Ricotti, Valeria and Jaegle, Herbert and Theodorou, Maria and Moore, Anthony T. and Muntoni, Francesco and Thompson, Dorothy A. (2016) Ocular and neurodevelopmental features of Duchenne muscular dystrophy: a signature of dystrophin function in the central nervous system. EUROPEAN JOURNAL OF HUMAN GENETICS, 24 (4). pp. 562-568. ISSN 1018-4813, 1476-5438
Full text not available from this repository. (Request a copy)Abstract
Multiple isoforms of dystrophin (Dp427, Dp260, Dp140, Dp71) are expressed differentially in the central nervous system (CNS) including the retinal layers. Disruption of these protein products is responsible for cognitive dysfunction, electroretinogram (ERG) abnormalities and behavioural disorders in Duchenne muscular dystrophy (DMD). We studied the ocular characteristics and neuropsychiatric profile of 16 DMD boys. The ISCEV standard, full-field flash ERGs were assessed. Intellectual ability and behavioural disturbances were measured. All genotypes were associated with mildly abnormal photopic ERG a: b-wave amplitude ratios. In addition, we identified the following genotype/phenotype correlations: boys with mutations upstream of exon 30 (ie, isolated Dp427 altered expression) showed normal scotopic a: b ratios, abnormal photopic oscillatory potential OP2 and normal scotopic OP2. Conversely, all boys with DMD mutations downstream of exon 30 showed profoundly 'negative' scotopic ERGs (a: b ratios 41). In these patients, the involvement of Dp260 isoform resulted in the absence of slow rod pathway signalling in15 Hz scotopic flicker ERGs. These boys had abnormal scotopic OP2 and normal photopic OP2. Finally, children with mutations also affecting Dp71 were associated with more pronounced electronegative ERGs. When correlating ERGs to neurodevelopmental outcome, we found a positive correlation between negative scotopic ERGs and neurodevelopmental disturbances, and the most severe findings were in boys with Dp71 disruption. These findings suggest a strong association between DMD mutations affecting different DMD isoforms with characteristically abnormal scotopic ERGs and severe neurodevelopmental problems. The role of the ERG as a potential biomarker for dystrophin function in the CNS and response to novel genetic therapies warrants further exploration.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MOUSE RETINA; ELECTRORETINOGRAPHY; DP71; MUTATIONS; PHENOTYPE; BRAIN; GENE; RELIABILITY; EXPRESSION; DISORDERS; |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Augenheilkunde |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 03 Apr 2019 08:49 |
| Last Modified: | 03 Apr 2019 08:49 |
| URI: | https://pred.uni-regensburg.de/id/eprint/3149 |
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