Angelman Syndrome (or AS) is a neurodevelopmental disorder affecting approximately 1 in 15,000 live births.

Although the cause of AS is known, there are currently no treatments available for this disorder. Angelman Syndrome is a severe neurological disorder characterised by profound developmental delays, problems with motor coordination (ataxia) and balance, and epilepsy.

Individuals with AS do not develop functional speech.

The seizure disorder in individuals with AS can be difficult to treat. Feeding disorders in infancy are common and some persist throughout childhood. Sleeping difficulties are commonly noted in individuals with AS.

Angelman Syndrome affects all races and both genders equally.

Individuals with AS tend to have a happy demeanour, characterised by frequent laughing, smiling and excitability. Many individuals with AS are attracted to water and take great pleasure in activities like swimming and bathing. 

People living with AS require life-long care, intensive therapies to help develop functional skills and improve their quality of life, and close medical supervision often involving multiple medical interventions. Angelman Syndrome may be misdiagnosed since other syndromes have similar characteristics. 

Angelman Syndrome is a genetic-based disorder resulting from the loss of function of the Ube3a gene in the brain. Loss of the UBE3A enzyme produced by this gene prevents neurons from functioning correctly, leading to deficits in learning and memory. Importantly, loss of UBE3A does not appear to affect neuronal development, indicating that neurons could function normally if UBE3A function is restored. 





The Cause

Angelman Syndrome is caused by a severe reduction of expression of the gene UBE3A in the brain. Learn about the cause...>


Find out what types of testing are available for different causes of Angelman Syndrome.>


 A newly diagnosed parent may question "What will my child be like?" Learn about variability in Angelman Syndrome.>

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