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Update in treatment of uveitic macular edema
Authors Koronis S , Stavrakas P , Balidis M, Kozeis N , Tranos PG
Received 1 September 2018
Accepted for publication 15 January 2019
Published 19 February 2019 Volume 2019:13 Pages 667—680
Checked for plagiarism Yes
Review by Single anonymous peer review
Peer reviewer comments 3
Editor who approved publication: Professor Manfred Ogris
Spyridon Koronis,1 Panagiotis Stavrakas,2 Miltiadis Balidis,1 Nikolaos Kozeis,1 Paris G Tranos1
1Ophthalmica Eye Institute, Thessaloniki, Greece; 2Department of Ophthalmology, Attikon University Hospital, Athens, Greece
Abstract: Macular edema (ME) represents the most common cause for visual loss among uveitis patients. The management of uveitic macular edema (UME) may be challenging, due to its often recalcitrant nature. Corticosteroids remain the mainstay of treatment, through their capability of effectively controlling inflammation and the associated ME. Topical steroids may be effective in milder cases of UME, particularly in edema associated with anterior uveitis. Posterior sub-Tenon and orbital floor steroids, as well as intravitreal steroids often induce rapid regression of UME, although this may be followed by recurrence of the pathology. Intravitreal corticosteroid implants provide sustained release of steroids facilitating regression of ME with less frequent injections. Topical nonsteroidal anti-inflammatory drugs may provide a safe alternative or adjuvant therapy to topical steroids in mild UME, predominantly in cases with underlying anterior uveitis. Immunomodulators including methotrexate, mycophenolate mofetil, tacrolimus, azathioprine, and cyclosporine, as well as biologic agents, notably the anti-tumor necrosis factor-α monoclonal antibodies adalimumab and infliximab, may accomplish the control of inflammation and associated ME in refractory cases, or enable the tapering of steroids. Newer biotherapies have demonstrated promising outcomes and may be considered in persisting cases of UME.
Keywords: uveitis, macular edema, treatment, corticosteroids, dexamethasone implant, NSAIDs, anti-TNFα, interferons
Macular edema (ME) is a common complication of a broad spectrum of clinical entities. In uveitis patients, it represents the most common cause for permanent visual loss, resulting in remarkable visual disability and compromise of their quality of life.1
ME is defined as a thickening of the macular region, which results from a breakdown of the outer and/or inner blood–retina barrier, leading to increased permeability of the retinal pigment epithelium and the retinal vasculature. The consequent leaking from perifoveal capillaries leads to the accumulation of intracellular and extracellular fluid.
Uveitis is an inflammatory ocular disease of variable etiology, with an incidence estimated at 17–52 cases per 100,000 persons per year and an annual prevalence of 69.0–114 per 100,000 persons.2–5
Uveitis may be of infectious etiology or associated with autoinflammatory or autoimmune diseases. Inflammation may involve exclusively the ocular tissues or may constitute a manifestation of systemic disorders.6,7
Severe visual impairment has been reported to affect up to 35% of uveitis patients, while it is estimated that uveitis accounts for up to 10% of legal blindness in developed countries.2,3,8,9 Reports indicate that up to 42% of uveitis patients with vision lower than 20/60 have developed clinically significant ME.1,8–12
ME may complicate any type of uveitis, affecting up to 30% of all uveitis patients; however, its prevalence varies depending on the underlying cause.1,8,10 The incidence of ME by anatomical type of uveitis has been summarized in Table 1.
