Canadian Medical Guide > Diseases > Congenital, Hereditary, and Neonatal Diseases and Abnormalities > Genetic Diseases, Inborn > Metabolism, Inborn Errors > Carbohydrate Metabolism, Inborn Errors > Fructose Metabolism, Inborn Errors Terms and Definitions




Fructose Metabolism, Inborn Errors

Medical Definition: Inherited abnormalities of fructose metabolism, which include three known autosomal recessive types: hepatic fructokinase deficiency (essential fructosuria), hereditary fructose intolerance, and hereditary fructose-1,6-diphosphatase deficiency. Essential fructosuria is a benign asymptomatic metabolic disorder caused by deficiency in fructokinase, leading to decreased conversion of fructose to fructose-1-phosphate and alimentary hyperfructosemia, but with no clinical dysfunction; may produce a false-positive diabetes test.
Guide Notes: an inborn error of carbohydrate metab; do not use /congen & do not coord with INFANT, NEWBORN, DISEASES; DF: FRUCTOSE METAB INBORN ERR
Previously Indexed: Carbohydrate Metabolism, Inborn Errors (1966-1988),Fructose (1966-1988)
Fructose Metabolism, Inborn Errors Categories.
Canadian Medical Guide Definition Fructose Intolerance - An autosomal recessive fructose metabolism disorder due to deficient fructose-1-phosphate aldolase (EC 2.1.2.13) activity, resulting in accumulation of fructose-1-phosphate. The accumulated fructose-1-phosphate inhibits glycogenolysis and gluconeogenesis, causing severe hypoglycemia following ingestion of fructose. Prolonged fructose ingestion in infants leads ultimately to hepatic failure and death. Patients develop a strong distaste for sweet food, and avoid a chronic course of the disease by remaining on a fructose- and sucrose-free diet.
Canadian Medical Guide Definition Fructose-1,6-Diphosphatase Deficiency - An autosomal recessive fructose metabolism disorder due to absent or deficient fructose-1,6-diphosphatase activity. Gluconeogenesis is impaired, resulting in accumulation of gluconeogenic precursors (e.g., amino acids, lactate, ketones) and manifested as hypoglycemia, ketosis, and lactic acidosis. Episodes in the newborn infant are often lethal. Later episodes are often brought on by fasting and febrile infections. As patients age through early childhood, tolerance to fasting improves and development becomes normal.

Fructose Metabolism, Inborn Errors Medical Definitions and Terms

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