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OBJECTIVE: To assess the safety, tolerability, pharmacokinetics, and efficacy of rituximab (RTX) in pediatric patients with granulomatosis with polyangiitis (GPA) or microscopic polyangiitis (MPA). METHODS: The Pediatric Polyangiitis Rituximab Study was a phase IIa, international, open-label, single-arm study. During the initial 6-month remission-induction phase, patients received intravenous infusions of RTX (375 mg/m2 body surface area) and glucocorticoids once per week for 4 weeks. During the follow-up period, patients could receive further treatment, including RTX, for GPA or MPA. The safety, pharmacokinetics, pharmacodynamics, and exploratory efficacy outcomes with RTX were evaluated. RESULTS: Twenty-five pediatric patients with new-onset or relapsing disease were enrolled at 11 centers (19 with GPA [76%] and 6 with MPA [24%]). The median age was 14 years (range 6-17 years). All patients completed the remission-induction phase. During the overall study period (≤4.5 years), patients received between 4 and 28 infusions of RTX. All patients experienced ≥1 adverse event (AE), mostly grade 1 or grade 2 primarily infusion-related reactions. Seven patients experienced 10 serious AEs, and 17 patients experienced 31 infection-related AEs. No deaths were reported. RTX clearance correlated with body surface area. The body surface area-adjusted RTX dosing regimen resulted in similar exposure in both pediatric and adult patients with GPA or MPA. Remission, according to the Pediatric Vasculitis Activity Score, was achieved in 56%, 92%, and 100% of patients by months 6, 12, and 18, respectively. CONCLUSION: In pediatric patients with GPA or MPA, RTX is well tolerated and effective, with an overall safety profile comparable to that observed in adult patients with GPA or MPA who receive treatment with RTX. RTX is associated with a positive risk/benefit profile in pediatric patients with active GPA or MPA.
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Granulomatosis con Poliangitis/tratamiento farmacológico , Factores Inmunológicos/uso terapéutico , Poliangitis Microscópica/tratamiento farmacológico , Rituximab/uso terapéutico , Adolescente , Niño , Femenino , Humanos , Factores Inmunológicos/efectos adversos , Factores Inmunológicos/farmacocinética , Masculino , Rituximab/efectos adversos , Rituximab/farmacocinética , Resultado del TratamientoRESUMEN
INTRODUCTION: Because of the chronic nature of giant cell arteritis (GCA) and/or polymyalgia rheumatica (PMR), patients may require continued glucocorticoid treatment to achieve treatment targets or prevent disease relapse, resulting in high cumulative doses. This study evaluated patterns of glucocorticoid use and outcomes in patients with GCA, PMR, or both. METHODS: This retrospective study used electronic medical records from a US rheumatology clinic utilizing the JointMan® (Discus Analytics, LLC) rheumatology software. Patients aged ≥ 50 years with a diagnosis of GCA or PMR and ≥ 1 entry for a glucocorticoid prescription after diagnosis were included. Outcomes at 2 years after glucocorticoid initiation included the proportion of patients discontinuing glucocorticoids for ≥ 6 months, proportion of patients discontinuing glucocorticoids for ≥ 6 months and remaining off glucocorticoids at 2 years, time to discontinuation of glucocorticoids for ≥ 6 months, and prednisone dose and were compared between patients with GCA only, PMR only, or GCA and PMR. RESULTS: At 2 years after the initiation of glucocorticoids, 32% of patients (26/91) with GCA, 32% (248/779) with PMR, and 27% (26/97) with GCA and PMR discontinued glucocorticoids for ≥ 6 months; 17, 23, and 18% discontinued glucocorticoids for ≥ 6 months and remained off glucocorticoids at 2 years, respectively. Median (range) time to discontinuation of glucocorticoids for ≥ 6 months was 202.5 (0-635) days and shorter in patients with both GCA and PMR vs. GCA or PMR only. The majority of patients required daily prednisone at 2 years, with similar doses observed between groups. CONCLUSIONS: Fewer than one-third of patients with GCA and/or PMR discontinued glucocorticoids for ≥ 6 months; the majority of patients required prednisone therapy for ≥ 2 years after its initiation. These data highlight the need for the use of more efficacious and glucocorticoid-sparing therapies in patients with GCA and/or PMR.