Table 1 Macular edema incidence by anatomical type of uveitis1,8
Diagnosis and imaging
ME can be detected by slit-lamp biomicroscopy, which may reveal a localized expansion of the retinal space in the macular area. Radially oriented intraretinal cysts in the foveal region may be identified by a reduced central reflex adjacent to a thin, highly reflective edge.13,14 Ancillary imaging tests include, predominantly, fluorescein angiography (FA) and optical coherence tomography (OCT) (Figures 1 and 2). The latter has become the preferred imaging modality for the evaluation and monitoring of uveitic macular edema (UME), due to its noninvasive nature, quantifiable results, and reproducibility. OCT accurately delineates alterations in the macular anatomy and reveals coexisting pathology of the vitreoretinal interface, including vitreomacular traction and epiretinal membranes. FA is the preferred method to evaluate macular ischemia, as well as activity of uveitis. On FA, UME is depicted with the characteristic petaloid pattern of fluorescein leakage.15,16
Figure 1 Optical coherence tomography of a 28-year-old male with Vogt-Koyanagi-Harada choroidopathy showing multilobulated serous retinal detachment involving the macula.
Figure 2 Fluorescein angiography of a 46-year-old female with sarcoidosis showing diffuse fluorescein pooling and leakage (A) and intraretinal fluid accumulation at the macula on optical coherence tomography (B).
These two methods are very sensitive in presenting different pathologic characteristics of ME, and thus are not interchangeable, but complement each other. Kozak et al and later Kempen et al compared FA with OCT, as well as with the clinical evaluation and noted that the results from the two imaging techniques agreed only moderately, while the evaluation from clinicians was associated with significant number of both false positive and false negative cases. They concluded that ancillary testing may be justified in cases suspicious for ME, regardless of biomicroscopic findings.17,18 In such suspect cases, a negative result of one test (FA or OCT) may be an indication to perform the remaining.15 Indocyanine green angiography may be of some use in ME imaging (Figures 1–5) in conjunction with FA, in an attempt to determine the potential involvement of the choroid in the inflammatory process.15,19 Roesel et al used fundus autofluorescence as a noninvasive test adjacent to OCT, but it was able to identify 50% of all angiographically proven cases of ME.20 Fundus-related microperimetry has also been used in eyes with ME, as a means to monitor the functional damage caused by ME.21
Figure 4 Color photo of an 18-year-old female with pars planitis showing snowball-like vitreous accumulations over the posterior pole (A) and optical coherence tomography demonstrating vitreoretinal traction with macular thickening (B).
Corticosteroids are the mainstay of treatment in noninfectious uveitis complicated by ME. Through their remarkable immunosuppressive and anti-inflammatory capabilities and with a variety of administration pathways available, steroids are associated with significant functional and anatomical improvement of ME in the majority of cases.22–24
The use of topical corticosteroids is largely reserved for milder forms of UME, usually associated with anterior uveitis.
Topical 0.05% difluprednate has been shown to have great ocular tissue penetration and very promising results, similar to prednisolone 1%, for the treatment of UME.25–27 The largest clinical trial for the efficacy of topical 0.05% difluprednate in the treatment of UME was conducted by Schallhorn et al, who reported a decrease of CMT and improvement or resolution of UME in the majority of the patients.28
Although topical corticosteroids appear an acceptable substitute to intraocular corticosteroids, predominantly in milder cases of UME, they are not free of adverse events (AEs). These include cataract formation and intraocular pressure (IOP) elevation, which necessitates close monitoring of patients undergoing this treatment.25,28–30
Periocular corticosteroids can be delivered through many routes, including sub-Tenon, subconjunctival, orbital floor, trans-septal, and retrobulbar injections.31 Sen et al, in a multicenter retrospective study, reported similar results between the various administration pathways for periocular steroid injections, most commonly using 40 mg triamcinolone acetonide.23 Improvement of UME may be observed as soon as 4 weeks up to few months following the injections.23,32 Although periocular corticosteroids are usually effective in controlling UME, recurrences are common and repeat injections are frequently required in the course of the disease.
Cataract progression and ocular hypertension may develop following periocular administration of steroids.23,32,33 Although antiglaucoma medication is usually effective for most patients with steroid-induced elevation of IOP, few cases may eventually require surgical intervention.32,33 Upper eyelid ptosis is a common, but under-reported AE, more frequently associated with posterior sub-Tenon delivery of steroids. Despite its commonly self-limiting nature, in rare cases it may persist and require surgery.34 Other more rare AEs include vitreous hemorrhage, retinal detachment, and endophthalmitis.32
Intravitreal (IVT) corticosteroid administration has been described by many trials as an effective way to control ME in noninfectious uveitis, especially in unilateral cases.
