RESUMO
PURPOSE: To evaluate the long-term outcomes of rituximab (RTX) treatment in patients with ocular granulomatosis with polyangiitis (GPA) with localized or generalized disease. DESIGN: Retrospective cohort. PARTICIPANTS: Thirty-seven patients with ocular GPA receiving RTX in a multidisciplinary vasculitis clinic between 2004 and 2013. METHODS: A total of 100 patients who received a course of RTX were identified, and notes were reviewed. Baseline demographic details, clinical characteristics (including organ involvement), drugs used, and outcome measures were recorded. MAIN OUTCOME MEASURES: The percentage in remission (inactive disease with prednisolone ≤7.5 mg with or without maintenance treatment) at 6 months, time to remission, percentage relapsing, side effects, B-cell count, antineutrophil cytoplasm antibody titers, induction, and maintenance regimens. RESULTS: The median follow-up time after the first RTX course was 36.5 months. Twenty patients had scleritis, and 17 patients had orbital disease; 86% achieved remission at 6 months. The percentage in remission versus partial remission was not statistically significant between patients with scleritis and patients with orbital disease (85% vs. 15% with scleritis and 82% vs. 18% with orbital disease; P = 1.00). The percentage relapsing was not statistically significant (P = 0.33) between scleritis (60%) and orbital disease (41%). Localized disease (ocular ± ear-nose-throat/lung) was observed in 57%, and generalized disease (ocular plus other organs) was observed in 43%, the former having a median duration of disease of 40 months. There was no statistically significant difference (P = 0.37) in the percentage in remission between localized and generalized ocular disease. Relapses occurred in 51%, with localized disease being a significant risk factor for relapse. Fifty percent of patients with generalized disease versus none with localized disease received cyclophosphamide (CYP) as part of the induction regimen. Patients who received CYP during induction had significantly (P = 0.027) lower ratios of baseline 12-month proteinase 3 titers than patients who did not have CYP. Infections were observed in 16% of patients, with 8% requiring hospital admission. CONCLUSIONS: Our long-term data suggest that RTX is effective for inducing disease remission in localized and generalized ocular GPA. Localized disease is a significant risk factor for relapse, which may be related to less use of CYP in the induction regimen.
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Anticorpos Monoclonais Murinos/uso terapêutico , Granulomatose com Poliangiite/tratamento farmacológico , Imunossupressores/uso terapêutico , Pseudotumor Orbitário/tratamento farmacológico , Esclerite/tratamento farmacológico , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Anticorpos Anticitoplasma de Neutrófilos/sangue , Linfócitos B/imunologia , Estudos de Coortes , Ciclofosfamida/uso terapêutico , Feminino , Seguimentos , Granulomatose com Poliangiite/diagnóstico , Granulomatose com Poliangiite/imunologia , Humanos , Contagem de Linfócitos , Masculino , Pessoa de Meia-Idade , Pseudotumor Orbitário/diagnóstico , Pseudotumor Orbitário/imunologia , Recidiva , Estudos Retrospectivos , Rituximab , Esclerite/diagnóstico , Esclerite/imunologia , Resultado do TratamentoRESUMO
PURPOSE: To evaluate the long-term clinical and functional outcome, risks, and causes of vision loss and burden of disease among patients with uveitis. DESIGN: Cross-sectional study. PARTICIPANTS: The study included 1076 patients diagnosed with uveitis who attended the uveitis clinic at Moorfields Eye Hospital, London, United Kingdom, between 2011 and 2013. METHODS: Information was gathered from the notes of all patients who were examined in the clinic. MAIN OUTCOME MEASURES: Best-corrected visual acuity (BCVA), causes of moderate vision loss (MVL; 20/50-20/120), and severe vision loss (SVL; ≤ 20/200). RESULTS: The study included 1799 eyes of 1076 patients with an average follow-up of 7.97 ± 0.17 years (median, 5.6 years; range, 1 month-54 years; 8159 patient-years; 14 226 eye-years). Average BCVA remained stable for patients with anterior uveitis (20/30 at baseline to 20/33 at 10 years), as well as for those with nonanterior uveitis (20/50 at baseline to 20/47 at 10 years). Vision loss was noted in 19.2% of eyes, with an incidence for MVL of 0.01 per eye-year or 0.02 per patient-year and for SVL of 0.01 per eye-year or 0.02 per patient-year. Patients were more at risk of vision loss if they had non-anterior uveitis disease, vitreous opacities, retinal detachment, cystoid macular edema (CME), macular scarring, macular hole, optic neuropathy, or macular ischemia. Chronic CME was the most common cause of MVL (3.55%), and macular scarring was the most common cause for irreversible SVL (4%). Among 525 patients (48.7%) who received oral prednisolone, 320 (61%) required a dose of more than 40 mg/day and 130 (24.8%) also required 1 or more second-line agents. Patients were reviewed on average 33.7 ± 0.7 times or 5.9 ± 0.46 times/year. CONCLUSIONS: Long-term functional outcome among uveitis patients is good, with BCVA remaining stable for more than 10 years of follow-up. In cases when vision loss occurs, it is related mainly to retinal changes. The burden on clinical services is similar regardless of the severity of disease or the risk of vision loss.
