Dravet Syndrome Treatment in Singapore

What is Dravet Syndrome?

Dravet Syndrome is a developmental and epileptic encephalopathy that typically begins during the first year of life in an otherwise normally developing infant. Seizures are often prolonged, may be triggered by fever or changes in body temperature, and can become difficult to control. As the condition progresses, other seizure types, developmental delays, movement and coordination difficulties, behavioural concerns, and learning problems may develop.

What is the Importance of Timely Treatment?

Timely diagnosis and treatment help control seizures, reduce prolonged seizure episodes and seizure-related injuries, monitor developmental changes, and provide appropriate supportive therapies. Early specialist management is particularly important because some commonly used antiseizure medicines can worsen seizures in people with Dravet Syndrome.

What are the Common Symptoms of Dravet Syndrome?

• Prolonged Seizures: Seizures may last several minutes or longer and can require urgent medical management.
• Fever-Triggered Seizures: Seizures may be triggered by fever, illness, overheating, or sudden temperature changes.
• Multiple Seizure Types: Children may develop myoclonic, absence, focal, or other seizure types as the condition progresses.
• Developmental Difficulties: Development may slow, or developmental delays may become noticeable during early childhood.
• Movement and Coordination Problems: Some individuals develop balance, walking, coordination, or motor difficulties.
• Behavioural and Learning Difficulties: Attention, communication, learning, and behavioural challenges may occur as the condition progresses.

Causes and Risk Factors of Dravet Syndrome

Causes

• SCN1A Gene Variant: Most cases involve a pathogenic variant in the SCN1A gene, which plays an important role in neuronal sodium-channel function.
• Altered Neuronal Function: Changes in sodium-channel activity can disrupt the balance of electrical activity in the brain and increase seizure susceptibility.
• De Novo Genetic Changes: In most affected individuals, the SCN1A variant occurs spontaneously and is not inherited from either parent.
• Other Genetic Causes: A small proportion of patients may have Dravet-like epilepsy associated with other genetic abnormalities.
• Unknown Cause: In some clinically suspected cases, clinicians may not initially identify a specific genetic cause.

Risk Factors

• Early-Onset Seizures: Seizures beginning during infancy, particularly prolonged or hemiclonic seizures, are an important clinical feature.
• Fever-Associated Seizures: Seizures frequently associated with fever or temperature changes may raise suspicion.
• Family History: A family history is uncommon because most cases result from new genetic changes, although inherited SCN1A variants can occasionally occur.
• Seizure Characteristics: Prolonged, recurrent, or multiple seizure types during infancy may be associated with the condition.

Latest Research and Technologies in the Treatment of Dravet Syndrome in Singapore

• Recent advances in Dravet Syndrome care include genetic testing, prolonged video-EEG monitoring, advanced brain imaging, precision seizure management, and newer antiseizure therapies. Research is also exploring gene-targeted treatments, antisense oligonucleotides, gene therapy approaches, and other therapies designed to address the underlying SCN1A-related neuronal dysfunction.