D-2-hydroxyglutaric aciduria: case report and biochemical studies

Area of Science:

• Biochemistry
• Genetics
• Metabolic Disorders

Background:

• Protein-losing gastroenteropathy (PLG) is a rare condition characterized by excessive protein loss in the gastrointestinal tract.
• Egg allergy is a common food hypersensitivity with diverse clinical manifestations.
• Inherited metabolic disorders can present with complex and overlapping symptoms.

Observation:

• A patient with PLG and egg allergy exhibited an unrecognized organic aciduria.
• Analysis identified D-2-hydroxyglutaric aciduria as a novel metabolic abnormality in this patient.

Findings:

• The observed D-2-hydroxyglutaric aciduria is linked to an inherited metabolic disorder.
• The disorder likely involves a deficiency in D-2-hydroxyglutarate dehydrogenase activity.
• This deficiency impairs the catabolism of 5-aminolaevulinate.

Implications:

• This finding expands the spectrum of known inherited metabolic disorders.
• It highlights a potential link between metabolic dysfunction and gastrointestinal protein loss.
• Further research is warranted to elucidate the precise mechanism and genetic basis.