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Cegueira/etiologia , Uveíte , Baixa Visão/etiologia , Corticosteroides/uso terapêutico , Adulto , Idoso , Anti-Inflamatórios/uso terapêutico , Efeitos Psicossociais da Doença , Estudos Transversais , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Reino Unido , Uveíte/complicações , Uveíte/fisiopatologia , Uveíte/terapia , Acuidade Visual/fisiologiaRESUMO
PURPOSE: To describe the long-term outcome of eyes with uveitis after repeated treatment with dexamethasone implants (Ozurdex; Allergan, Inc., Irvine, CA). DESIGN: Retrospective, observational case series. PARTICIPANTS: Thirty-eight eyes of 27 patients with uveitis that were treated with 61 dexamethasone implants. METHODS: All eyes underwent dexamethasone pellet implantation. Anatomic and functional outcomes, as well as ocular complications, were noted. MAIN OUTCOME MEASURES: Best-corrected visual acuity (BCVA), central retinal thickness (CRT), vitreous haze score, and presence of increased intraocular pressure or cataract. RESULTS: Average follow-up was 17.3 ± 1.8 months after the first implant (median, 13.3 months; range, 3-54.5 months; 54.65 eye-years), with 14 eyes (36.9%) receiving a single implant and 24 eyes (63.1%) receiving multiple implantations. After the first implantation, average BCVA improved significantly from 0.47 ± 0.05 logarithm of the minimum angle of resolution (logMAR) units (Snellen equivalent, 20/60) to 0.27 ± 0.07 logMAR (Snellen equivalent, 20/37; P<0.001); CRT decreased by 263 ± 44.22 µm (P = 0.003), although macular edema persisted in 50% of eyes, and the percentage of eyes achieving a vitreous haze score of 0 increased from 58% to 83% (P = 0.03). The median duration of therapeutic effect after the first injection was 6 months (range, 2-42 months), with a similar response achieved after each repeat implantation. The accumulated effect of repeat dexamethasone implants resulted in a continued improvement in BCVA (R(2) = 0.91; P<0.0001), with significant improvement and stabilization of CRT. After repeated implantations, 2 eyes had progression of posterior subcapsular opacities, although neither required surgery. There were 7 instances of increased intraocular pressure of more than 21 mmHg at a rate of 0.13 per eye-year, all of which responded to pharmacologic treatment. CONCLUSIONS: The accumulated effect of repeat dexamethasone pellet implantations improves retinal thickness and resolves ocular inflammation, resulting in restoration of ocular function. Ocular complications were minimal, with no eyes requiring surgery for increased ocular pressure or progression of cataract.
