Search results for " HLA"

showing 10 items of 36 documents

KIR2DL3 and the KIR ligand groups HLA-A-Bw4 and HLA-C2 predict the outcome of hepatitis B virus infection.

2017

Killer immunoglobulin-like receptors (KIRs) regulate the activation of Natural Killer cells through their interaction with human leukocyte antigens (HLA). KIR and HLA loci are highly polymorphic and certain HLA-KIR combinations have been found to protect against viral infections. In this study we analyzed whether the KIR/HLA repertoire may influence the course of hepatitis B virus (HBV) infection. Fifty-seven subjects with chronic hepatitis B (CHB), 44 subjects with resolved HBV infection, and 60 healthy uninfected controls (HC) were genotyped for KIR and their HLA ligands. The frequency of the HLA-A-Bw4 ligand group was higher in CHB (58%) than subjects with resolved infection (23%) (crude…

0301 basic medicineAdultMaleSettore MED/09 - Medicina InternaGenotypeSettore MED/17 - Malattie InfettiveKIR LigandHuman leukocyte antigenHLA-C AntigensBiologymedicine.disease_cause03 medical and health sciencesYoung Adult0302 clinical medicineHepatitis B ChronicVirologymedicineHumansGenetic Predisposition to DiseaseAlleleReceptorGeneAgedSettore MED/04 - Patologia GeneraleHepatitis B virusHepatologyHLA-A AntigensMiddle AgedVirologyHLA-AKIRs HLAA HBV030104 developmental biologyInfectious DiseasesTreatment OutcomeHLA-B AntigensReceptors KIR2DL3ImmunologyFemalePredictive variables030215 immunology
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Brief Report: Functional Interaction of Endoplasmic Reticulum Aminopeptidase 2 and HLA-B27 Activates the Unfolded Protein Response.

2017

Objective: The basic mechanisms underlying the pathogenesis of ankylosing spondylitis (AS) remain unresolved. We previously reported an association of the single-nucleotide polymorphism (SNP) rs2549782 in the endoplasmic reticulum aminopeptidase 2 gene (ERAP2) with AS. It is known that patients homozygous for the G allele (GG) of another ERAP2 SNP, rs2248374, lack expression of ERAP2 (ERAP2 null). The present study utilized this information to study the impact of ERAP2 deficiency on HLA–B27 expression in patients with AS, specifically focusing on the functional interaction of ERAP2 and HLA–B27 in peripheral blood mononuclear cells (PBMCs) from patients with AS and assessing the effects …

0301 basic medicineMaleX-Box Binding Protein 1Aminopeptidases0302 clinical medicineImmunology and AllergyRNA Small InterferingEndoplasmic Reticulum Chaperone BiPHLA-B27 AntigenHeat-Shock ProteinsAlleleBlottingReverse Transcriptase Polymerase Chain ReactionHeat-Shock ProteinSingle NucleotideMiddle AgedFlow CytometryCCAAT-Enhancer-Binding Protein3. Good healthUp-RegulationFemaleWesternHumanAnkylosingAdultAminopeptidaseMononuclearImmunologyBlotting WesternSingle-nucleotide polymorphismBiologyMajor histocompatibility complexSmall InterferingPolymorphism Single NucleotideAdult; Alleles; Aminopeptidases; Blotting Western; CCAAT-Enhancer-Binding Proteins; Cell Line; Female; Flow Cytometry; HLA-B27 Antigen; Heat-Shock Proteins; Humans; Leukocytes Mononuclear; Male; Middle Aged; Polymorphism Single Nucleotide; RNA Small Interfering; Reverse Transcriptase Polymerase Chain Reaction; Spondylitis Ankylosing; Unfolded Protein Response; Up-Regulation; X-Box Binding Protein 1; Immunology and Allergy; Rheumatology; ImmunologyCell Line03 medical and health sciencesDownregulation and upregulationRheumatologyHumansSpondylitis AnkylosingAllelePolymorphismAlleles030203 arthritis & rheumatologySpondylitiHLA-B27LeukocyteEndoplasmic reticulum aminopeptidase 2X-Box Binding Protein 1Molecular biologySettore MED/16 - Reumatologia030104 developmental biologyUnfolded protein responsebiology.proteinCCAAT-Enhancer-Binding ProteinsLeukocytes MononuclearUnfolded Protein ResponseRNAArthritisrheumatology (Hoboken, N.J.)
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Myositis/myasthenia after pembrolizumab in a bladder cancer patient with an autoimmunity-associated HLA: Immune–biological evaluation and case report

