Search results for " Ankylosing"

showing 10 items of 50 documents

Subclinical gut inflammation in ankylosing spondylitis

2015

Purpose of review Subclinical gut inflammation has been described in a significant proportion of patients with ankylosing spondylitis (AS), up to 10% of them developing it during the time of clinically overt inflammatory bowel disease. Histologic, immunologic, and intestinal microbiota alterations characterize the AS gut. Recent findings Microbial dysbiosis as well as alterations of innate immune responses have been demonstrated in the gut of AS. Furthermore, a growing body of evidence suggests that the gut of AS patients may be actively involved in the pathogenesis of AS through the production of proinflammatory cytokines, such as IL-23p19, and the differentiation of potentially pathogenic…

0301 basic medicineAnkylosing spondylitis; Gut inflammation; Innate lymphoid cells; Interleukin-17; Interleukin-23; Adaptive Immunity; Animals; Cytokines; Disease Models Animal; Dysbiosis; Gastrointestinal Microbiome; Humans; Immunity Innate; Inflammation; Inflammatory Bowel Diseases; Intestines; Macrophages; Mice; Spondylitis Ankylosing; Rheumatology; Medicine (all)MacrophageAdaptive ImmunityInterleukin-23Inflammatory bowel diseaseGastroenterologyMiceInterleukin 23InnateMedicineSubclinical infectionMedicine (all)Interleukin-17digestive oral and skin physiologyInnate lymphoid cellIntestineIntestinesCytokinesmedicine.symptomHumanAnkylosingmedicine.medical_specialtyDisease ModelInflammationdigestive system03 medical and health sciencesRheumatologyInternal medicineInnate lymphoid cellAnimalsHumansSpondylitis AnkylosingCytokineSpondylitisGut inflammationSpondylitiInflammationAnkylosing spondylitisAnimalbusiness.industryMacrophagesInflammatory Bowel DiseaseImmunityInflammatory Bowel Diseasesmedicine.diseaseImmunity InnateDysbiosiGastrointestinal MicrobiomeAnkylosing spondylitiDisease Models Animal030104 developmental biologyDysbiosisbusinessDysbiosisCurrent Opinion in Rheumatology
researchProduct

Autophagy in the pathogenesis of ankylosing spondylitis

2016

The pathogenesis of ankylosing spondylitis (AS) is not well understood, and treatment options have met with limited success. Autophagy is a highly conserved mechanism of controlled digestion of damaged organelles within a cell. It helps in the maintenance of cellular homeostasis. The process of autophagy requires the formation of an isolation membrane. They form double-membraned vesicles called “autophagosomes” that engulf a portion of the cytoplasm. Beyond the role in maintenance of cellular homeostasis, autophagy has been demonstrated as one of the most remarkable tools employed by the host cellular defense against bacteria invasion. Autophagy also affects the immune system and thus is im…

0301 basic medicineCellAutophagy-Related ProteinsATG16L1Cellular homeostasisInflammationBiologyLeucine-Rich Repeat Serine-Threonine Protein Kinase-2Pathogenesis03 medical and health sciencesImmune systemRheumatologyATG16L1; Autophagy; Inflammation; LRRK2; Pathogenesis; Spondyloarthritis; RheumatologyPathogenesiAutophagymedicineHomeostasisHumansSpondylitis AnkylosingATG16L1InflammationAutophagyLRRK2General MedicineCell biology030104 developmental biologymedicine.anatomical_structureCytoplasmSpondyloarthritimedicine.symptomClinical Rheumatology
researchProduct

Sclerostin and antisclerostin antibody serum levels predict the presence of axial spondyloarthritis in patients with inflammatory bowel disease

2018

Objective.The early diagnosis of inflammatory bowel disease (IBD)-associated spondyloarthritis (SpA/IBD) in patients affected by IBD represents a major topic in clinical practice; in particular, to date there are no available serum biomarkers revealing the presence of joint inflammation in these patients. Sclerostin (SOST), an antagonist of the Wnt/β-catenin pathway, and antisclerostin-immunoglobulin G (anti-SOST–IgG) have been recently studied in patients with ankylosing spondylitis (AS) as a putative marker of disease activity.Methods.SOST and anti-SOST-IgG serum levels were assayed in 125 patients with IBD, 85 with axial or peripheral SpA, and in control groups (patients with AS and rheu…

0301 basic medicineMaleAntibodieAntigen-Antibody ComplexInflammatory bowel diseaseGastroenterologyPathogenesischemistry.chemical_compound0302 clinical medicineGenetic MarkerImmunology and AllergyProspective StudiesMultivariate AnalysibiologyWnt signaling pathwayMiddle AgedRheumatoid arthritisBone Morphogenetic ProteinsRegression AnalysisFemalemedicine.symptomAntibodyHumanGenetic MarkersAdultmedicine.medical_specialtySclerostinImmunologyInflammationAntibodiesRegression AnalysiStatistics Nonparametric03 medical and health sciencesRheumatologyInternal medicineSpondyloarthritismedicineHumansSpondylitis AnkylosingAdaptor Proteins Signal TransducingAntisclerostin Antibodie030203 arthritis & rheumatologyAnkylosing spondylitisbusiness.industryBone Morphogenetic ProteinInflammatory Bowel DiseaseBiomarkerInflammatory Bowel Diseasesmedicine.diseaseProspective StudieSettore MED/16 - Reumatologia030104 developmental biologychemistryROC CurveImmunoglobulin GMultivariate Analysisbiology.proteinSclerostinSpondyloarthritibusinessBiomarkers
researchProduct

