التفاصيل البيبلوغرافية
| العنوان: |
Unique presentation of LHON/MELAS overlap syndrome caused by m.13046T>C in MTND5. |
| المؤلفون: |
Kolarova, Hana, Liskova, Petra, Tesarova, Marketa, Kucerova Vidrova, Vendula, Forgac, Martin, Zamecnik, Josef, Hansikova, Hana, Honzik, Tomas |
| المصدر: |
Ophthalmic Genetics; Dec2016, Vol. 37 Issue 4, p419-423, 5p |
| مصطلحات موضوعية: |
MITOCHONDRIAL DNA, PATHOGENIC microorganisms, CEREBROSPINAL fluid, GENOMES, THYROIDITIS diagnosis |
| مستخلص: |
Background: Leber hereditary optic neuropathy (LHON) and mitochondrial encephalopathy, myopathy, lactic acidosis and stroke-like episodes (MELAS) syndromes are mitochondrially inherited disorders characterized by acute visual failure and variable multiorgan system presentation, respectively. Materials and methods: A 12-year-old girl with otherwise unremarkable medical history presented with abrupt, painless loss of vision. Over the next few months, she developed moderate sensorineural hearing loss, vertigo, migraines, anhedonia and thyroiditis. Ocular examination confirmed bilateral optic nerve atrophy. Metabolic workup documented elevated cerebrospinal fluid lactate. Initial genetic analyses excluded the three most common LHON mutations. Subsequently, Sanger sequencing of the entire mitochondrial DNA (mtDNA) genome was performed. Results: Whole mtDNA sequencing revealed a pathogenic heteroplasmic mutation m.13046T>C inMTND5encoding the ND5 subunit of complex I. This particular variant has previously been described in a single case report of MELAS/Leigh syndrome (subacute necrotizing encephalopathy). Based on the constellation of clinical symptoms in our patient, we diagnose the condition as LHON/MELAS overlap syndrome. Conclusions: We describe a unique presentation of LHON/MELAS overlap syndrome resulting from a m.13046T>C mutation in a 12-year-old girl. In patients with sudden vision loss in which three of the most prevalent LHON mitochondrial mutations have been ruled out, molecular genetic examination should be extended to other mtDNA-encoded subunits ofMTND5complex I. Furthermore, atypical clinical presentations must be considered, even in well-described phenotypes. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
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