Clinical trial NCT05415826: Ozurdex in Reducing PVR After Vitreotomy in PDR
Official title: Slow-Release Dexamethasone in Reducing Proliferative Vitreoretinopathy After Vitreotomy in Proliferative Diabetic Retinopathy
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: NA
Conditions: Diabetic Retinopathy
Keywords: PDR; PVR; Ozurdex
Lead sponsor: Peking University People's Hospital
Sponsor class: OTHER
First posted: 2022-06-13
Enrollment: 30
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: Diabetic retinopathy is a significant source of visual morbidity in the adult population. Complications of diabetic retinopathy include ischemic maculopathy, macular edema, and sequelae of fibrovascular proliferation, such as vitreous hemorrhage (VH), tractional retinal detachment (TRD), and neovascular glaucoma.Pars plana vitrectomy (PPV) is traditionally performed for nonclearing VH, significant fibrovascular proliferation, refractive macular edema, and/or TRD, particularly if macula-involving. However, the pathogenesis is complex and multifactorial: Pro-infammatory cytokines and chemokines signifcantly contribute to the disease development and promote ischemic changes in the retina. Therefore, there is a potential role for intravitreal steroids in disease modifcation.

Detailed description: Diabetic retinopathy is a significant source of visual morbidity in the adult population. Complications of diabetic retinopathy include ischemic maculopathy, macular edema, and sequelae of fibrovascular proliferation, such as vitreous hemorrhage (VH), tractional retinal detachment (TRD), and neovascular glaucoma.Pars plana vitrectomy (PPV) is traditionally performed for nonclearing VH, significant fibrovascular proliferation, refractive macular edema, and/or TRD, particularly if macula-involving. However, the pathogenesis is complex and multifactorial: Pro-infammatory cytokines and chemokines signifcantly contribute to the disease development and promote ischemic changes in the retina. Therefore, there is a potential role for intravitreal steroids in disease modifcation. Corticosteroids reduce not only leukostasis and infammatory cytokine production, but also VEGF expression. Experimentally, corticosteroids potentially can influence both the inflammatory and the proliferative components of the PVR process via a variety of modes of administration without evidence of demonstrable retinal toxicity. So, this study is carried out for the purpose of investigating the efficacy of slow-release dexamethasone implant in proliferative vitreoretinopathy of postoperative proliferative diabetic retinopathy.

Eligibility criteria: Inclusion Criteria:

* macula off treatment naive TRD second to PDR causing visual loss;
* treated by standardize PPV, endolaser and silicone oil tamponade with or without DEX implant at the end of the surgery within 12 months from diagnosis of TRD;
* Hba1c is less than 10% with type 1 or 2 diabetes mellitus

Exclusion Criteria:

* other concomitant ocular diseases that cause RD ( for example rhegmatogenous retinal detachment, exudative retinal detachment, other causes for TRD);
* any previous injection of DEX implant;
* abnormalities of the vitreoretinal interface, such as epiretinal membrane, vitreomacular traction without RD

Primary outcomes:
measure: PVR
timeFrame: during 3 months after surgery
measure: CRT
timeFrame: from preoperation to 3 months follow-up
Secondary outcomes:
measure: BCVA
timeFrame: from preoperation to 3 months follow-up
measure: Intraretinal hemorrhage
timeFrame: during 3 months after surgery
Other outcomes:
Locations:
Study officials:
affiliation: Peking University People's Hospital
name: Jinfeng Qu, MD
role: STUDY_CHAIR
References:
citation: Moss SE, Klein R, Klein BE. The 14-year incidence of visual loss in a diabetic population. Ophthalmology. 1998 Jun;105(6):998-1003. doi: 10.1016/S0161-6420(98)96025-0.
citation: Fong DS, Ferris FL 3rd, Davis MD, Chew EY. Causes of severe visual loss in the early treatment diabetic retinopathy study: ETDRS report no. 24. Early Treatment Diabetic Retinopathy Study Research Group. Am J Ophthalmol. 1999 Feb;127(2):137-41. doi: 10.1016/s0002-9394(98)00309-2.
citation: Early vitrectomy for severe vitreous hemorrhage in diabetic retinopathy. Four-year results of a randomized trial: Diabetic Retinopathy Vitrectomy Study Report 5. Arch Ophthalmol. 1990 Jul;108(7):958-64. doi: 10.1001/archopht.1990.01070090060040.
citation: Vujosevic S, Simo R. Local and Systemic Inflammatory Biomarkers of Diabetic Retinopathy: An Integrative Approach. Invest Ophthalmol Vis Sci. 2017 May 1;58(6):BIO68-BIO75. doi: 10.1167/iovs.17-21769.
citation: Funatsu H, Yamashita H, Noma H, Mimura T, Nakamura S, Sakata K, Hori S. Aqueous humor levels of cytokines are related to vitreous levels and progression of diabetic retinopathy in diabetic patients. Graefes Arch Clin Exp Ophthalmol. 2005 Jan;243(1):3-8. doi: 10.1007/s00417-004-0950-7. Epub 2004 Jul 17.
citation: Schwartzman ML, Iserovich P, Gotlinger K, Bellner L, Dunn MW, Sartore M, Grazia Pertile M, Leonardi A, Sathe S, Beaton A, Trieu L, Sack R. Profile of lipid and protein autacoids in diabetic vitreous correlates with the progression of diabetic retinopathy. Diabetes. 2010 Jul;59(7):1780-8. doi: 10.2337/db10-0110. Epub 2010 Apr 27.
citation: Goldberg RB. Cytokine and cytokine-like inflammation markers, endothelial dysfunction, and imbalanced coagulation in development of diabetes and its complications. J Clin Endocrinol Metab. 2009 Sep;94(9):3171-82. doi: 10.1210/jc.2008-2534. Epub 2009 Jun 9.
citation: dell'Omo R, Semeraro F, Bamonte G, Cifariello F, Romano MR, Costagliola C. Vitreous mediators in retinal hypoxic diseases. Mediators Inflamm. 2013;2013:935301. doi: 10.1155/2013/935301. Epub 2013 Jan 10.
citation: Albini TA, Abd-El-Barr MM, Carvounis PE, Iyer MN, Lakhanpal RR, Pennesi ME, Chevez-Barrios P, Wu SM, Holz ER. Long-term retinal toxicity of intravitreal commercially available preserved triamcinolone acetonide (Kenalog) in rabbit eyes. Invest Ophthalmol Vis Sci. 2007 Jan;48(1):390-5. doi: 10.1167/iovs.06-0145.