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

CRB1 gene mutations are associated with keratoconus in patients with leber congenital amaurosis.

PURPOSE: To present an association of mutations in the CRB1 gene with keratoconus in patients with Leber congenital amaurosis (LCA). METHODS: Sixteen patients with genotyped LCA (having the CRB1, CRX, RetGC, RPE65, and AIPL1 mutations) were recruited from one ophthalmology practice and examined for the presence of keratoconus. Corneal topography, visual acuity, and slit lamp biomicroscopic examination were performed in all cases. RESULTS: The mean age of the patients was 34.5 years (range, 13-74). Visual acuities ranged from 20/40 to light perception. Corneal topography was successfully collected in 15 of the cases. Five of the 16 cases had slit lamp and/or topographic features consistent with keratoconus. One patient had a clinical picture that was keratoglobus-like. Of these six cases, four had a CRB1 mutation and two had a CRX mutation. Of the three subjects with the CRX mutation, one had keratoconus, one had the keratoglobus-like presentation, and one was normal. Our cohort represents 14 separate, unrelated families. Only one family comprised multiple members with LCA. These were three affected brothers, one with keratoconus, all with CRB1 mutations. CONCLUSIONS: Although the results cannot exclude other gene mutations, they suggest that LCA patients with a CRB1 mutation may have a particular susceptibility to keratoconus.[1]

References

  1. CRB1 gene mutations are associated with keratoconus in patients with leber congenital amaurosis. McMahon, T.T., Kim, L.S., Fishman, G.A., Stone, E.M., Zhao, X.C., Yee, R.W., Malicki, J. Invest. Ophthalmol. Vis. Sci. (2009) [Pubmed]
 
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