Cited by 77Schizophrenia research and treatmentNeural dynamics and brain functionFunctional Brain Connectivity Studies

Impaired prefrontal synaptic gain in people with psychosis and their relatives during the mismatch negativity

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Ranlund, Siri, Adams, Rick A., Díez, Álvaro, Constante, Miguel, Dutt, Anirban, Hall, Mei‐Hua, Maestro Carbayo, Amparo, McDonald, Colm +7 more·2016·Human Brain Mapping

Abstract

The mismatch negativity (MMN) evoked potential, a preattentive brain response to a discriminable change in auditory stimulation, is significantly reduced in psychosis. Glutamatergic theories of psychosis propose that hypofunction of NMDA receptors (on pyramidal cells and inhibitory interneurons) causes a loss of synaptic gain control. We measured changes in neuronal effective connectivity underlying the MMN using dynamic causal modeling (DCM), where the gain (excitability) of superficial pyramidal cells is explicitly parameterised. EEG data were obtained during a MMN task--for 24 patients with psychosis, 25 of their first-degree unaffected relatives, and 35 controls--and DCM was used to estimate the excitability (modeled as self-inhibition) of (source-specific) superficial pyramidal populations. The MMN sources, based on previous research, included primary and secondary auditory cortices, and the right inferior frontal gyrus. Both patients with psychosis and unaffected relatives (to a lesser degree) showed increased excitability in right inferior frontal gyrus across task conditions, compared to controls. Furthermore, in the same region, both patients and their relatives showed a reversal of the normal response to deviant stimuli; that is, a decrease in excitability in comparison to standard conditions. Our results suggest that psychosis and genetic risk for the illness are associated with both context-dependent (condition-specific) and context-independent abnormalities of the excitability of superficial pyramidal cell populations in the MMN paradigm. These abnormalities could relate to NMDA receptor hypofunction on both pyramidal cells and inhibitory interneurons, and appear to be linked to the genetic aetiology of the illness, thereby constituting potential endophenotypes for psychosis.

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  1. NICE (2014): Psychosis and schizophrenia in adults: Treatment and management. NICE clinical guideline 178. London: National Institute for Health and Care Excellence. 25340235

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Authors
Ranlund, S., Adams, R. A., Díez, Á., Constante, M., Dutt, A., Hall, M., Maestro Carbayo, A., McDonald, C., Petrella, S., Schulze, K., Shaikh, M., Walshe, M., Friston, K., Pinotsis, D., & Bramon, E.
Affiliations
  • University College London (GB)
  • Department of PsychiatryHospital Beatriz AngeloLisbon Portugal
  • King's College London (GB)
  • Harvard University (US)
  • The South London and Maudsley NHS Foundation TrustNIHR Biomedical Research Centre for Mental Health at the Institute of Psychiatry, Psychology and Neuroscience, King's College London United Kingdom
  • Ollscoil na Gaillimhe – University of Galway (IE)
  • University of Foggia (IT)
  • South London and Maudsley NHS Foundation Trust (GB)
  • Wellcome Centre for Human Neuroimaging (GB)
Corresponding author
Ranlund, Siri
Venue
Human Brain Mapping
Publisher
Wiley
Published
2015-10-27
Volume
37
Issue
1
Pages
351-365
ISSN
  • 1065-9471 (ISSN-L)
  • 1097-0193
OpenAlex
W2346160145
Cited by
77
References
132
Citations by year
2026: 6 · 2025: 5 · 2024: 7 · 2023: 7 · 2022: 7 · 2021: 8 · 2020: 12 · 2019: 4 · 2018: 8 · 2017: 8 · 2016: 5
FWCI
5.69
Type
journal article
Language
en
Open access
Locations
  • Human Brain Mapping (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • ARAN (University of Galway Research Repository) (Ollscoil na Gaillimhe – University of Galway) (acceptedVersion, cc-by-nc-nd)
  • City Research Online (City University London) (acceptedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
  • Arrow@dit (Dublin Institute of Technology) (submittedVersion)
  • ARAN (University of Galway Research Repository) (Ollscoil na Gaillimhe – University of Galway) (submittedVersion, cc-by-nc-nd)
  • UCL Discovery (University College London) (submittedVersion)
  • University of Galway Research Repository (submittedVersion, cc-by-nc)
  • UVaDOC UVaDOC University of Valladolid Documentary Repository (University of Valladolid) (submittedVersion, other-oa)
  • Research Repository UCD (University College Dublin) (cc-by-nc)
Funders
National Institute for Health Research, UK (PDA/02/06/016)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
Keywords
psychosis, mismatch negativity, NMDA receptor hypofunction, pyramidal neurons, inhibitory interneurons, dynamic causal modeling, first-degree relatives, genetic risk, endophenotypes, inferior frontal gyrus, auditory cortex
MeSH terms
Acoustic Stimulation, Adolescent, Adult, Brain Injuries, Contingent Negative Variation, Electroencephalography, Evoked Potentials, Auditory, Family, Female, Humans, Male, Middle Aged, Models, Theoretical, Psychotic Disorders, Prefrontal Cortex, Nonlinear Dynamics, Young Adult

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