Depression exacerbates AD pathology through lactate-dependent activation of microglial Kv1.3 to promote Aβ-containing exosome spreading.

ABSTRACT: Depression has been widely recognized as an important accelerating factor contributing to the aggravation of cognitive decline in Alzheimer's disease (AD) patients. Previous studies show that microglia-mediated neuroinflammation is a common and critical event in the etiology of both depression and dementia, but whether and how microglia participate in the process of depression-exacerbating AD pathology is largely unknown. By establishing the learned helplessness depression model on 5×FAD mice, we confirmed that depression can indeed promote Aβ plaque deposition and deteriorate the cognitive performance of the AD mice. Importantly, we found that microglial lactate concentration is dramatically increased in the depressed AD brain, leading to activation of potassium channel Kv1.3 likely throu

SUBMITTER: Liu X 

PROVIDER: S-EPMC12205523 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature