Independent directory Public ClinicalTrials.gov records United States
Clear filters
ClinicalTrials.gov public records Last synced Sep 5, 2026, 7:56 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–3 of 3 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Conditions
Retinitis Pigmentosa, Usher Syndrome Type 2, Deaf Blind, Retinal Disease, Eye Diseases, Eye Diseases, Hereditary, Eye Disorders Congenital, Vision Disorders
Interventions
QR-421a, Sham-procedure
Drug · Other
Lead sponsor
Laboratoires Thea
Industry
Eligibility
12 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
2
States / cities
Dallas, Texas • Madison, Wisconsin
Conditions
Retinitis Pigmentosa, Usher Syndrome Type 2, Deaf Blind, Retinal Disease, Eye Diseases, Eye Diseases, Hereditary, Eye Disorders Congenital, Vision Disorders
Interventions
QR-421a, Sham-procedure (dose cohort 1&2 only)
Drug · Other
Lead sponsor
ProQR Therapeutics
Industry
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
4
States / cities
Boston, Massachusetts • Ann Arbor, Michigan • Portland, Oregon + 1 more
Conditions
Retinitis Pigmentosa, Usher Syndrome Type 2
Interventions
RNA antisense oligonucleotide for intravitreal injection
Drug
Lead sponsor
Laboratoires Thea
Industry
Eligibility
12 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
4
States / cities
Boston, Massachusetts • Ann Arbor, Michigan • Portland, Oregon + 1 more