2021

Pembrolizumab (mAb to PD-1) has been recently approved for the therapy of pretreated urothelial cancer. Despite the efficacy, it is often accompanied by unpredictable and sometime severe immune-related (ir) adverse events (AEs). Here, we report the clinical and immune–biological characterization of a patient with a metastatic bladder cancer who developed myositis signs (M) and a myasthenia-like syndrome (MLS) during treatment with pembrolizumab. The patient presented an autoimmunity-associated HLA haplotype (HLA-A*02/HLA-B*08/HLA-C*07/HLA-DRB1*03) and experienced an increase in activated CD8 T-cells along the treatment. The symptomatology regressed after pembrolizumab discontinuation and a …

0301 basic medicineOncologyMaleCase ReportAutoimmunityPembrolizumabPD1-checkpoint inhibitorsmedicine.disease_causeAutoimmunity0302 clinical medicineAntineoplastic Agents ImmunologicalBiology (General)HLA AntigenMyositiPD1-checkpoint inhibitorSpectroscopyMyositisGeneral MedicineComputer Science ApplicationsMyasthenia GraviChemistryPyridostigmineurothelial cancer030220 oncology & carcinogenesisUrinary Bladder NeoplasmClass-I/II HLAMyastheniamedicine.drugHumanmedicine.medical_specialtyQH301-705.5PrognosiHuman leukocyte antigenAntibodies Monoclonal HumanizedCatalysisInorganic Chemistry03 medical and health sciencesInternal medicinemedicinePhysical and Theoretical ChemistryAdverse effectMolecular BiologyQD1-999Agedbusiness.industryOrganic ChemistryCancermedicine.diseaseDiscontinuation030104 developmental biologybusiness
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HLA-E-Restricted CD8+ T Lymphocytes Efficiently Control Mycobacterium tuberculosis and HIV-1 Co-Infection

2020

We investigated the contribution of human leukocyte antigen A2 (HLA-A2) and HLA-E-restricted CD8+ T cells in patients with Mycobacterium tuberculosis and human immunodeficiency virus 1 (HIV-1) coinfection. HIV-1 downregulates HLA-A, -B, and -C molecules in infected cells, thus influencing recognition by HLA class I-restricted CD8+ T cells but not by HLA-E-restricted CD8+ T cells, owing to the inability of the virus to downmodulate their expression. Therefore, antigen-specific HLA-E-restricted CD8+ T cells could play a protective role in Mycobacterium tuberculosis and HIV-1 coinfection. HLA-E- and HLA-A2-restricted Mycobacterium tuberculosis-specific CD8+ T cells were tested in vitro for cyt…

0301 basic medicinePulmonary and Respiratory MedicineAdultMaleTetramersTuberculosisHLA-EClinical BiochemistryT lymphocytesDown-RegulationHIV InfectionsHuman leukocyte antigenCD8-Positive T-Lymphocytes+Lymphocyte ActivationMycobacterium tuberculosis03 medical and health sciences0302 clinical medicineAntigenHLA-A2 AntigenmedicineCytotoxic T cellHumansTuberculosisLymphocyte CountMolecular BiologyAntigens BacterialbiologyCoinfectionHistocompatibility Antigens Class ICD8 T lymphocytes HLA-E Mycobacterium tuberculosis HIV tetramersCell BiologyCD8Mycobacterium tuberculosisMiddle Agedbiology.organism_classificationmedicine.diseaseVirology030104 developmental biology030228 respiratory systemCoinfectionHIV-1FemaleCD8Mycobacterium
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HLA and killer cell immunoglobulin-like receptor (KIRs) genotyping in patients with acute viral encephalitis

2018

// Antonino Tuttolomondo 1 , Claudia Colomba 2 , Danilo Di Bona 6 , Alessandra Casuccio 4 , Domenico Di Raimondo 1 , Giuseppe Clemente 1 , Valentina Arnao 5 , Rosaria Pecoraro 1 , Paolo Ragonese 5 , Anna Aiello 3 , Giulia Accardi 3 , Rosario Maugeri 5 , Carlo Maida 1 , Irene Simonetta 1 , Vittoriano Della Corte 1 , Domenico Gerardo Iacopino 5 , Calogero Caruso 3 , Antonio Cascio 2 and Antonio Pinto 1 on behalf of KIRIIND (KIR Infectious and Inflammatory Diseases) Collaborative Group 1 U.O.C di Medicina Interna con Stroke Care, Dipartimento Biomedico di Medicina Interna e Specialistica (Di.Bi.M.I.S), Universita degli Studi di Palermo, Palermo, Italy 2 U.O.C di Malattie Infettive, Dipartiment…

