The reported cases showed clinical, biochemical, histopathological, and molecular features lending support to the hypothesis of a pathogenic effect of the detected mutations. Case 1 was a neonatal presentation who showed multiple mitochondrial respiratory chain enzyme defects in muscle associated with a new homoplasmic m.5514A > G transition in the tRNATrp gene. Case 2 was a late infantile presentation who also showed mitochondrial respiratory chain enzyme deficiencies in muscle together with a new m.1643A > G tRNA Val mutation in homoplasmy. Case 3 showed a MERRF phenotype presented in childhood associated with the once previously reported m.15923A > G mutation in heteroplasmy in all the tissues studied. © 2012 Springer-Verlag.
CITATION STYLE
Del Mar O’Callaghan, M., Emperador, S., López-Gallardo, E., Jou, C., Buján, N., Montero, R., … Montoya, J. (2012). New mitochondrial DNA mutations in tRNA associated with three severe encephalopamyopathic phenotypes: Neonatal, infantile, and childhood onset. Neurogenetics, 13(3), 245–250. https://doi.org/10.1007/s10048-012-0322-0
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