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A six-year-old girl named Saffie Sandford from Stevenage has undergone groundbreaking gene therapy to treat her rare inherited eye condition, Leber’s Congenital Amaurosis (LCA). This disorder hinders the eye’s cells from producing a vital protein necessary for normal vision. Saffie’s mother described the treatment as “like someone waved a magic wand and restored her sight in the dark,” highlighting the remarkable improvement seen after the therapy.
Saffie’s diagnosis came after she struggled to see in dim light, despite wearing glasses from the age of two due to short-sightedness. When she was five, tests at Moorfields Eye Hospital confirmed she had LCA, a condition leading to severely reduced vision in daylight and complete blindness in low light as the patient ages. Her family was informed that without intervention, Saffie would likely be blind by 30. The subsequent treatment involved Luxturna, a gene therapy administered at Great Ormond Street Hospital (GOSH), where a healthy copy of the defective gene was injected directly into each eye in separate procedures conducted months apart.
The therapy represents the first of its kind targeting a genetic cause of LCA, with Saffie receiving her first treatment in April 2025 and the second in September of the same year. According to GOSH and University College London researchers, this one-off gene therapy improves visual function and strengthens the visual pathways during a critical period of brain development, though it is not considered a cure. Their study monitored 15 children treated between 2020 and 2023 and found that younger children experienced more significant improvements compared to older children, emphasizing the importance of early intervention.
Rob Henderson, a consultant ophthalmologist at GOSH, remarked that the research objectively demonstrates gene therapy’s ability to enhance visual pathways in young children with this rare condition. He noted that even modest progress in vision can profoundly impact the lives of both patients and their families. The findings underscore the therapeutic potential of gene therapy for inherited retinal diseases and stress the need for age-appropriate assessment techniques to fully capture treatment benefits
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