New syndrome with retinitis pigmentosa is caused by nonsense mutations in retinol dehydrogenase RDH11.
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Xie YA, Lee W, Cai C, Gambin T, Noupuu K, Sujirakul T, Ayuso C, Jhangiani S, Muzny D, Boerwinkle E, Gibbs R, Greenstein VC, Lupski JR, Tsang SH, Allikmets R
New syndrome with retinitis pigmentosa is caused by nonsense mutations in retinol dehydrogenase RDH11.
Hum Mol Genet. 2014 Nov 1;23(21):5774-80. doi: 10.1093/hmg/ddu291. Epub 2014 Jun 10.
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- 24916380 [ View in PubMed]
- Abstract
Retinitis pigmentosa (RP), a genetically heterogeneous group of retinopathies that occur in both non-syndromic and syndromic forms, is caused by mutations in approximately 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.