A2A Adenosine Receptor Exacerbates Synaptic Loss and Memory Deficits in APP/PS1 Mice Alzheimer’s disease (AD) is a neurodegenerative disorder associated with progressive cognitive decline, characterized by the deposition of extracellular β-amyloid (Aβ) plaques and the accumulation of hyperphosphorylated tau protein in neurons. Some epidemiological ...