Image

A Clinical Trial Evaluating the Safety and Efficacy of a Single Subretinal Injection of AGTC-501 in Participants With XLRP

Recruiting
12 - 50 years of age
Male
Phase 2/3

Powered by AI

Overview

This study will evaluate and compare the safety, efficacy, and tolerability of 2 doses of a recombinant adeno-associated virus vector (AGTC-501) to an untreated control group in male participants with X-linked retinitis pigmentosa caused by RPGR mutations.

Description

This study is a randomized, controlled, masked, multi-center study evaluating and comparing 2 doses of AGTC-501 to an untreated control group. A single subretinal injection of AGTC-501 Dose 1 or Dose 2 will be administered in participants in 2 treatment groups while participants in the untreated control group will be followed and evaluated, after which they will be evaluated to determine eligibility to receive treatment with AGTC-501 Dose 2.

Approximately 75 eligible male participants between 12 and 50 years of age (inclusive) will be randomized in a 1:1:1 ratio to 1 of 3 groups.

Eligibility

General Inclusion Criteria:

  1. Provide written informed consent or assent (per local regulation), prior to the conduct of any study-related procedure. Participants who provide assent must have a parent, guardian, or legal representative provide written informed consent.
  2. Be between 12 and 50 years of age (inclusive) at the time of informed consent and assent (as applicable).
  3. Be male (XY chromosome) and have at least one documented pathogenic or likely pathogenic variant in the RPGR gene.
  4. Have a clinical diagnosis of XLRP.
  5. Be able and willing, as assessed by the Investigator, to follow study instructions, complete study assessments, comply with the protocol, and attend study visits for the duration of the study.

    Ocular Inclusion Criteria (Study Eye):

  6. Have a BCVA ≤ 78 letters (approximately Snellen, 20/32) and ≥ 34 letters (approximately Snellen, 20/200)
  7. Have a LLVA ≤64 letters (approximately Snellen 20/50) in the study eye
  8. Be able to perform all tests of visual and retinal function and structure in both eyes based on the participant's reliability, and fixation, in the study eye per the Investigator's discretion.
  9. Have detectable baseline mean macular sensitivity .
  10. Have a detectable sub-foveal ellipsoid zone (EZ) line as assessed by SD-OCT in the study eye and confirmed by the CRC.
  11. If study eye will be at the discretion of the Investigator and/or Surgeon.

General Exclusion Criteria:

  1. Have other known disease-causing mutations documented in the participant's medical history or identified through a retinal dystrophy gene panel, that in the opinion of the Investigator would interfere with the potential therapeutic effect of the study agent or the quality of the assessments.
  2. For participants with herpes simplex virus (HSV):
    1. Have history of oral or genital herpes and unable and/or unwilling to utilize prophylactic antiviral medication.
    2. Have a history of ocular herpes.
    3. Have active oral or genital herpes or are currently receiving treatment for HSV infection.
  3. Have known sensitivity or allergy to systemic corticosteroids or other

    immunosuppressive medications.

  4. Have used anti-coagulant agents that may alter coagulation (e.g., warfarin, heparin, apixaban, or high dose docosahexaenoic acid [DHA; fish oil]) within 7 days prior to study treatment administration (ibuprofen, aspirin, or similar are acceptable).
  5. Have used systemic corticosteroids or other immunosuppressive medications within 3 months prior to screening and/or intend to use during screening. Corticosteroids used on an as-needed basis administered by insufflation, inhalation or local administration to the skin and mucosa such as Symbicort (budesonide/formoterol), Flonase (fluticasone propionate), and skin creams and ointments containing corticosteroids shall not be exclusionary.
  6. If sexually active or planning to become sexually active, are unwilling to use barrier contraception for 3 months following treatment administration.
  7. Are currently participating or recently participated in any other research
  8. Have previously received any AAV gene therapy product, stem cell therapy, cell-based therapy, or similar biologics.
  9. Have significant media opacity impacting evaluation of the retina or vitreous. administration.
  10. Had intraocular surgery within 90 days of study treatment administration.
  11. Have any active ocular/intraocular infection or inflammation (e.g., severe blepharitis, infectious conjunctivitis, keratitis, scleritis, endophthalmitis, idiopathic or autoimmune associated uveitis, or herpetic lesions).
  12. Have a history of corticosteroid-induced raised IOP of >25 mmHg following corticosteroid exposure, despite topical IOP-lowering pharmacologic therapy.
  13. Have any artificial retinal implant or prosthesis.
  14. Have absence of clear ocular media and/or inadequate pupil dilation to facilitate good quality SD-OCT images.
  15. Have any history of rhegmatogenous retinal detachment.
  16. Have myopia (spherical equivalent) exceeding -10 diopters (or axial length of >30 mm if the Principal Investigator [PI] deems it appropriate to measure) or presence of pathologic myopia in the study eye.
  17. Have passed the Low Contrast Ora-VNC mobility course at ≤0.35 lux light level in either eye or binocularly at any screening visit.

Study details

X-Linked Retinitis Pigmentosa

NCT04850118

Beacon Therapeutics

30 April 2024

Step 1 Get in touch with the nearest study center
What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
  • Sign up as volunteer  to help accelerate the development of new treatments and to get notified about similar trials.

You are contacting

Investigator Avatar

Primary Contact

site

FAQs

Learn more about clinical trials

What is a clinical trial?

A clinical trial is a study designed to test specific interventions or treatments' effectiveness and safety, paving the way for new, innovative healthcare solutions.

Why should I take part in a clinical trial?

Participating in a clinical trial provides early access to potentially effective treatments and directly contributes to the healthcare advancements that benefit us all.

How long does a clinical trial take place?

The duration of clinical trials varies. Some trials last weeks, some years, depending on the phase and intention of the trial.

Do I get compensated for taking part in clinical trials?

Compensation varies per trial. Some offer payment or reimbursement for time and travel, while others may not.

How safe are clinical trials?

Clinical trials follow strict ethical guidelines and protocols to safeguard participants' health. They are closely monitored and safety reviewed regularly.
Add a private note
  • abc Select a piece of text.
  • Add notes visible only to you.
  • Send it to people through a passcode protected link.