Assuntos
Dexametasona/administração & dosagem , Glucocorticoides/administração & dosagem , Uveíte/tratamento farmacológico , Catarata/induzido quimicamente , Dexametasona/efeitos adversos , Implantes de Medicamento , Feminino , Glucocorticoides/efeitos adversos , Humanos , Pressão Intraocular/efeitos dos fármacos , Edema Macular/tratamento farmacológico , Masculino , Pessoa de Meia-Idade , Hipertensão Ocular/induzido quimicamente , Retina/efeitos dos fármacos , Retina/patologia , Retratamento , Estudos Retrospectivos , Tomografia de Coerência Óptica , Resultado do Tratamento , Acuidade Visual/fisiologia , Corpo Vítreo/efeitos dos fármacosRESUMO
PURPOSE: To evaluate the outcomes of changing immunosuppressive therapy for noninfectious uveitis after failure. DESIGN: Retrospective cohort study. PARTICIPANTS: Patients with noninfectious uveitis managed at 2 tertiary uveitis clinics in the United Kingdom and Australia. METHODS: Participants with a history of using immunosuppressive therapy were identified in clinics, and notes were reviewed by doctors trained in uveitis therapy. Each treatment episode/course (starting or changing a therapy) was identified, and demographic details, clinical characteristics, drug used (second-line immunosuppressive agent [ISA] or biologicals), and drug doses were obtained. MAIN OUTCOME MEASURES: For each treatment episode, the reasons for changing therapy, corticosteroid-sparing effects, and control of inflammation were determined. RESULTS: A total of 147 patients were identified who underwent 309 different treatment episodes. Fifty-five percent of patients eventually required a change in treatment after their first treatment episode/course. Forty-five episodes involved switching from one ISA to another, with 50% to 100% of these patients achieving "success" (prednisolone ≤10 mg and sustained control) with the new ISA. A combination of ISAs were used in 53 episodes, with "success" being achieved in 50% to 71% of these patients. Biological agents were used in 45 episodes, the most common one being infliximab, which achieved success in 80% of patients. CONCLUSIONS: Our data suggest that control of inflammation can be achieved after switching or combining ISAs.
Assuntos
Substituição de Medicamentos , Imunossupressores/uso terapêutico , Uveíte/tratamento farmacológico , Adolescente , Adulto , Idoso , Azatioprina/uso terapêutico , Criança , Pré-Escolar , Estudos de Coortes , Ciclosporina/uso terapêutico , Feminino , Humanos , Masculino , Metotrexato/uso terapêutico , Pessoa de Meia-Idade , Ácido Micofenólico/análogos & derivados , Ácido Micofenólico/uso terapêutico , Prednisolona/uso terapêutico , Estudos Retrospectivos , Falha de Tratamento , Resultado do Tratamento , Uveíte/fisiopatologia , Acuidade Visual/fisiologia , Adulto JovemRESUMO
PURPOSE OF REVIEW: Birdshot chorioretinopathy remains incompletely understood, but new insights into its pathogenesis have been reported recently, and treatment and monitoring options have also expanded. Central visual acuity may remain good until the late stages of the disease, but loss of visual field and peripheral retinal function is common. RECENT FINDINGS: The underlying pathogenesis of the disease has long been believed to be T-cell driven, but examination of the IL-17 pathway has now further refined the potential underlying mechanism. New imaging techniques, including extended depth imaging of the choroid with optical coherence tomography, have demonstrated promise in detecting disease activity earlier, enabling targeted treatment to be given. Treatment options have expanded with the advent of the biological agents, and these may yet improve outcomes, particularly in refractory patients. SUMMARY: Laboratory research continues to investigate the underlying mechanisms of disease, but our understanding remains frustratingly incomplete for a disease with such a clear HLA association. Clinical research is increasingly being driven to improve the phenotyping of affected patients so that those at risk of visual loss can be identified early and treated more aggressively with individually targeted therapies such as the newer biological agents, but how successful this approach will ultimately prove to be remains to be seen.
