Intravitreal Dexamethasone vs Bevacizumab in Aboriginal People With DMO
NCT ID: NCT04619303
Last Updated: 2020-11-09
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
PHASE4
59 participants
INTERVENTIONAL
2017-02-07
2020-02-14
Brief Summary
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Detailed Description
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DMO is characterised by swelling of the central retina. The hypoxic retinal conditions in diabetic individuals result in structural changes in the vessel walls and a functional impairment of the blood-retinal barrier. The resultant increase in vascular permeability causes retinal oedema, and loss of central vision ensues when oedema involves the macula. Treatment is aimed at reducing visual loss by targeting factors involved in the activated hypoxia pathway, or with laser targeting dysfunctional blood vessels to limit leakage. Laser was the first treatment shown to effectively reduce DMO and improve vision; however, it cannot be applied to the very centre of the macula. More recently, DMO has been shown to respond to intraocular injections with anti-VEGF agents (bevacizumab, ranibizumab, and aflibercept), reducing reliance on laser treatments.
Corticosteroids are anti-inflammatory agents with anti-VEGF and anti-proliferative effects. Unfortunately, the increased rates of cataract and elevated IOP are the main adverse effects of the IVT corticosteroid treatments, including triamcinolone, making this a less-appealing option than anti-VEGF agents. However, their efficacy has been demonstrated in a subgroup of pseudophakic patients with DMO, where triamcinolone plus laser treatment was shown to be superior to laser treatment alone, and equivalent to ranibizumab (alone or with laser treatment). First-line treatment with triamcinolone is also the most cost-effective option for pseudophakic patients. Thus, IVT triamcinolone is considered one of the effective adjunct modalities for the treatment of DMO and has emerged as an alternative therapy to anti-VEGF agents for persistent or refractory DMO.
Ozurdex (Allergan, Irvine, CA, United States) is a unique biodegradable dexamethasone IVT implant. This slow-release preparation of dexamethasone (a highly potent steroid with a short half-life) has greater long-term efficacy than conventional forms of IVT triamcinolone, with the IVT concentration peaking within 3 months and sustained for up to 6 months post injection. This translates clinically to less frequent injections than conventional treatment with monthly IVT triamcinolone. The geography and population being studied in this trial create some unique challenges, which demand a more flexible study protocol. Longer-acting IVT agents such as Ozurdex have the potential to significantly improve DMO-associated visual morbidity with greater feasibility when used for Aboriginal patients with or at risk of DMO.
Conditions
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Keywords
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
DOUBLE
Study Groups
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Dexamethasone Implant
Receive 0.7mg dexamethasone implant (Ozurdex) at baseline visit. Monthly review with repeat administration of intravitreal treatment every three months for DMO and laser as clinically indicated.
Dexamethasone intravitreal implant
Intravitreal injection of 0.7mg dexamethasone implant
Bevacizumab
Receive 1.25mg/0.05ml bevacizumab (Avastin) at baseline visit. Monthly review with repeat administration of intravitreal treatment every one month for DMO and laser as clinically indicated.
Bevacizumab Injectable Product
Invtravitreal injection of 1.25mg/0.05mL bevacizumab
Interventions
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Dexamethasone intravitreal implant
Intravitreal injection of 0.7mg dexamethasone implant
Bevacizumab Injectable Product
Invtravitreal injection of 1.25mg/0.05mL bevacizumab
Other Intervention Names
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Eligibility Criteria
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Inclusion Criteria
* Adults aged 18 years and over
* Diagnosis of DM (type 1 or type 2)
* BCVA of at best 0.2 LogMAR (20/32) 6/9 in the study eye
* Pseudophakic, or phakic with significant lens opacity and scheduled to undergo cataract surgery at the time of enrolment
* Presence of any grade of DR with centre-involving DMO, as defined by clinical examination and OCT scan findings
* Active DMO: Centre-involving/threatening DMO, as defined by clinical examination and OCT scan findings.
* At risk of DMO: Patients scheduled for cataract surgery with non-centre involving DMO who are assessed as being at risk of post-operative centre-involving DMO based on clinical examination, OCT scan findings, and Investigator discretion.
Exclusion Criteria
* IVT anti-VEGF injections within the last six weeks;
* Macular laser treatment within the last four months;
* IVT triamcinolone or triescence within the last six months; at the time of the first trial treatment.
* History of open-angle glaucoma or steroid-induced IOP elevation that required IOP-lowering treatment or, IOP ≥25 (Goldmann applanation) on two consecutive clinic visits.
* Eyes with concurrent ocular pathology other than DMO, or a cataract-causing visual loss, including macular ischaemia as determined by clinical examination and FFA imaging.
* Women who are breastfeeding, confirmed as pregnant or planning on becoming pregnant in the next 6-12 months.
