Microperimetry Sensitivity Changes at the Functional Transition Zone and at the EZ Margins in X-Linked Retinitis Pigmentosa Treated With Gene Therapy.

What was studied

This was a later look at the Skyline trial of gene therapy. The people had X-linked retinitis pigmentosa. It used eyes, with 12 treated and 12 untreated. It used eye scans and light-sensitivity tests. It checked areas near the damaged retina over 12 months.

What they found

High-dose eyes had more spots gaining 7 dB or more than untreated eyes. This held for the whole grid but not for each region alone. High-dose eyes also had a higher average treatment effect in all retinal zones. Distance to the edge of intact photoreceptors did not predict which spots gained 7 dB.

What it means for patients

High-dose gene therapy was linked to better light-sensitivity results in the damaged and intact zones. The authors say it is hard to set goals for local gains of 7 dB. They say this in advance. They say picking retina areas likely to improve may help future trials.

Why it is not certain yet

The groups were small. This was an after-the-fact analysis of an earlier trial. Links to the edge of the intact zone were not found for 7 dB gains. The abstract does not give how long benefits last.

Source

Microperimetry Sensitivity Changes at the Functional Transition Zone and at the EZ Margins in X-Linked Retinitis Pigmentosa Treated With Gene Therapy.

We restate facts from the source record in our own words. The original wording belongs to its publisher.