Novel mouse models of methylmalonic aciduria recapitulate phenotypic traits with a genetic dosage effect
Methylmalonic aciduria (MMAuria), caused by deficiency of methylmalonyl-CoA mutase (MUT), usually presents in the newborn period with failure to thrive and metabolic crisis leading to coma or even death. Survivors remain at risk of metabolic decompensations and severe long term complications, notabl...
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| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
12 August 2016
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| In: |
The journal of biological chemistry
Year: 2016, Jahrgang: 291, Heft: 39, Pages: 20563-20573 |
| ISSN: | 1083-351X |
| DOI: | 10.1074/jbc.M116.747717 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1074/jbc.M116.747717 Verlag, kostenfrei, Volltext: http://www.jbc.org/content/291/39/20563 
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| Verfasserangaben: | Patrick Forny, Anke Schumann, Merima Mustedanagic, Déborah Mathis, Marie-Angela Wulf, Nadine Nägele, Claus-Dieter Langhans, Assem Zhakupova, Joerg Heeren, Ludger Scheja, Ralph Fingerhut, Heidi L. Peters, Thorsten Hornemann, Beat Thony, Stefan Kölker, Patricie Burda, D. Sean Froese, Olivier Devuyst, and Matthias R. Baumgartner |
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| 245 | 1 | 0 | |a Novel mouse models of methylmalonic aciduria recapitulate phenotypic traits with a genetic dosage effect |c Patrick Forny, Anke Schumann, Merima Mustedanagic, Déborah Mathis, Marie-Angela Wulf, Nadine Nägele, Claus-Dieter Langhans, Assem Zhakupova, Joerg Heeren, Ludger Scheja, Ralph Fingerhut, Heidi L. Peters, Thorsten Hornemann, Beat Thony, Stefan Kölker, Patricie Burda, D. Sean Froese, Olivier Devuyst, and Matthias R. Baumgartner |
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| 520 | |a Methylmalonic aciduria (MMAuria), caused by deficiency of methylmalonyl-CoA mutase (MUT), usually presents in the newborn period with failure to thrive and metabolic crisis leading to coma or even death. Survivors remain at risk of metabolic decompensations and severe long term complications, notably renal failure and neurological impairment. We generated clinically relevant mouse models of MMAuria using a constitutive Mut knock-in (KI) allele based on the p.Met700Lys patient mutation, used homozygously (KI/KI) or combined with a knockout allele (KO/KI), to study biochemical and clinical MMAuria disease aspects. Transgenic Mutki/ki and Mutko/ki mice survive post-weaning, show failure to thrive, and show increased methylmalonic acid, propionylcarnitine, odd chain fatty acids, and sphingoid bases, a new potential biomarker of MMAuria. Consistent with genetic dosage, Mutko/ki mice have lower Mut activity, are smaller, and show higher metabolite levels than Mutki/ki mice. Further, Mutko/ki mice exhibit manifestations of kidney and brain damage, including increased plasma urea, impaired diuresis, elevated biomarkers, and changes in brain weight. On a high protein diet, mutant mice display disease exacerbation, including elevated blood ammonia, and catastrophic weight loss, which, in Mutki/ki mice, is rescued by hydroxocobalamin treatment. This study expands knowledge of MMAuria, introduces the discovery of new biomarkers, and constitutes the first in vivo proof of principle of cobalamin treatment in mut-type MMAuria. | ||
| 650 | 4 | |a amino acid | |
| 650 | 4 | |a ammonia | |
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| 650 | 4 | |a inborn error of metabolism | |
| 650 | 4 | |a knock-in mouse model | |
| 650 | 4 | |a metabolic disease | |
| 650 | 4 | |a methylmalonic aciduria | |
| 650 | 4 | |a mitochondrial disease | |
| 650 | 4 | |a vitamin B12 metabolism | |
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