Initial reports evaluated the efficacy of 2 and 4 mg triamcinolone acetonide IVT injections against UME, both in adults and in children.35–40 Shin et al, in a randomized, controlled trial, compared the combination of IVT triamcinolone and systemic treatment vs systemic therapy alone. They noted that the former was associated with faster reduction of CRT, although this was not accompanied with a significant improvement of best-corrected visual acuity (BCVA).41
In a retrospective study comparing the efficacy of IVT vs orbital floor triamcinolone, IVT delivery appeared to be more effective, but was associated with an increased incidence of AEs.42
IVT corticosteroid implants
A variety of slow-release IVT implants has recently become available, assuring prolonged efficacy through more sustained results (Figure 3). Ozurdex® (Allergan, Dublin, Republic of Ireland) is a fully biodegradable implant containing 0.7 mg dexamethasone, which can be administered through the pars plana, by a 22-gage applicator device. Dexamethasone is gradually released for a period of up to 6 months, although real-life studies have showed that in the majority of cases a possible reinjection is required between 4 and 6 months following the initial injection.43,44 The safety and efficacy of the implant in noninfectious uveitis were demonstrated by Lowder et al and the HURON study group, while a number of studies showed that it may effectively control ME secondary to noninfectious uveitis in both adults and children.30,45–47
Ozurdex constitutes an efficacious treatment option against UME in eyes that have undergone pars plana vitrectomy (PPV), as it appears to have similar dissolution rates in vitrectomized and nonvitrectomized eyes.43,48,49
The nonbiodegradable fluocinolone implant, Retisert® (Bausch & Lomb, Rochester, NY, USA), was designed to offer local therapy for noninfectious uveitis, obviating the risk of systemic side-effects. It is surgically implanted through the pars plana and releases steroid into the vitreous cavity for 2½–3 years.50,51 This fluocinolone implant was found to improve UME in the majority of cases, concurrently enabling reduction of systemic and periocular treatment.51–53
Although corticosteroid use is approved for the treatment of noninfectious uveitis, some retrospective studies reported the use of IVT dexamethasone implants for the treatment of persistent ME secondary to infectious uveitis. Fonollosa et al reported a small retrospective series of persisting ME complicating infectious uveitis of various etiologies, including Herpes simplex virus-type 1, Varicela-Zoster virus, Treponema pallidum, Brucella melitensis, Borrelia burgdorferi, Toxoplasma gondii, and Cytomegalovirus. Visual acuity (VA) and CMT were significantly improved in all cases while reactivation of the infection did not occur in none of the participants.54 Similar results were reported by Agarwal et al in a retrospective study of ten eyes with ME secondary to tubercular uveitis. IVT dexamethasone implants were administered as an adjunct to antitubercular therapy, which successfully decreased CMT and improved VA.55
Systemic corticosteroids are considered very effective in controlling UME, but burden the patients with systemic AEs, especially in cases of long-term use. The most prominent AEs include Cushing syndrome, hypertension, infection due to immunosuppression, diabetes mellitus, osteoporosis, and atherosclerosis.56 Due to these potential complications, systemic corticosteroids are more commonly used in cases of bilateral UME. Nonetheless, it is recommended that their administration in high doses should be short-term, if possible, while the patients have to be closely monitored for the various AEs of the medication.
