Atorvastatin prevents hippocampal cell death due to quinolinic acid-induced seizures in mice by increasing Akt phosphorylation and glutamate uptake

Neurotox Res. 2009 Aug;16(2):106-15. doi: 10.1007/s12640-009-9057-6. Epub 2009 May 2.

Abstract

Statins are cholesterol-lowering agents due to the inhibition of 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase. Recent studies have shown statins possess pleiotropic effects, which appear to be independent from its cholesterol-lowering action. In this study, we investigated whether atorvastatin would have protective effects against hippocampal cell death promoted by quinolinic acid (QA)-induced seizures in mice. Mice were pretreated with Atorvastatin (1 or 10 mg/kg) or vehicle (saline, 0.9%), orally, once a day for 7 days before the intracerebroventricular (i.c.v.) QA infusion (36.8 nmol/site). Atorvastatin treatment with 1 mg/kg/day did not significantly prevent QA-induced seizures (13.34%). However, administration of atorvastatin 10 mg/kg/day prevented the clonic and/or tonic seizures induced by QA in 29.41% of the mice. Additionally, administration of atorvastatin 10 mg/kg/day significantly prevented QA-induced cell death in the hippocampus. Atorvastatin treatment promoted an increased Akt phosphorylation, which was sustained after QA infusion in both convulsed and non-convulsed mice. Moreover, atorvastatin pretreatment prevented the reduction in glutamate uptake into hippocampal slices induced by QA i.c.v. infusion. These results show that atorvastatin attenuated QA-induced hippocampal cellular death involving the Akt pathway and glutamate transport modulation. Therefore, atorvastatin treatment might be a useful strategy in the prevention of brain injury caused by the exacerbation of glutamatergic toxicity in neurological diseases such as epilepsy.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Analysis of Variance
  • Animals
  • Atorvastatin
  • Cell Death / drug effects
  • Complex Mixtures / metabolism
  • Disease Models, Animal
  • Dose-Response Relationship, Drug
  • Drug Administration Schedule
  • Heptanoic Acids / pharmacology
  • Heptanoic Acids / therapeutic use*
  • Hippocampus / drug effects*
  • Hippocampus / pathology
  • Hydroxymethylglutaryl-CoA Reductase Inhibitors / pharmacology
  • Hydroxymethylglutaryl-CoA Reductase Inhibitors / therapeutic use*
  • In Vitro Techniques
  • Male
  • Mice
  • Oncogene Protein v-akt / metabolism*
  • Phosphorylation / drug effects
  • Pyrroles / pharmacology
  • Pyrroles / therapeutic use*
  • Quinolinic Acid*
  • Seizures* / chemically induced
  • Seizures* / pathology
  • Seizures* / prevention & control
  • Tetrazolium Salts
  • Thiazoles
  • Tritium / metabolism

Substances

  • Complex Mixtures
  • Heptanoic Acids
  • Hydroxymethylglutaryl-CoA Reductase Inhibitors
  • Pyrroles
  • Tetrazolium Salts
  • Thiazoles
  • Tritium
  • glutamevit
  • Atorvastatin
  • Oncogene Protein v-akt
  • thiazolyl blue
  • Quinolinic Acid