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flag FDA approves Complement Therapeutics' gene therapy trial for blindness-causing eye disease.

flag Complement Therapeutics has received FDA approval to launch the Opti-GAIN Phase I/II trial for CTx001, a gene therapy targeting geographic atrophy (GA) due to age-related macular degeneration, a leading cause of irreversible vision loss affecting about 1.5 million Americans. flag The therapy uses adeno-associated virus (AAV) to deliver a modified Complement Receptor 1 protein to regulate the immune system’s complement pathway, potentially slowing disease progression. flag The first-in-human trial, expected to begin dosing in early 2026, will evaluate safety, tolerability, and early effectiveness in 75 patients across international retinal centers, informed by data from the i-GAIN natural history study. flag The company, a spinout from the University of Manchester, views the milestone as a key step toward a potential one-time treatment for a condition with limited current options.

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