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Hearing impairment and renal failure associated with RMND1 mutations

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Recently, two research groups reported that mutations in RMND1 were associated with encephalopathy, elevated lactate, hypotonia, and in some patients seizures or myoclonia in individuals from two consanguineous families. A combined respiratory chain deficiency and a defect in mitochondrial protein translation was found. In this study, we report two siblings who are compound heterozygous for the mutations, c.713A>G and c.1003delG, in RMND1. Respiratory chain enzymatic analysis and BN-PAGE showed a combined OXPHOS deficiency. Western blot analysis indicated normal levels of RMND1, but the assembly of the RMND1 homopolymeric complex was highly impaired. The two siblings had a markedly milder phenotype and longer survival compared to previously reported patients. In addition, they had renal failure and hearing impairment. These two newly described patients contribute to delineation of the clinical spectrum associated with RMND1 aberrations. © 2015 Wiley Periodicals, Inc.

Original languageEnglish
JournalAmerican Journal of Medical Genetics. Part A
Volume170
Issue number1
Pages (from-to)142-147
ISSN1552-4825
DOIs
Publication statusPublished - 2016

ID: 45844722