Vascular function and risk factors in children with epilepsy: associations with sodium valproate and carbamazepine.

Abstract:

AIM:To investigate biochemical cardiovascular risk factors and vascular endothelial function and structure in children with epilepsy on antiepileptic drugs (AEDs), particularly sodium valproate (VPA) and carbamazepine (CBZ). BACKGROUND:Individuals with epilepsy have increased risk factors for vascular disease, particularly lipid abnormalities and elevated total plasma homocyst(e)ine (tHcy). AED induced B-vitamin deficiencies have been suggested to contribute to this risk. Vitamin B supplementation has consequently been recommended for children on AEDs. Early vascular endothelial dysfunction and atherosclerosis are detectable by measuring flow-mediated dilation (FMD) and intima-media thickness (IMT). METHODS:Thirty children with epilepsy on AEDs (13.3±2.3 years, 14 male) and 30 controls (13.9±2.9 years, 14 male) were recruited. Fasting tHcy, folate, pyridoxal-5-phosphate (PLP), vitamin B12, glucose and lipids were measured. Vascular function and structure were assessed using FMD (brachial artery) and IMT (carotid/aortic arteries). RESULTS:No differences were found between children with epilepsy and controls for tHcy, folate, PLP, lipids, FMD, carotid or aortic IMT. Vitamin B12 levels were elevated and glucose reduced in children treated with VPA. Elevated total cholesterol, cholesterol/HDL ratio and triglycerides occurred in children treated with CBZ. Aortic IMT correlated with weight (r=0.75, p<0.001), BMI (r=0.54, p=0.01), and HDL cholesterol (r=-0.58, p=0.006). CONCLUSION:We found no early changes in vascular function or structure in children on valproate or carbamazepine. We were also unable to confirm previous reports of tHcy abnormalities in this group. This may be due to higher B-vitamin intake, which compensates for loss of vitamins induced by this AED therapy. Vitamin supplementation in children with epilepsy on valproate and carbamazepine is not required in populations with adequate dietary intake of B vitamins.

journal_name

Epilepsy Res

journal_title

Epilepsy research

authors

Keenan N,Sadlier LG,Wiltshire E

doi

10.1016/j.eplepsyres.2014.04.006

subject

Has Abstract

pub_date

2014-08-01 00:00:00

pages

1087-94

issue

6

eissn

0920-1211

issn

1872-6844

pii

S0920-1211(14)00122-3

journal_volume

108

pub_type

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