Inflammasome activation in Ankylosing Spondylitis is associated to gut dysbiosis

2021

Objective: We undertook this study to evaluate the activation and functional relevance of inflammasome pathways in ankylosing spondylitis (AS) patients and rodent models and their relationship to dysbiosis. Methods: An inflammasome pathway was evaluated in the gut and peripheral blood from 40 AS patients using quantitative reverse transcriptase–polymerase chain reaction (qRT-PCR), immunohistochemistry (IHC), flow cytometry, and confocal microscopy, and was compared to that of 20 healthy controls and 10 patients with Crohn’s disease. Bacteria was visualized using silver stain in human samples, and antibiotics were administered to HLA–B27–transgenic rats. The NLRP3 inhibitor MCC950 was admini…

0301 basic medicineMaleInflammasomesmedicine.medical_treatmentInterleukin-1betaInterleukin-23Mice0302 clinical medicineCrohn DiseaseNLRC4Interleukin 23Immunology and AllergyIleitisHLA-B27 AntigenSulfonamidesReverse Transcriptase Polymerase Chain ReactionCaspase 1Interleukin-17Interleukin-18InflammasomeIleitisMiddle AgedImmunohistochemistryAnti-Bacterial AgentsDNA-Binding ProteinsCytokineIndenesFemaleInterleukin 17Rats Transgenicmedicine.drugAdultAdolescentImmunologyReceptors Cell Surface03 medical and health sciencesAIM2Young AdultRheumatologyIleumNLR Family Pyrin Domain-Containing 3 ProteinmedicineAnimalsHumansSpondylitis AnkylosingFurans030203 arthritis & rheumatologybusiness.industryCalcium-Binding Proteinsmedicine.diseaseGastrointestinal MicrobiomeRatsCARD Signaling Adaptor Proteins030104 developmental biologyCase-Control StudiesImmunologyDysbiosisJointsbusinessDysbiosis
researchProduct

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.)
researchProduct

No diagnostic utility of antibody patterns against Klebsiella pneumoniae capsular serotypes in patients with axial spondyloarthritis vs. patients wit…

2017

OBJECTIVES: To investigate whether antibody response patterns against Klebsiella pneumoniae capsular serotypes can discriminate patients with axial spondyloarthritis (axSpA) from patients with non-specific low back pain (LBP).METHOD: Immunoglobulin (Ig)G and IgA antibodies against K. pneumoniae capsular serotypes K2, K26, K36, and K50 were measured, and antibody seropositivity compared between groups and analysed for patient correlation in five different groups: (a) 96 patients fulfilling the Assessment of SpondyloArthritis International Society (ASAS) classification criteria for axSpA; (b) 38 patients with either a positive magnetic resonance imaging (MRI) scan as defined by ASAS or a posi…

0301 basic medicineSerotypeMaleCross-sectional studyKlebsiella pneumoniaeDenmarkGastroenterology0302 clinical medicineImmunology and AllergyHLA-B27 Antigenbiologymedicine.diagnostic_testGeneral MedicineLow back painAntibodies BacterialMagnetic Resonance ImagingKlebsiella pneumoniaeC-Reactive ProteinFemaleAntibodymedicine.symptomAdultmedicine.medical_specialtyAdolescentImmunologyHuman leukocyte antigenSerogroup03 medical and health sciencesYoung AdultRheumatologyInternal medicineJournal ArticlemedicineHumansSpondylitis AnkylosingLow back painSacroiliitisBacterial Capsules030203 arthritis & rheumatologyAnkylosing spondylitisbusiness.industryta1182Magnetic resonance imagingaxial spondyloarthritismedicine.diseasebiology.organism_classificationantibody response patternsImmunoglobulin A030104 developmental biologyCase-Control StudiesImmunoglobulin GImmunologybiology.proteinSpondylarthropathiesbusinessLow Back Pain
researchProduct

IL-17 for therapy.

2017

The cytokine IL-17 is now a target for an array of therapeutic monoclonal antibodies supposed to treat a variety of inflammatory diseases. The forerunner Secukinumab, an IL-17A neutralizing antibody, is meanwhile approved as first-line treatments for moderate-to-severe plaque psoriasis, and as second-line treatment for psoriatic arthritis and ankylosing spondylitis. Ixekizumab and Brodalumab, both also targeting the IL-17 pathway, were also recently approved by the FDA for plaque psoriasis. Using mice overexpressing IL-17A in a tissue of choice, we showed that the ectopic expression of this cytokine in keratinocytes resulted in a spontaneous and very strong form of psoriasis-like dermatitis…