Topical NSAIDs may be used for the treatment of UME, predominantly in milder cases or as adjuncts to steroids. NSAIDs reduce intraocular inflammation through the inhibition of the enzymes cyclooxygenase 1 and 2, which stimulate the production of prostaglandins, increasing vascular permeability and eventually leading to development of ME. A recent retrospective review evaluated the use of topical nepafenac 0.1% for the treatment of ME associated with various forms of uveitis, among which anterior uveitis was the most prominent. The authors concluded that although topical nepafenac 0.1% led to a small functional and anatomical improvement, this did not reach statistical significance, emphasizing the need for larger prospective studies.57
Other topical NSAIDs, including bromfenac and indomethacin 0.5%, have also been investigated in the treatment of UME. Radwan et al showed that topical bromfenac is not effective alone for the treatment of UME, but suggested a potential synergy with steroids and anti-vascular endothelial growth factor (VEGF) agents, the former being associated with slightly better anatomical results.58 The administration of topical indomethacin 0.5% four times daily has shown superior results to the placebo group, improving BCVA, decreasing CMT, while being free of AEs, with only one case of irritation during the first month of administration.59
IVT administration of 500 μg/0.1 mL diclofenac was evaluated for the treatment of UME by a number of prospective clinical studies. Despite the good safety profile, the improvement in VA and CMT was not significant in the majority of studies.60–62
Oral acetazolamide, a carbonic anhydrase inhibitor, was first described in 1988 as an alternative treatment for recalcitrant UME predominantly associated with idiopathic uveitis.63 Most studies administered 500 mg once or twice per day, reporting that some patients might need a maintenance dosage ranging from 125 to 500 mg daily. The favorable results presented by older prospective and retrospective studies were also recently reproduced and recorded with the aid of spectral domain OCT.64–66 In contrast, other prospective studies failed to link acetazolamide with an improvement of VA, although a small, significant reduction of the ME was noted.67 Systemic AEs due to acetazolamide include gastroinstestinal disroders, dysgeusia, paresthesia, hypokalemia, and mild depression, which may in few cases lead to discontinuation of the therapy.63,64
Noncorticosteroid, nonbiologic immunomodulatory agents
A number of nonbiologic immunomodulatory agents have been described for the treatment of uveitis, when corticosteroids alone are not able to suppress the inflammation.
Azathioprine (AZA) is a purine analog, able to reduce the peripheral T and B lymphocytes and their reactivity, as well as to downregulate IL-2 synthesis and the production of IgM.68 Along with its well-established efficacy in noninfectious uveitis, a protective effect against the development of ME in uveitic eyes has also been described.69–72 The most common AEs include gastrointestinal disturbances, but AZA can also lead to serious hepatotoxicity, a common reason for discontinuation of this agent. Larger doses of AZA may lead to bone marrow suppression, while a potential increase in risk of non-Hodgkin lymphoma has also been reported.56
Methotrexate (MTX) is a folic acid analog, acting as a dihydrofolate reductase inhibitor, exerting immunosuppressive effect by inhibition of leukocyte division. It may effectively control ocular inflammation and reduce ME development in uveitic eyes through oral, subcutaneous (SC), and intramuscular administration.56,73 The main AEs of systemic MTX include gastrointestinal disturbances, hepatotoxicity, cytopenia, and interstitial pneumonia.56
Intravitreally delivered MTX has shown promising results, controlling uveitis and leading to at least partial remission of ME. In both available studies, relapse of ME was delayed up to 18 months and when encountered was controlled through reinjection.74,75
Mycophenolate mofetil (MMF) is an inhibitor of the purine synthesis pathway, which is proven to be very effective in an array of ocular inflammatory conditions, enabling tapering or cessation of steroids.76,77 MMF has also been successfully used for recalcitrant cases of UME, leading to partial or complete resolution in most patients.78,79 However, retrospective studies evaluating its long-term efficacy reported conflicting results. Neri et al described good ME control throughout the 1 year follow-up.79 On the contrary, Doycheva et al presented less favorable outcomes despite standard MMF dosage, with frequent recurrences of ME after the first year of follow-up, as well as cases of newly developed ME during recurrences of inflammation.80 Frequent monitoring of liver function tests and full blood count is required, as MMF may affect the gastrointestinal tract or may be linked to malignancies, leukopenia, and opportunistic infections.56
