistant tumors. Here, we have investigated a chloroform extract of Laurus nobilis seeds. Fatty acids and 23 constituents of the volatile fraction were identified by gas chromotography/flame ionization detection (GC/FID) and gas chromatography/mass spectrometry (GC/MS), in good agreement with (1)H NMR (nuclear magnetic resonance) spectrum. Multidrug-resistant P-glycoprotein-expressing CEM/ADR5000 leukemia cells were hypersensitive (collaterally sensitive) toward this extract compared to drug-sensitive CCRF-CEM cells, whereas CEM/ADR5000 cells were 2586-fold resista…

Cancer ResearchATP Binding Cassette Transporter Subfamily BCell SurvivalABC transporter Cancer Lauraceae Multidrug resistance Oncobiogram SpiceMedicine (miscellaneous)Multidrug resistanceLaurusGas Chromatography-Mass SpectrometryFlow cytometryNOchemistry.chemical_compoundLauraceaeLaurus nobilisfoodCell Line TumormedicineHumansDoxorubicinP-glycoproteinCancerNutrition and DieteticsChromatographyLeukemiabiologymedicine.diagnostic_testChemistryPlant ExtractsOncobiogramMolecular biologyAntineoplastic Agents Phytogenicfood.foodMultiple drug resistanceOleic acidSpiceEucalyptolOncologyCell cultureDoxorubicinDrug Resistance NeoplasmSeedsbiology.proteinABC transportermedicine.drugNutrition and cancer
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Apoptotic effects of thiazolobenzimidazole derivatives on sensitive and multidrug resistant leukaemic cells

2001

We investigated the cytotoxic activity of eight thiazolobenzimidazole derivatives on sensitive HL60 and multidrug-resistant (MDR) (HL60R) leukaemia cell lines. The antitumour effects of these compounds were compared with those of RS-TBZ, a thiazolobenzimidazole derivative, previously described in our reports, that was able to induce apoptosis more markedly in MDR cells than in the parental sensitive cell lines. Only two compounds in this study proved to have interesting effects: (a) the S-enantiomer of TBZ, that was able to induce apoptosis in MDR cells in a slightly more selective manner than TBZ (racemic form); and (b) TBZ-4-OCH3 (TBZ-4-OCH3), that showed cytotoxic and apoptotic effects o…

Cancer ResearchHL60Antineoplastic AgentsHL-60 CellsApoptosisBiologyMultidrug resistanceCaspase 8Anticancer drugschemistry.chemical_compoundAntigenCytotoxic T cellHumansLeukaemiafas ReceptorProgenitor cellLeukemiaCell CycleCaspase InhibitorsDrug Resistance MultipleMultiple drug resistanceThiazolobenzimidazoleThiazolesAnticancer drugs; Apoptosis; Leukaemia; Multidrug resistance; Thiazolobenzimidazole;OncologychemistryCell cultureApoptosisDrug Resistance NeoplasmImmunologyCancer researchBenzimidazoles
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Phytochemical Analysis and Cytotoxicity Towards Multidrug-Resistant Leukemia Cells of Essential Oils Derived from Lebanese Medicinal Plants

2012

Juniperus excelsa fruit essential oil as well as J. oxycedrus, Cedrus libani, and Pinus pinea wood essential oils have been obtained with yields between 2.2 ± 0.3 % to 3.4 ± 0.5 % and analyzed by gas chromatography. Sesquiterpenes mainly characterized C. libani and J. oxycedrus essential oils, while in P. pinea and J. excelsa, monoterpenes were the most abundant compounds. In J. oxycedrus, cis-calamenene (7.8 %), cuparene (3.8 %), and cis-thujopsenal (2.0 %) have been detected for the first time. The cytotoxic activity of these essential oils against drug-sensitive CCRF-CEM and multidrug-resistant P-glycoprotein-expressing CEM/ADR5000 leukemia cells has been investigated (IC₅₀ values: 29.46…

