Galactose epimerase deficiency

Editor-In-Chief: Prab R Tumpati, MD
Obesity, Sleep & Internal medicine
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Galactose epimerase deficiency
UDP-glucose
Synonyms	GALE deficiency, Type III galactosemia
Pronounce	N/A
Specialty	N/A
Symptoms	Cataracts, hepatomegaly, intellectual disability, failure to thrive
Complications	N/A
Onset	Infancy
Duration	Chronic
Types	N/A
Causes	Genetic mutation in the GALE gene
Risks	Consanguinity, family history
Diagnosis	Newborn screening, genetic testing, enzyme assay
Differential diagnosis	Galactosemia, lactose intolerance, fructose intolerance
Prevention	Genetic counseling
Treatment	Dietary management, galactose restriction
Medication	None specific
Prognosis	Variable, depends on severity
Frequency	Rare
Deaths	Rare, with proper management

Autosomal recessive inheritance pattern

Complete galactose metabolism pathway

Galactose epimerase deficiency is a rare genetic metabolic disorder characterized by the body's inability to convert galactose to glucose. This condition is caused by mutations in the GALE gene and is inherited in an autosomal recessive manner.

Symptoms

The symptoms of galactose epimerase deficiency can vary greatly from person to person. Some individuals may have no symptoms, while others may experience severe complications. Common symptoms include failure to thrive, jaundice, liver disease, kidney failure, cataracts, and intellectual disability.

Causes

Galactose epimerase deficiency is caused by mutations in the GALE gene. This gene provides instructions for making an enzyme called galactose epimerase, which is involved in the process of converting galactose to glucose. Mutations in the GALE gene disrupt this process, leading to the accumulation of galactose in the body.

Diagnosis

The diagnosis of galactose epimerase deficiency is typically made through a combination of clinical examination, biochemical testing, and genetic testing. Biochemical testing can detect elevated levels of galactose in the blood, while genetic testing can identify mutations in the GALE gene.

Treatment

There is currently no cure for galactose epimerase deficiency. Treatment is focused on managing the symptoms and preventing complications. This may involve a galactose-free diet, medications to manage symptoms, and regular monitoring of organ function.

Prognosis

The prognosis for individuals with galactose epimerase deficiency varies depending on the severity of the condition. Some individuals may live a normal life with few symptoms, while others may experience severe complications and have a reduced life expectancy.

See also

• Galactosemia
• Inborn errors of metabolism
• Genetic disorders

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