Cyclosporine A, a natural product from fungi that exerts immunosuppression acting as a T-cell inhibitor, is an effective treatment for noninfectious, sight-threatening uveitis, administered orally at 2–5 up to 10 mg/kg/day.81–83 Its efficacy in uveitic patients was first described in 1983 showing comparable results with systemic steroids in the management of inflammation, improving UME or protecting uveitic patients from the development of macular thickening.72,83,84 The most serious AE of cyclosporine is its nephrotoxicity, while hypertension may also occur.56
Tacrolimus is a macrolide with T lymphocyte inhibiting properties similar to cyclosporine. It is administered orally and constitutes an effective therapeutic alternative for uveitis, even as monotherapy, sparing steroid AEs.56,85 The efficacy of systemic tacrolimus is reportedly similar to cyclosporine with a potentially better safety profile.86 The effect of tacrolimus on UME, although not thoroughly covered in the literature, may be favorable. Many uveitis studies that included eyes with UME showed improved VA, without though specifying the effects of tacrolimus on ME.86,87 It should be noted that systemic use of tacrolimus requires frequent monitoring of serum drug levels in order to ensure that therapeutic levels are reached and maintained. AEs include nephrotoxicity, neurotoxicity, gastrointestinal disturbances, and hyperglycemia.56
Sirolimus is a macrolide and an inhibitor of the mammalian target of rapamycin that exerts immunosuppressive properties similar to cyclosporine and tacrolimus, inhibiting T lymphocytes.88 The evidence available for systemic and regional tacrolimus for the treatment of uveitis and ME is limited. Systemic sirolimus was linked with severe AEs in higher doses, but managed to control inflammation and improve ME in the majority of the remaining patients.89,90 The two SAVE studies reported promising inflammation control through IVT and SC delivery of sirolimus. In contrast, the initial UME improvement was not maintained beyond the second month in most cases, indicating that frequent IVT reinjections may be required. IVT sirolimus was associated with a better safety profile, compared to SC delivery.91,92 The potential AEs of systemic sirolimus are dose-dependent and include anemia, leucopenia, thrombocytopenia, hypercholesterolemia, arthralgias, and extremity edema. Very rarely, pulmonary toxicity, angioedema, and nephrotoxicity were associated with sirolimus.93
Type I interferons (IFNs) are intracellular cytokines that exert an important role in the regulation of both innate and adaptive immune response, as well as in the stabilization of the blood–retina barrier.94,95 IFN alpha-2a and IFN alpha-2b subtypes were first described as an adjunctive treatment option for uveitis refractory to conventional treatment in cases of ocular Behçet’s disease. These reports included cases of UME, which regressed within 4 weeks of the initial IFN treatment.96,97 Further studies showed improvement of VA with ME resolution in most patients, which subsequently enabled tapering of systemic steroids.98–101 The administration of IFN-α2a as monotherapy was also compared with systemic corticosteroids and no treatment in the BIRDFERON trial. Both agents resulted in significant anatomic and visual improvement as opposed to baseline and to no treatment, while the outcomes did not differ significantly between the two treatment groups.102 Similar outcomes were presented for IFN alpha-2b against ME associated with a wide range of uveitic conditions, although the cumulative evidence is smaller. The largest study included cases of Behçet’s disease uveitis treated with both IFN alpha-2a and IFN alpha-2b, without differentiating between the two agents. Nonetheless, UME resolved in all reported cases.103–105 Recently, a randomized, controlled trial demonstrated superiority of IFN beta-1a over MTX in the treatment of ME complicating intermediate uveitis. Despite the small sample, IFN results were significantly better regarding macular thickness, whereas functional outcome was marginally superior to MTX.106 AEs are very common among patients, but are dose-dependent and improve in most cases without requiring discontinuation of therapy. These include flu-like syndrome, depression, sometimes requiring treatment, elevation of liver enzymes, leukopenia, and alopecia.107
