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Sporadic optic atrophy due to synonymous codon change altering mRNA splicing of OPA1

Sporadic optic atrophy due to synonymous codon change altering mRNA splicing of OPA1 To the Editor: Autosomal dominant optic atrophy (ADOA, OMIM 165500) is the most frequent form of hereditary optic atrophy first described by Kjer ( 1 ). This disease is, generally, characterized by the progressive decrease of visual acuity first appearing in childhood, loss of sensitivity in the central visual field (central, paracentral or coecocentral scotomas), optic nerve pallor and dyschromatopsia often predominating in the blue-yellow hues (tritanopia). Mutations in the OPA1 gene, located on chromosome 3q28–q29 and which codes for a mitochondrial dynamin-related GTPase, are found in about 60% of patients affected with ADOA ( 2–4 ). We report, in this study, a sporadic case of progressive optic atrophy caused by a de novo heterozygous c.1770G > C variant in exon 18 of the OPA1 gene. This mutation was absent in 400 chromosome controls, but it did not modify the corresponding amino acid (R590R) of the protein. The pathogenicity of this new mutation was demonstrated at the mRNA level. Cloning and sequencing of the transcriptional product showed a frameshift caused by the entire exon 18 skipping. <h1>Patients and methods</h1> The patient, a 19-year-old French man, was affected with progressive bilateral optic atrophy, initially diagnosed at age 6. There http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Clinical Genetics Wiley

Sporadic optic atrophy due to synonymous codon change altering mRNA splicing of OPA1

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References (8)

Publisher
Wiley
Copyright
Blackwell Munksgaard, 2004
ISSN
0009-9163
eISSN
1399-0004
DOI
10.1111/j.1399-0004.2004.00358.x
pmid
15617556
Publisher site
See Article on Publisher Site

Abstract

To the Editor: Autosomal dominant optic atrophy (ADOA, OMIM 165500) is the most frequent form of hereditary optic atrophy first described by Kjer ( 1 ). This disease is, generally, characterized by the progressive decrease of visual acuity first appearing in childhood, loss of sensitivity in the central visual field (central, paracentral or coecocentral scotomas), optic nerve pallor and dyschromatopsia often predominating in the blue-yellow hues (tritanopia). Mutations in the OPA1 gene, located on chromosome 3q28–q29 and which codes for a mitochondrial dynamin-related GTPase, are found in about 60% of patients affected with ADOA ( 2–4 ). We report, in this study, a sporadic case of progressive optic atrophy caused by a de novo heterozygous c.1770G > C variant in exon 18 of the OPA1 gene. This mutation was absent in 400 chromosome controls, but it did not modify the corresponding amino acid (R590R) of the protein. The pathogenicity of this new mutation was demonstrated at the mRNA level. Cloning and sequencing of the transcriptional product showed a frameshift caused by the entire exon 18 skipping. <h1>Patients and methods</h1> The patient, a 19-year-old French man, was affected with progressive bilateral optic atrophy, initially diagnosed at age 6. There

Journal

Clinical GeneticsWiley

Published: Jan 1, 2005

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