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Clin Genet ; 101(4): 448-453, 2022 04.
Article in English | MEDLINE | ID: mdl-34988992

ABSTRACT

Retinol dehydrogenase 11 (RDH11) is an 11-cis-retinol dehydrogenase that has a well-characterized, albeit auxiliary role in the retinoid cycle. Diseases caused by mutations in the RDH11 gene are very rare, and only one affected family with eye and intelligence involvement has been reported. In the present study, we describe the clinical and genetic findings in a Chinese patient with retinitis pigmentosa (RP), juvenile cataracts, intellectual disability, and myopathy. Trio-based whole-exome sequencing and whole genomic copy number variation detection were performed in this family, and compound heterozygous mutations were identified in RDH11 of the patient: c.938T>C (p.Leu313Pro) derived from the father and c.75-3C>A derived from the mother. Variant c.75-3C>A was confirmed to be a splice-site mutation by cDNA sequencing. It caused exon 2 skipping, resulting in a frameshift mutation and premature translation termination (p.Lys26Serfs*38). Moreover, we found mislocalization of RDH11 protein in muscle cells of the patient by using immunofluorescence staining. This is the first case reported in the Chinese population harboring mutations in RDH11 and revealing a new phenotype of syndromic RP with myopathy.


Subject(s)
Muscular Diseases , Oxidoreductases/genetics , Retinitis Pigmentosa , Alcohol Oxidoreductases , DNA Copy Number Variations , Eye Proteins/genetics , Humans , Muscular Diseases/genetics , Mutation , Pedigree , Phenotype , Retinitis Pigmentosa/diagnosis , Retinitis Pigmentosa/genetics
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