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OBJECTIVE: To assess differences in joint damage and inflammation using magnetic resonance imaging (MRI) between patients with rheumatoid arthritis (RA) who achieved low disease activity with tocilizumab (TCZ) + methotrexate (MTX) and subsequently continued or discontinued MTX. METHODS: In the COMP-ACT trial, US patients with RA received subcutaneous TCZ 162 mg + MTX. Those who achieved 28-joint count Disease Activity Score calculated with erythrocyte sedimentation rate (DAS28-ESR) ≤ 3.2 at Week 24 were randomized 1:1 (double-blind) to discontinue MTX (TCZ monotherapy; mono) or continue TCZ + MTX until Week 52. In a subset of patients, 1.5-Tesla MRI was used to obtain images of bilateral hands and wrists at weeks 24 and 40. Outcomes included changes in MRI-assessed synovitis, osteitis, erosion, and cartilage loss from Week 24 to Week 40, and in the proportion of patients with progression of each score. RESULTS: Of 296 patients who achieved DAS28-ESR ≤ 3.2 at Week 24, 79 were enrolled in the pilot MRI substudy and randomized to TCZ mono (n = 38) or TCZ + MTX (n = 41). Treatment with either TCZ mono or TCZ + MTX suppressed erosion progression, synovitis, osteitis, and cartilage loss. The proportion of patients with no progression in each outcome measure was similar between groups (range, TCZ mono: 84.8-97.0%; TCZ + MTX: 92.3-100%). CONCLUSION: In a subset of patients who achieved low disease activity with TCZ + MTX, MRI changes were minimal in intraarticular inflammation and damage measures in patients who discontinued MTX versus those who continued TCZ + MTX.
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Anticuerpos Monoclonales Humanizados/administración & dosificación , Antirreumáticos/administración & dosificación , Artritis Reumatoide/diagnóstico por imagen , Artritis Reumatoide/tratamiento farmacológico , Imagen por Resonancia Magnética/métodos , Metotrexato/administración & dosificación , Adulto , Anciano , Sedimentación Sanguínea , Progresión de la Enfermedad , Método Doble Ciego , Quimioterapia Combinada , Femenino , Estudios de Seguimiento , Humanos , Inyecciones Subcutáneas , Masculino , Persona de Mediana Edad , Osteítis/diagnóstico por imagen , Osteítis/tratamiento farmacológico , Proyectos Piloto , Sinovitis/diagnóstico por imagen , Sinovitis/tratamiento farmacológico , Resultado del TratamientoRESUMEN
INTRODUCTION: Oral glucocorticoids (GC) have been the mainstay of treatment for giant cell arteritis (GCA). We estimated the risk and dose-effect relationship of potential GC-related adverse events (AEs) in patients with GCA. METHODS: This retrospective, observational cohort study utilized data from the IBM Explorys Electronic Health Records database from 2008 through 2016. Inclusion criteria included the presence of at least two GCA diagnostic codes in subjects aged 50 or older along with supporting laboratory [C-reactive protein (CRP) or erythrocyte sedimentation rate (ESR)], prescription data on oral GCs, and at least 12 months of follow-up before and after the first oral GC prescription for GCA (index date). Potential AEs captured on the basis of new diagnoses, prescriptions, and laboratory tests were assessed during the 12 months post-index date. Results were descriptively summarized across cohorts according to quartiles (Q) of mean daily GC dose measured over the first 6 months of follow-up (Q1, ≥ 1.00 to ≤ 13.75 mg; Q2, > 13.75 to ≤ 25.00 mg; Q3, > 25.00 to ≤ 40.00 mg; Q4, > 40.00 mg). RESULTS: We identified 785 eligible patients with GCA. The mean (SD) age of the cohort was 76 (9) years and 70% were female. The mean oral GC dose during the first 6 months post-index was 28.9 mg/day. A dose-effect response was observed from Q1 to Q4 in the following potential GC-related AEs: newly diagnosed type 2 diabetes/HbA1c > 7.5% (range 7.5-24.5%), blood glucose ≥ 200 mg/dL (range 7.5-15%), serious infection (range 16.8-24.8%), cataracts (range 12.0-21.7%), gastrointestinal bleed/ulcer (range 6.0-11.8%), and increase in BMI ≥ 5 units (range 4.1-6.4). CONCLUSIONS: In patients with GCA, potential GC-related AEs increased with higher daily oral GC doses. This highlights the need for effective therapies that reduce GC exposure and toxicity. FUNDING: Genentech, Inc.
