Silencing of amygdala circuits during sepsis prevents the development of anxiety-related behaviours.
Brain
; 145(4): 1391-1409, 2022 05 24.
Article
em En
| MEDLINE
| ID: mdl-35441215
ABSTRACT
Sepsis is a life-threatening condition induced by a deregulated host response to severe infection. Post-sepsis syndrome includes long-term psychiatric disorders, such as persistent anxiety and post-traumatic stress disorder, whose neurobiological mechanisms remain unknown. Using a reference mouse model of sepsis, we showed that mice that recovered from sepsis further developed anxiety-related behaviours associated with an exaggerated fear memory. In the brain, sepsis induced an acute pathological activation of a specific neuronal population of the central nucleus of the amygdala, which projects to the ventral bed nucleus of the stria terminalis. Using viral-genetic circuit tracing and in vivo calcium imaging, we observed that sepsis induced persistent changes in the connectivity matrix and in the responsiveness of these central amygdala neurons projecting to the ventral bed nucleus of the stria terminalis. The transient and targeted silencing of this subpopulation only during the acute phase of sepsis with a viral pharmacogenetic approach, or with the anti-epileptic and neuroprotective drug levetiracetam, prevented the subsequent development of anxiety-related behaviours. Specific inhibition of brain anxiety and fear circuits during the sepsis acute phase constitutes a preventive approach to preclude the post-infection psychiatric outcomes.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Sepse
/
Núcleo Central da Amígdala
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Brain
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
França