title: The neuro-ophthalmology of mitochondrial disease.
abstract: Mitochondrial diseases frequently manifest neuro-ophthalmologic symptoms and signs. Because of the predilection of mitochondrial disorders to involve the optic nerves, extraocular muscles, retina, and even the retrochiasmal visual pathways, the ophthalmologist is often the first physician to be consulted. Disorders caused by mitochondrial dysfunction can result from abnormalities in either the mitochondrial DNA or in nuclear genes which encode mitochondrial proteins. Inheritance of these mutations will follow patterns specific to their somatic or mitochondrial genetics. Genotype-phenotype correlations are inconstant, and considerable overlap may occur among these syndromes. The diagnostic approach to the patient with suspected mitochondrial disease entails a detailed personal and family history, careful ophthalmic, neurologic, and systemic examination, directed investigations, and attention to potentially life-threatening sequelae. Although curative treatments for mitochondrial disorders are currently lacking, exciting research advances are being made, particularly in the area of gene therapy. Leber hereditary optic neuropathy, with its window of opportunity for timely intervention and its accessibility to directed therapy, offers a unique model to study future therapeutic interventions. Most patients and their relatives benefit from informed genetic counseling.
authors.affiliation: Department of Ophthalmology, Emory University School of Medicine, Atlanta, Georgia, USA.
authors.forename: J Alexander
authors.initials: JA
authors.lastname: Fraser
authors.forename: Valérie
authors.initials: V
authors.lastname: Biousse
authors.forename: Nancy J
authors.initials: NJ
authors.lastname: Newman
mesh_terms: D004272:DNA, Mitochondrial / Q000032:analysis; D005128:Eye Diseases / Q000175:diagnosis / Q000209:etiology* / Q000235:genetics; D005838:Genotype; D006801:Humans; D028361:Mitochondrial Diseases / Q000150:complications* / Q000175:diagnosis / Q000235:genetics; D009422:Nervous System Diseases / Q000175:diagnosis / Q000209:etiology* / Q000235:genetics; D010641:Phenotype
chemical_list: D004272:DNA, Mitochondrial
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