Actigraphic evidence of persistent sleep disruption following repetitive mild traumatic brain injury in a gyrencephalic model.
Cereb Cortex
; 33(15): 9263-9279, 2023 07 24.
Article
em En
| MEDLINE
| ID: mdl-37310176
ABSTRACT
We studied the effect of multimodal traumatic brain injuries on daily sleep/activity patterns and related histology. Gyrencephalic ferrets wore actigraphs and received military-relevant brain injuries including shockwaves, strong rotational impact, and variable stress, which were evaluated up to 6 months post injury. Sham and Baseline animals exhibited activity patterns occurring in distinct clusters of high activity, interspersed with periods of low activity. In the Injury and Injury + Stress groups, activity clusters diminished and overall activity patterns became significantly more dispersed at 4 weeks post injury with significant sleep fragmentation. Additionally, the Injury + Stress group exhibited a significant decrease in daytime high activity up to 4 months post injury. At 4 weeks post injury, the reactive astrocyte (GFAP) immunoreactivity was significantly greater in both the injury groups compared to Sham, but did not differ at 6 months post injury. The intensity of immunoreactivity of the astrocytic endfeet that surround blood vessels (visualized with aquaporin 4; AQP4), however, differed significantly from Sham at 4 weeks post injury (in both injured groups) and at 6 months (Injury + Stress only). As the distribution of AQP4 plays a key role in the glymphatic system, we suggest that glymphatic disruption occurs in ferrets after the injuries described here.
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Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Concussão Encefálica
/
Lesões Encefálicas
/
Lesões Encefálicas Traumáticas
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
Cereb Cortex
Assunto da revista:
CEREBRO
Ano de publicação:
2023
Tipo de documento:
Article
País de afiliação:
Estados Unidos