Tumor necrosis factor-α antagonists
Tumor necrosis factor-α (TNF-α) is a proinflammatory cytokine, which is involved in the pathogenesis of noninfectious uveitis, among other conditions.108 Infliximab is a mouse-human chimeric IgG1 monoclonal antibody (mAb) against TNF-α, administered intravenously, and adalimumab is a human IgG1 mAb against TNF-α administered subcutaneously. Systemic administration of both agents has demonstrated efficacy against uveitis and UME and is usually reserved for recalcitrant cases where steroid and/or other immunosuppressive treatment is ineffective or not tolerated. Treatment is usually maintained for approximately 2 years and most studies report adequate control of inflammation, as well as improvement of VA and CMT sustained throughout the follow-up period.109–115
The evidence for IVT administration of anti-TNF-α agents in UME is limited. A small prospective study reported that despite the initial positive response to IVT infliximab, the effect was transient and ME recurred within 6 months.116 Similarly, IVT administration of adalimumab did not gain acceptance, because its use was associated with mixed results, ranging from no efficacy to significant improvement in some cases.117,118
Other anti-TNF-α agents that have been used with limited evidence include golimumab, which provided successful results in a case report of UME that conventional treatment and adalimumab failed to control, and etanercept, which was found to be ineffective in uveitis treatment.119
Serious AEs from systemic use of anti-TNF-α agents include malignancies, infections (notably tuberculosis), and autoimmune diseases.119
IL-1, and its subtypes IL-1α and IL-1β, are cytokines with strong proinflammatory activity. IVT injections of IL-1β resulted in breakdown of the blood–retina barrier, hence anti-IL-1β agents have been considered for the treatment of uveitis and UME.120 Gevokizumab is an anti-IL-1β mAb available for SC use, usually at 60 mg doses per month. Most studies focused on its successful use for the treatment of refractory Behçet’s disease uveitis, with the largest one including cases with coexistent ME. Gevokizumab reduced inflammation and prevented the development of ME, an effect retained throughout the six-month follow-up, albeit without reaching statistical significance as opposed to the control group. No serious AEs were reported.121,122
IL-6 is also a proinflammatory cytokine, which has been implicated in the development of autoimmune diseases, including uveitis.123 The anti-IL-6 mAb tocilizumab, infused intravenously at 8 mg/kg/4 weeks, demonstrated efficacy in retrospective series of UME cases refractive to conventional treatment.124–126 The reported improvement was maintained for up to 24 months in the follow-up, although discontinuation of tocilizumab led to recurrence of ME, which resolved in all cases following reinstitution of treatment. Generally, no major AEs have been reported, with the exception of rare cases of neutropenia and pneumonia.125,127
Daclizumab is an mAb with anti-IL-2 activity. Most studies demonstrated a potential efficacy of SC and intravenous daclizumab against noninfectious uveitis.128–132 In contrast, a double-masked, randomized study on Behçet’s disease uveitis reported nonsignificant benefits from intravenous daclizumab compared to placebo.133 Evidence of its effect on UME is rather limited. A long-term study that included 19 eyes with UME reported mixed results. Intravenous and SC daclizumab managed to slightly reduce CMT, but not FA leakage in the majority of cases. It is important to note that in this study, 4 out of 39 patients developed malignancies, on an average of 26 months after the initiation of treatment.131
IVT anti-VEGF therapy has become the mainstay of treatment for various retinal disorders, including neovascular age-related macular degeneration, retinal vein occlusion, and diabetic ME.134 As VEGF is a mediator proven to play a role in the inflammatory process, anti-VEGF agents have been proposed as possible therapeutic alternatives for the management of UME, especially when corticosteroids are contraindicated due to underlying glaucoma or systemic AEs. Nevertheless, particularly in more severe cases, most studies report a suboptimal or transient response of UME, which required multiple injections to maintain the positive outcomes.135–138
Other biologic agents