Cupressaceaegas chromatographyPharmaceutical ScienceAnalytical Chemistrylaw.inventionlawDrug DiscoveryTumor Cells CulturedLebanonMedicinal plantsLeukemiabiologyTraditional medicinePinaceaeWoodDrug Resistance MultiplePhytochemicalJuniperus excelsaPinaceaeMolecular MedicineSesquiterpenesJuniperus oxycedruscancer; essential oils; gas chromatography; multidrug resistance; Juniperus excelsa; Juniperus oxycedrus; Cupressaceae; Cedrus libani; Pinus pinea; PinaceaeNOmultidrug resistanceBotanyOils VolatileHumanscancerCedrusessential oilsEssential oilCedrus libaniPharmacologyPlants MedicinalOrganic ChemistryCupressaceaePinusbiology.organism_classificationCedrus libaniAntineoplastic Agents PhytogenicComplementary and alternative medicineDrug Resistance NeoplasmFruitJuniperusMonoterpenesPinus pineaJuniperus excelsaJuniperus oxycedrusPhytotherapyPlanta Medica
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A comprehensive study of polymorphisms in the ABCB1, ABCC2, ABCG2, NR1I2 genes and lymphoma risk.

2011

Owing to their role in controlling the efflux of toxic compounds, transporters are central players in the process of detoxification and elimination of xenobiotics, which in turn is related to cancer risk. Among these transporters, ATP-binding cassette B1/multidrug resistance 1 (ABCB1/MDR1), ABCC2/multidrug resistance protein 2 (MRP2) and ABCG2/breast cancer resistance protein (BCRP) affect susceptibility to many hematopoietic malignancies. The maintenance of regulated expression of these transporters is governed through the activation of intracellular "xenosensors" like the nuclear receptor 1I2/pregnane X receptor (NR1I2/PXR). SNPs in genes encoding these regulators have also been implicate…

Cytoplasmic And Nuclear ReceptorTechnologyCancer ResearchReceptors SteroidAbcg2Chronic lymphocytic leukemiaGeneBCL9Risk FactorsXenobioticATP Binding Cassette Transporter Subfamily G Member 2Poisonmultidrug resistance protein 2AlleleGeneticseducation.field_of_studyPregnane X receptorB-Cell Chronic Lymphocytic LeukemiabiologyMultidrug resistance-associated protein 2pregnane x receptorMultiple Drug ResistanceMultidrug Resistance-Associated Protein 2Neoplasm Proteinsmultidrug resistance 1Oncologybreast cancer resistance proteinMultidrug Resistance-Associated ProteinsCase-Control StudieBreast NeoplasmMultidrug Resistance-Associated ProteinsB-Cell LymphomaATP Binding Cassette Transporter Subfamily BATP-Binding Cassette TransporterMaintenancePopulationPopulationSingle-nucleotide polymorphismlymphomaPolymorphism Single NucleotideArticlemedicineHumansGenetic Predisposition to DiseaseATP Binding Cassette Transporter Subfamily B Member 1educationRegulator GeneHematologic NeoplasmProteinsmedicine.diseaseHaplotypeslymphoma; multidrug resistance 1; multidrug resistance protein 2; breast cancer resistance protein; pregnane x receptorSingle Nucleotide Polymorphismbiology.proteinNeoplasmATP-Binding Cassette Transporters
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Antitumor Effect of Glandora rosmarinifolia (Boraginaceae) Essential Oil through Inhibition of the Activity of the Topo II Enzyme in Acute Myeloid Le…

2022

It was previously shown that the antitumor and cytotoxic activity of the essential oil (EO) extracted from the aerial parts of Glandora rosmarinifolia appears to involve a pro-oxidant mechanism in hepatocellular carcinoma (HCC) and in triple-negative breast cancer (TNBC) cell lines. Its most abundant compound is a hydroxy-methyl-naphthoquinone isomer. Important pharmacological activities, such as antitumor, antibacterial, antifungal, antiviral and antiparasitic activities, are attributed to naphthoquinones, probably due to their pro-oxidant or electrophilic potential; for some naphthoquinones, a mechanism of action of topoisomerase inhibition has been reported, in which they appear to act b…

