JOURNAL ARTICLE

Idebenone treatment in paediatric and adult patients with Friedreich ataxia: long-term follow-up

Mercè Pineda, Javier Arpa, Raquel Montero, Asunción Aracil, Francisco Domínguez, Marta Galván, Anna Mas, Loreto Martorell, Cristina Sierra, Nuria Brandi, Elena García-Arumí, Miquel Rissech, Daniel Velasco, Juan A Costa, Rafael Artuch
European Journal of Paediatric Neurology: EJPN 2008, 12 (6): 470-5
18234531

BACKGROUND: Antioxidant therapy is a new therapeutical approach for patients with Friedreich ataxia.

AIMS: To assess the effectiveness of long-term idebenone treatment in Friedreich ataxia patients.

METHODS: An open-labelled prospective study. Ten paediatric patients (age range 8-18 years) and 14 adults (age range 18-46 years) with genetic diagnosis of Friedreich ataxia were treated with idebenone (5-20mg/kg/day) for 3-5 years. Neurological evolution was evaluated using the International Cooperative Ataxia Rating Scale (ICARS), and cardiological outcomes using echocardiography.

RESULTS: In paediatric patients, no significant differences were observed in ICARS scores and echocardiographic measurements when comparing baseline status and after 5 years of follow-up. Concerning adult cases, ICARS scores showed a significant increase in neurological dysfunctions during 3 years of therapy (Wilcoxon test, p=0.005), while echocardiographic measurements remained unchanged.

CONCLUSIONS: Our results indicate that longer-term idebenone treatment prevented progression of cardiomyopathy in both paediatric and adult patients, whereas its stabilizing effect on neurological dysfunction was present only in the paediatric population, mainly before puberty. This suggests that the age at which idebenone treatment is initiated may be an important factor in the effectiveness of the therapy.

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