Efficacy and Safety Study of Ixoberogene Soroparvovec (Ixo-vec) in Participants With Neovascular Age-Related Macular Degeneration

Phase 3RecruitingNCT06856577

Adverum Biotechnologies, Inc.284 enrolled

Overview

This is a multi-center, randomized, double-masked, active-comparator-controlled, Phase 3 study in a broad participant population (treatment-naïve and treatment-experienced) with neovascular (wet) age-related macular degeneration (nAMD). The study will evaluate a single intravitreal (IVT) injection of Ixo-vec compared to an active comparator. The primary endpoint of this study is the mean change in best corrected visual acuity (BCVA) of Ixo-vec compared to an active comparator measured at an average of Weeks 52 and 56. Safety, tolerability, and efficacy will be evaluated throughout the study.

The primary objective of this study is to evaluate the non-inferiority in efficacy of a single intravitreal (IVT) injection of Ixo-vec 6 x 10\^10 vector genome (vg)/eye compared to an active comparator. Neovascular or wet age-related macular degeneration (nAMD) is a degenerative ocular disease associated with the infiltration of abnormal blood vessels in the retina from the underlying choroid layer and is a leading cause of blindness in patients over 65 years of age. The abnormal angiogenic process in nAMD is stimulated and modulated by vascular endothelial growth factor (VEGF). Treatment of nAMD requires frequent intravitreal (IVT) injections of VEGF inhibitors (anti-VEGF) administered every 4-16 weeks. Ixo-vec (also known as ADVM-022 or AAV.7m8-aflibercept) is a gene therapy product being developed for the treatment of nAMD. Ixo-vec is designed to reduce the current treatment burden which often results in undertreatment and vision loss in patients with nAMD receiving anti-VEGF therapy in clinical practice. Safety, tolerability, and efficacy will be evaluated throughout this study. The primary endpoint of this study is the mean change in best corrected visual acuity (BCVA) of Ixo-vec compared to an active comparator measured at an average of Weeks 52 and 56 post-treatment. Due to the long duration of the Screening period, this study will be considered fully enrolled when randomization has been completed.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

Eligibility

Sex: ALLMin age: 50 Years

Medical Language ↔ Plain English

Inclusion Criteria: 1. Able and willing to provide informed consent (or have a legally authorized representative who is able and willing to provide informed consent) prior to any study assessments and procedures and comply with the study requirements and visits. 2. Male or female with a diagnosis of CNV secondary to nAMD in the study eye, with nAMD disease activity at Screening Visit 1. 3. At least 50 years old at Screening Visit 1. 4. An Early Treatment Diabetic Retinopathy Study (ETDRS) BCVA letter score of 35 - 78 (approximate Snellen equivalent of 20/200 to 20/32) in the study eye at Screening Visit 1. 5. Demonstrated a meaningful anatomic response to anti-VEGF therapy during screening 6. Able to reliably use eye drops per protocol Exclusion Criteria: General Exclusion Criteria 1. History of a medical condition giving reasonable suspicion of a condition that contraindicates the use of Ixo-vec, compromises the participant's ability to comply with the planned study activities, or that might affect the interpretation of the results of the study or render the participant at high risk for treatment complications in the opinion of the Investigator. History of severe coronavirus disease (COVID-19) infection may meet this exclusion criteria if, in the opinion of the Investigator, it is likely to lead to any important complications. 2. Received any prior gene therapy. 3. Prior treatment with any non-gene therapy investigational medicinal product (IMP) or medical device in the study eye within 3 months of Screening Visit 1 or 5 half-lives of the IMP prior to dosing with Ixo-vec, whichever is longer. 4. Female participants who are pregnant or breastfeeding or who intend to become pregnant or breastfeed in the future. 5. History or evidence of any of the following cardiovascular diseases: 1. Myocardial infarction in the 6-month period prior to Week 1. 2. Uncontrolled hypertension defined as systolic blood pressure \> 160 mmHg or diastolic blood pressure \> 100 mmHg during screening. 3. Stroke in the 6-month period prior to Week 1. 6. History of ongoing bleeding disorders. The use of aspirin or other anticoagulants (e.g., Factor Xa inhibitors) is permitted. 7. Use of systemic immunosuppressive drugs within 90 days prior to Screening Visit 1. Short courses of oral corticosteroids are permitted, as well as any inhaled, intra-articular, nasal or dermal steroid use. 8. Evidence of poorly controlled diabetes or glycated hemoglobin (HbA1c) ≥ 8.0% during screening Ocular Exclusion Criteria 1. Any active ocular or periocular infection in the study eye from Screening Visit 1. 2. History or evidence of the following in the study eye: 1. Intraocular or refractive surgery within 5 months prior to Week 1. 2. Any previous penetrating keratoplasty or vitrectomy. 3. Any previous panretinal photocoagulation. 4. Any previous submacular surgery, other surgical intervention (including port delivery system) or laser treatment for age related macular degeneration. 3. Any history or evidence of retinal detachment (with or without repair) or retinal pigment epithelium rip/tear in the study eye, as determined by the Investigator during screening or at Week 1. 4. Uncontrolled ocular hypertension or glaucoma in the study eye from Screening Visit 1 to Week 1 or current use of ≥ 2 IOP lowering medications or normal tension glaucoma/suspect in the study eye or history of any of the following procedures in the study eye prior to Week 1: * Incisional glaucoma surgery (i.e., glaucoma drainage implant/shunt or trabeculectomy) * Ocular angle-based surgery (i.e., goniotomy or canaloplasty) * Minimally Invasive Glaucoma Surgery (MIGS) in the study eye. * Angle-based glaucoma surgery (e.g., Argon or Selective Laser Trabeculoplasty) 5. Any history of intraocular pressure (IOP) elevation related to topical steroid administration in either eye. 6. Any history of uveitis or inflammation (grade trace or above) except mild anticipated post operative inflammation that resolved in either eye. 7. Any history of treatment with complement inhibitors for geographic atrophy in the study eye. 8. Known history of ocular herpes simplex virus, varicella-zoster virus, or cytomegalovirus, including viral uveitis, retinitis, or keratitis in either eye.