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Coriorretinite , Coriorretinopatia de Birdshot , Coriorretinite/diagnóstico , Coriorretinite/imunologia , Coriorretinite/terapia , Angiofluoresceinografia , Humanos , Tomografia de Coerência Óptica , Acuidade Visual/fisiologia , Campos Visuais/fisiologiaRESUMO
PURPOSE: To assess the outcomes of the intravitreal administration of methotrexate in uveitis. METHODS: Multicenter, retrospective interventional case series of patients with noninfectious uveitis. Thirty-eight eyes of 30 patients were enrolled, including a total of 54 intravitreal injections of methotrexate at a dose of 400 µg in 0.1 mL. The primary outcome measure was visual acuity. Secondary outcome measures included control of intraocular inflammation and cystoid macular edema, time to relapse, development of adverse events, and levels of systemic corticosteroid and immunosuppressive therapy. RESULTS: Methotrexate proved effective in controlling intraocular inflammation and improving vision in 30 of 38 eyes (79%). The side effect profile was good, with no reported serious ocular adverse events and only one patient having an intraocular pressure of >21 mmHg. Of the 30 eyes that responded to treatment, 8 relapsed, but 22 (73%) entered an extended period of remission, with the Kaplan-Meier estimate of median time to relapse for the whole group being 17 months. The eight eyes that relapsed were reinjected and all responded to treatment. One eye relapsed at 3 months, but 7 eyes again entered extended remission. Of the 14 patients on systemic therapy at the start of the study, 8 (57%) were able to significantly reduce this following intravitreal methotrexate injection. CONCLUSION: In patients with uveitis and uveitic cystoid macular edema, intravitreal MTX can effectively improve visual acuity and reduce cystoid macular edema and, in some patients, allows the reduction of immunosuppressive therapy. Some patients relapse at 3 to 4 months, but a large proportion (73%) enter an extended period of remission of up to 18 months. This larger study extends the results obtained from previous smaller studies suggesting the viability of intravitreal methotrexate as a treatment option in uveitis.
Assuntos
Imunossupressores/uso terapêutico , Metotrexato/uso terapêutico , Uveíte/tratamento farmacológico , Adulto , Idoso , Feminino , Seguimentos , Humanos , Injeções Intravítreas , Edema Macular/tratamento farmacológico , Edema Macular/fisiopatologia , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Resultado do Tratamento , Uveíte/fisiopatologia , Acuidade Visual/efeitos dos fármacos , Adulto JovemRESUMO
Despite their side-effects and the advent of systemic immunosuppressives and biologics, the use of corticosteroids remains in the management of patients with uveitis, particularly when inflammation is associated with systemic disease or when bilateral ocular disease is present. The use of topical corticosteroids as local therapy for anterior uveitis is well-established, but periocular injections of corticosteroid can also be used to control mild or moderate intraocular inflammation. More recently, intraocular corticosteroids such as triamcinolone and steroid-loaded vitreal inserts and implants have been found to be effective, including in refractory cases. Additional benefits are noted when ocular inflammation is unilateral or asymmetric, when local therapy may preclude the need to increase the systemic medication.Implants in particular have gained prominence with evidence of efficacy including both dexamethasone and fluocinolone loaded devices. However, an appealing avenue of research lies in the development of non-corticosteroid drugs in order to avoid the side-effects that limit the appeal of injected corticosteroids. Several existing drugs are being assessed, including anti-VEGF compounds such as ranibizumab and bevacizumab, anti-tumour necrosis factor alpha antibodies such as infliximab, as well as older cytotoxic medications such as methotrexate and cyclosporine, with varying degrees of success. Intravitreal sirolimus is currently undergoing phase 3 trials in uveitis and other inflammatory pathways have also been proposed as suitable therapeutic targets. Furthermore, the advent of biotechnology is seeing advances in generation of new therapeutic molecules such as high affinity binding peptides or modified high affinity or bivalent single chain Fab fragments, offering higher specificity and possibility of topical delivery.
