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Mutations in the USH1C gene associated with sector retinitis pigmentosa and hearing loss.

Authors: Saihan, Z  Stabej Ple, Q  Robson, AG  Rangesh, N  Holder, GE  Moore, AT  Steel, KP  Luxon, LM  Bitner-Glindzicz, M  Webster, AR 
Citation: Saihan Z, etal., Retina. 2011 Sep;31(8):1708-16. doi: 10.1097/IAE.0b013e31820d3fd1.
Pubmed: (View Article at PubMed) PMID:21487335
DOI: Full-text: DOI:10.1097/IAE.0b013e31820d3fd1

PURPOSE: To determine the molecular cause of sector retinitis pigmentosa and hearing loss in two affected siblings. METHODS: Direct DNA sequencing of the USH1C gene was performed in two affected siblings. Putative pathogenic sequence changes were assayed in their parent's chromosomes and in control chromosomes. Clinical examination included visual acuity measurement, visual field measurement, electrophysiologic assessment, and fine matrix mapping. Retinal imaging with fundus photography, scanning laser ophthalmoscope (fundus autofluorescence), and optical coherence tomography was performed. Hearing and vestibular function was also assessed. RESULTS: The siblings were aged 42 years and 40 years, and both were compound heterozygotes for the p.R103H missense change and the novel splice site change c.2227-1G>A in the USH1C gene. Both alleles were found to be in trans. Neither allele was identified in a panel of 866 control chromosomes, and both were considered pathogenic. Both siblings had sector retinitis pigmentosa restricted to the inferior and nasal retina. Fundus autofluorescence imaging showed a clear demarcation between normal and abnormal areas of retina, which corresponded to areas of reduced sensitivity on fine matrix mapping and loss of visual field. Both siblings had severe hearing loss but were able to develop language. CONCLUSION: We report a novel molecular cause of sector retinitis pigmentosa associated with hearing loss representing a new phenotype associated with mutations in the USH1C gene.


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CRRD Object Information
CRRD ID: 8695918
Created: 2014-08-06
Species: All species
Last Modified: 2014-08-06
Status: ACTIVE


RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.