Ketogenic dietary therapy for Doose syndrome

Written by:
Elizabeth Neal MSc PhD RD
Research Dietitian, Matthew’s Friends Clinics
Honorary Research Associate, UCL – Institute of Child Health

Doose syndrome, also known as myoclonic astatic epilepsy (MAE) or epilepsy with myoclonic-atonic seizures, is a rare type of generalised epilepsy that was first described in 1970 (1). Onset is usually before the age of five years and multiple different seizure types develop including periods of non-convulsive status epilepticus in some children (2) Appropriate anti-epileptic drug (AED) therapy is usually used as an initial treatment for MAE, however failure of a first medication to control seizures will significantly reduce the likelihood of subsequent seizure freedom (3). International consensus recommendations suggest that the ketogenic diet (KD) should be strongly considered in a child with epilepsy which has failed to respond to two or three AEDs (4). Updated NICE guidelines on management of the epilepsies in adults and children also suggest that children and young people with epilepsy whose seizures have not responded to appropriate AEDs are referred to a tertiary paediatric epilepsy specialist for consideration of the KD (CG137,

The KD is a high fat, restricted carbohydrate regime that has been used as a treatment for epilepsy since the 1920s; efficacy of this type of dietary therapy has been demonstrated in many prospective studies and randomised trials (5, 6, 7). The diet has been shown to be particularly beneficial in MAE where seizures are often resistant to AEDs. One study from Argentina reported on 11 children with this syndrome: of six who remained on the KD after 18 months, all had over 50% seizure reduction including two who became seizure free and discontinued AEDs (8). A long-term follow-up study by the same investigators included 38 children with MAE of whom 11 (29%) were seizure free on KD (9). A French multi-centre study retrospectively reviewed 50 children with severe MAE, reporting 54% to be seizure free after 6 months or longer on KD with 86% experiencing over 70% seizure reduction after 2 months. Early diet treatment significantly resulted in seizure remission and was correlated with a better cognitive outcome (10).

An alternative more liberal type of KD is the modified Atkins diet (MAD). A review of 30 children with MAE who were observed for a mean of 19 months on MAD reported 25 (83%) of 30 patients had a seizure reduction of 50% or more with 14 (47%) seizure-free, concluding MAD could be used as an option to the more restrictive KD (11). Another review of nine children with MAE on dietary therapy reported that seven became seizure free within several weeks of starting a diet and were able to discontinue all AEDs: four were on MAD, two on traditional KD, and one started on MAD but needed to transition to KD to achieve full seizure freedom (12). An earlier review of 27 children with epilepsy, of whom nine had a MAE diagnosis, also found that some patients saw additional seizure benefits by switching from MAD to the stricter KD (13).

Two studies have examined outcomes following different treatments for MAE including diet and medications, although the KD was generally only used after failure of many AEDs. The first study reviewed 81 children from Japan including 26 who were treated with KD, 15 (58%) of whom became seizure free (14). The second study from USA reviewed 23 children including 10 who received KD, three of whom (30%) became seizure free (15). The authors of both studies concluded that the diet was the most effective of the treatment options in controlling seizures.

The KD is increasingly being recognised as one of the most efficacious treatments for MAE (16,17). As children with this syndrome may be particularly receptive to diet therapy (2), they should be given the chance to try this treatment option as early as possible in the course of their epilepsy. We propose that children with MAE who have failed appropriate AED therapy are funded for an initial assessment of suitability for KD therapy. Children who start a diet will require a minimum of three months on treatment to allow adequate assessment of benefit and appropriate fine-tuning of the prescription to a child’s individual needs. If seizure control is improved, it is likely that AEDs would be reduced or discontinued after that time. The KD is usually continued for least two years if successful.


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