A Study to Evaluate the Safety and Tolerability of QR-1123 in Subjects With Autosomal Dominant Retinitis Pigmentosa Due to the P23H Mutation in the RHO Gene

2019-10-17 11:03:47 | BioPortfolio


This study evaluates the safety, tolerability and efficacy of QR-1123 injection in the eye (intravitreal; IVT) injections (one eye/unilateral) in subjects receiving a single dose or repeat doses. Single injections will be assessed in an open label way, and repeat injections will be assessed in a double-masked, randomized, sham-controlled fashion.


QR-1123 is an antisense oligonucleotide, designed to specifically target the mutant P23H messenger ribonucleic acid (mRNA) in order to reduce the expression of the P23H protein selectively, while preserving expression of the wild type (WT) rhodopsin (RHO) protein. It is hypothesized that the reduction of mutant P23H mRNA will reduce the deleterious effects of the dominant-negative protein and should result in increased function of WT rhodopsin protein in photoreceptors. Restoration of WT RHO function is expected to improve vision in patients with adRP due to the P23H mutation.

The study will comprise up to 8 single dose and repeat dose cohorts. Prior to initiating a higher single dose cohort and/or prior to initiating repeat dose cohort(s), available safety and efficacy data will be reviewed by the DMC.

In the single dose cohorts subjects will receive a single, unilateral IVT injection of QR-1123 in an open label fashion. In the repeat dose cohorts subjects will be randomized to receive either a unilateral IVT injection of QR-1123 every 3 months or a unilateral sham procedure every 3 months, in a double masked fashion. Subjects will be followed for safety, tolerability and efficacy for a total period of 12 months.

Study Design


Autosomal Dominant Retinitis Pigmentosa


QR-1123, Sham procedure


Retina Foundation of the Southwest
United States




ProQR Therapeutics

Results (where available)

View Results


Published on BioPortfolio: 2019-10-17T11:03:47-0400

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