0301 basic medicinemedicine.drug_classBrodalumabDermatitisMice TransgenicDermatologyMonoclonal antibodymedicine.disease_causeAntibodies Monoclonal HumanizedBiochemistryAutoimmunity03 medical and health sciencesPsoriatic arthritisMice0302 clinical medicinePsoriasisMedicineAnimalsHumansPsoriasisSpondylitis AnkylosingMolecular Targeted TherapyMolecular BiologySkinbusiness.industryInterleukin-17Antibodies Monoclonalmedicine.diseaseIxekizumabDisease Models Animal030104 developmental biologyImmunologySecukinumabInterleukin 17business030215 immunologySignal TransductionJournal of dermatological science
researchProduct

Expression of host defense scavenger receptors in spondylarthropathy

2001

Objective Reactive arthritis (ReA) is postulated to be caused by a defective host defense against gram-negative bacteria. HLA–B27 could play a role in this process, but does not account for the many HLA–B27 negative patients. The objective of this study was to test the expression of 3 macrophage scavenger receptors (SRs) that are responsible for innate immunity against gram-negative bacteria: SR class A type I (SR-AI), SR-AII, and the macrophage receptor with collagenous structure (MARCO). We postulate that defects in such receptors might also contribute to the host risk factors that increase the predisposition to ReA and perhaps other subtypes of spondylarthropathy (SpA). Methods Periphera…

AdultCD36 AntigensMalemusculoskeletal diseasesCellular immunityAdolescentInflammatory arthritisImmunologyPeripheral blood mononuclear cellArthritis ReactiveImmune systemRheumatologyProhibitinsSynovial FluidmedicineImmunology and AllergySynovial fluidHumansPharmacology (medical)Spondylitis AnkylosingRNA MessengerScavenger receptorReceptors ImmunologicDNA PrimersReceptors LipoproteinReceptors Scavengerbusiness.industryReverse Transcriptase Polymerase Chain ReactionMacrophagesSynovial MembraneMembrane ProteinsScavenger Receptors Class AMiddle AgedScavenger Receptors Class Bmedicine.diseaseMacrophage receptor with collagenous structuremedicine.anatomical_structureImmunologySalmonella InfectionsLeukocytes MononuclearFemaleSynovial membranebusinessArthritis and rheumatism
researchProduct

CD4+ and CD8+ clonal T cell expansions indicate a role of antigens in ankylosing spondylitis; a study in HLA-B27+ monozygotic twins.

2001

SUMMARYAnkylosing spondylitis (AS) is a complex genetic disease in which both MHC and non-MHC genes determine disease susceptibility. To determine whether the T cell repertoires of individuals with AS show signs of increased stimulation by exogenous antigens, CD4+ and CD8+ T cell subsets of five monozygotic HLA-B27+ twins (two concordant and three discordant for AS) and CD8+ T cell repertoires of three healthy HLA-B27+ individuals were characterized by TCR β-chain (TCRB) CDR3 size spectratyping. Selected TCRB-CDR3 spectra were further analysed by BJ-segment analysis and TCRB-CDR3 from expanded T cell clones were sequenced. In an analysis of all data (519/598 possible TCRB-CDR3 spectra), AS …

AdultCD4-Positive T-LymphocytesT cellImmunologyNeuroimmunologyReceptors Antigen T-CellTwinsMonozygotic twinchemical and pharmacologic phenomenaBiologyCD8-Positive T-LymphocytesMajor histocompatibility complexAntigenmedicineImmunology and AllergyHumansSpondylitis AnkylosingHLA-B27 AntigenAgedHLA-B27T-cell receptorCell DifferentiationT lymphocyteMiddle Agedmedicine.anatomical_structureImmunologybiology.proteinCD8Clinical and experimental immunology
researchProduct

A 588-gene microarray analysis of the peripheral blood mononuclear cells of spondyloarthropathy patients

2002

OBJECTIVES: To identify genes which are more highly expressed in the peripheral blood mononuclear cells (PBMC) of patients with spondyloarthropathy (SpA), rheumatoid arthritis (RA) and psoriatic arthritis (PsA), in comparison to normal subjects. METHODS: A 588-gene microarray was used as a screening tool to select a panel of such genes from PBMC of these subjects and of normal subjects. Results were then validated by reverse transcription-polymerase chain reaction (RT-PCR). RESULTS: The following genes were more highly expressed in arthritis patients than in normal subjects: macrophage differentiation marker MNDA (myeloid nuclear differentiation antigen), MRP8 and MRP14 (migratory inhibitor…

AdultGenetic MarkersMaleCCR1Receptors CXCR4AdolescentSpondyloarthropathyArthritisPeripheral blood mononuclear cellArthritis RheumatoidPsoriatic arthritisRheumatologymedicineHumansSpondylitis AnkylosingPharmacology (medical)AgedOligonucleotide Array Sequence AnalysisReverse Transcriptase Polymerase Chain Reactionbusiness.industryJanus kinase 3Arthritis PsoriaticSynovial MembraneMNDAInterleukinDNAMiddle Agedmedicine.diseaseAntigens DifferentiationChemokine CXCL12ImmunologyLeukocytes MononuclearFemalebusinessChemokines CXCRheumatology (Oxford, England)
researchProduct