0301 basic medicineSettore MED/09 - Medicina InternaencephalitisKiller-cell immunoglobulin-like receptorHuman leukocyte antigenAcute viral encephalitis03 medical and health sciences0302 clinical medicineEncephalitimedicineIn patientGenotypingSettore MED/04 - Patologia Generalebusiness.industryHaplotypemedicine.diseaseVirologyKIRHLA030104 developmental biologyEncephalitis; HLA; KIRs; OncologyOncologybusinessKIR3DL1KIRs030217 neurology & neurosurgeryEncephalitisResearch Paper
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Mortality in COVID-19 disease patients: Correlating Association of Major histocompatibility complex (MHC) with severe acute respiratory syndrome 2 (S…

2020

Highlights • In addition to ethnicity, socio-economic factors, prior vaccinations and exposure to other coronaviruses, other factors need to be considered to explain geographical and regional variations in susceptibility, severity of clinical expression of COVID-19 disease and outcomes. • Differences in peptide binding of SARS-CoV-2 variants to MHC class II, but not to MHC class I alleles frequent in individuals with African, Asian or Caucasian descent could be identified. • Single mutations in the wildtype of SARS-CoV-2, the so called B strain or L strain impact on MHC presentation • Most likely there is selective pressure from MHC class II alleles in regard to binding of the ORF8 (L84S) v…

0301 basic medicinecross-reactivityMHC bindingPeptide bindingmedicine.disease_causeAutoimmunity0302 clinical medicine030212 general & internal medicineMutationepitopeautoimmunityGeneral MedicineHLAEuropeviral variantsInfectious DiseasesCoronavirus InfectionsPeptides ; COVID-19 ; Disease association ; Cross-reactivity ; MHC ; T-cells ; Autoimmunity ; Epitope ; Cytokines ; Viral variants ; HLA ; SARS ; SARS-CoV-2 ; MHC bindingMicrobiology (medical)Asia030106 microbiologyPneumonia ViralHuman leukocyte antigenBiologyMajor histocompatibility complexArticlelcsh:Infectious and parasitic diseases03 medical and health sciencesBetacoronavirusMHC class ImedicineHumanslcsh:RC109-216AllelePandemicsAllelesSARSMHC class IISARS-CoV-2T-cellsdisease associationHistocompatibility Antigens Class IHistocompatibility Antigens Class IICOVID-19cytokinesImmunologyAfricabiology.proteinpeptidesMHCInternational Journal of Infectious Diseases
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Frequency and clinical aspects of neurological and psychiatric symptoms in patients with non-celiac wheat sensitivity

2021

Background: Non-Celiac Wheat Sensitivity (NCWS) is characterized by both intestinal and extra-intestinal symptoms. The study aims to investigate the frequency of neuropsychiatric manifestations in NCWS patients and identify their clinical and demographic characteristics. Methods: 278 clinical records of NCWS patients, diagnosed by a double-blind placebo-controlled wheat challenge between 2006 and 2020, were retrospectively revised. Fifty-two patients with Celiac Disease (CD) and 54 patients with Irritable Bowel Syndrome (IBS) served as controls. Results: 87% of the NCWS patients had an IBS-like clinical presentation. The NCWS group showed a longer duration of symptoms, a higher frequency of…

0301 basic medicineduodenal lymphocytosisAdultMalemedicine.medical_specialtyLymphocytosisnon-celiac wheat sensitivityDiseaseWheat HypersensitivityGastroenterologyArticleDuodenal lymphocytosis HLA Irritable bowel syndrome Multiple food hypersensitivity Neuropsychiatric symptoms Non-celiac wheat sensitivity Adult Celiac Disease Female Humans Irritable Bowel Syndrome Male Nervous System Diseases Wheat HypersensitivityIrritable Bowel Syndrome03 medical and health sciences0302 clinical medicineInternal medicinemedicineIngestionHumansIn patientTX341-641multiple food hypersensitivityIrritable bowel syndromeNutrition and Dieteticsbusiness.industryNutrition. Foods and food supplymedicine.diseaseWheat hypersensitivityHLACeliac Disease030104 developmental biologyDuodenal mucosa030211 gastroenterology & hepatologyneuropsychiatric symptomsFemalemedicine.symptomNervous System DiseasesbusinessClinical recordFood Science
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Genome-based in silico identification of new Mycobacterium tuberculosis antigens activating polyfunctional CD8+ T cells in human tuberculosis.

