Astrocytic adenosine receptor A2A and Gs-coupled signaling regulate memory Academic Article uri icon

Overview

MeSH Major

  • Astrocytes
  • Gene Expression Regulation
  • Memory, Long-Term
  • Receptor, Adenosine A2A
  • Receptors, Serotonin, 5-HT4
  • Signal Transduction

abstract

  • Astrocytes express a variety of G protein-coupled receptors and might influence cognitive functions, such as learning and memory. However, the roles of astrocytic Gs-coupled receptors in cognitive function are not known. We found that humans with Alzheimer's disease (AD) had increased levels of the Gs-coupled adenosine receptor A2A in astrocytes. Conditional genetic removal of these receptors enhanced long-term memory in young and aging mice and increased the levels of Arc (also known as Arg3.1), an immediate-early gene that is required for long-term memory. Chemogenetic activation of astrocytic Gs-coupled signaling reduced long-term memory in mice without affecting learning. Like humans with AD, aging mice expressing human amyloid precursor protein (hAPP) showed increased levels of astrocytic A2A receptors. Conditional genetic removal of these receptors enhanced memory in aging hAPP mice. Together, these findings establish a regulatory role for astrocytic Gs-coupled receptors in memory and suggest that AD-linked increases in astrocytic A2A receptor levels contribute to memory loss.

publication date

  • January 2015

Research

keywords

  • Academic Article

Identity

Language

  • eng

PubMed Central ID

  • PMC4340760

Digital Object Identifier (DOI)

  • 10.1038/nn.3930

PubMed ID

  • 25622143

Additional Document Info

start page

  • 423

end page

  • 34

volume

  • 18

number

  • 3