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EnglishThe acronym "MELAS" (mitochondrial encephalomyopathy with lactic acidosis and stroke-like episodes) denotes patients with histological, biochemical and/or molecular evidence of mitochondrial disease who experience stroke-like episodes. Here we report on a girl with repeated stroke-like episodes and status epilepticus, who was diagnosed with MELAS due to a novel mitochondrial cytochrome b gene (MTCYB) mutation (m.15092G>A, which predicts p.G116S). Western blotting and in silico analyses suggested that this mutation could affect the stability of complex III. Cytochrome b is the only mtDNA-encoded subunit of respiratory chain complex III. Mutations in MTCYB have been associated with isolated mitochondrial myopathy and exercise intolerance, and rarely with multisystem and/or central nervous system involvement. If the m.3243A>G and other common MELAS mutations are absent in several tissues, MTCYB should be sequenced from muscle in patients with stroke-like episodes, especially if muscle histology does not support a mitochondrial myopathy and lactic acidosis is absent.
| Autori interni: | |
| Autori: | Mancuso, M; Nesti, C; Ienco, Ec; Orsucci, D; Pizzanelli, C; Chiti, A; Giorgi, Fs; Meschini, Mc; Santorelli, Fm; Logerfo, A; Romano, A; Siciliano, G; Bonuccelli, Ubaldo |
| Titolo: | Novel MTCYB mutation in a young patient with recurrent stroke-like episodes and status epilepticus. |
| Anno del prodotto: | 2014 |
| Digital Object Identifier (DOI): | 10.1002/ajmg.a.36725 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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http://hdl.handle.net/11568/564070
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