Assuntos
Corticosteroides/uso terapêutico , Anti-Inflamatórios/uso terapêutico , Oftalmopatias/tratamento farmacológico , Imunossupressores/uso terapêutico , Humanos , Fator de Necrose Tumoral alfa/antagonistas & inibidores , Uveíte/tratamento farmacológicoRESUMO
Treatment of non-infectious uveitis is based primarily on the use of systemic corticosteroids and second-line immunosuppressive drugs. However, their extensive side effect profile, particularly for steroids, has led to the increased use of other immunosuppressive drugs, as sparing capacity agents. Rituximab is an anti-CD20 chimeric antibody, often given as a single course of 2 infusions, resulting in complete depletion of peripheral mature B cells. While it is licensed to treat refractory systemic lymphoma patients, it has also shown promising results in systemic auto-immune diseases, where a single course of treatment is able to achieve long-term clinical remission. Treatment with rituximab has been reported for various ocular conditions, suggesting it may be effective in inducing long-term disease control and other systemic immunosuppressive agents can be reduced or discontinued. When disease relapse occurs, a further course or courses can be given with good results. This review summarizes the current evidence regarding the role of rituximab in treating non-infectious uveitis.
Assuntos
Anticorpos Monoclonais Murinos/uso terapêutico , Fatores Imunológicos/uso terapêutico , Uveíte/tratamento farmacológico , Antígenos CD20/imunologia , Humanos , Infusões Intravenosas , Masculino , Pessoa de Meia-Idade , Rituximab , Uveíte/imunologiaRESUMO
PURPOSE: To determine factors affecting the visual outcome of eyes with endogenous Candida endophthalmitis. METHODS: Retrospective cohort study of 44 eyes from 36 patients diagnosed with candida endophthalmitis at 2 tertiary referral uveitis centers. Outcome measures included the development of retinal detachment and the occurrence of visual loss (visual acuity of <20/40) and severe visual loss (visual acuity of ≤ 20/200). RESULTS: Twenty four of 44 eyes (55%) had visual loss and 16 of 44 eyes (32%) had severe visual loss by the end of the study. Early vitrectomy significantly reduced the risk of retinal detachment (P = 0.02). Factors associated with poor visual outcome included poor presenting visual acuity (relative risk = 2.38; 95% confidence interval, 1.01-5.55; P < 0.05) and centrally located fungal lesions (relative risk = 5.01; 95% confidence interval, 1.00-2.52; P < 0.05). CONCLUSION: Candida endophthalmitis is associated with a high rate of visual loss, particularly in patients with poor presenting visual acuity or centrally located lesions. Early vitrectomy reduces the risk of retinal detachment.
Assuntos
Candida/isolamento & purificação , Endoftalmite/microbiologia , Infecções Oculares Fúngicas/microbiologia , Acuidade Visual/fisiologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Endoftalmite/cirurgia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Descolamento Retiniano/prevenção & controle , Estudos Retrospectivos , Fatores de Risco , VitrectomiaRESUMO
The treatment of non-infectious uveitis affecting the posterior segment of the eye has been revolutionized by the development of sustained-release corticosteroid implants over the past decade. Their use is now supported by healthcare systems that have licensed and commissioned them on the basis of the high-quality randomised controlled trials that formed part of their development and which have informed clinicians as to their benefits and risks. In particular, they have provided an alternative mode of treatment for patients who do not wish to be systemically immunosuppressed, or in whom such immunosuppression is less desirable, such as those with unilateral disease or those with concurrent illnesses such as diabetes mellitus, renal disease or osteoporosis that are negatively impacted by systemic corticosteroids or other immunosuppressive agents. In this article, we review the evidence for the use of the major licensed corticosteroid implants and assess the advantages and disadvantages of each.
