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BMC Neurol. 2011 Jul 12;11:85. doi: 10.1186/1471-2377-11-85.

Clinical and molecular features of an infant patient affected by Leigh Disease associated to m.14459G>A mitochondrial DNA mutation: a case report.

Author information

1
Centro Dino Ferrari, Department of Neurological Sciences, University of Milan, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, via Francesco Sforza 35, 20122 Milan, Italy.

Abstract

BACKGROUND:

Leigh Syndrome (LS) is a severe neurodegenerative disorder characterized by bilateral symmetrical necrotic lesions in the basal ganglia and brainstem. Onset is in early infancy and prognosis is poor. Causative mutations have been disclosed in mitochondrial DNA and nuclear genes affecting respiratory chain subunits and assembly factors.

CASE PRESENTATION:

Here we report the clinical and molecular features of a 15-month-old female LS patient. Direct sequencing of her muscle-derived mtDNA revealed the presence of two apparently homoplasmic variants: the novel m.14792C>G and the already known m.14459G>A resulting in p.His16Asp change in cytochrome b (MT-CYB) and p.Ala72Val substitution in ND6 subunit, respectively. The m.14459G>A was heteroplasmic in the mother's blood-derived DNA.

CONCLUSIONS:

The m.14459G>A might lead to LS, complicated LS or Leber Optic Hereditary Neuropathy. A comprehensive re-evaluation of previously described 14459G>A-mutated patients does not explain this large clinical heterogeneity.

PMID:
21749722
PMCID:
PMC3148968
DOI:
10.1186/1471-2377-11-85
[Indexed for MEDLINE]
Free PMC Article

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