Report on the 124th ENMC International Workshop. Treatment of Duchenne muscular dystrophy; defining the gold standards of management in the use of corticosteroids 2–4 April 2004, Naarden, The Netherlands

Abstract

Thirty-two participants representing parents, funding agencies and clinicians involved in the care of children with Duchenne Muscular Dystrophy (DMD) from Belgium, Canada, Denmark, Finland, France, Germany, Italy, the Netherlands, Spain, Sweden, the UK and the USA met in Naarden on 2–4th April 2004. The meeting was held under the auspices of the ENMC Clinical Trials Network, and with the additional support of the United Parent Project. The aims of the workshop were to define the need for clinical trials in DMD and develop a protocol for such trials, relating primarily to the use of steroids (prednisolone, prednisone and deflazacort) in DMD. The first part of the meeting summarised the current state of practice on the use of steroids in DMD. Elizabeth Vroom (Netherlands) and Pat Furlong (USA) presented the views of parents surveyed by questionnaire by the United Parent Project. A major worry for parents was the lack of use of steroids at all in some countries, the multiplicity of steroid regimes used and the problems of getting firm information about which type of steroid or which regime for using steroids was best. This was reflected in the variation in practice amongst the participants at the Workshop, who between them used at least seven different regimes for giving steroids, and some did not use steroids at all. Adnan Manzur (UK), co-author of the Cochrane report on the use of glucocorticosteroids in DMD described the major findings of this systematic review [1]. Only five randomised controlled trials of the use of steroids in DMD were published in sufficient detail to be able to be included in the review. These trials did, however, present evidence that use of daily prednisolone (0.75 mg/kg per day) or deflazacort (0.9 mg/kg per day) increased strength in DMD. Robert Griggs, Richard Moxley (USA) and Doug Biggar (Canada) were able to confirm that long-term follow up of cohorts of patients treated under one or other of these regimes and who mostly continued using steroids beyond the loss of independent ambulation shows that this increase in strength is mirrored by improvement in function (with age at loss of ambulation in the mid teens, preservation of respiratory function, lack of need for scoliosis surgery and possibly preservation of cardiac function) [2–4]. With longterm use of steroids, the per kilogram dose of corticosteroid tended to reduce with time. In some cases, this was in response to side effects such as weight gain or behaviour changes, but in the majority represented a tendency not to keep up strictly with change in weight over time. Many different regimes for giving steroids in DMD have been suggested as a way to reduce the risk of the well-known side effects associated with the long-term use of daily steroids. The dose of 0.75 mg/kg per day was shown to be Neuromuscular Disorders 14 (2004) 526–534 www.elsevier.com/locate/nmd