Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/49375
Título: Methylmalonic acidaemia: Examination of genotype and biochemical data in 32 patients belonging to mut, cblA or cblB complementation group
Autores/as: Merinero, B.
Pérez, B.
Pérez-Cerdá, C.
Rincón, A.
Desviat, L. R.
Martínez, M. A.
Sala, Ruiz P.
García, M. J.
Aldamiz-Echevarría, L.
Campos, J.
Cornejo, V.
del Toro, M.
Mahfoud, A.
Martínez-Pardo, M.
Parini, R.
Pedrón, C.
Peña-Quintana, L. 
Pérez, M.
Pourfarzam, M.
Ugarte, M.
Clasificación UNESCO: 32 Ciencias médicas
320102 Genética clínica
241108 Metabolismo humano
Palabras clave: Methylmalonic acidaemia
Adenosylcobalamin
Cohort studies
Cell line
Fecha de publicación: 2008
Publicación seriada: Journal of Inherited Metabolic Disease 
Resumen: Methylmalonic acidaemia (MMA) is a genetic disorder caused by defects in methylmalonyl-CoA mutase or in any of the different proteins involved in the synthesis of adenosylcobalamin. The aim of this work was to examine the biochemical and clinical phenotype of 32 MMA patients according to their genotype, and to study the mutant mRNA stability by real-time PCR analysis. Using cellular and biochemical methods, we classified our patient cohort as having the MMA forms mut (n = 19), cblA (n = 9) and cblB (n = 4). All the mut (0) and some of the cblB patients had the most severe clinical and biochemical manifestations, displaying non-inducible propionate incorporation in the presence of hydroxocobalamin (OHCbl) in vitro and high plasma odd-numbered long-chain fatty acid (OLCFA) concentrations under dietary therapy. In contrast, mut (-) and cblA patients exhibited a milder phenotype with propionate incorporation enhanced by OHCbl and normal OLCFA levels under dietary therapy. No missense mutations identified in the MUT gene, including mut (0) and mut (-) changes, affected mRNA stability. A new sequence variation (c.562G>C) in the MMAA gene was identified. Most of the cblA patients carried premature termination codons (PTC) in both alleles. Interestingly, the transcripts containing the PTC mutations were insensitive to nonsense-mediated decay (NMD).
URI: http://hdl.handle.net/10553/49375
ISSN: 0141-8955
DOI: 10.1007/s10545-007-0667-y
Fuente: Journal of Inherited Metabolic Disease[ISSN 0141-8955],v. 31(1), p. 55-66 (Febrero 2008)
Colección:Artículos
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