EOs; napthoquinone; Topo II; multidrug resistancenapthoquinonemultidrug resistanceChemistry (miscellaneous)EOOrganic ChemistryDrug DiscoverySettore BIO/14 - FarmacologiaMolecular MedicinePharmaceutical ScienceTopo IIPhysical and Theoretical ChemistryAnalytical ChemistryMolecules
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Epidemiology of intra-abdominal infection and sepsis in critically ill patients: "AbSeS", a multinational observational cohort study and ESICM Trials…

2019

Pardo-Oviedo, Juan Mauricio/0000-0003-0084-3449; Lopez-Delgado, Juan Carlos/0000-0003-3324-1129; Corradi, Francesco/0000-0002-5588-2608; De Backer, Daniel/0000-0001-9841-5762; POTA, VINCENZO/0000-0001-9999-3388; Tomescu, Dana/0000-0001-9673-5754; Sabetian, Golnar/0000-0001-8764-2150; Girardis, Massimo/0000-0002-2453-0829; Brazzi, Luca/0000-0001-7059-0622; Leone, Marc/0000-0002-3097-758X; Zabolotskikh, Igor Borisovich/0000-0002-3623-2546; De Lange, Dylan/0000-0002-0191-7270; ALMEKHLAFI, GHALEB A./0000-0002-0323-7025; Elke, Gunnar/0000-0002-4948-1605; Grigoras, Ioana/0000-0001-9412-9574; Czuczwar, Miroslaw/0000-0002-9025-6717; Nora, David/0000-0002-1133-7368; Masjedi, Mansoor/0000-0001-6175-9…

Infection riskMaleBIOMEDICINE AND HEALTHCARE. Clinical Medical Sciences.Antibiotic resistanceTracte gastrointestinal - MalaltiesDefinitionsCritical Care and Intensive Care MedicineTHERAPYDEFINITIONS:Infections::Intraabdominal Infections [DISEASES]0302 clinical medicineIntensive care; Intra-abdominal infection; Mortality; Multidrug resistance; Peritonitis; Sepsis;[SDV.MHEP.MI]Life Sciences [q-bio]/Human health and pathology/Infectious diseasesObservational studySeptic shockIntensive care; Intra-abdominal infection; Mortality; Multidrug resistance; Peritonitis; SepsisComputingMilieux_MISCELLANEOUSCritical Illness/epidemiology[SDV.MHEP.ME]Life Sciences [q-bio]/Human health and pathology/Emerging diseasesBIOMEDICINA I ZDRAVSTVO. Kliničke medicinske znanosti.Intraabdominal Infections/epidemiologyAbdominal infectionMulticenter study3. Good healthManagementClinical trialCohort[SDV.MP.VIR]Life Sciences [q-bio]/Microbiology and Parasitology/VirologyCohort analysisCommunity acquired infectionCohort studyHumanmedicine.medical_specialtyCarbapenem resistanceCritical IllnessPeritoneal dialysisPeritonitisVancomycin resistant enterococcusMajor clinical studyPeritonitisArticle03 medical and health sciencesAntibiotic resistance[SDV.MHEP.CSC]Life Sciences [q-bio]/Human health and pathology/Cardiology and cardiovascular systemIntensive careSepsisSettore MED/41 - ANESTESIOLOGIAHumansCritical care medicineHospital infectionAgedScience & TechnologyLiver failureAntibiotic therapymedicine.disease[SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/BacteriologyEpidemiologic Studies030228 respiratory systemIntensive Care Unit; Sepsis (Diptera); Septic ShockRisk factorHuman medicineGeneral & internal medicineCongestive heart failureOriginalMultidrug resistanceCohort StudiesRisk FactorsCause of DeathEpidemiologyPrevalenceMedicine and Health SciencesAbdominal abscessSepsis/epidemiologyMiddle agedAntifungal therapy2. Zero hungerPeritonitiAntibiotic agentBiliary tract infectionIntensive care ; Intra-abdominal infection ; Mortality ; Multidrug resistance ; Peritonitis ; SepsisMiddle Aged:infecciones bacterianas y micosis::infección::infecciones intraabdominales [ENFERMEDADES]PREVALENCE:Infections::Sepsis [DISEASES]:técnicas de investigación::métodos epidemiológicos::características de los estudios epidemiológicos::estudios epidemiológicos::estudios de cohortes [TÉCNICAS Y EQUIPOS ANALÍTICOS DIAGNÓSTICOS Y TERAPÉUTICOS]Methicillin resistant staphylococcus aureusRaonament basat en casosFemaleCritically ill patientLife Sciences & BiomedicineAntifungal agentAdult:Investigative Techniques::Epidemiologic Methods::Epidemiologic Study Characteristics::Epidemiologic Studies::Cohort Studies [ANALYTICAL DIAGNOSTIC AND THERAPEUTIC TECHNIQUES AND EQUIPMENT]Predictive value:infecciones bacterianas y micosis::infección::sepsis [ENFERMEDADES]NOSepsisIntra-abdominal infectionCritical Care MedicineInternal medicineGeneral & Internal MedicinemedicineMANAGEMENTJournal Article[SDV.MP.PAR]Life Sciences [q-bio]/Microbiology and Parasitology/ParasitologySepticèmiaMortalitybusiness.industrySeptic shockPancreas diseaseMalnutrition030208 emergency & critical care medicineTyphlitisToxic megacolonIntensive careIntraabdominal InfectionsTherapyLate onset disorderbusiness
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Novel insights on [1,2]oxazolo[5,4‐e]isoindoles on multidrug resistant acute myeloid leukemia cell line

