Abstract:
:Retinitis pigmentosa (RP), a genetically heterogeneous group of retinopathies that occur in both non-syndromic and syndromic forms, is caused by mutations in ∼100 genes. Although recent advances in next-generation sequencing have aided in the discovery of novel RP genes, a number of the underlying contributing genes and loci remain to be identified. We investigated three siblings, born to asymptomatic parents of Italian-American descent, who each presented with atypical RP with systemic features, including facial dysmorphologies, psychomotor developmental delays recognized since early childhood, learning disabilities and short stature. RP-associated ophthalmological findings included salt-and-pepper retinopathy, attenuation of the arterioles and generalized rod-cone dysfunction as determined by almost extinguished electroretinogram in 2 of 3 siblings. Atypical for RP features included mottled macula at an early age and peripapillary sparing of the retinal pigment epithelium. Whole-exome sequencing data, queried under a recessive model of inheritance, identified compound heterozygous stop mutations, c.C199T:p.R67* and c.C322T:p.R108*, in the retinol dehydrogenase 11 (RDH11) gene, resulting in a non-functional protein, in all affected children. In summary, deleterious mutations in RDH11, an important enzyme for vision-related and systemic retinoic acid metabolism, cause a new syndrome with RP.
journal_name
Hum Mol Genetjournal_title
Human molecular geneticsauthors
Xie YA,Lee W,Cai C,Gambin T,Nõupuu K,Sujirakul T,Ayuso C,Jhangiani S,Muzny D,Boerwinkle E,Gibbs R,Greenstein VC,Lupski JR,Tsang SH,Allikmets Rdoi
10.1093/hmg/ddu291subject
Has Abstractpub_date
2014-11-01 00:00:00pages
5774-80issue
21eissn
0964-6906issn
1460-2083pii
ddu291journal_volume
23pub_type
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