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OBJECTIVE: To quantify the healthcare expenditures associated with potential oral glucocorticoid (OGC)-related adverse events (AEs) in patients with giant cell arteritis (GCA). METHODS: Patients with GCA and ≥ 1 OGC prescription fill between 2009 and 2014 were identified from the MarketScan Commercial and Medicare Supplemental claims databases. Patients were stratified into four groups based on cumulative OGC dose (> 0 to ≤ 2607 mg, > 2607 to ≤ 4800 mg, > 4800 to ≤ 7200 mg, and > 7200 mg) during the 1-year follow-up period; incidence of potential AEs and AE-related direct healthcare costs in USD were assessed. Association between the log of cumulative OGC dose and AE-related direct healthcare costs was evaluated, adjusting for baseline characteristics. RESULTS: Of 1602 patients with GCA included, 69% were women; the mean age was 73 years. The mean cumulative OGC dose was 5806 mg during the 1-year follow-up; most exposure occurred in the first 6 months. The proportion of patients with potential OGC-related AEs was 36.5% overall and increased as cumulative dose increased (30.7%-45.3% across dose groups). Unadjusted mean AE-related costs for patients with an AE was USD $12,818. In the multivariable model including all patients, increasing OGC dose was associated with increasing AE-related healthcare costs (cost ratio, 1.38 [95% CI, 1.16-1.64] per 1-unit increase in log of cumulative OGC dose [P < 0.001]). Mean (median)-predicted AE costs for the dose groups were USD $4389 ($2749) for > 0 to ≤ 2607 mg, USD $5176 ($3009) for > 2607 to ≤ 4800 mg, USD $5576 ($3633) for > 4800 to ≤ 7200 mg, and USD $6609 ($4447) for > 7200 mg. CONCLUSION: In patients with GCA, OGC-related AEs increased with increasing cumulative OGC dose, resulting in increased healthcare costs. These results highlight the need for efficacious therapies that reduce the exposure to and potential risks associated with OGCs.
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OBJECTIVE: Randomised controlled trials (RCTs) have shown tocilizumab (TCZ) administered intravenously or subcutaneously with conventional synthetic disease-modifying antirheumatic drugs (csDMARDs) to be superior to csDMARDs alone for improving rheumatoid arthritis (RA) disease activity. This study evaluated the effect of TCZ-intravenous and TCZ-subcutaneous on patient-reported outcomes (PROs) in three RCT populations. METHODS: OPTION (NCT00106548), BREVACTA (NCT01232569) and SUMMACTA (NCT01194414) were independent RCTs evaluating the efficacy and safety of TCZ-intravenous and/or TCZ-subcutaneous with csDMARDs in patients with RA. PROs included patient global assessment, pain, Health Assessment Questionnaire-Disability Index, Functional Assessment of Chronic Illness Therapy-Fatigue and Short Form-36. Study outcomes included the proportions of patients reporting changes from baseline in PRO scores ≥ minimum clinically important differences (MCID) and scores ≥ age and gender-matched normative values. RESULTS: In OPTION, more patients who received TCZ-intravenous reported improvements in PROs ≥MCID (50%-82% vs 31%-57%) and scores ≥ normative values (16%-44% vs 5%-28%) at week 16 compared with placebo. Similarly, a greater proportion of patients in BREVACTA who received TCZ-subcutaneous reported improvements ≥ MCID (54%-73% vs 42%-55%) and scores ≥ normative values (8%-34% vs 4%-25%) at week 12 compared with placebo. In SUMMACTA, 61%-84% of patients who received TCZ-subcutaneous and 64%-84% of those who received TCZ-intravenous reported improvements ≥ MCID and 14%-41% and 15%-24%, respectively, scores ≥ normative values at week 24. CONCLUSIONS: TCZ-intravenous or TCZ-subcutaneous with csDMARDs resulted in more patients reporting clinically meaningful improvements and PRO scores ≥ normative values compared with placebo. These improvements were similar with TCZ-intravenous and TCZ-subcutaneous.