Rituximab is an mAb that targets the CD20 protein, a molecule found on mature B cells.139 Case reports and small case studies have shown that rituximab may be an effective option for the management of noninfectious uveitis and UME, when conventional or other immunomodulatory treatment fails to control the inflammation.140,141 Despite the mostly positive evidence, some recent case studies reported the development of ME after rituximab administration for the treatment of Wegener’s granulomatosis and an IgG4-related disease of the sinuses.142,143 The use of rituximab is considered relatively safe, with most AEs being transient reactions to the infusion. Although some cases diagnosed with progressive multifocal leukoencephalopathy have been reported, a meta-analysis failed to demonstrate significant predisposition to systemic infections among patients receiving rituximab.144,145
A small series evaluated the efficacy and safety of efalizumab, an anti-CD11a mAb administered subcutaneously, for the treatment of recalcitrant ME associated with noninfectious uveitis. All six patients experienced improvement of BCVA and reduction of CMT at the end of the 16-week follow-up period. AEs were mild and transient, with lymphocytosis being the most frequent one.146
Results of various studies assessing the systemic use of biologic agents in the treatment of UME are summarized in Table 2.
Pars plana vitrectomy
Despite the amplitude of available pharmacologic treatment options for UME, some cases remain recalcitrant and may warrant surgical intervention. PPV may be indicated for the treatment of uveitis for diagnostic or therapeutic purposes, the latter including the removal of media opacities or epiretinal membranes.147 In cases diagnosed with UME, a standard, three-port PPV is usually performed, while some authors evaluated the effects of internal limiting membrane (ILM) peel. Most studies reported favorable outcomes following PPV in 33%–58% of patients, whereas ILM peel did not appear to differentiate the results.148–151 It has been speculated that the favorable effect of PPV on vision may be a result of media opacities removal. The mechanism of UME regression after PPV is not fully understood, with some evidence pointing toward a decrease of antigen presentation, due to reduction of inflammatory mediators in the vitreous body.152,153
Novel agents under research
Although it has been shown that current treatment practice results in favorable prognosis for a considerable number of patients with UME, the latter remains a potential threat to patients’ vision and a therapeutic challenge for specialists.154 Hence, novel agents are being investigated, while inquiries for the efficacy and safety of many already used agents expand.
ACTHAR gel, a repository adrenocorticotropic hormone injection, is being reevaluated as a treatment option for sarcoidosis.155 An ongoing clinical trial by DA Culver and a retrospective study by JJ Huang aim to assess the effects of this agent in sarcoid uveitis and, as a secondary goal, in associated ME.159,160
The selective janus kinase 1 inhibitor filgotinib, already undergoing Phase III trials for the treatment of rheumatoid arthritis, is being investigated as a possible treatment option for active noninfectious uveitis.156,161 As a secondary outcome, time until development of ME will be evaluated.
Ustekinumab is an mAb targeting the p40 subunit of IL-12 and IL-23 and it is considered a potent and safe treatment option for psoriatic arthritis and Crohn’s disease.157,158 Subcutaneously delivered ustekinumab is currently undergoing a Phase II open-label clinical trial by HN Sen, which aims to assess efficacy as well as effect on ME and CMT, if present.162
ME is a common and potentially sight-threatening complication of acute and chronic uveitis that may persist despite the regression of the inflammation. Corticosteroids, either systemic or regional, remain the mainstay of treatment. However, their AEs and the occasionally recalcitrant nature of UME may lead to a need for more therapeutical options. Nonsteroidal immunomodulators and predominantly the biologic agents are becoming increasingly popular in the therapeutic scheme, reinforcing efficacy and enabling discontinuation or reduction of steroids to maintenance doses. Real-life evidence has demonstrated that currently available treatment modalities with the aid of treatment algorithms (Figure 5) ensure favorable long-term prognosis in the majority of patients with UME.154
The authors report no conflicts of interest in this work.
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