Selenium, zinc, and copper changes with valproic acid: possible relation to drug side effects

Area of Science:

• Biochemistry
• Pharmacology
• Toxicology

Background:

• Anticonvulsant valproic acid (VPA) treatment has been linked to potential alterations in trace metal status.
• Hepatotoxicity is a known side effect of VPA, particularly in pediatric patients.

Purpose of the Study:

• To investigate the effect of valproic acid administration on trace metal levels in rats.
• To examine the relationship between chronic VPA treatment and plasma selenium concentrations in patients.
• To explore the potential role of selenium depletion in VPA-associated hepatotoxicity.

Main Methods:

• Rats were administered VPA for one week to assess plasma and hepatic trace metal changes.
• Plasma selenium levels were measured in patients receiving chronic VPA monotherapy.

Main Results:

• VPA administration led to significant depletion of zinc and selenium in rat plasma.
• Hepatic selenium levels were reduced by approximately one-third in rats treated with VPA.
• Patients on chronic VPA treatment exhibited decreased plasma selenium levels.

Conclusions:

• Valproic acid treatment can cause significant depletion of essential trace metals, specifically zinc and selenium.
• Reduced selenium concentrations may impair the body's defense against peroxidative damage, potentially contributing to VPA-induced hepatotoxicity in children.
• Further research is warranted to elucidate the precise mechanisms and clinical implications of VPA's effect on trace metal metabolism.