2022

A series of [1,2]oxazolo[5,4‐e]isoindole derivatives was evaluated against HL‐60 cell line and its multidrug resistance (MDR) variant, HL‐60R, resistant to doxorubicin and to other P‐gp substrates by overexpressing the efflux pump. They displayed antiproliferative activities, with IC50 values ranging from 0.02 to 5.5μM. In particular, the newly synthesized compound 4k produced synergistic effects in terms of cell growth inhibition and cell death induction either in combination with a Vinca alkaloid, Vinblastine, and a Taxane, Paclitaxel in HL‐60R cells. The study of the mechanism of action indicated that all compounds showed antimitotic activity through inhibition of tubulin polymerization.…

Leukemia Myeloid AcuteDrug Resistance Neoplasmantimitotic agents [12]oxazolo[54‐e]isoindoles multidrug resistanceDrug DiscoverySettore BIO/14 - FarmacologiaHumansAntineoplastic AgentsIsoindolesSettore CHIM/08 - Chimica FarmaceuticaDrug Resistance MultipleCell Line
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Expression and differential localization of xenobiotic transporters in the rat olfactory neuro-epithelium.

2011

International audience; Transporters, such as multidrug resistance P-glycoproteins (MDR), multidrug resistance-related proteins (MRP) and organic anion transporters (OATs), are involved in xenobiotic metabolism, particularly the cellular uptake or efflux of xenobiotics (and endobiotics) or their metabolites. The olfactory epithelium is exposed to both inhaled xenobiotics and those coming from systemic circulation. This tissue has been described as a pathway for xenobiotics to the brain via olfactory perineural space. Thereby, olfactory transporters and xenobiotic metabolizing enzymes, dedicated to the inactivation and the elimination of xenobiotics, have been involved in the toxicological p…