RESUMO
OBJECTIVE: To report the long-term outcome of the treatment of refractory ophthalmic Wegener's granulomatosis (WG) with rituximab (RIT), including rates of relapse, predictors of relapse, and results of repeat treatment. DESIGN: Retrospective case series. PARTICIPANTS: We included 20 consecutive patients with refractory ophthalmic WG treated with RIT. INTERVENTION: Intravenous RIT infusion, 2 doses of 1 g given 2 weeks apart. MAIN OUTCOME MEASURES: Regular clinical, serologic, and immunologic examinations for disease activity and extent, and for treatment-related side effects. RESULTS: All 20 patients entered remission, the median time to remission being 2 months (range, 1-6). Seven patients (35%) relapsed at a median of 13 months (range, 9-18). Five of these patients took a second course of RIT, and all achieved remission without further relapse. In the 16 patients with positive anti-proteinase-3 (PR3) titers at baseline, rising anti-PR3 titer was a statistically significant predictor of relapse. There were 4 severe adverse events during the study, of which one was directly attributed to treatment with RIT. CONCLUSIONS: In this series of 20 patients with refractory ophthalmic WG, RIT was effective in inducing remission. Relapse occurred in one third of patients within 18 months and seemed to be predictable by rising anti-PR3 titers, but retreatment with RIT was effective in this group. In patients with ophthalmic WG, RIT may be capable of inducing extended remission, in contrast with other biologic and conventional treatments in common use. FINANCIAL DISCLOSURE(S): Proprietary or commercial disclosure may be found after the references.
Assuntos
Anticorpos Anticitoplasma de Neutrófilos/sangue , Anticorpos Monoclonais Murinos/uso terapêutico , Autoanticorpos/sangue , Oftalmopatias/tratamento farmacológico , Granulomatose com Poliangiite/tratamento farmacológico , Fatores Imunológicos/uso terapêutico , Mieloblastina/imunologia , Adulto , Idoso , Anticorpos Monoclonais Murinos/administração & dosagem , Linfócitos B/imunologia , Oftalmopatias/diagnóstico , Oftalmopatias/imunologia , Feminino , Citometria de Fluxo , Granulomatose com Poliangiite/diagnóstico , Granulomatose com Poliangiite/imunologia , Humanos , Fatores Imunológicos/administração & dosagem , Imunossupressores/uso terapêutico , Infusões Intravenosas , Masculino , Pessoa de Meia-Idade , Recidiva , Retratamento , Estudos Retrospectivos , Fatores de Risco , Rituximab , Resultado do Tratamento , Adulto JovemRESUMO
PURPOSE OF REVIEW: To review new clinically relevant data regarding the intraocular treatment of noninfectious uveitis. RECENT FINDINGS: Triamcinolone acetonide, the most commonly used intravitreal corticosteroid for treatment of uveitis and uveitic macular oedema has a limited duration of action and is associated with a high risk of corticosteroid-induced intraocular pressure (IOP) rise and cataract. Recent advances have led to the development of sustained-release corticosteroid devices using different corticosteroids such as dexamethasone and fluocinolone acetonide. Treatment options for patients who have previously exhibited corticosteroid hypertensive response have also expanded through the use of new noncorticosteroid intravitreal therapeutics such as methotrexate and antivascular endothelial growth factor (anti-VEGF) agents. SUMMARY: Ozurdex dexamethasone implant appears to have a better safety profile, and a slightly long-lasting effect than triamcinolone acetonide. The Retisert implant allows the release of corticosteroids at a constant rate for 2.5 years, but it requires surgical placement and its use is associated with a very high risk of cataract and requirement for IOP-lowering surgery. For patients who are steroid responders, methotrexate may offer a better alternative to corticosteroid treatment than anti-VEGF agents, but controlled trials are required to confirm this.
Assuntos
Uveíte/tratamento farmacológico , Glucocorticoides/administração & dosagem , HumanosRESUMO
Corticosteroids remain the mainstay of the management of patients with uveitis. Topical corticosteroids are effective in the control of anterior uveitis, but vary in strength, ocular penetration and side effect profile. Systemic corticosteroids are widely used for the management of posterior segment inflammation which requires treatment, particularly when it is associated with systemic disease or when bilateral ocular disease is present. However, when ocular inflammation is unilateral, or is active in one eye only, local therapy has considerable advantages, and periocular injections of corticosteroid are a useful alternative to systemic medication and are very effective in controlling mild or moderate intraocular inflammation. More recently, the injection of intraocular corticosteroids such as triamcinolone have been found to be effective in reducing macular oedema and improving vision in uveitic eyes which have proved refractory to systemic or periocular corticosteroids. The effect is usually transient, lasting around 3 months, but can be repeated although the side effects of cataract and raised intraocular pressure are increased in frequency with intraocular versus periocular corticosteroid injections. This has led to the development of new intraocular corticosteroid devices which are designed to deliver sustained-release drugs and obviate the need for systemic immunosuppressive treatment. The first such implant was Retisert, which is surgically implanted (in the operating theatre) and is designed to release fluocinolone over a period of about 30 months. More recently, Ozurdex, a 'bioerodible' dexamethasone implant which can be inserted in an office setting, has completed phase III clinical trials in patients with intermediate and posterior uveitis. This implant lasts approximately 6 months, and has been found to be effective with a much better side effect profile than Retisert or intravitreal triamcinolone injection, at least for one injection.
