Enhancement of NMDA responses by β-amyloid peptides in the hippocampus in vivo

Zsolt Molnár, Katalin Soós, Imre Lengyel, Botond Penke, Viktor Szegedi, Dénes Budai*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)


The effects of Alzheimer's disease-related beta-amyloid (Aβ) peptides on the N-methyl-D-aspartate (NMDA)-evoked cell firing rate were studied in hippocampal CA1 neurons of the rat. Extracellular single-unit recordings were combined with iontophoretic applications that allowed quantitative analyses of the interactions between Aβ peptides and NMDA receptor-mediated events in vivo. The NMDA responses were significantly increased both by the full length Aβ1-42 and by its model fragment Aβ25-35. Enhancements of the NMDA responses by the Aβ peptides lasted about 15 min and were irreversible. The effects of Aβ25-35 were prevented by the pentapeptide Lys-Leu-Val-Gly-Phe- amide (KLVGF) and were not evoked when its reversed sequence (Aβ35-25) was applied.

Original languageEnglish
Pages (from-to)1649-1652
Number of pages4
Issue number10
Publication statusPublished - 19 Jul 2004
Externally publishedYes


  • Alzheimer's disease
  • Amyloid β-peptide
  • Amyloid fragment
  • Microiontophoresis
  • NMDA
  • Rat
  • Single-unit recording

ASJC Scopus subject areas

  • General Neuroscience


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