Targeting BACE1-mediated production of amyloid beta improves hippocampal synaptic function in an experimental model of ischemic stroke.
J Cereb Blood Flow Metab
; 43(2_suppl): 66-77, 2023 11.
Article
en En
| MEDLINE
| ID: mdl-37150606
ABSTRACT
Post-stroke cognitive impairment and dementia (PSCID) affects many survivors of large vessel cerebral ischemia. The molecular pathways underlying PSCID are poorly defined but may overlap with neurodegenerative pathophysiology. Specifically, synaptic dysfunction after stroke may be directly mediated by alterations in the levels of amyloid beta (Aß), the peptide that accumulates in the brains of Alzheimer's disease (AD) patients. In this study, we use the transient middle cerebral artery occlusion (MCAo) model in young adult mice to evaluate if a large vessel stroke increases brain soluble Aß levels. We show that soluble Aß40 and Aß42 levels are increased in the ipsilateral hippocampus in MCAo mice 7 days after the injury. We also analyze the level and activity of ß-site amyloid precursor protein cleaving enzyme 1 (BACE1), an enzyme that generates Aß in the brain, and observe that BACE1 activity is increased in the ipsilateral hippocampus of the MCAo mice. Finally, we highlight that treatment of MCAo mice with a BACE1 inhibitor during the recovery period rescues stroke-induced deficits in hippocampal synaptic plasticity. These findings support a molecular pathway linking ischemia to alterations in BACE1-mediated production of Aß, and encourage future studies that evaluate whether targeting BACE1 activity improves the cognitive deficits seen with PSCID.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Accidente Cerebrovascular
/
Accidente Cerebrovascular Isquémico
Tipo de estudio:
Prognostic_studies
Límite:
Animals
/
Humans
Idioma:
En
Revista:
J Cereb Blood Flow Metab
Año:
2023
Tipo del documento:
Article
País de afiliación:
Estados Unidos