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Sistemas de Liberação de Medicamentos , Glucocorticoides/uso terapêutico , Uveíte/tratamento farmacológico , Glucocorticoides/administração & dosagem , Humanos , Injeções IntravítreasRESUMO
The P2X7 receptor is a ligand-gated cation channel that is normally expressed by a variety of immune cells, including macrophages and lymphocytes. Because it leads to membrane blebbing, release of IL-1beta, and cell death by apoptosis or necrosis, it is a potential therapeutic target for a variety of inflammatory diseases. Although the P2X7 receptor is usually not detectable in normal renal tissue, we previously reported increased expression of both mRNA and protein in mesangial cells and macrophages infiltrating the glomeruli in animal models of antibody-mediated glomerulonephritis. In this study, we used P2X7-knockout mice in the same experimental model of glomerulonephritis and found that P2X7 deficiency was significantly renoprotective compared with wild-type controls, evidenced by better renal function, a striking reduction in proteinuria, and decreased histologic glomerular injury. In addition, the selective P2X7 antagonist A-438079 prevented the development of antibody-mediated glomerulonephritis in rats. These results support a proinflammatory role for P2X7 in immune-mediated renal injury and suggest that the P2X7 receptor is a potential therapeutic target.
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Glomerulonefrite/fisiopatologia , Receptores Purinérgicos P2/fisiologia , Animais , Feminino , Glomerulonefrite/prevenção & controle , Macrófagos/metabolismo , Masculino , Camundongos , Camundongos Knockout , Antagonistas do Receptor Purinérgico P2 , Piridinas/farmacologia , Piridinas/uso terapêutico , Ratos , Receptores Purinérgicos P2X7 , Tetrazóis/farmacologia , Tetrazóis/uso terapêuticoRESUMO
A patient undergoing chemotherapy for treatment of acute lymphocytic leukemia developed septicemia that was treated with linezolid for 16 days. The patient subsequently reported reduced vision in both eyes and was found to have bilateral optic neuropathy. After the discontinuation of linezolid treatment, both the optic neuropathy and visual impairment resolved without sequelae.
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Acetamidas/efeitos adversos , Antibacterianos/efeitos adversos , Doenças do Nervo Óptico/induzido quimicamente , Oxazolidinonas/efeitos adversos , Leucemia-Linfoma Linfoblástico de Células Precursoras/complicações , Sepse/tratamento farmacológico , Acetamidas/uso terapêutico , Adulto , Antibacterianos/uso terapêutico , Feminino , Humanos , Linezolida , Oxazolidinonas/uso terapêutico , Adulto JovemRESUMO
OBJECTIVE: A pilot study to evaluate the use of intravitreal methotrexate (MTX) for the treatment of uveitis and uveitic cystoid macular edema (CME). DESIGN: Prospective, consecutive, interventional case series. PARTICIPANTS: Fifteen eyes of 15 patients with a unilateral exacerbation of noninfectious intermediate, posterior uveitis, or panuveitis and/or CME such that visual acuity (VA) was 20/40 or worse, together with a history of increased intraocular pressure (IOP) in response to corticosteroid administration. INTERVENTION: Intravitreal injection of 400 microg in 0.1 ml MTX. MAIN OUTCOME MEASURES: The primary outcome measure was VA (using the Early Treatment Diabetic Retinopathy Study chart). Other outcome measures included ocular inflammation scores, time to relapse, levels of systemic corticosteroid and immunosuppressive therapy, and ocular coherence tomography. Potential complications of intravitreal MTX injection, including cataract progression, vitreous hemorrhage, retinal detachment, and corneal epitheliopathy, were assessed. RESULTS: VA improved at all time points and was statistically significant at the 3- and 6-month follow-up examinations. The mean visual improvement was 4 lines at 3 months and 4.5 lines at 6 months, with no statistical difference between the best VA obtained after MTX injection and after previous corticosteroid treatment, including intravitreal triamcinolone acetate injection. Five patients relapsed after a median of 4 months; a similar improvement was seen after re-injection. Ocular inflammation scores improved at all time points, and systemic immunosuppressive medication was reduced in 3 of 7 patients taking this at the start of the trial. CONCLUSIONS: In patients with uveitis and uveitic CME, intravitreal MTX can improve VA and reduce CME and, in some patients, allows the reduction of immunosuppressive therapy. Relapse occurs at a median of 4 months in some patients, but reinjection has similar efficacy.
