Abstract:
PURPOSE:To determine the influence of valproate (VPA) treatment on acylcarnitines in children with epilepsy. METHODS:Determination of acylcarnitines (including free carnitine and acylcarnitines from C2 to C18) in dried blood spot specimens using tandem-mass spectrometry. Longitudinal study of changes in acylcarnitines in children under VPA treatment without pretreatment (group 1) or with pretreatment with other antiepileptic drugs (group 2) before the start of VPA treatment at an early and a late treatment interval (12-66, 90-260 days after the beginning of treatment, respectively). Cross-sectional comparison of these two VPA groups and of a group receiving carbamazepine monotherapy (group 3) with controls. RESULTS:Acylcarnitines in epileptic patients before VPA therapy did not differ from control values. In group 1, decreases of C0 (-26%), C2 (-12%), C16 (-31%), C18 (-41%), C(total) (-10%), increases of C5OH (+31%), C8 (+33%) in the early treatment interval, and decreases of C16 (-21%), C18 (-42%), and increases of C2 (+26%), C5OH (+44%) in the late treatment interval were significant. In group 2, both in the longitudinal and the cross-sectional study, only a decrease of C18 (-41%, -43%, respectively) in the late treatment interval was found. In group 3, no significant changes have been observed. CONCLUSIONS:We could prove changes in acylcarnitine subspecies, which were associated with VPA treatment in children with epilepsy. The treatment interval with the most marked changes coincides with the interval of highest risk for VPA-induced hepatotoxicity. The observed specific acylcarnitine pattern might point to the impaired intermediary metabolism that is responsible for VPA-induced hepatotoxicity.
journal_name
Epilepsiajournal_title
Epilepsiaauthors
Werner T,Treiss I,Kohlmueller D,Mehlem P,Teich M,Longin E,Gerstner T,Koenig SA,Schulze Adoi
10.1111/j.1528-1167.2006.00833.xsubject
Has Abstractpub_date
2007-01-01 00:00:00pages
72-6issue
1eissn
0013-9580issn
1528-1167pii
EPI833journal_volume
48pub_type
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