Cytokine and Visual Outcome Variations in Eyes Receiving Aflibercept

Sponsor
Unity Health Toronto
Study ID
NCT03056079
Phase
PHASE4
Status
Unknown

Conditions

Eligibility Criteria

Sex
ALL
Age
18 Years - N/A
Healthy Volunteers
Not accepted

Interventions

  • Intravitreal aflibercept — DRUG
    Patients will receive intravitreal aflibercept on a variable dosing regimen and have aqueous humor sample obtained for cytokine analysis at every visit when an intravitreal injection is done.

Study Details

Objective: To determine the association between baseline aqueous cytokine levels and treatment intervals for patients under a variable dosing regimen with intravitreal aflibercept in patients with neovascular age-related macular degeneration (nAMD), macular edema secondary to retinal vein occlusion (RVO) and diabetic macular edema (DME). Methods: A prospective, single-centre study will be performed containing 3 sub-studies according to each study population: nAMD, macular edema secondary to RVO and DME. Inclusion criteria are: patients followed at St. Michael's Hospital with the diagnosis of nAMD, macular edema secondary to RVO or DME. Patients will be excluded if visual acuity is worse than counting fingers, with macular pathologies causing any structural changes to the retina, have received anti-VEGF injections or photocoagulation therapy 6 months prior to study, intraocular surgery 3 months prior to study, any history of vitreoretinal surgery or ocular inflammation in the study eye, use of systemic or topical anti-inflammatory or steroids, patients on dialysis for renal failure, allergy to the study drug or fluorescein, \<18 years old, women who are pregnant. All patients will be treated with aflibercept intravitreal injections on a variable dosing regimen: Patients with DME will be examined monthly and receive mandatory injection for the first three months (baseline, weeks 4 and 8). Afterwards, they will continue to be seen monthly and the need for new injections will be decided upon the clinical findings at each visit. An anterior chamber (AC) tap will be done if an injection is required at the visit. Patients with nAMD and RVO will be examined monthly and receive mandatory injection for the first three months. From weeks 12 until 72 (month 18), the visits will be scheduled at increasing 2-weeks intervals based on the stability of the ocular condition and response to treatment. At each visit, an injection and AC tap will be performed. The maximum interval in between injections is 12 weeks. If the disease becomes unstable, the interval in between injections is shortened and, once it stabilizes, the treatment frequency is extended again. In all patients, baseline aqueous humour specimens will be obtained prior to the first aflibercept intravitreal injection and follow-up samples will be taken immediately prior to subsequent injections based on the treatment regimens for cytokine analysis in the end of the follow-up.

Key Dates

Start date
Feb 28, 2017
Status verified
Apr 2021
Primary completion
Feb 28, 2024
Completion
Feb 28, 2024

Study Design

Enrollment
168 participants (estimated)
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT

Arms

  • Other: AMD/RVO/DME
    Patients presenting to St. Michael's Hospital retina clinic with neovascular AMD, macular edema secondary to retinal vein occlusion and diabetic macular edema treated with intravitreal aflibercept in a variable dosing regimen.

Primary Outcome Measure

Association between cytokine levels and optimal treatment interval [ Time Frame: 18 months ]

Central Contacts

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