* Participants for whom Ozurdex or Avastin treatment are contraindicated as per product information:
* Active or suspected ocular/periocular infections, including most viral diseases of the cornea and conjunctiva, active epithelia herpes simplex keratitis (dendritic keratitis), vaccinia, varicella, mycobacterial infections, and fungal diseases.
* Aphakic eyes with rupture of the posterior lens capsule.
* Eyes with an anterior chamber intraocular lens and rupture of the posterior lens capsule.
* Known angina, myocardial infarction, TIA or CVA in the last three months.
* Known hypersensitivity to any components of these products.
18 Years
ALL
No
Sponsors
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Lions Outback Vision
UNKNOWN
Allergan
INDUSTRY
Lions Eye Institute, Perth, Western Australia
OTHER
Responsible Party
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A/Prof. Hessom Razavi
Associate Professor
Principal Investigators
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Angus Turner, FRANZCO
Role: STUDY_DIRECTOR
Lions Eye Institute
Locations
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Broome Regional Aboriginal Medical Service
Broome, Western Australia, Australia
Derby Hospital
Derby, Western Australia, Australia
Fitzroy Crossing Hospital
Fitzroy Crossing, Western Australia, Australia
Halls Creek Health Service
Halls Creek, Western Australia, Australia
Bega Garnbirringu Health Service
Kalgoorlie-Boulder, Western Australia, Australia
Nickol Bay Hospital
Karratha, Western Australia, Australia
Ord Valley Aboriginal Health Service
Kununurra, Western Australia, Australia
Laverton Hospital
Laverton, Western Australia, Australia
Derbarl Yerrigan Health Service Inc.
Perth, Western Australia, Australia
Lions Eye Institute Nedlands
Perth, Western Australia, Australia
Lions Eye Institute Midland
Perth, Western Australia, Australia
Mawarnkarra Health Service
Roebourne, Western Australia, Australia
Wirraka Maya Health Service Aboriginal Corporation
South Hedland, Western Australia, Australia
Countries
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References
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Kaidonis G, Mills RA, Landers J, Lake SR, Burdon KP, Craig JE. Review of the prevalence of diabetic retinopathy in Indigenous Australians. Clin Exp Ophthalmol. 2014 Dec;42(9):875-82. doi: 10.1111/ceo.12338. Epub 2014 May 5.
Wong J, Molyneaux L, Constantino M, Twigg SM, Yue DK. Timing is everything: age of onset influences long-term retinopathy risk in type 2 diabetes, independent of traditional risk factors. Diabetes Care. 2008 Oct;31(10):1985-90. doi: 10.2337/dc08-0580. Epub 2008 Jul 15.
Diabetes Control and Complications Trial Research Group; Nathan DM, Genuth S, Lachin J, Cleary P, Crofford O, Davis M, Rand L, Siebert C. The effect of intensive treatment of diabetes on the development and progression of long-term complications in insulin-dependent diabetes mellitus. N Engl J Med. 1993 Sep 30;329(14):977-86. doi: 10.1056/NEJM199309303291401.
Progression of retinopathy with intensive versus conventional treatment in the Diabetes Control and Complications Trial. Diabetes Control and Complications Trial Research Group. Ophthalmology. 1995 Apr;102(4):647-61. doi: 10.1016/s0161-6420(95)30973-6.
Wong TY, Mwamburi M, Klein R, Larsen M, Flynn H, Hernandez-Medina M, Ranganathan G, Wirostko B, Pleil A, Mitchell P. Rates of progression in diabetic retinopathy during different time periods: a systematic review and meta-analysis. Diabetes Care. 2009 Dec;32(12):2307-13. doi: 10.2337/dc09-0615.
Klein R, Klein BE. Blood pressure control and diabetic retinopathy. Br J Ophthalmol. 2002 Apr;86(4):365-7. doi: 10.1136/bjo.86.4.365. No abstract available.
Photocoagulation for diabetic macular edema. Early Treatment Diabetic Retinopathy Study report number 1. Early Treatment Diabetic Retinopathy Study research group. Arch Ophthalmol. 1985 Dec;103(12):1796-806.
Michaelides M, Kaines A, Hamilton RD, Fraser-Bell S, Rajendram R, Quhill F, Boos CJ, Xing W, Egan C, Peto T, Bunce C, Leslie RD, Hykin PG. A prospective randomized trial of intravitreal bevacizumab or laser therapy in the management of diabetic macular edema (BOLT study) 12-month data: report 2. Ophthalmology. 2010 Jun;117(6):1078-1086.e2. doi: 10.1016/j.ophtha.2010.03.045. Epub 2010 Apr 22.
Diabetic Retinopathy Clinical Research Network; Elman MJ, Aiello LP, Beck RW, Bressler NM, Bressler SB, Edwards AR, Ferris FL 3rd, Friedman SM, Glassman AR, Miller KM, Scott IU, Stockdale CR, Sun JK. Randomized trial evaluating ranibizumab plus prompt or deferred laser or triamcinolone plus prompt laser for diabetic macular edema. Ophthalmology. 2010 Jun;117(6):1064-1077.e35. doi: 10.1016/j.ophtha.2010.02.031. Epub 2010 Apr 28.