Assuntos
Imunossupressores/uso terapêutico , Edema Macular/tratamento farmacológico , Metotrexato/uso terapêutico , Uveíte/tratamento farmacológico , Adulto , Idoso , Feminino , Seguimentos , Glucocorticoides/administração & dosagem , Humanos , Imunossupressores/efeitos adversos , Injeções , Pressão Intraocular/fisiologia , Edema Macular/fisiopatologia , Masculino , Metotrexato/efeitos adversos , Pessoa de Meia-Idade , Projetos Piloto , Estudos Prospectivos , Tomografia de Coerência Óptica , Resultado do Tratamento , Uveíte/fisiopatologia , Acuidade Visual/fisiologia , Corpo VítreoRESUMO
Importance: Melanoma-associated retinopathy (MAR) is a paraneoplastic syndrome in which antiretinal antibodies crossreact with retinal ON-bipolar cells, resulting in night blindness and progressive visual field loss. Current therapeutic options include cytoreductive surgery in combination with immunoglobulin, corticosteroids, or plasmapheresis, but their effectiveness is limited and may be contraindicated, given the possible protective role of circulating autoantibodies against metastatic spread. We report 3-year follow-up of the first case (to our knowledge) of MAR treated with intravitreal long-acting steroid implants. Objective: To report on a patient with MAR who was treated with intravitreal fluocinolone acetonide implants in the absence of systemic immunosuppression. Design, Setting, and Participants: This is a 3-year follow-up of a 73-year-old woman with a history of surgical excision of a malignant melanoma of the left pinna who presented with visual symptoms of shimmering and nyctalopia. Fundus examination, fundus autofluorescence, and optical coherence tomography were normal, with no evidence of cystoid macular edema. Automated perimetry showed a reduction in visual field and full-field electroretinography (ERG) demonstrated findings consistent with generalized ON-bipolar cell dysfunction, typical of MAR. The patient was treated with bilateral fluocinolone acetonide intravitreal implants. Main Outcomes and Measures: Visual acuity, visual field, and electroretinography testing for 3 years after treatment. Results: Visual fields improved in this 73-year-old patient from 20/30 (Snellen measured as 6/9) OD and 20/16 (6/5) OS at baseline to 20/20 OU within 1 week of treatment. Detailed electroretinography monitoring indicated characteristic abnormalities that partly resolved after treatment, consistent with improved inner retinal ON-bipolar cell function. Bilateral cataracts developed approximately 2 years after injection; cataract surgery was performed uneventfully. At 3 years posttreatment, the patient remained visually stable and in systemic disease remission, with best-corrected visual acuity remaining at 20/20 OU. Conclusions and Relevance: We report what is, to our knowledge, the first case of MAR treated with intravitreal slow-release corticosteroid implants, which shows improvements in visual symptoms, visual fields, and retinal function. Sustained-release intraocular steroid implants may offer an effective and safe alternative to systemic immunosuppression in MAR, although results from 1 case should be generalized with abundant caution.