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Recurrent episodes of myoglobinuria, mental retardation and seizures but no hemolysis in two brothers with phosphoglycerate kinase deficiency

S. Coppens, P. Koralkova, A. Aeby, R. Mojzikova, N. Deconinck, H. Kadhim, R. van Wijk,

. 2016 ; 26 (3) : 207-210. [pub] 20151130

Language English Country England, Great Britain

Document type Case Reports, Journal Article, Research Support, Non-U.S. Gov't

Persistent link   https://www.medvik.cz/link/bmc17000454

Grant support
NT13587 MZ0 CEP Register

We report two brothers with mild intellectual deficiency, exercise intolerance, rhabdomyolysis, seizures and no hemolysis. Phosphoglycerate kinase (PGK) activity was strongly decreased in their red blood cells. Subsequent molecular analysis of PGK1 revealed hemizygosity for a novel mutation c.756 + 3A > G, in intron 7. Analysis of the effect of this mutation on pre-mRNA processing demonstrated markedly decreased levels of normal PGK1 mRNA. In addition, the c.756 + 3A > G change resulted in abnormally spliced transcripts. If translated, these transcripts mostly encode for C-terminally truncated proteins. The consequences of the c.756 + 3A > G mutation is discussed, as well as the genotype-to-phenotype correlation with regard to previously described mutations (PGK Fukuroi and PGK Antwerp), which also result in C-terminal truncated proteins.

References provided by Crossref.org

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$a Coppens, Sandra $u Neuromuscular Reference Centre, Department of Pediatric Neurology, Hôpital Erasme, Université Libre de Bruxelles (U.L.B.), Brussels, Belgium; Neuromuscular Reference Centre, Department of Pediatric Neurology, Queen Fabiola Children's University Hospital, Université Libre de Bruxelles (U.L.B.), Brussels, Belgium. Electronic address: sacoppen@ulb.ac.be.
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$a Recurrent episodes of myoglobinuria, mental retardation and seizures but no hemolysis in two brothers with phosphoglycerate kinase deficiency / $c S. Coppens, P. Koralkova, A. Aeby, R. Mojzikova, N. Deconinck, H. Kadhim, R. van Wijk,
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$a We report two brothers with mild intellectual deficiency, exercise intolerance, rhabdomyolysis, seizures and no hemolysis. Phosphoglycerate kinase (PGK) activity was strongly decreased in their red blood cells. Subsequent molecular analysis of PGK1 revealed hemizygosity for a novel mutation c.756 + 3A > G, in intron 7. Analysis of the effect of this mutation on pre-mRNA processing demonstrated markedly decreased levels of normal PGK1 mRNA. In addition, the c.756 + 3A > G change resulted in abnormally spliced transcripts. If translated, these transcripts mostly encode for C-terminally truncated proteins. The consequences of the c.756 + 3A > G mutation is discussed, as well as the genotype-to-phenotype correlation with regard to previously described mutations (PGK Fukuroi and PGK Antwerp), which also result in C-terminal truncated proteins.
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$a Kořalková, Pavla $u Department of Clinical Chemistry and Haematology, University Medical Center Utrecht, Utrecht, The Netherlands; Department of Biology, Faculty of Medicine and Dentistry, Palacký University Olomouc, Olomouc, Czech Republic. $7 xx0229679
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