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OBJECTIVE: To evaluate whether tocilizumab (TCZ) monotherapy is noninferior to treatment with TCZ plus methotrexate (MTX) for maintaining clinical responses in patients with rheumatoid arthritis (RA) in whom low disease activity is achieved with TCZ plus MTX. METHODS: Patients with RA who experienced an inadequate response to MTX received MTX plus TCZ 162 mg subcutaneously. At 24 weeks, patients who achieved a Disease Activity Score in 28 joints using the erythrocyte sedimentation rate (DAS28-ESR) of ≤3.2 were randomized to receive TCZ monotherapy or to continue treatment with TCZ plus MTX until week 52. The primary outcome measure was the comparison of the mean change in the DAS28-ESR from week 24 to week 40 between the TCZ monotherapy and TCZ plus MTX arms (noninferiority margin of 0.6). Secondary outcome measures included worsening of the DAS28-ESR by ≥1.2, achievement of a DAS28-ESR of <2.6 and ≤3.2, and safety and immunogenicity. RESULTS: Among the 718 patients enrolled, 296 were randomized at week 24 to receive TCZ monotherapy (n = 147) or TCZ plus MTX (n = 147). The mean changes in the DAS28-ESR from week 24 to week 40 were 0.46 and 0.14 in the TCZ monotherapy arm and the TCZ plus MTX arm, respectively (weighted difference between the groups, 0.318 [95% confidence interval 0.045, 0.592]); discontinuing MTX in TCZ responders was noninferior to continuing MTX. Safety events were broadly similar between the randomized treatment groups; the most common serious adverse event was infection, which occurred in 2.1% of patients in the TCZ monotherapy group and 2.2% of patients receiving TCZ plus MTX. CONCLUSION: Patients with RA receiving TCZ plus MTX who achieve low disease activity can discontinue MTX without significant worsening of disease activity during the 16 weeks following MTX discontinuation.
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Anticuerpos Monoclonales Humanizados/administración & dosificación , Antirreumáticos/administración & dosificación , Artritis Reumatoide/tratamiento farmacológico , Metotrexato/administración & dosificación , Privación de Tratamiento , Adulto , Artritis Reumatoide/patología , Progresión de la Enfermedad , Método Doble Ciego , Quimioterapia Combinada , Femenino , Humanos , Masculino , Persona de Mediana Edad , Factores de Tiempo , Resultado del TratamientoRESUMEN
INTRODUCTION: Granulomatosis with polyangiitis (GPA) and microscopic polyangiitis (MPA) are two related forms of systemic vasculitis. Patients with these conditions often experience relapses affecting various body systems. Here we describe rates of relapse and review healthcare costs resulting from relapse among patients with GPA/MPA. METHODS: Two groups of patients with GPA and MPA were selected from the MarketScan claims databases between 2011 and 2013 based on diagnosis codes. Patients were followed for 12 months to identify relapses based on an algorithm of diagnoses in medical and medication claims. Relapses were categorized into one of the following groups: renal relapse, pulmonary relapse, other relapse-associated condition relapse, GPA or MPA utilization relapse, and mixed relapse. RESULTS: The final sample of patients with GPA and MPA consisted of 2707 and 740 patients, respectively. In both groups, approximately one-quarter of patients experienced relapse during the 12-month follow-up period. The mean all-cause healthcare costs in the 4-month period after relapse were $38,313 (SD, $54,120) for patients with GPA and $35,947 (SD, $48,065) for patients with MPA. In both groups, renal relapses were the costliest. Costs during the 4 months immediately following relapses were substantially higher than what could be expected over a 4-month follow-up among patients who did not experience relapse based on 12-month all-cause costs (GPA, $32,005 [SD, $64,570]; MPA, $61,044 [SD, $125,093]). CONCLUSIONS: Relapses are common among patients with GPA and MPA, and treatment of relapses can be costly. More effective therapies are needed to prevent relapses. FUNDING: Genentech, Inc.
