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- W3162180630 endingPage "808" @default.
- W3162180630 startingPage "792" @default.
- W3162180630 abstract "Over the last few years, various inborn disorders have been reported in the malate aspartate shuttle (MAS). The MAS consists of four metabolic enzymes and two transporters, one of them having two isoforms that are expressed in different tissues. Together they form a biochemical pathway that shuttles electrons from the cytosol into mitochondria, as the inner mitochondrial membrane is impermeable to the electron carrier NADH. By shuttling NADH across the mitochondrial membrane in the form of a reduced metabolite (malate), the MAS plays an important role in mitochondrial respiration. In addition, the MAS maintains the cytosolic NAD+ /NADH redox balance, by using redox reactions for the transfer of electrons. This explains why the MAS is also important in sustaining cytosolic redox-dependent metabolic pathways, such as glycolysis and serine biosynthesis. The current review provides insights into the clinical and biochemical characteristics of MAS deficiencies. To date, five out of seven potential MAS deficiencies have been reported. Most of them present with a clinical phenotype of infantile epileptic encephalopathy. Although not specific, biochemical characteristics include high lactate, high glycerol 3-phosphate, a disturbed redox balance, TCA abnormalities, high ammonia, and low serine, which may be helpful in reaching a diagnosis in patients with an infantile epileptic encephalopathy. Current implications for treatment include a ketogenic diet, as well as serine and vitamin B6 supplementation." @default.
- W3162180630 created "2021-05-24" @default.
- W3162180630 creator A5014139372 @default.
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- W3162180630 creator A5045237232 @default.
- W3162180630 creator A5061187532 @default.
- W3162180630 creator A5076498092 @default.
- W3162180630 date "2021-05-24" @default.
- W3162180630 modified "2023-10-14" @default.
- W3162180630 title "Inborn disorders of the malate aspartate shuttle" @default.
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