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- W3206906957 abstract "Mitochondrial malate dehydrogenase (MDH2) deficiency (MDH2D) is an ultra-rare disease with only three patients described in literature to date. MDH2D leads to an interruption of the tricarboxylic acid (TCA) cycle and malate-aspartate shuttle (MAS) and results in severe early onset encephalopathy. Affected infants suffer from psychomotor delay, muscular hypotonia and frequent seizures. Laboratory findings are unspecific, including elevated lactate in blood and cerebrospinal fluid. Brain magnetic resonance imaging reveals delayed myelination and brain atrophy. Currently there is no curative therapy to treat this devastating disease. Here, we present a female patient diagnosed with MDH2D after a stroke-like episode at 18 months. Trio-whole exome sequencing revealed compound heterozygous missense variants in the MDH2 gene: c.398C>T, p.(Pro133Leu) and c.445delinsACA, p.(Pro149Hisfs*22). MDH2 activity assay and oxygraphic analysis in patient's fibroblasts confirmed the variants were pathogenic. At the age of 36 months, a drug trial with triheptanoin was initiated and well tolerated. The patient's neurologic and biochemical phenotype improved and she had no further metabolic decompensations during the treatment period suggesting a beneficial effect of triheptanoin on MDH2D. Further preclinical and clinical studies are required to evaluate triheptanoin treatment for MDH2D and other TCA cycle and MAS defects." @default.
- W3206906957 created "2021-10-25" @default.
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- W3206906957 date "2021-12-01" @default.
- W3206906957 modified "2023-09-27" @default.
- W3206906957 title "Triheptanoin – Novel therapeutic approach for the ultra-rare disease mitochondrial malate dehydrogenase deficiency" @default.
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- W3206906957 doi "https://doi.org/10.1016/j.ymgmr.2021.100814" @default.
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