Elman MJ, Bressler NM, Qin H, Beck RW, Ferris FL 3rd, Friedman SM, Glassman AR, Scott IU, Stockdale CR, Sun JK; Diabetic Retinopathy Clinical Research Network. Expanded 2-year follow-up of ranibizumab plus prompt or deferred laser or triamcinolone plus prompt laser for diabetic macular edema. Ophthalmology. 2011 Apr;118(4):609-14. doi: 10.1016/j.ophtha.2010.12.033.
Dewan V, Lambert D, Edler J, Kymes S, Apte RS. Cost-effectiveness analysis of ranibizumab plus prompt or deferred laser or triamcinolone plus prompt laser for diabetic macular edema. Ophthalmology. 2012 Aug;119(8):1679-84. doi: 10.1016/j.ophtha.2012.01.049. Epub 2012 Apr 13.
Al Dhibi HA, Arevalo JF. Clinical trials on corticosteroids for diabetic macular edema. World J Diabetes. 2013 Dec 15;4(6):295-302. doi: 10.4239/wjd.v4.i6.295.
Chew EY, Benson WE, Remaley NA, Lindley AA, Burton TC, Csaky K, Williams GA, Ferris FL 3rd. Results after lens extraction in patients with diabetic retinopathy: early treatment diabetic retinopathy study report number 25. Arch Ophthalmol. 1999 Dec;117(12):1600-6. doi: 10.1001/archopht.117.12.1600.
Cetin EN, Yildirim C. Adjuvant treatment modalities to control macular edema in diabetic patients undergoing cataract surgery. Int Ophthalmol. 2013 Oct;33(5):605-10. doi: 10.1007/s10792-012-9695-1. Epub 2012 Dec 18.
Chang-Lin JE, Attar M, Acheampong AA, Robinson MR, Whitcup SM, Kuppermann BD, Welty D. Pharmacokinetics and pharmacodynamics of a sustained-release dexamethasone intravitreal implant. Invest Ophthalmol Vis Sci. 2011 Jan 5;52(1):80-6. doi: 10.1167/iovs.10-5285.
Zalewski D, Raczynska D, Raczynska K. Five-month observation of persistent diabetic macular edema after intravitreal injection of Ozurdex implant. Mediators Inflamm. 2014;2014:364143. doi: 10.1155/2014/364143. Epub 2014 Feb 10.
Dutra Medeiros M, Postorino M, Navarro R, Garcia-Arumi J, Mateo C, Corcostegui B. Dexamethasone intravitreal implant for treatment of patients with persistent diabetic macular edema. Ophthalmologica. 2014;231(3):141-6. doi: 10.1159/000356413. Epub 2013 Dec 19.
Zucchiatti I, Lattanzio R, Querques G, Querques L, Del Turco C, Cascavilla ML, Bandello F. Intravitreal dexamethasone implant in patients with persistent diabetic macular edema. Ophthalmologica. 2012;228(2):117-22. doi: 10.1159/000336225. Epub 2012 Feb 3.
Haller JA, Kuppermann BD, Blumenkranz MS, Williams GA, Weinberg DV, Chou C, Whitcup SM; Dexamethasone DDS Phase II Study Group. Randomized controlled trial of an intravitreous dexamethasone drug delivery system in patients with diabetic macular edema. Arch Ophthalmol. 2010 Mar;128(3):289-96. doi: 10.1001/archophthalmol.2010.21.
Boyer DS, Faber D, Gupta S, Patel SS, Tabandeh H, Li XY, Liu CC, Lou J, Whitcup SM; Ozurdex CHAMPLAIN Study Group. Dexamethasone intravitreal implant for treatment of diabetic macular edema in vitrectomized patients. Retina. 2011 May;31(5):915-23. doi: 10.1097/IAE.0b013e318206d18c.
Hariprasad SM, Mieler WF, Grassi M, Green JL, Jager RD, Miller L. Vision-related quality of life in patients with diabetic macular oedema. Br J Ophthalmol. 2008 Jan;92(1):89-92. doi: 10.1136/bjo.2007.122416. Epub 2007 Jun 21.
Chen E, Looman M, Laouri M, Gallagher M, Van Nuys K, Lakdawalla D, Fortuny J. Burden of illness of diabetic macular edema: literature review. Curr Med Res Opin. 2010 Jul;26(7):1587-97. doi: 10.1185/03007995.2010.482503.
Provided Documents
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Document Type: Study Protocol and Statistical Analysis Plan
Related Links
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Australian Bureau of Statistics. Diabetes in Australia: A Snapshot, 2007-08. Cat. no. 4820.0.
Other Identifiers
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OASIS
Identifier Type: -
Identifier Source: org_study_id