1. Clinical, Biochemical, and Molecular Characterization of Two Families with Novel Mutations in the LDHA Gene (GSD XI).
- Author
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Serrano-Lorenzo P, Rabasa M, Esteban J, Hidalgo Mayoral I, Domínguez-González C, Blanco-Echevarría A, Garrido-Moraga R, Lucia A, Blázquez A, Rubio JC, Palma-Milla C, Arenas J, and Martín MA
- Subjects
- Humans, Female, Lactate Dehydrogenase 5, Isoenzymes genetics, Isoenzymes metabolism, Codon, Nonsense, Lactic Acid metabolism, Pyruvic Acid, Mutation, Glycogen Storage Disease, Dermatitis
- Abstract
Lactate dehydrogenase (LDH) catalyzes the reversible conversion of L-lactate to pyruvate. LDH-A deficiency is an autosomal recessive disorder (glycogenosis type XI, OMIM#612933) caused by mutations in the LDHA gene. We present two young adult female patients presenting with intolerance to anaerobic exercise, episodes of rhabdomyolysis, and, in one of the patients, psoriasis-like dermatitis. We identified in the LDHA gene a homozygous c.410C>A substitution that predicts a p.Ser137Ter nonsense mutation in Patient One and a compound heterozygous c.410C>A (p.Ser137Ter) and c.750G>A (p.Trp250Ter) nonsense mutation in Patient Two. The pathogenicity of the variants was demonstrated by electrophoretic separation of LDH isoenzymes. Moreover, a flat lactate curve on the forearm exercise test, along with the clinical combination of myopathy and psoriatic-like dermatitis, can also lead to the diagnosis.
- Published
- 2022
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