Search results for "Harmane"

showing 3 items of 3 documents

Immunoproteasome LMP2 60HH Variant Alters MBP Epitope Generation and Reduces the Risk to Develop Multiple Sclerosis in Italian Female Population

2010

BackgroundAlbeit several studies pointed out the pivotal role that CD4+T cells have in Multiple Sclerosis, the CD8+ T cells involvement in the pathology is still in its early phases of investigation. Proteasome degradation is the key step in the production of MHC class I-restricted epitopes and therefore its activity could be an important element in the activation and regulation of autoreactive CD8+ T cells in Multiple Sclerosis.Methodology/principal findingsImmunoproteasomes and PA28-alphabeta regulator are present in MS affected brain area and accumulated in plaques. They are expressed in cell types supposed to be involved in MS development such as neurons, endothelial cells, oligodendroc…

MaleT cells proteasomes multiple sclerosis parietal lobeMuscle ProteinsImmunoproteasomeEpitopeEpitopesGene FrequencyRisk FactorsCytotoxic T cellFunding: This work was financed in part by the grant Giovani Ricercatori 2007 from Italian Ministry of Health to MM DG and FMB by a grant from the European Commission Integrated Project PROTEOMAGE (FP6) to CF by the finalized projects of Fondazione Italiana Sclerosi Multipla (FISM) cod. 2003/R26 and BioPharmaNet to CF and 2002/R/40 and 2005/R/10 2008/R/11 (Genoa) to SD'A by the University of Bologna (FRO) to MPF by the Regione Piemonte (Ricerca Sanitaria Finalizzata Project and Ricerca Sanitaria Applicata-CIPE Project) to SD'A by Associazione Amici del Centro Dino Ferrari and IRCCS Ospedale Maggiore Policlinico Milano to DG and by the grants Sonderforschungsbereich (SFB-507 SFB-421) to PMK and US the grants TR43 and Neurocure to PMK. MM benefited from the A.V. Humboldt PostDoc fellowship. The funders had no role in study design data collection and analysis decision to publish or preparation of the manuscript.MultidisciplinaryMicrogliaQRBrainMiddle AgedImmunohistochemistryCysteine EndopeptidasesOligodendrogliamedicine.anatomical_structureItalyImmunoproteasome; multiple sclerosis; italian populationmultiple sclerosiImmunology/Antigen Processing and RecognitionMedicineFemaleMicrogliaNeuroscience/Neurobiology of Disease and RegenerationResearch ArticleProtein BindingAdultProteasome Endopeptidase ComplexMultiple SclerosisGenotypeScienceMolecular Sequence DataImmunology/AutoimmunityBiologySex FactorsMHC class IHLA-A2 AntigenmedicineHumansAmino Acid SequenceAlleleHLA-A AntigensMultiple sclerosisMacrophagesMyelin Basic Proteinmedicine.diseaseMyelin basic proteinImmunologybiology.proteinitalian populationCD8PLoS ONE
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1-Methyl-?-carboline (Harmane), a potent endogenous inhibitor of benzodiazepine receptor binding

1980

The interaction of several beta-carbolines with specific [3H]-flunitrazepam binding to benzodiazepine receptors in rat brain membranes was investigated. Out of the investigated compounds, harmane and norharmane were the most potent inhibitors of specific [3H]-flunitrazepam binding, with IC50-values in the micromolar range. All other derivatives, including harmine, harmaline, and several tetrahydroderivatives were at least ten times less potent. Harmane has been previously found in rat brain and human urine, so it is the most potent endogenous inhibitor of specific [3H]-flunitrazepam binding known so far, with a several fold higher affinity for the benzodiazepine receptor than inosine and hy…

Receptors DrugFlunitrazepamIn Vitro TechniquesPharmacologyRetinachemistry.chemical_compoundHarmalineAlkaloidsHarminemedicineAnimalsHarmaneInosineBenzodiazepine receptor bindingBrain ChemistryPharmacologybeta-CarbolineGABAA receptormusculoskeletal neural and ocular physiologyGeneral MedicineReceptors GABA-ARatsHarmineKineticschemistryBiochemistryCattleFlunitrazepammedicine.drugNaunyn-Schmiedeberg's Archives of Pharmacology
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Photosensitization of DNA by β-carbolines: Kinetic analysis and photoproduct characterization

2012

β-Carbolines (βCs) are a group of alkaloids present in many plants and animals. It has been suggested that these alkaloids participate in a variety of significant photosensitized processes. Despite their well-established natural occurrence, the main biological role of these alkaloids and the mechanisms involved are, to date, poorly understood. In the present work, we examined the capability of three important βCs (norharmane, harmane and harmine) and two of its derivatives (N-methyl-norharmane and N-methyl-harmane) to induce DNA damage upon UV-A excitation, correlating the type and extent of the damage with the photophysical characteristics and DNA binding properties of the compounds. The r…

chemistry.chemical_classificationReactive oxygen speciesPhotosensitizing AgentsMolecular StructurebiologySuperoxideSinglet oxygenDNA damageStereochemistryOrganic ChemistryPyrimidine dimerDNAPhotochemical ProcessesBiochemistrySuperoxide dismutaseKineticschemistry.chemical_compoundHarminechemistrybiology.proteinPhysical and Theoretical ChemistryHarmaneReactive Oxygen SpeciesCarbolinesThymidineOrganic & Biomolecular Chemistry
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