Gene Therapy For Blindness Appears Initially Effective

Mito

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Gene Therapy for Blindness Appears Initially Effective, Says U.S. FDA

Spark Therapeutics Inc’s experimental gene therapy for a rare inherited form of blindness is effective, though it is unclear whether the benefit lasts over time, according to a preliminary review by the U.S. Food and Drug Administration.

The therapy, Luxturna, or voretigene neparvovec, would be the first-ever gene therapy for any inherited disease to be approved in the United States.

Inherited retinal diseases are a group of rare conditions caused by mutations in one or more than 220 different genes, including one known as RPE65, which tells cells how to produce a crucial enzyme needed for normal vision

https://gizmodo.com/an-fda-panel-just-greenlit-a-breakthrough-gene-therapy-1819412787

A panel of U.S. health advisers has endorsed an experimental approach to treating inherited blindness, setting the stage for the likely approval of an innovative new genetic medicine.

A panel of experts to the Food and Drug Administration voted unanimously in favor of Spark Therapeutics' injectable therapy, which aims to improve vision in patients with a rare mutation that gradually destroys normal vision. The vote amounts to a recommendation to approve the therapy.

If approved, it would be the first gene therapy in the U.S. for an inherited disease, offering hope to patients with a variety of related conditions.
 
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Mito

Mito

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Luxturna fixes a mutation in a gene known as RPE65, which is responsible for telling the body how to produce a protein that’s essential for normal eyesight. It introduces billions of engineered virus particles bearing a corrected version of the gene to the retinal cell, via a quick injection to the eyes.

However, Luxturna is not without its drawbacks. It’s not an outright cure, and it doesn’t give recipients full 20/20 vision. There’s currently no data on how long its effects last, so there’s a chance that patients’ sight might begin to recede once again over time.

Cost is also a major factor in how accessible it is. Two of the treatment’s biggest competitors, Strimvelis and Kymriah, cost around $700,000 and $475,000 respectively. Consequently it seems likely that Luxturna have to drop in price to be a feasible competitor. They might be losing ground, as Spark has announced plans to set up a program to help patients cover out-of-pocket costs like travel to Spark-proffering facilities.
 
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