| Title | Five novel SUCLG1 mutations in three Chinese patients with succinate-CoA ligase deficiency noticed by mild methylmalonic aciduria |
| Authors | Liu, Yupeng Li, Xiyuan Wang, Qiao Ding, Yuan Song, Jinqing Yang, Yanling |
| Affiliation | Peking Univ, Hosp 1, Beijing 100034, Peoples R China. Peking Univ, Hosp 1, Dept Pediat, 1 Xi An Men St, Beijing 100034, Peoples R China. |
| Keywords | Methylmalonic aciduria Succinate-CoA ligase deficiency Encephalomyopathy Mitochondrial DNA depletion SUCLG1 MITOCHONDRIAL-DNA DEPLETION DIGITAL PCR DISORDERS ACIDEMIA |
| Issue Date | 2016 |
| Publisher | BRAIN & DEVELOPMENT |
| Citation | BRAIN & DEVELOPMENT.2016,38,(1),61-67. |
| Abstract | Objective: Methylmalonic aciduria is the most common organic aciduria in mainland China. Succinate-CoA ligase deficiency causes encephalomyopathy with mitochondrial DNA depletion and mild methylmalonic aciduria. Patients usually present with severe encephalomyopathy, infantile lactic acidosis, which can be fatal, and mild methylmalonic aciduria. Patients and methods: Three Chinese patients (two boys and one girl) were hospitalized because of severe encephalomyopathy between 7 and 9 months. They presented with severe psychomotor retardation, hypotonia, dystonia, athetoid movements, seizures, feeding problems and failure to thrive. Mild elevated urine methylmalonic acid and blood propionylcamitine indicated methylmalonic aciduria. Gene capture and high-throughput genomic sequencing was carried out. Results: Five novel mutations in SUCLG1 were identified in these patients: c.550G>A (p.G184S) in exon 5, c.751C>T (p.G251S) in exon 7, c.809A>C (p.L270W) in exon 7, c.961C>G (p.A321P) in exon 8 and c.826-2A>G (Splicing) in exon 9 Significant depletion of mtDNA was not observed in the peripheral leukocytes of the three patients in spite of mild decreasing of mitochondrial respiratory chain complex I in two patients and complex V in one patient. After treatment with cobalamin, calcium folinate, L-carnitine, vitamin B1, C, and coenzyme Q10, and nutrition intervention, the patients improved. Conclusions: Succinate-CoA ligase deficiency due to SUCLG1 mutations is a rare cause of methylmalonic aciduria. Biochemical and gene studies are keys for the differential diagnoses. Three Chinese patients with mild methylmalonic aciduria were genetically diagnosed using high-throughput genomic sequencing. Five novel pathogenic mutations in SUCLG1 were identified. (c) 2015 The Japanese Society of Child Neurology. Published by Elsevier B.V. All rights reserved. |
| URI | http://hdl.handle.net/20.500.11897/419516 |
| ISSN | 0387-7604 |
| DOI | 10.1016/j.braindev.2015.05.002 |
| Indexed | SCI(E) PubMed |
| Appears in Collections: | 第一医院 |
