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.
Abstract

Related Concept Videos

Pharmacokinetics in Pediatric Patients: Drug Excretion01:26

Pharmacokinetics in Pediatric Patients: Drug Excretion

In pediatric medicine, understanding the renal function and drug elimination nuances is crucial for administering safe and effective treatments. Newborns, in particular, display markedly slower renal functions than adults, profoundly affecting how drugs are cleared from their bodies. This slower drug clearance requires clinicians to extend the dosing intervals for many medications to prevent drug accumulation and toxicity while ensuring therapeutic efficacy.One key area where these adjustments...
Renal Drug Excretion: Tubular Secretion01:28

Renal Drug Excretion: Tubular Secretion

Active tubular secretion is a robust, energy-demanding process that utilizes carrier systems to transport drugs into renal tubules. The active renal secretion systems include the organic anion transporter (OAT) for weak acids and the organic cation transporter (OCT) for weak bases. Structurally similar drugs can compete for the same transporter, potentially leading to drug accumulation and toxicity. However, this principle can be exploited therapeutically. One example is probenecid (Probalan),...
Acute Kidney Injury IV: Diagnostic Studies and Prevention01:30

Acute Kidney Injury IV: Diagnostic Studies and Prevention

Accurate diagnosis and effective prevention are critical in managing Acute Kidney Injury (AKI), which is linked to high mortality rates ranging from 10% to 80%. Timely recognition of at-risk patients and careful monitoring can significantly reduce the likelihood of kidney damage.Diagnostic Assessments:The diagnostic process starts with a comprehensive medical history to identify prerenal, intrarenal, and postrenal causes.Prerenal causes, such as dehydration, hypotension, or blood loss, should...
Drug Dosing in Renal Diseases: Estimation of Glomerular Filtration Rate Based on Serum Creatinine Concentration01:28

Drug Dosing in Renal Diseases: Estimation of Glomerular Filtration Rate Based on Serum Creatinine Concentration

Glomerular filtration rate (GFR) can be estimated from serum creatinine using the modification of diet in renal disease (MDRD) formula or the chronic kidney disease–epidemiology collaboration (CKD–EPI) equation. Both methods are widely used in clinical practice to assess kidney function and guide treatment decisions.The MDRD equation does not require weight or height measurements and is normalized to the body surface area of 1.73 m², considered the average adult surface area. This equation is...
Factors Affecting Renal Clearance: Renal Impairment01:17

Factors Affecting Renal Clearance: Renal Impairment

Renal dysfunction significantly impairs the renal clearance of drugs, leading to potential complications in drug therapy. Renal failure, which can be caused by various factors, poses a significant challenge in the elimination of drugs from the body.
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 Rate01:25

Drug Dosing in Renal Diseases: Measurement of Glomerular Filtration Rate

The glomerular filtration rate (GFR) is a critical indicator of kidney health, reflecting how well the kidneys filter blood. Changes in GFR can signal potential kidney impairment, necessitating accurate measurement methods to monitor kidney function effectively.Various molecules can serve as markers for GFR measurement, with the ideal marker meeting several specific criteria. It must freely filter at the glomerulus, avoid reabsorption or secretion by the renal tubules, remain unmetabolized, not...