Daily oscillation of cognitive factors is modified in the temporal cortex of an amyloid β(1-42)-induced rat model of Alzheimer's disease.

Autor: Coria-Lucero C; Laboratorio de Cronobiología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis Instituto Multidisciplinario de Investigaciones Biológicas de San Luis (IMIBIO-SL), CONICET, Ejército de Los Andes 950, CP D5700HHW, San Luis, Argentina., Ledezma C; Laboratorio de Cronobiología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis Instituto Multidisciplinario de Investigaciones Biológicas de San Luis (IMIBIO-SL), CONICET, Ejército de Los Andes 950, CP D5700HHW, San Luis, Argentina., Castro A; Laboratorio de Cronobiología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis Instituto Multidisciplinario de Investigaciones Biológicas de San Luis (IMIBIO-SL), CONICET, Ejército de Los Andes 950, CP D5700HHW, San Luis, Argentina., Delgado S; Laboratorio de Biología de la Reproducción (LABIR), Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Instituto Multidisciplinario de Investigaciones Biológicas de San Luis (IMIBIO-SL), CONICET, Ejército de Los Andes 950, CP D5700HHW, San Luis, Argentina. Electronic address: sdelgado@unsl.edu.ar., Anzulovich AC; Laboratorio de Cronobiología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis Instituto Multidisciplinario de Investigaciones Biológicas de San Luis (IMIBIO-SL), CONICET, Ejército de Los Andes 950, CP D5700HHW, San Luis, Argentina. Electronic address: acanzu@unsl.edu.ar., Navigatore-Fonzo L; Laboratorio de Cronobiología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis Instituto Multidisciplinario de Investigaciones Biológicas de San Luis (IMIBIO-SL), CONICET, Ejército de Los Andes 950, CP D5700HHW, San Luis, Argentina. Electronic address: lnavigatore@unsl.edu.ar.
Jazyk: angličtina
Zdroj: Brain research bulletin [Brain Res Bull] 2021 May; Vol. 170, pp. 106-114. Date of Electronic Publication: 2021 Jan 27.
DOI: 10.1016/j.brainresbull.2021.01.014
Abstrakt: Alzheimer's disease (AD) is a devastating disease characterized by loss of synapses and neurons in the elderly. Accumulation of the β-amyloid peptide (Aβ) in the brain is thought to be central to the pathogenesis of AD. ApoE plays a key role in normal and physiological clearance of Aß, since it facilitates the peptide intra- and extracellular proteolytic degradation. Besides the cognitive deficit, AD patients also show alterations in their circadian rhythms. The objective of this study was to investigate the effects of an i.c.v. injection of Aβ (1-42) peptide on the 24 h rhythms of Apo E, BMAL1, RORα, Bdnf and trkB mRNA and Aβ levels in the rat temporal cortex. We found that an i.c.v. injection of Aβ aggregates phase shifts daily Bdnf expression as well as Apo E, BMAL1, RORα, Aβ and decreased the mesor of TrkB rhythms. Thus, elevated Aβ peptide levels might modify the temporal patterns of cognition-related factors, probably; by affecting the clock factors rhythms as well as in the 24 h rhythms of Apo E.
(Copyright © 2021. Published by Elsevier Inc.)
Databáze: MEDLINE