Arthritis, RheumatoidAntirheumatic AgentsSynovial FluidSynovial MembraneRheumatoid FactorOsteoarthritisHLA-DRB1 ChainsCitrullineSynovitisPeptides, CyclicMethotrexateJointsSeverity of Illness IndexMetacarpophalangeal JointTumor Necrosis Factor-alphaAutoantibodiesHLA-DR AntigensArthrographyBlood SedimentationCD4-Positive T-LymphocytesFoot JointsAntibodies, MonoclonalImmunoglobulin GLymphocyte ActivationCells, CulturedCase-Control StudiesBiological MarkersWrist JointT-LymphocytesCytokinesReceptors, Tumor Necrosis FactorHLA-DR4 AntigenRheumatologyHand JointsEnzyme-Linked Immunosorbent AssaySpondylarthropathiesOrganogold CompoundsT-Lymphocyte SubsetsLeukocytes, MononuclearAutoantigensArthritis, PsoriaticSpondylitis, AnkylosingFlow CytometryFinger JointTreatment OutcomeArthritisAntibodies, Monoclonal, HumanizedCohort StudiesCD8-Positive T-LymphocytesB-LymphocytesDisease ProgressionGenotypeArthritis, ReactiveInterleukin-17Antigens, CDInterleukin-6SulfasalazineArthritis, ExperimentalInterleukin 1 Receptor Antagonist ProteinGenetic Predisposition to DiseaseLupus Erythematosus, SystemicImmunophenotypingTenosynovitisInterferon-gammaFibroblastsAllelesDisability EvaluationTarsal JointsC-Reactive ProteinCell DifferentiationMice, Inbred C57BLDrug Therapy, CombinationImmunoglobulin MDendritic CellsIsoxazolesAntigens, CD45Th17 CellsTime FactorsRNA, MessengerGlucocorticoidsEpitopesAntibodies, Monoclonal, Murine-DerivedRheumatoid NodulePolymorphism, Single NucleotideAntigens, CD28Autoimmune DiseasesInterleukinsProtein Tyrosine Phosphatase, Non-Receptor Type 22Interleukin-4Collagen Type IIReverse Transcriptase Polymerase Chain ReactionHLA-DR7 AntigenMonocytesRheumatic DiseasesLymphocyte CountT-Lymphocytes, RegulatoryB-Lymphocyte SubsetsInflammationTretinoinRisk Factors