Pentosuria
Encyclopedia
Pentosuria is a condition where xylulose
(a pentose
) presents in the urine
in unusually high concentrations.
It is associated with a deficiency of L-xylulose reductase
.
L-xylulose is a reducing sugar so it may give false diagnosis of diabetes as it is found in high concentrations in urine
It was characterized as an inborn error of metabolism in 1908.
Xylulose
Xylulose is a ketopentose, a monosaccharide containing five carbon atoms, and including a ketone functional group. It has the chemical formula 5105. In nature, it occurs in both the L- and D-enantiomers.- Pathology :...
(a pentose
Pentose
A pentose is a monosaccharide with five carbon atoms. Pentoses are organized into two groups. Aldopentoses have an aldehyde functional group at position 1...
) presents in the urine
Urine
Urine is a typically sterile liquid by-product of the body that is secreted by the kidneys through a process called urination and excreted through the urethra. Cellular metabolism generates numerous by-products, many rich in nitrogen, that require elimination from the bloodstream...
in unusually high concentrations.
It is associated with a deficiency of L-xylulose reductase
L-xylulose reductase
L-xylulose reductase is an enzyme responsible for the metabolism of xylulose, converting it into xylitol....
.
L-xylulose is a reducing sugar so it may give false diagnosis of diabetes as it is found in high concentrations in urine
It was characterized as an inborn error of metabolism in 1908.