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OBJECTIVE: Two randomised controlled trials, AMBITION (NCT00109408) and ADACTA (NCT01119859), showed tocilizumab (TCZ) monotherapy superior to methotrexate (MTX) and adalimumab (ADA) monotherapy, respectively, for improving rheumatoid arthritis (RA) disease activity. This study compared the benefit of TCZ versus MTX or ADA monotherapy for improving patient-reported outcomes (PROs) in patients with RA. METHODS: PROs included patient global assessment (PtGA), pain, Health Assessment Questionnaire Disability Index (HAQ-DI), Functional Assessment of Chronic Illness Therapy (FACIT)-Fatigue and Short Form-36 (SF-36) physical component summary (PCS) and mental component summary (MCS) and eight domain scores. Outcomes included proportions of patients reporting changes from baseline in PRO scores ≥minimum clinically important differences (MCID) and ≥age-matched and gender-matched normative values at 24 weeks. RESULTS: In AMBITION, TCZ-treated patients reported significantly greater mean improvements in HAQ (-0.7 vs -0.5), FACIT-Fatigue (8.7 vs 5.7), SF-36 PCS (9.8 vs 7.8) and five SF-36 domains at week 24 than with MTX; 45.0%-84.0% of TCZ-treated patients reported improvements ≥MCID, and 24.3%-52.1% reported scores ≥normative values across all PROs versus 39.4%-81.8% and 14.5%-45.0%, respectively, with MTX. In ADACTA, TCZ-treated patients reported significantly greater improvements in PtGA (-42.3 vs -31.8), pain (-40.1 vs -28.7), SF-36 MCS (7.9 vs 5.0) and three SF-36 domains than with ADA; 57.7%-83.3% of TCZ-treated patients reported improvements ≥MCID, and 22.1%-49.3% reported scores ≥normative values across all PROs versus 13.6%-37.8%, respectively, with ADA. CONCLUSIONS: TCZ monotherapy resulted in more patients reporting clinically meaningful PRO improvements and PRO scores ≥normative values compared with MTX or ADA monotherapy. TRIAL REGISTRATION NUMBERS: NCT00109408 and NCT01119859; Post-results.
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OBJECTIVE: Subcutaneous (SC) and intravenous formulations of tocilizumab (TCZ) are available for the treatment of patients with rheumatoid arthritis (RA), based on the efficacy and safety observed in clinical trials. Anti-TCZ antibody development and its impact on safety and efficacy were evaluated in adult patients with RA treated with intravenous TCZ (TCZ-IV) or TCZ-SC as monotherapy or in combination with conventional synthetic disease-modifying antirheumatic drugs (csDMARDs). METHODS: Data from 5 TCZ-SC and 8 TCZ-IV phase III clinical trials and 1 TCZ-IV clinical pharmacology safety study (>50â 000 samples) were pooled to assess the immunogenicity profile of TCZ-SC and TCZ-IV (8974 total patients). The analysis included antidrug antibody (ADA) measurement following TCZ-SC or TCZ-IV treatment as monotherapy or in combination with csDMARDs, after dosing interruptions or in TCZ-washout samples, and the correlation of ADAs with clinical response, adverse events or pharmacokinetics (PK). RESULTS: The proportion of patients who developed ADAs following TCZ-SC or TCZ-IV treatment was 1.5% and 1.2%, respectively. ADA development was also comparable between patients who received TCZ monotherapy and those who received concomitant csDMARDs (0.7-2.0%). ADA development did not correlate with PK or safety events, including anaphylaxis, hypersensitivity or injection-site reactions, and no patients who developed ADAs had loss of efficacy. CONCLUSIONS: The immunogenicity risk of TCZ-SC and TCZ-IV treatment was low, either as monotherapy or in combination with csDMARDs. Anti-TCZ antibodies developed among the small proportion of patients had no evident impact on PK, efficacy or safety.