2011

Although CD8(+) T cells help control Mycobacterium tuberculosis infection, their M. tuberculosis Ag repertoire, in vivo frequency, and functionality in human tuberculosis (TB) remains largely undefined. We have performed genome-based bioinformatics searches to identify new M. tuberculosis epitopes presented by major HLA class I supertypes A2, A3, and B7 (covering 80% of the human population). A total of 432 M. tuberculosis peptides predicted to bind to HLA-A*0201, HLA-A*0301, and HLA-B*0702 (representing the above supertypes) were synthesized and HLA-binding affinities determined. Peptide-specific CD8(+) T cell proliferation assays (CFSE dilution) in 41 M. tuberculosis-responsive donors ide…

AdultIntracellular FluidMaleTuberculosisT cellImmunologyEpitopes T-LymphocyteHuman leukocyte antigenCD8-Positive T-LymphocytesLymphocyte ActivationEpitopeTuberculosis CD8 T cells cytokinesMycobacterium tuberculosis03 medical and health sciencesAntigenifn-gamma protective efficacy binding-affinity dormancy regulon subunit vaccine transgenic mice hla-b epitopes infection responsesPredictive Value of TestsmedicineImmunology and AllergyCytotoxic T cellHumansTuberculosis030304 developmental biologyAged0303 health sciencesAntigens Bacterialbiology030306 microbiologyGenome HumanComputational BiologyMycobacterium tuberculosisMiddle Agedbiology.organism_classificationmedicine.diseaseVirology3. Good healthmedicine.anatomical_structureFemaleCD8Genome BacterialJournal of immunology (Baltimore, Md. : 1950)
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HLA Class I and Class II Polymorphism in Three Sicilian Populations

2007

Two human leukocyte antigen (HLA) class I loci (HLA-A and HLA-B) and one class II locus (HLA-DR) were typed at the DNA level in the Sicilian population. Study participants were of Sicilian origin (183 for class I loci and 260 for class II loci) and live in three towns, chosen on the basis of geographic position and different historical events. These towns are Sciacca (southwest Sicily, located at sea level, conquered by Arabs in a.d. 814), Piana degli Albanesi (northwest Sicily, 720 m above sea level, has maintained religious, cultural, and linguistic peculiarities traced to Albanian settlement in 1488), and Troina (northeast Sicily, 1,120 m above sea level, known as the first settlement of…

AdultMalePopulationLocus (genetics)Human leukocyte antigenLinkage DisequilibriumGene FrequencyGeneticsHumansAlleleeducationSicilyAllele frequencyAllelesGenetics (clinical)Ecology Evolution Behavior and Systematicseducation.field_of_studyPolymorphism GeneticHLA-A AntigensGenetic VariationHLA-DR Antigenslanguage.human_languageGenetics PopulationHaplotypesHLA-B AntigensChild PreschoolGenetic structurelanguageEthnologyFemalePhoenicianDNA typing haplotype frequency HLA polymorphism sicilian populationSicilianHLA-DRB1 ChainsDemographyHuman Biology
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CC chemokine receptor 5 polymorphism in Italian patients with Beḩet's disease

2012

OBJECTIVE: To evaluate the potential role of CC chemokine receptor 5 (CCR5)Δ32 polymorphism in the susceptibility to and clinical expression of Behcet's disease (BD) in a cohort of Italian patients. METHODS: One hundred and ninety-six consecutive Italian patients satisfying the ISG criteria for BD were followed up for 8 years, and 180 healthy age- and sex-matched blood donors were molecularly genotyped for the CCR5Δ32 polymorphism. A standard microlymphocytotoxicity technique was used to serotype HLA-B51. The patients were subgrouped on the basis of the presence or absence of clinical manifestations. RESULTS: The distribution of the CCR5Δ32 genotype differed between BD patients and controls…

AdultMalemedicine.medical_specialtyHeterozygoteReceptors CCR5Behcet's disease CCR5 polymorphismBehcet's diseaseGastroenterologyRheumatologyGeneticGene FrequencyInternal medicineGenotypeReceptorsMedicineHumansPharmacology (medical)Genetic Predisposition to DiseaseAllelePolymorphismAllele frequencyPolymorphism Geneticbusiness.industryBehcet SyndromeHomozygoteCase-control studyOdds ratiomedicine.diseaseBeḩet's disease; CC chemokine receptor 5 Δ32 olymorphism; Chemokines; Disease manifestations; Adult; Behcet Syndrome; Case-Control Studies; Female; Gene Frequency; Genetic Predisposition to Disease; HLA-B Antigens; Heterozygote; Homozygote; Humans; Italy; Male; Polymorphism Genetic; Receptors CCR5; Rheumatology; Pharmacology (medical)Adult; Behcet Syndrome; Case-Control Studies; Female; Gene Frequency; Genetic Predisposition to Disease; HLA-B Antigens; Heterozygote; Homozygote; Humans; Italy; Male; Polymorphism Genetic; Receptors CCR5ItalyHLA-B AntigensCase-Control StudiesImmunologyCohortFemalebusinessCC chemokine receptorsCCR5
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