NMDA receptors and metaplasticity: mechanisms and possible roles in neuropsychiatric disorders

Neurosci Biobehav Rev. 2012 Mar;36(3):989-1000. doi: 10.1016/j.neubiorev.2011.12.011. Epub 2012 Jan 2.

Abstract

N-methyl-D-aspartate receptors (NMDARs) are key components of neural signaling, playing roles in synaptic transmission and in the synaptic plasticity thought to underlie learning and memory. NMDAR activation can also have neurotoxic consequences contributing to several forms of neurodegeneration. Additionally, NMDARs can modulate neuronal function and regulate the ability of synapses to undergo synaptic plasticity. Evidence gathered over the past 20 years strongly supports the idea that untimely activation of NMDARs impairs the induction of long-term potentiation (LTP) by a form of metaplasticity. This metaplasticity can be triggered by multiple stimuli including physiological receptor activation, and metabolic and behavioral stressors. These latter findings raise the possibility that NMDARs contribute to cognitive dysfunction associated with neuropsychiatric disorders. This paper examines NMDAR metaplasticity and its potential role in cognition. Recent studies using NMDAR antagonists for therapeutic purposes also raise the possibility that metaplasticity may contribute to clinical effects of certain drugs.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Hippocampus / metabolism
  • Hippocampus / physiology
  • Humans
  • Learning / physiology
  • Learning Disabilities / drug therapy
  • Learning Disabilities / etiology*
  • Long-Term Potentiation / drug effects
  • Long-Term Potentiation / physiology*
  • Memory / physiology
  • Memory Disorders / drug therapy
  • Memory Disorders / etiology*
  • Neuronal Plasticity / drug effects
  • Neuronal Plasticity / physiology*
  • Neurons / metabolism
  • Receptors, N-Methyl-D-Aspartate / metabolism
  • Receptors, N-Methyl-D-Aspartate / physiology*
  • Signal Transduction / physiology
  • Synapses / drug effects
  • Synapses / metabolism
  • Synapses / physiology
  • Synaptic Transmission / physiology

Substances

  • Receptors, N-Methyl-D-Aspartate