Related Experiment Video
Updated: Jul 17, 2026

Isolation, Characterization, And High Throughput Extracellular Flux Analysis of Mouse Primary Renal Tubular Epithelial Cells
Published on: June 20, 2018
Evaluation of renal tubular function in children taking anti-epileptic treatment
Bulent Unay1, Ridvan Akin, S Umit Sarici
1Department of Pediatrics, Güdhane Military Medical Academy, Ankara, Turkey. bulentunay@yahoo.com
Insights
Valproate and carbamazepine anti-epileptic drugs may impair renal tubular function in children, as indicated by elevated N-acetyl-beta-D-glucosaminidase levels. Lamotrigine showed no significant effect on kidney function in this study.
Area of Science:
- Nephrology
- Pharmacology
- Pediatrics
Background:
- Epilepsy is a common neurological disorder affecting children.
- Anti-epileptic drugs (AEDs) are crucial for managing seizures but can have side effects.
- Renal tubular function is vital for maintaining homeostasis and can be affected by certain medications.
Purpose of the Study:
- To evaluate the impact of specific AEDs on renal tubular function in pediatric patients.
- To assess whether valproate, carbamazepine, lamotrigine, or combination therapy affects kidney function.
Main Methods:
- Urinary N-acetyl-beta-D-glucosaminidase (NAG) activity was measured in 114 epileptic children.
- Patients were on monotherapy with valproate, carbamazepine, lamotrigine, or combined therapy.
- NAG levels were compared to a control group, and correlations with drug concentration and therapy duration were analyzed.
Main Results:
- Valproate, carbamazepine, and polytherapy significantly elevated urinary NAG levels compared to controls.
- Lamotrigine treatment did not result in significant changes in NAG levels.
- Elevated NAG levels correlated with longer treatment duration and higher serum concentrations of valproate and carbamazepine.
Conclusions:
- Valproate and carbamazepine therapy in children may be associated with impaired renal tubular function.
- Lamotrigine appears to be a safer alternative regarding renal tubular effects.
- Monitoring renal function is advisable for children on long-term valproate or carbamazepine treatment.
Aim:
To assess the effects of anti-epileptic drugs on renal tubular function.
Methods:
Urinary N-acetyl-beta-D-glucosaminidase activity was measured in 114 epileptic children (mean age 5.6 +/- 1.1 years) who were undergoing monotherapy with valproate (n = 46), carbamazepine (n = 34), lamotrigine (n = 13) and combined therapy with valproate+carbamazepine (n = 21).
Results:
The urinary N-acetyl-beta-D-glucosaminidase index of valproate (P < 0.01), carbamazepine (P < 0.05) and polytherapy group (P < 0.01) were significantly elevated when compared with that of the control group. No significant difference in N-acetyl-beta-D-glucosaminidase levels was found between the lamotrigine group and the control subjects. We found that the distribution of the N-acetyl-beta-D-glucosaminidase values of patients depended significantly on the length of therapy (P < 0.01). The level of urinary excretion of N-acetyl-beta-D-glucosaminidase was significantly higher in the patients who were taking long-term treatment (>10 years) with valproate, carbamazepine and combined therapy than those taking therapy shorter than 10 years (P < 0.01). The mean serum concentrations of valproate and carbamazepine were 68.7 +/- 17.44 microg/mL and 5.41 +/- 1.23 microg/mL, respectively. There was a significant correlation between the serum concentration of valproate and urinary N-acetyl-beta-D-glucosaminidase levels (r = 0.44, P < 0.01). There was also a significant correlation between the serum concentration of carbamazepine and N-acetyl-beta-D-glucosaminidase excretion (r = 0.52, P < 0.01).
Conclusion:
The present study demonstrated that in patients treated with valproate and carbamazepine, an impairment of tubular function can be present, whereas lamotrigine does not cause any significant change.
Related Concept Videos
Pharmacokinetics in Pediatric Patients: Drug Excretion
Renal Drug Excretion: Tubular Secretion
Acute Kidney Injury IV: Diagnostic Studies and Prevention
Drug Dosing in Renal Diseases: Estimation of Glomerular Filtration Rate Based on Serum Creatinine Concentration
Factors Affecting Renal Clearance: Renal Impairment
One condition associated with renal failure is uremia. Uremia is characterized by impaired glomerular filtration and fluid accumulation in the body. This condition hinders the renal clearance of drugs, resulting in drug accumulation and potential...
Drug Dosing in Renal Diseases: Measurement of Glomerular Filtration Rate