Cone and rod dysfunction in the NARP syndrome

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منابع مشابه

Cone and rod dysfunction in the NARP syndrome.

AIMS Description of the ophthalmic manifestations of the NARP (neuropathy, ataxia, retinitis pigmentosa) syndrome that is associated with a point mutation in position 8993 of the mitochondrial DNA (mtDNA). METHODS A mother and her two children, all carrying the 8993 mtDNA mutation, were examined. Two had manifestations of the NARP syndrome. A complete ocular and systemic examination was perfo...

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Cone and rod function in cone degenerations

Progressive cone dystrophy (CD) is usually marked in the initial stages by reduced visual acuity, color vision deficiency and alterations in the photopic electroretinogram, while morphological alterations can be very mild; in some forms rods are affected in a later stage as well. We examined 40 patients with progressive cone dystrophy to determine the extent of functional losses in the cone sys...

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Mutations in the Cone-Rod Homeobox Gene Are Associated with the Cone-Rod Dystrophy Photoreceptor Degeneration

Crx is a novel paired-like homeodomain protein that is expressed predominantly in retinal photoreceptors and pinealocytes. Its gene has been mapped to chromosome 19q13.3, the site of a disease locus for autosomal dominant cone-rod dystrophy (CORDII). Analysis of the proband from a family with autosomal dominant CORD revealed an Arg41Trp substitution in the third residue of the CRX homeodomain. ...

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Paired-flash identification of rod and cone dysfunction in the diabetic rat.

PURPOSE To investigate the onset of retinal neural dysfunction in the streptozotocin (STZ)-induced diatebic rat. METHODS A cohort of 20 Sprague-Dawley rats were randomly assigned to treatment (STZ 50 mg/kg, n = 10) and control (citrate buffer, n = 10) groups and observed for 12 weeks. Diabetes was confirmed by blood glucose (>15 mmol/L) and HBA(1c) (>7.0%). Treated animals received 2 to 3 U i...

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NARP syndrome and adult-onset generalised seizures.

The neurogenic muscle weakness, ataxia and retinitis pigmentosa (NARP) syndrome is a maternally inherited disorder attributable to a heteroplasmic mtDNA point mutation. Catastrophic epilepsy may accompany severe, early onset forms of NARP, but seizures seem to be rare in cases with adolescent and adult onset. We describe a patient who developed clumsiness and visual problems in her teens. She h...

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ژورنال

عنوان ژورنال: British Journal of Ophthalmology

سال: 1999

ISSN: 0007-1161

DOI: 10.1136/bjo.83.2.190