Complex metabolic disharmony in PMM2-CDG paves the way to new therapeutic approaches
PMM2-CDG is the most common defect among the congenital disorders of glycosylation. In order to investigate the effect of hypoglycosylation on important cellular pathways, we performed extensive biochemical studies on skin fibroblasts of PMM2-CDG patients. Among others, acylcarnitines, amino acids,...
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| Hauptverfasser: | , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
26 May 2023
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| In: |
Molecular genetics and metabolism
Year: 2023, Jahrgang: 139, Heft: 3, Pages: 1-10 |
| ISSN: | 1096-7206 |
| DOI: | 10.1016/j.ymgme.2023.107610 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.ymgme.2023.107610 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S1096719223002408 
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| Verfasserangaben: | Nastassja Himmelreich, Frauke Kikul, Lucie Zdrazilova, Tomáš Honzik, Andreas Hecker, Gernot Poschet, Christian Lüchtenborg, Britta Brügger, Sabine Strahl, Friederike Bürger, Jürgen G. Okun, Hana Hansikova, Christian Thiel |
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| 245 | 1 | 0 | |a Complex metabolic disharmony in PMM2-CDG paves the way to new therapeutic approaches |c Nastassja Himmelreich, Frauke Kikul, Lucie Zdrazilova, Tomáš Honzik, Andreas Hecker, Gernot Poschet, Christian Lüchtenborg, Britta Brügger, Sabine Strahl, Friederike Bürger, Jürgen G. Okun, Hana Hansikova, Christian Thiel |
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| 520 | |a PMM2-CDG is the most common defect among the congenital disorders of glycosylation. In order to investigate the effect of hypoglycosylation on important cellular pathways, we performed extensive biochemical studies on skin fibroblasts of PMM2-CDG patients. Among others, acylcarnitines, amino acids, lysosomal proteins, organic acids and lipids were measured, which all revealed significant abnormalities. There was an increased expression of acylcarnitines and amino acids associated with increased amounts of calnexin, calreticulin and protein-disulfid-isomerase in combination with intensified amounts of ubiquitinylated proteins. Lysosomal enzyme activities were widely decreased as well as citrate and pyruvate levels indicating mitochondrial dysfunction. Main lipid classes such as phosphatidylethanolamine, cholesterol or alkyl-phosphatidylcholine, as well as minor lipid species like hexosylceramide, lysophosphatidylcholines or phosphatidylglycerol, were abnormal. Biotinidase and catalase activities were severely reduced. In this study we discuss the impact of metabolite abnormalities on the phenotype of PMM2-CDG. In addition, based on our data we propose new and easy-to-implement therapeutic approaches for PMM2-CDG patients. | ||
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