Early alteration of distribution and activity of hippocampal type-1 cannabinoid receptor in Alzheimer's disease-like mice overexpressing the human mutant amyloid precursor protein

Mauro Maccarrone, Antonio Totaro, Alessandro Leuti, Giacomo Giacovazzo, Lucia Scipioni, Dalila Mango, Roberto Coccurello, Robert Nisticò, Sergio Oddi

Research output: Contribution to journalArticlepeer-review

Abstract

Besides its involvement in Alzheimer's disease (AD) as precursor of the neurotoxic amyloid peptides, the pathophysiological impact of brain accumulation of amyloid precursor protein (APP) is not yet well understood. Recent studies reported that APP interacts with other membrane proteins, including G protein coupled receptors, affecting their biological functions. Here, we focused on the study of the potential impact of human mutant APP on expression, distribution and activity of type-1 cannabinoid (CB1) receptor in the hippocampus of Tg2576 mice, an AD-like mice model. By using biochemical and electrophysiological measures, we found that in a presymptomatic phase, when amyloid plaques have not yet formed and there is no sign of cognitive deficits, the over-expression of full-length APP in the hippocampus of Tg2576 mice altered membrane localization and inhibitory signalling activity of CB1 receptor, possibly by binding to the receptor and reducing its specific interaction with caveolin-1 and G proteins.

Original languageEnglish
JournalPharmacological Research
DOIs
Publication statusAccepted/In press - Jan 1 2018

Keywords

  • Alzheimer's disease
  • Amyloid precursor protein
  • Cannabinoid receptor
  • Hippocampus
  • Transgenic mice

ASJC Scopus subject areas

  • Pharmacology

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