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Essential fructosuria is a genetic condition that is inherited in an autosomal recessive manner. [3] Mutations in the KHK gene, located on chromosome 2p23.3-23.2 are responsible. The incidence of essential fructosuria has been estimated at 1:130,000. [4] The actual incidence is likely higher, because those affected are asymptomatic. [citation ...
Deficiencies of fructokinase cause essential fructosuria, a clinically benign condition characterized by the excretion of unmetabolized fructose in the urine. Fructose-1-phosphate is metabolized by aldolase B into dihydroxyacetone phosphate and glyceraldehyde .
The lack of two important enzymes in fructose metabolism results in the development of two inborn errors in carbohydrate metabolism – essential fructosuria and hereditary fructose intolerance. In addition, reduced phosphorylation potential within hepatocytes can occur with intravenous infusion of fructose.
Inactivation of the hepatic fructokinase results in asymptomatic fructosuria. [citation needed] Hereditary fructose intolerance (HFI) results in poor feeding, failure to thrive, chronic liver disease and chronic kidney disease, and death. HFI is caused by a deficiency of fructose 1,6-biphosphate aldolase in the liver, kidney cortex and small ...
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Fructosuria or hepatic fructokinase deficiency is a rare but benign inherited metabolic disorder. [8] This condition is caused by a deficiency of fructokinase in the liver. Affected individuals usually display a large blood fructose concentration after the ingestion of fructose, sucrose or sorbitol. [ 9 ]
In patients with essential fructosuria, metabolism of fructose by hexokinase to fructose-6-phosphate is the primary method of metabolizing dietary fructose; this pathway is not significant in normal individuals.
A deficiency is associated with essential fructosuria. References External links. Hepatic+fructokinase at the U.S. National ...