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Anticuerpos Monoclonales Humanizados/inmunología , Anticuerpos/sangre , Artritis Reumatoide/tratamiento farmacológico , Hipersensibilidad a las Drogas/inmunología , Administración Intravenosa , Anafilaxia/inducido químicamente , Anticuerpos Monoclonales Humanizados/farmacocinética , Anticuerpos Monoclonales Humanizados/uso terapéutico , Ensayos Clínicos Fase III como Asunto , Quimioterapia Combinada , Humanos , Inyecciones SubcutáneasRESUMEN
INTRODUCTION: To assess the long-term safety and efficacy of subcutaneous tocilizumab (TCZ-SC) in US patients with rheumatoid arthritis (RA) who rolled over from the two global phase 3 studies, SUMMACTA (NCT01194414) and BREVACTA (NCT1232569), into this open-label, single-arm, phase 3b study. METHODS: Patients continued to receive TCZ-SC 162 mg weekly or every other week or switched from intravenous TCZ to TCZ-SC 162 mg qw for up to 84 weeks. The primary endpoint was the proportion of patients with serious adverse events (SAEs). Secondary endpoints included clinical efficacy, laboratory abnormalities, and immunogenicity. RESULTS: Of the 217 patients treated, 76.5% were female, and the mean age was 58.4 years. A total of 23 patients (10.6%) had ≥1 SAE. The most common SAEs were infections (3.7%). Alanine aminotransferase elevations (38.2%) were not associated with hepatic injury. Grade 3/4 neutropenia (3%) was transient and not associated with serious infections. Immunogenicity was low (<1%) and not associated with SAEs. No anaphylaxis or deaths occurred. Thirteen patients (6.0%) withdrew due to safety reasons. Mean Clinical Disease Activity Index and Disease Activity Score in 28 joints remained stable throughout the trial. CONCLUSIONS: The long-term safety of TCZ-SC during the long-term extension period was consistent with the safety profiles from SUMMACTA and BREVACTA, with no new safety signals. Efficacy improvements observed from baseline remained stable over time. These results demonstrated the durability of the safety and efficacy responses, and low immunogenicity, with long-term exposure to TCZ-SC in patients with RA. FUNDING: F. Hoffmann-La Roche, Ltd. TRIAL REGISTRATION NUMBER: ClinicalTrials.gov identifier, NCT01662063.
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The measurement of body fluid levels of biochemical markers in joint tissues has begun to provide clinically useful information. Synovial fluid (SF) plays an important role in articular joint lubrication, nutrition, and metabolism of cartilage and other connective tissues within the joint. The purpose of our study was to identify and characterize osteogenic protein 1 (OP-1) in SF from patients with rheumatoid arthritis (RA) or with osteoarthritis (OA) and to correlate levels of OP-1 with those of hyaluronan (HA) and antigenic keratan sulfate (AgKS). SF was aspirated from the knees of patients with either RA or OA and from the knees of asymptomatic organ donors with no documented history of joint disease. The presence of detectable OP-1 in SF was demonstrated by western blots with specific anti-pro-OP-1 and anti-mature OP-1 antibodies. Measurement of levels of OP-1, HA and AgKS was performed using ELISAs. OP-1 was identified in human SF in two forms, pro-OP-1 and active (mature) OP-1--mature OP-1 being detected only in SF from OA patients and RA patients. Levels of OP-1 and HA were higher in RA patients than in OA patients and asymptomatic donors, while the level of AgKS was highest in SF from asymptomatic donors. Statistically significant differences were found between SF levels of OP-1 in RA and OA patients and between SF levels of AgKS among the three groups tested. The SF content of OP-1 tended to correlate positively with HA levels, but negatively with AgKS concentrations. In conclusion, the results of this study suggest that measurement of OP-1 in joint fluid may have value in the clinical evaluation of joint disease processes.
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Artritis Reumatoide/fisiopatología , Proteínas Morfogenéticas Óseas/análisis , Ácido Hialurónico/sangre , Sulfato de Queratano/sangre , Osteoartritis/fisiopatología , Líquido Sinovial/química , Artritis Reumatoide/inmunología , Artritis Reumatoide/terapia , Autoantígenos/sangre , Proteína Morfogenética Ósea 7 , Proteínas Morfogenéticas Óseas/inmunología , Humanos , Sulfato de Queratano/inmunología , Articulación de la Rodilla , Osteoartritis/inmunología , Osteoartritis/terapia , Valores de ReferenciaRESUMEN
Specific antagonists of tumour necrosis factor (TNF)-alpha have rapidly gained popularity for the treatment of rheumatoid arthritis. The monoclonal antibody against TNF-alpha, infliximab, has been associated with induction of systemic lupus erythematosus (SLE); however, there have been no published reports of drug-induced SLE associated with the soluble TNF-alpha receptor etanercept. We describe four female patients who developed signs and symptoms of SLE during treatment with etanercept; in two SLE was unambiguous. On diagnosis of SLE, etanercept was discontinued and the SLE-related symptoms promptly resolved. Etanercept should be considered in the list of agents associated with drug-induced SLE.