Increased d-aspartate brain content rescues hippocampal age-related synaptic plasticity deterioration of mice

Francesco Errico, Robert Nisticò, Francesco Napolitano, Carmen Mazzola, Dalila Astone, Teresa Pisapia, Michela Giustizieri, Antimo D'Aniello, Nicola B. Mercuri, Alessandro Usiello

Research output: Contribution to journalArticlepeer-review

Abstract

Until recently, free d-amino acids were thought to be involved only in bacterial physiology. Nevertheless, today there is evidence that d-serine, by acting as co-agonist at NMDARs, plays a role in controlling neuronal functions in mammals. Besides d-serine, another d-amino acid, d-aspartate (d-Asp), is found in the mammalian brain with a temporal gradient of occurrence: high in embryo and low in adult. In this study, we demonstrate that d-Asp acts as an endogenous NMDAR agonist, since it triggers currents via interaction with each of NR2A-D receptor subunits. According to its pharmacological features, we showed that oral administration of d-Asp strongly enhances NMDAR-dependent LTP in adulthood and, in turn, completely rescues the synaptic plasticity decay observed in the hippocampus of aged animals. Therefore, our findings suggest a tantalizing hypothesis for which this in-embryo-occurring d-amino acid, when "forced" over its physiological content, may disclose plasticity windows inside which it counteracts the age-related reduction of NMDAR signaling.

Original languageEnglish
Pages (from-to)2229-2243
Number of pages15
JournalNeurobiology of Aging
Volume32
Issue number12
DOIs
Publication statusPublished - Dec 2011

Keywords

  • Brain aging
  • D-Aspartate
  • Hippocampus
  • NMDA receptors
  • Reference memory
  • Synaptic plasticity

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)
  • Ageing
  • Developmental Biology
  • Geriatrics and Gerontology

Fingerprint Dive into the research topics of 'Increased d-aspartate brain content rescues hippocampal age-related synaptic plasticity deterioration of mice'. Together they form a unique fingerprint.

Cite this