Neuroprotective effects of atorvastatin against glutamate-induced excitotoxicity in primary cortical neurones

J Neurochem. 2005 Mar;92(6):1386-98. doi: 10.1111/j.1471-4159.2004.02980.x.

Abstract

Statins [3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase inhibitors] exert cholesterol-independent pleiotropic effects that include anti-thrombotic, anti-inflammatory, and anti-oxidative properties. Here, we examined direct protective effects of atorvastatin on neurones in different cell damage models in vitro. Primary cortical neurones were pre-treated with atorvastatin and then exposed to (i) glutamate, (ii) oxygen-glucose deprivation or (iii) several apoptosis-inducing compounds. Atorvastatin significantly protected from glutamate-induced excitotoxicity as evidenced by propidium iodide staining, nuclear morphology, release of lactate dehydrogenase, and mitochondrial tetrazolium metabolism, but not from oxygen-glucose deprivation or apoptotic cell death. This anti-excitototoxic effect was evident with 2-4 days pre-treatment but not with daily administration or shorter-term pre-treatment. The protective properties occurred independently of 3-hydroxy-3-methylglutaryl-CoA reductase inhibition because co-treatment with mevalonate or other isoprenoids did not reverse or attenuate neuroprotection. Atorvastatin attenuated the glutamate-induced increase of intracellular calcium, which was associated with a modulation of NMDA receptor function. Taken together, atorvastatin exerts specific anti-excitotoxic effects independent of 3-hydroxy-3-methylglutaryl-CoA reductase inhibition, which has potential therapeutic implications.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acyl Coenzyme A / antagonists & inhibitors
  • Acyl Coenzyme A / metabolism
  • Animals
  • Apoptosis / drug effects
  • Apoptosis / physiology
  • Atorvastatin
  • Calcium Signaling / drug effects
  • Calcium Signaling / physiology
  • Cells, Cultured
  • Cerebral Cortex / drug effects*
  • Cerebral Cortex / metabolism
  • Cerebral Cortex / physiopathology
  • Glucose / deficiency
  • Glutamic Acid / metabolism
  • Glutamic Acid / toxicity*
  • Heptanoic Acids / pharmacology*
  • Hydroxymethylglutaryl-CoA Reductase Inhibitors / pharmacology
  • Hypoglycemia / drug therapy
  • Hypoglycemia / metabolism
  • Hypoxia-Ischemia, Brain / drug therapy
  • Hypoxia-Ischemia, Brain / metabolism
  • Mitochondria / drug effects
  • Mitochondria / metabolism
  • Neurons / drug effects*
  • Neurons / metabolism
  • Neuroprotective Agents / pharmacology*
  • Neurotoxins / antagonists & inhibitors*
  • Neurotoxins / metabolism
  • Neurotoxins / toxicity
  • Pyrroles / pharmacology*
  • Rats
  • Receptors, Glutamate / drug effects
  • Receptors, Glutamate / metabolism

Substances

  • Acyl Coenzyme A
  • Heptanoic Acids
  • Hydroxymethylglutaryl-CoA Reductase Inhibitors
  • Neuroprotective Agents
  • Neurotoxins
  • Pyrroles
  • Receptors, Glutamate
  • 3-hydroxy-3-methylglutaryl-coenzyme A
  • Glutamic Acid
  • Atorvastatin
  • Glucose