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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Night blindness in Sorsby's fundus dystrophy reversed by vitamin A.

Sorsby's fundus dystrophy (SFD) is an autosomal dominant retinal degeneration caused by mutations in the tissue inhibitor of metalloproteinases-3 (TIMP3) gene. Mechanisms of the visual loss in SFD, however, remain unknown. In a SFD family with a novel TIMP3 point mutation, we tested a hypothesis that their night blindness is due to a chronic deprivation of vitamin A at the level of the photoreceptors caused by a thickened membrane barrier between the photoreceptor layer and its blood supply. Vitamin A at 50,000 IU/d was administered orally. Within a week, the night blindness disappeared in patients at early stages of disease. Nutritional night blindness is thus part of the pathophysiology of this genetic disease and vitamin A supplementation can lead to dramatic restoration of photoreceptor function.[1]


  1. Night blindness in Sorsby's fundus dystrophy reversed by vitamin A. Jacobson, S.G., Cideciyan, A.V., Regunath, G., Rodriguez, F.J., Vandenburgh, K., Sheffield, V.C., Stone, E.M. Nat. Genet. (1995) [Pubmed]
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