Outcomes

Primary Outcomes

Mean change from Baseline in Best-Corrected Visual Acuity (BCVA) based on an average at Weeks 52 and 56

BCVA will be measured using an Early Treatment Diabetic Retinopathy Study (ETDRS) visual acuity chart.

Time frame: Baseline, Week 52 and Week 56

Secondary Outcomes

Mean number of aflibercept IVT injections received

Time frame: Week 4 through Week 56

Percentage of participants with worsened BCVA

BCVA measured by ETDRS

Time frame: Through Week 56

Percentage of participants with improved BCVA

BCVA measured by ETDRS

Time frame: Through Week 56

Mean change from Baseline in BCVA over time based on an average at Weeks 52 and 56

BCVA measured by ETDRS

Time frame: Through Week 56

Mean change from Week 1 in BCVA based on an average at Weeks 52 and 56

BCVA measured by ETDRS

Time frame: Week 1 through Week 56

Percentage of participants with BCVA of 73 letters or more from Week 4 through Week 56

Time frame: Week 4 through Week 56

Mean change in Central Subfield Thickness (CST) from Baseline over time through Week 56

CST as measured by spectral domain optical coherence tomography (SD-OCT)

Time frame: Through Week 56

Percentage of participants with CST ≤ 300 μm over time through Week 56

CST will be assessed by a CRC using SD-OCT

Time frame: Through Week 56

Mean number of CST fluctuations > 50 μm from Week 1 over time through Week 56

CST will be assessed by a CRC using SD-OCT images and the mean number of fluctuations with thickness of more than 50 μm will be summarized

Time frame: Week 1 through Week 56

Percentage of participants with CST fluctuations > 50 μm from Week 1 over time through Week 56

CST will be assessed using SD-OCT

Time frame: Week 1 through Week 56

Percent reduction in mean rate of annualized anti-Vascular Endothelial Growth Factor (VEGF) injections

Percent reduction in mean rate of annualized anti-VEGF injections will be assessed relative to the reduction in mean rate of annualized anti-VEGF injections received in the year prior to screening in treatment-experienced participants

Time frame: Through Week 56

Percentage of participants who were aflibercept injection-free

Time frame: Week 4 through Week 56

Percentage of participants who received 0 or 1 aflibercept injection

Time frame: Week 4 through Week 56

Mean change in area of Choroidal Neovascularization (CNV) lesion from Baseline over time through Week 56

CNV is the infiltration of abnormal blood vessels in the retina from the underlying choroid layer. It will be assessed by a CRC using SD-OCT.

Time frame: Baseline through Week 56

Mean change in macular volume from Baseline over time through Week 56

Macular volume will be measured as part of the full ophthalmic examination.

Time frame: Baseline through Week 56

Percentage of participants without Intraretinal Fluid (IRF) over time through Week 56

IRF will be assessed using SD-OCT

Time frame: Through Week 56

Percentage of participants without Subretinal Fluid (SRF) over time through Week 56

SRF will be assessed using SD-OCT

Time frame: Through Week 56

Percentage of participants without IRF and/or SRF over time through Week 56

IRF and SRF will be assessed using SD-OCT

Time frame: Through Week 56

Time to dry retina

Dry retina is defined as no IRF or SRF (i.e., absence of either). IRF and SRF will be assessed using SD-OCT

Time frame: Through Week 56

Time to sustained dry retina

Sustained dry retina is defined as no IRF or SRF (i.e., absence of either) maintained for 2 consecutive visits.

Time frame: Through Week 56

Number of participants who experienced ocular adverse events

The number of participants who experience an ocular adverse event will be summarized.

Time frame: Through Week 56

Number of participants who experienced mild, moderate or severe ocular adverse events

The number of participants who experience a mild, moderate or severe ocular adverse event will be summarized.

Time frame: Through Week 56

Number of participants who experienced non-ocular adverse events

The number of participants who experience a non-ocular adverse event will be summarized.

Time frame: Through Week 56

Number of participants who experienced mild, moderate or severe non-ocular adverse events

The number of participants who experience a mild, moderate or severe non-ocular adverse event will be summarized.

Time frame: Through Week 56

Mean change in 25-item National Eye Institute Visual Function Questionnaire (NEI VFQ-25) total and subscale scores

The NEI VFQ-25 measures vision-targeted patient-reported outcomes of individuals with chronic eye diseases. It comprises 25 questions. The assessment generates an overall composite score and includes the following subscales: global vision rating, difficulty with near vision activities, difficulty with distance vision activities, limitations in social functioning due to vision, role limitations due to vision, dependency on others due to vision, mental health symptoms due to vision, driving difficulties, limitations with peripheral and color vision, and ocular pain. A decrease in the NEI VFQ-25 score represents an improvement in disease severity.

Time frame: Day 1 to Week 28 and Week 56

Efficacy and Safety Study of Ixoberogene Soroparvovec (Ixo-vec) in Participants With Neovascular Age-Related Macular Degeneration

Overview

Conditions

Interventions

Eligibility

Locations (79)

Outcomes

Primary Outcomes

Secondary Outcomes

Central Contacts