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Duarte galactosemia is an inherited condition associated with diminished ability to metabolize galactose due to a partial deficiency of the enzyme galactose-1-phosphate uridylyltransferase. [1] DG differs from classic galactosemia in that patients with Duarte galactosemia have partial GALT deficiency whereas patients with classic galactosemia ...
In classic galactosemia, galactose-1-phosphate uridylyltransferase activity is reduced or absent; leading to an accumulation of the precursors, galactose, galactitol, and Gal-1-P. [3] The elevation of precursors can be used to differentiate GALT deficiency from galactokinase deficiency, as Gal-1-P is typically not elevated in galactokinase ...
Adults with galactosemia are at higher risk for cataracts (See: Galactosemic Cataract), with a prevelance of 1 in 5. Adults with galactosemia are at a much greater risk for an anxiety disorder (prevelance of 1 in 2, or 50 percent) and a slightly elevated risk of depression (prevelance of 3 in 25, or 12 percent).
Deficiency of enzymes found in this pathway can result in galactosemia; therefore, diagnosis of this genetic disorder occasionally involves measuring the concentration of these enzymes. [3] One of such enzymes is galactose-1-phosphate uridylyltransferase (GALT). The enzyme catalyzes the transfer of a UDP-activator group from UDP-glucose to ...
Deficiency of GALT causes classic galactosemia. Galactosemia is an autosomal recessive inherited disorder detectable in newborns and childhood. [12] It occurs at approximately 1 in every 40,000-60,000 live-born infants.
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Unlike classic galactosemia, which is caused by a deficiency of galactose-1-phosphate uridyltransferase, galactokinase deficiency does not present with severe manifestations in early infancy. Its major clinical symptom is the development of cataracts during the first weeks or months of life, as a result of the accumulation, in the lens, of ...