Gaucher Disease
Gaucher disease is a rare inherited condition in which the body does not produce enough of an enzyme called glucocerebrosidase.
Overview
Gaucher disease is a rare inherited condition in which the body does not produce enough of an enzyme called glucocerebrosidase. This enzyme normally breaks down a fatty substance called glucocerebroside. When the enzyme does not work properly, this fatty material accumulates inside certain white blood cells. Over time, this build-up can affect spleen, liver, bone marrow and, in some forms, the brain. Gaucher disease is a type of lysosomal storage disorder. There are different types of Gaucher disease. Type 1 is the most common and does not usually affect the brain. Types 2 and 3 are associated with neurological involvement.
Causes and Genetics
Gaucher disease is caused by changes (mutations) in the GBA gene. The GBA gene provides instructions for making the enzyme glucocerebrosidase. When the enzyme is deficient or does not function properly, glucocerebroside accumulates within cells, particularly in the spleen, liver and bone marrow. Gaucher disease is inherited in an autosomal recessive pattern. This means a person must inherit two altered copies of the gene (one from each parent) to develop the condition. Parents who carry one altered copy are known as carriers and usually do not have symptoms.
Symptoms and Features
Symptoms vary depending on the type of Gaucher disease and the organs affected. Severity can range from mild to severe.
Characteristic Symptoms and Features
- Enlarged spleen (splenomegaly): often one of the earliest features and may lead to abdominal discomfort or fullness
- Enlarged liver (hepatomegaly) which may also be associated with abdominal discomfort
- Low blood counts: anaemia (low red blood cells) may cause fatigue and shortness of breath; thrombocytopenia (low platelets) may cause easy bruising or bleeding
- Bone involvement: bone pain, bone crises (episodes of severe pain), reduced bone density, fractures, and arthritis-like symptoms
Other Associated Symptoms and Features
- In Types 2 and 3 (neuronopathic forms), people may have symptoms that represent the impact on the central nervous system, including delay in developmental milestones in children, seizures, abnormal eye movements, problems with coordination and swallowing
- Children with Type 2 Gaucher disease often have severe central nervous system symptoms beginning in infancy. Type 3 disease is typically more slowly progressive
- Some individuals may also develop lung involvement
Symptoms may present in childhood or adulthood depending on the type and severity.
Treatment
Supportive care may include pain management, treatment of anaemia, physiotherapy, and monitoring of bone health. In rare cases, splenectomy (removal of the spleen) was previously performed but is now uncommon due to effective medical therapies. Patients are usually managed through specialist metabolic centres with regular monitoring of blood counts, organ size and bone health.
Research and Future Directions
Ongoing research is focused on improving treatments for neuronopathic forms of Gaucher disease, developing therapies that can cross the blood-brain barrier, and exploring gene therapy approaches. Studies are also assessing long-term outcomes, optimising treatment timing, and improving quality of life for individuals living with Gaucher disease. Advances in genetic testing and newborn screening may allow earlier diagnosis and treatment in the future.