Positive symptoms associate with cortical thinning in the superior temporal gyrus via the ENIGMA Schizophrenia consortium

E. Walton, D. P. Hibar, Karolinska Schizophrenia Project Consortium (KaSP), T. G.M. van Erp, S. G. Potkin, R. Roiz-Santiañez, B. Crespo-Facorro, P. Suarez-Pinilla, N. E.M. Van Haren, S. M.C. de Zwarte, R. S. Kahn, W. Cahn, N. T. Doan, Stefan Ehrlich, L. Farde

Research output: Contribution to journalArticleAcademicpeer-review

53 Citations (Scopus)

Abstract

Objective: Based on the role of the superior temporal gyrus (STG) in auditory processing, language comprehension and self-monitoring, this study aimed to investigate the relationship between STG cortical thickness and positive symptom severity in schizophrenia. Method: This prospective meta-analysis includes data from 1987 individuals with schizophrenia collected at seventeen centres around the world that contribute to the ENIGMA Schizophrenia Working Group. STG thickness measures were extracted from T1-weighted brain scans using FreeSurfer. The study performed a meta-analysis of effect sizes across sites generated by a model predicting left or right STG thickness with a positive symptom severity score (harmonized SAPS or PANSS-positive scores), while controlling for age, sex and site. Secondary models investigated relationships between antipsychotic medication, duration of illness, overall illness severity, handedness and STG thickness. Results: Positive symptom severity was negatively related to STG thickness in both hemispheres (left: βstd = −0.052; P = 0.021; right: βstd = −0.073; P = 0.001) when statistically controlling for age, sex and site. This effect remained stable in models including duration of illness, antipsychotic medication or handedness. Conclusion: Our findings further underline the important role of the STG in hallmark symptoms in schizophrenia. These findings can assist in advancing insight into symptom-relevant pathophysiological mechanisms in schizophrenia.

Original languageEnglish
Pages (from-to)439-447
Number of pages9
JournalActa Psychiatrica Scandinavica
Volume135
Issue number5
DOIs
Publication statusPublished - 1 May 2017
Externally publishedYes

Bibliographical note

Funding Information:
ENIGMA was supported in part by a Consortium grant (U54 EB020403 to PMT) from the NIH Institutes contributing to the Big Data to Knowledge (BD2K) Initiative, including the NIBIB and NIMH. The authors would also like to express their gratitude for the personal support from the Deutsche Forschungsgemeinschaft (Research Fellowship to EW; Wa 3635/1-1). For additional support, see Section S3.

Publisher Copyright:
© 2017 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd

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