Adult Polyglucosan Body Disease (APBD) is a rare genetic disorder that affects the nervous system. It is caused by mutations in the GBE1 gene, which is inherited in an autosomal recessive manner. This means that both parents must carry a copy of the mutated gene for their child to be at risk of developing APBD. Genetic counseling and testing can help determine the risk of inheriting the disease.
Adult Polyglucosan Body Disease (APBD) is a rare genetic disorder that affects the nervous system. It is caused by mutations in the GBE1 gene, which provides instructions for producing an enzyme called glycogen branching enzyme. This enzyme is responsible for breaking down a complex sugar called glycogen into smaller, more manageable units. In individuals with APBD, the mutations in the GBE1 gene lead to a deficiency or dysfunction of the glycogen branching enzyme.
The inheritance pattern of APBD is autosomal recessive, which means that an individual must inherit two copies of the mutated GBE1 gene (one from each parent) in order to develop the disease. If both parents are carriers of the mutated gene, there is a 25% chance with each pregnancy that their child will have APBD.
It is important to note that being a carrier of the mutated GBE1 gene does not typically cause any symptoms or health problems. Carriers are usually unaffected and may not even be aware that they carry the gene mutation. However, if two carriers have a child together, there is a chance that the child may inherit two copies of the mutated gene and develop APBD.
Genetic counseling and testing can be helpful for individuals who have a family history of APBD or are concerned about being carriers. These services can provide information about the risk of passing on the mutated gene and help individuals make informed decisions about family planning.