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Recessive mutations in LEPREL1 underlie a recognizable lens subluxation phenotype.

Ophthalmic Genet.2015 Mar;36(1):58-63. doi:10.3109/13816810.2014.985847. Epub 2014 Dec 03
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摘要


PURPOSE:To uncover the homozygous recessive gene mutation underlying familial lens subluxation and/or juvenile lens opacities in four sisters from a consanguineous family. METHODS:Prospective family study (clinical phenotyping; homozygosity-analysis-guided candidate gene testing). RESULTS:The proband was a 14-year-old girl with long-standing poor vision, bilateral temporal lens subluxation, lens opacities, and axial high myopia. There were no syndromic findings, and fibrillin-1 sequencing was normal. Three sisters, also non-syndromic, had undergone bilateral juvenile lens surgery (two for juvenile cataract, 1 for lens subluxation) within the first two decades of life. Both sisters who had cataract surgery developed bilateral post-operative retinal detachments and one had documented lens instability during cataract surgery. Genetic analysis revealed the phenotype to segregate with a novel homozygous recessive mutation in LEPREL1 (c.292delC; p.Gly100Alafs*104). Recessive mutations in this gene were recently highlighted as a cause for axial myopia and early-onset cataract in two families for whom some affected members also had ectopia lentis and/or post-operative retinal detachments. CONCLUSIONS:Recessive LEPREL1 mutations should be recognized as part of the differential diagnosis of lens subluxation. The associated phenotype is non-syndromic and distinguishable from other causes of ectopia lentis in the context of its additional features: juvenile lens opacities, axial myopia, and a predisposition to retinal tears/detachment following intraocular surgery.

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