FOCUS: A Phase I/II First in Human Study to Evaluate the Safety and Efficacy of GT005 Administered in Subjects With Dry AMD

This is an open label first in human Phase I/II multicentre study of GT005 in subjects with Macular Atrophy due to AMD

This study will evaluate the safety, the dose response and efficacy (anatomical and functional visual outcomes) of three doses of GT005 administered as a single subretinal injection in genetically defined subjects with Macular Atrophy due to Age-related Macular Degeneration (AMD). Following consent, subjects will undergo a number of ophthalmic and clinical assessments to determine eligibility for inclusion in the study. Once eligibility is confirmed, subjects will be enrolled, receive treatment, and will be followed for 48 weeks, with the option to be followed for a further 4 years in long-term follow up after completing week 48.

This study is terminating early due to the interim analysis demonstrating lack of treatment efficacy. No additional subjects will be randomized or dosed. The trial is not ending early because of medical problems.

Eligibility Criteria:
Inclusion Criteria:

1. Able and willing to give consent to study participation
2. Have a clinical diagnosis of GA secondary to AMD in the study eye, as determined by the Investigator, and a diagnosis of AMD in the contralateral eye (except if the subject is monocular)
3. Cohorts 1 to 6: GA lesion(s) total size in the study eye must be ≥1.25mm2 and ≤17.5mm2.

   Cohort 7: GA lesion(s) total size in the study eye must be ≥1.25mm2
4. GA lesion(s) in the study eye must reside completely within the FAF fundus image
5. Cohorts 1 to 3: BCVA of ≤50 letters (6/36 Snellen acuity equivalent or worse) using ETDRS charts in the study eye Cohorts 4 to 7: BCVA of ≥24 letters (6/95 and 20/320 Snellen acuity equivalent or better) using ETDRS charts in the study eye
6. Aged ≥55 years
7. Able to attend all study visits and complete the study procedures
8. Women of child-bearing potential need to have a negative urine pregnancy test within two weeks prior to receiving the drug. A pregnancy test is not required for postmenopausal women (defined as being at least 12 consecutive months without menses) or those surgically sterilised (those having a bilateral tubal ligation/bilateral salpingectomy, bilateral tubal occlusive procedure, hysterectomy, or bilateral oophorectomy)

Exclusion Criteria:

1. Have evidence or history of Choroidal Neovascularisation (CNV) in the study eye. Subjects are permitted to have CNV in the fellow eye defined as either:

   1. Non-exudative/sub-clinical fellow eye CNV identified at screening, or
   2. Known history of fellow eye CNV with either ≥2 years since diagnosis or with no active treatment required in 6 months prior to screening
2. Presence of moderate/severe non-proliferative diabetic retinopathy or worse in the study eye
3. Have history of vitrectomy, sub-macular surgery, or macular photocoagulation in the study eye
4. History of intraocular surgery in the study eye within 12 weeks prior to Screening (Visit 1). Yttrium aluminum garnet capsulotomy is permitted if performed \>10 weeks prior to Visit 1
5. Have clinically significant cataract that may require surgery during the study period in the study eye
6. Presence of moderate to severe glaucomatous optic neuropathy in the study eye; uncontrolled IOP despite the use of more than two topical agents; a history of glaucoma-filtering or valve surgery is also excluded
7. Axial myopia of greater than -8 diopters in the study eye
8. Have received any investigational product for the treatment of GA within the past 6 months or 5 half-lives (whichever is longer), other than nutritional supplements such as the Age-Related Eye Disease Study (AREDS) formula
9. Have received a gene or cell therapy at any time
10. Have a contraindication to the specified protocol corticosteroid regimen
11. Are unwilling to use two forms of contraception (one of which being a barrier method) for 90 days post-dosing, if relevant
12. Active malignancy within the past 12 months, except for: Appropriately treated carcinoma in situ of the cervix, non-melanoma skin carcinoma, or prostate cancer with a stable prostate-specific antigen (PSA) ≥12 months
13. Have any other significant ocular or non-ocular medical or psychiatric condition which, in the opinion of the Investigator, may either put the subject at risk or may influence the results of the study
14. Cohorts 5 to 7 only: presence of metallic objects or implanted stimulator devices in or near the head, including cochlear implants, deep brain stimulators, vagus nerve stimulators, and other implanted electrodes or stimulators