Childhood trauma, IL-6 and weaker suppression of the default mode network (DMN) during theory of mind (ToM) performance in schizophrenia.
Journal
Brain, behavior, & immunity - health
ISSN: 2666-3546
Titre abrégé: Brain Behav Immun Health
Pays: United States
ID NLM: 101759062
Informations de publication
Date de publication:
Dec 2022
Dec 2022
Historique:
received:
05
07
2022
revised:
21
10
2022
accepted:
22
10
2022
entrez:
17
11
2022
pubmed:
18
11
2022
medline:
18
11
2022
Statut:
epublish
Résumé
Both low-grade systemic inflammation and functional connectivity of the default mode network (DMN) 51 patients with schizophrenia (SZ) or schizoaffective disorder (SZA) and 176 healthy participants completed a theory of mind (ToM) task during fMRI. IL-6 was measured in plasma using ELISA. DMN connectivity was measured during performance of the fMRI ToM task. To examine DMN connectivity, we selected 4 a priori seeds of the DMN, i.e., the medial prefrontal cortex (PFC), right lateral parietal (LP), left LP, and posterior cingulate cortex (PCC) according to the Harvard-Oxford Cortical and Subcortical Atlas (http://www.cma.mgh.harvard.edu/fsl_atlas.html) as implemented in CONN. Patients showed significantly increased DMN connectivity compared to healthy participants between each of the four seeds of the DMN and with other clusters in the brain. Across the entire sample, higher levels of IL-6 predicted increased connectivity between the mPFC and regions encompassing the cerebellum (<0.001 FWE). IL-6 mediated the association between physical neglect and weaker suppression of the posterior cingulate cortex (PCC) DMN seed -left precentral and postcentral gyrus (β This is the first study to our knowledge that provides evidence that higher plasma IL-6 mediates the association between higher childhood neglect and increased DMN connectivity during ToM task performance. Consistent with our previous study that IL-6 mediated the association between early life stress exposure and reduced connectivity of the DMN during rest, here IL-6 mediated the association between early life stress and increased connectivity of the DMN during ToM based cognitive processing. These findings suggest a biological mechanism for how chronic stress impacts social cognitive processing.
Sections du résumé
Background
UNASSIGNED
Both low-grade systemic inflammation and functional connectivity of the default mode network (DMN)
Methods
UNASSIGNED
51 patients with schizophrenia (SZ) or schizoaffective disorder (SZA) and 176 healthy participants completed a theory of mind (ToM) task during fMRI. IL-6 was measured in plasma using ELISA. DMN connectivity was measured during performance of the fMRI ToM task. To examine DMN connectivity, we selected 4 a priori seeds of the DMN, i.e., the medial prefrontal cortex (PFC), right lateral parietal (LP), left LP, and posterior cingulate cortex (PCC) according to the Harvard-Oxford Cortical and Subcortical Atlas (http://www.cma.mgh.harvard.edu/fsl_atlas.html) as implemented in CONN.
Results
UNASSIGNED
Patients showed significantly increased DMN connectivity compared to healthy participants between each of the four seeds of the DMN and with other clusters in the brain. Across the entire sample, higher levels of IL-6 predicted increased connectivity between the mPFC and regions encompassing the cerebellum (<0.001 FWE). IL-6 mediated the association between physical neglect and weaker suppression of the posterior cingulate cortex (PCC) DMN seed -left precentral and postcentral gyrus (β
Discussion
UNASSIGNED
This is the first study to our knowledge that provides evidence that higher plasma IL-6 mediates the association between higher childhood neglect and increased DMN connectivity during ToM task performance. Consistent with our previous study that IL-6 mediated the association between early life stress exposure and reduced connectivity of the DMN during rest, here IL-6 mediated the association between early life stress and increased connectivity of the DMN during ToM based cognitive processing. These findings suggest a biological mechanism for how chronic stress impacts social cognitive processing.
Identifiants
pubmed: 36388137
doi: 10.1016/j.bbih.2022.100540
pii: S2666-3546(22)00130-2
pmc: PMC9640308
doi:
Types de publication
Journal Article
Langues
eng
Pagination
100540Informations de copyright
© 2022 The Authors.
Déclaration de conflit d'intérêts
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper
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