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Association Between Genetic Risk for Type 2 Diabetes and Structural Brain Connectivity in Major Depressive Disorder.

Authors
  • Repple, Jonathan1
  • König, Amelie2
  • de Lange, Siemon C3
  • Opel, Nils2
  • Redlich, Ronny4
  • Meinert, Susanne2
  • Grotegerd, Dominik2
  • Mauritz, Marco2
  • Hahn, Tim2
  • Borgers, Tiana2
  • Leehr, Elisabeth J2
  • Winter, Nils2
  • Goltermann, Janik2
  • Enneking, Verena2
  • Fingas, Stella M2
  • Lemke, Hannah2
  • Waltemate, Lena2
  • Dohm, Katharina2
  • Richter, Maike2
  • Mehler, David M A2
  • And 15 more
  • 1 Department of Psychiatry, University of Muenster, Muenster, Germany. Electronic address: [email protected] , (Germany)
  • 2 Department of Psychiatry, University of Muenster, Muenster, Germany. , (Germany)
  • 3 Department of Complex Trait Genetics, Center for Neurogenomics and Cognitive Research, Vrije Universiteit Amsterdam, Amsterdam Neuroscience, Amsterdam, The Netherlands. , (Netherlands)
  • 4 Department of Psychiatry, University of Muenster, Muenster, Germany; Institute of Psychology, University of Halle, Halle, Germany. , (Germany)
  • 5 Department of Psychiatry and Psychotherapy, University of Marburg, Marburg, Germany. , (Germany)
  • 6 Department of Psychiatry and Psychotherapy, University of Marburg, Marburg, Germany; Department of Psychiatry and Psychotherapy, University of Bonn, Bonn, Germany. , (Germany)
  • 7 South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia; Discipline of Psychiatry, School of Medicine, University of Adelaide, Adelaide, South Australia, Australia. , (Australia)
  • 8 Department of Psychiatry, University of Muenster, Muenster, Germany; Department of Psychiatry, Melbourne Medical School, The University of Melbourne, Melbourne, Victoria, Australia; The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Melbourne, Victoria, Australia. , (Australia)
  • 9 Department of Complex Trait Genetics, Center for Neurogenomics and Cognitive Research, Vrije Universiteit Amsterdam, Amsterdam Neuroscience, Amsterdam, The Netherlands; Department of Child Psychiatry, Amsterdam University Medical Center, Amsterdam Neuroscience, Amsterdam, The Netherlands. , (Netherlands)
Type
Published Article
Journal
Biological psychiatry. Cognitive neuroscience and neuroimaging
Publication Date
Mar 01, 2022
Volume
7
Issue
3
Pages
333–340
Identifiers
DOI: 10.1016/j.bpsc.2021.02.010
PMID: 33684623
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Major depressive disorder (MDD) and type 2 diabetes mellitus (T2D) are known to share clinical comorbidity and to have genetic overlap. Besides their shared genetics, both diseases seem to be associated with alterations in brain structural connectivity and impaired cognitive performance, but little is known about the mechanisms by which genetic risk of T2D might affect brain structure and function and if they do, how these effects could contribute to the disease course of MDD. This study explores the association of polygenic risk for T2D with structural brain connectome topology and cognitive performance in 434 nondiabetic patients with MDD and 539 healthy control subjects. Polygenic risk score for T2D across MDD patients and healthy control subjects was found to be associated with reduced global fractional anisotropy, a marker of white matter microstructure, an effect found to be predominantly present in MDD-related fronto-temporo-parietal connections. A mediation analysis further suggests that this fractional anisotropy variation may mediate the association between polygenic risk score and cognitive performance. Our findings provide preliminary evidence of a polygenic risk for T2D to be linked to brain structural connectivity and cognition in patients with MDD and healthy control subjects, even in the absence of a direct T2D diagnosis. This suggests an effect of T2D genetic risk on white matter integrity, which may mediate an association of genetic risk for diabetes and cognitive impairments. Copyright © 2021 Society of Biological Psychiatry. Published by Elsevier Inc. All rights reserved.

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