Reference : Long-term outcome of Leigh syndrome caused by the NARP-T8993C mtDNA mutation.
Scientific journals : Article
Life sciences : Genetics & genetic processes
http://hdl.handle.net/2268/87739
Long-term outcome of Leigh syndrome caused by the NARP-T8993C mtDNA mutation.
English
DEBRAY, François-Guillaume mailto [Université de Liège - ULiège > Services généraux (Faculté de médecine vétérinaire) > Service administratif de la Faculté (Médecine vétérinaire)]
Lambert, Marie [> > > >]
Lortie, Anne [> > > >]
Vanasse, Michel [> > > >]
Mitchell, Grant A [> >]
2007
American Journal of Medical Genetics. Part A
Wiley Liss, Inc.
143A
17
2046-51
Yes (verified by ORBi)
International
1552-4825
1552-4833
Hoboken
NJ
[en] Adolescent ; Adult ; DNA, Mitochondrial/genetics ; Female ; Follow-Up Studies ; Humans ; Leigh Disease/diagnosis/genetics ; Male ; Neurodegenerative Diseases/diagnosis/genetics ; Point Mutation
[en] Mutations at mitochondrial DNA (mtDNA) nucleotide 8993 can cause neurogenic weakness, ataxia and retinitis pigmentosa (NARP syndrome), or maternally inherited Leigh syndrome (LS), with a correlation between the amount of mutant mtDNA and the severity of the neurological disease. The T8993C mutation is generally considered to be clinically milder than the T8993G mutation but when the level of heteroplasmy exceeds 90%, progressive neurodegeneration has been found. We report on a long-term follow-up of a patient who presented at 4 years of age with typical LS but showed an unexpected resolution of his symptoms and a favorable outcome. At 18 years of age, his neurological examination was near normal, with neither peripheral neuropathy nor retinopathy. mtDNA analysis identified the presence of T8993C mutation at high level (>95%) in the patient's blood leukocytes. This case report and literature review emphasizes the variability of the phenotypic expression of the T8993C mutation and the need for caution in predictive counseling in such patients. (c) 2007 Wiley-Liss, Inc.
http://hdl.handle.net/2268/87739
10.1002/ajmg.a.31880
Copyright 2007 Wiley-Liss, Inc.

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