Male[ SDV.AEN ] Life Sciences [q-bio]/Food and NutritionMESH : Multidrug Resistance-Associated Proteinsp glycoproteinATP-binding cassette transporterMESH : HepatocytesReceptors OdorantMESH : P-GlycoproteinMESH: HepatocytesMESH : Lymphatic Vessels0302 clinical medicineMESH : Protein Transportugt2a1MESH: SmellMESH: Receptors OdorantMESH: AnimalsReceptorxenobiotic metabolizingmucosa0303 health sciencesMESH : Gene Expression RegulationMESH : RatsGeneral NeuroscienceMESH : OdorsMESH: Gene Expression RegulationSmellProtein Transportmedicine.anatomical_structureBiochemistryLivertransporterbarrierEffluxMultidrug Resistance-Associated ProteinsMESH: Multidrug Resistance-Associated ProteinsMESH: XenobioticsMESH: Protein TransportMESH: P-GlycoproteinMESH: RatsMESH: Lymphatic VesselsMESH : Maleodorant clearancebrainMESH : XenobioticsxenobioticBiologysystemMESH : Rats WistarOlfactory Receptor NeuronsXenobiotics03 medical and health sciencesbulbOlfactory Mucosamultidrug resistanceMESH : Receptors OdorantmedicineAnimalsATP Binding Cassette Transporter Subfamily B Member 1Rats WistardetoxificationMESH: Olfactory Mucosa030304 developmental biologyLymphatic VesselsMESH : Olfactory MucosaMESH: OdorsMESH : LiverTransporterMESH: Rats WistarMESH: Olfactory Receptor NeuronsEpitheliumMESH: MaleOlfactory bulbRatsenzymeGene Expression RegulationOdorantsHepatocytesMESH : SmellMESH : Olfactory Receptor NeuronsMESH : Animalsolfactory epitheliumOlfactory epitheliumperireceptor event[SDV.AEN]Life Sciences [q-bio]/Food and Nutrition030217 neurology & neurosurgeryDrug metabolismMESH: Liver
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Is the monoclonal spread of the ST258, KPC-3-producing clone being replaced in southern Italy by the dissemination of multiple clones of carbapenem-n…

2015

D. M. Geraci, C. Bonura, M. Giuffre, L. Saporito, G. Graziano, A. Aleo, T. Fasciana, F. Di Bernardo, T. Stampone, D. M. Palma and C. Mammina 1) Department of Sciences for Health Promotion and Mother-Child Care ‘G. D’Alessandro’, University of Palermo, 2) Postgraduate Specialty School in Hygiene and Preventive Medicine, University of Palermo, 3) Laboratory of Microbiology, General Hospital ARNAS ‘Civico, Di Cristina & Benfratelli’, 4) Laboratory of Microbiology, General Hospital Azienda Ospedaliera ‘Villa Sofia-V, Cervello’ and 5) II Intensive Care Unit, General Hospital ARNAS ‘Civico, Di Cristina & Benfratelli’, Palermo, Italy

Microbiology (medical)CarbapenemSettore MED/07 - Microbiologia E Microbiologia ClinicaKlebsiella pneumoniaeKPC Klebsiella pneumoniae epidemiology multidrug resistanceSettore MED/42 - Igiene Generale E Applicatabeta-Lactam Resistancebeta-LactamasesMicrobiologySettore MED/38 - Pediatria Generale E SpecialisticaBacterial ProteinsMedicineHumansGeneral hospitalbiologybusiness.industryGeneral Medicinebiology.organism_classificationKlebsiella InfectionsKlebsiella pneumoniaeInfectious DiseasesCarbapenemsItalybusinessHumanitiesmedicine.drugClinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases
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Bacterial contamination of inanimate surfaces and equipment in the intensive care unit.

2015

Intensive care unit (ICU)-acquired infections are a challenging health problem worldwide, especially when caused by multidrug-resistant (MDR) pathogens. In ICUs, inanimate surfaces and equipment (e.g., bedrails, stethoscopes, medical charts, ultrasound machine) may be contaminated by bacteria, including MDR isolates. Cross-transmission of microorganisms from inanimate surfaces may have a significant role for ICU-acquired colonization and infections. Contamination may result from healthcare workers' hands or by direct patient shedding of bacteria which are able to survive up to several months on dry surfaces. A higher environmental contamination has been reported around infected patients tha…

Pediatricsmedicine.medical_specialtyCritically illbusiness.industrymedia_common.quotation_subjectPatient contactEquipment contaminationSettore MED/41 - AnestesiologiaReviewContaminationMultidrug resistanceCritical Care and Intensive Care MedicineIntensive care unitlaw.inventionBacterial contamination; Equipment contamination; ICU; Multidrug resistancelawHygieneICUmedicineEquipment ContaminationMED/41 - ANESTESIOLOGIAIntensive care medicinebusinessBacterial contaminationmedia_common
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