| Clinical and molecular findings in Thai patients with isolated methylmalonic acidemia. | |
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MedLine Citation:
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PMID: 22695176 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Isolated methylmalonic acidemia (MMA) is a genetically heterogeneous organic acid disorder caused by either deficiency of the enzyme methylmalonyl-CoA mutase (MCM), or a defect in the biosynthesis of its cofactor, adenosyl-cobalamin (AdoCbl). Herein, we report and review the genotypes and phenotypes of 14 Thai patients with isolated MMA. Between 1997 and 2011, we identified 6 mut patients, 2 cblA patients, and 6 cblB patients. The mut and cblB patients had relatively severe phenotypes compared to relatively mild phenotypes of the cblA patients. The MUT and MMAB genotypes were also correlated to the severity of the phenotypes. Three mutations in the MUT gene: c.788G>T (p.G263V), c.809_812dupGGGC (p.D272Gfs*2), and c.1426C>T (p.Q476*); one mutation in the MMAA gene: c.292A>G (p.R98G); and three mutations in the MMAB gene: c.682delG (p.A228Pfs*2), c.435delC (p.F145Lfs*69), and c.585-1G>A, have not been previously reported. RT-PCR analysis of a common intron 6 polymorphism (c.520-159C>T) of the MMAB gene revealed that it correlates to deep intronic exonization leading to premature termination of the open reading frame. This could decrease the ATP:cobalamin adenosyltransferase (ATR) activity resulting in abnormal phenotypes if found in a compound heterozygous state with a null mutation. We confirm the genotype-phenotype correlation of isolated MMA in the study population, and identified a new molecular basis of the cblB disorder. |
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Authors:
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Nithiwat Vatanavicharn; Voraratt Champattanachai; Somporn Liammongkolkul; Phannee Sawangareetrakul; Siriporn Keeratichamroen; James R Ketudat Cairns; Chantragan Srisomsap; Achara Sathienkijkanchai; Vorasuk Shotelersuk; Mahattana Kamolsilp; Duangrurdee Wattanasirichaigoon; Jisnuson Svasti; Pornswan Wasant |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-5-29 |
Journal Detail:
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Title: Molecular genetics and metabolism Volume: - ISSN: 1096-7206 ISO Abbreviation: - Publication Date: 2012 May |
Date Detail:
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Created Date: 2012-6-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9805456 Medline TA: Mol Genet Metab Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012 Elsevier Inc. All rights reserved. |
Affiliation:
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Division of Medical Genetics, Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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