Subtenon Autologous Platelet-Rich Plasma in Inherited and Degenerative Retinal Diseases (NCT07341919) | Clinical Trial Compass
Active — Not RecruitingPhase 1/2
Subtenon Autologous Platelet-Rich Plasma in Inherited and Degenerative Retinal Diseases
Brazil30 participantsStarted 2025-01-04
Plain-language summary
his prospective, comparative pilot study investigates the safety and functional outcomes of subtenon autologous platelet-rich plasma (PRP) in patients with Retinitis Pigmentosa (RP) and Extensive Macular Atrophy with Pseudodrusen-like Appearance (EMAP).
Participants will receive three subtenon injections of autologous platelet-rich plasma (1.5 mL per injection) administered at two-month intervals (M0, M2, M4).
The primary objective is to assess functional changes over a 6-month period, with a focus on visual field preservation, evaluated by the Field Preservation Deviation Index (FPDI) and Mean Deviation (MD), as well as best-corrected visual acuity (BCVA, LogMAR).
Secondary outcomes include changes in 30-Hz flicker electroretinography (ERG) amplitude, structural retinal parameters on optical coherence tomography (OCT)-including central macular thickness and ellipsoid zone length-and ocular safety outcomes, such as intraocular pressure, local tolerability, and the occurrence of inflammatory or adverse events related to subtenon PRP administration.
Who can participate
Age range
18 Years – 80 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria
* Age ≥ 18 years.
* Clinical diagnosis of retinitis pigmentosa (RP) or EMAP (Extensive Macular Atrophy with Pseudodrusen-like Appearance), confirmed by multimodal evaluation.
* Best-corrected visual acuity (BCVA) ≥ counting fingers at 1 meter (approximately ≤ 1.9 logMAR) in the study eye.
* Measurable visual field on iCare COMPASS (10-2 or 24-2) with acceptable reliability indices.
* Clear ocular media adequate for safe intravitreal injection and high-quality optical coherence tomography (OCT) imaging.
* Ability and willingness to provide written informed consent.
* Ability to comply with scheduled study visits, including:
* Baseline (M0)
* Day 7-14 after injections
* Month 2 (M2), Day 7-14
* Month 4 (M4), Day 7-14
* Month 6 (M6)
* For ERG subset only:
o Presence of a recordable baseline 30-Hz flicker electroretinogram (ERG) response, defined as a signal-to-noise ratio ≥ 3:1 and amplitude ≥ 3.0 μV.
* Note: Absence of a measurable flicker ERG response does not exclude participation in the main study.
Exclusion Criteria
* Active ocular inflammation (anterior, intermediate, or posterior uveitis) or active infectious ocular disease in the study eye.
* Active choroidal neovascularization or other macular diseases unrelated to RP or EMAP.
* Uncontrolled glaucoma (intraocular pressure \> 21 mmHg despite therapy) or optic neuropathies not related to RP or EMAP.
* Significant media opacity that may impair imaging quality or compromise the safety of …
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Change in Field Preservation Deviation Index (FPDI)