Modelling gene-environment interaction in first episodes of psychosis - PubMed (original) (raw)

Multicenter Study

doi: 10.1016/j.schres.2017.01.058. Epub 2017 Feb 5.

Miquel Bioque 2, Bibiana Cabrera 2, Antonio Lobo 3, Ana González-Pinto 4, Laura Pina 5, Iluminada Corripio 6, Julio Sanjuán 7, Anna Mané 8, Josefina Castro-Fornieles 9, Eduard Vieta 10, Celso Arango 5, Gisela Mezquida 2, Patricia Gassó 11, Mara Parellada 5, Jerónimo Saiz-Ruiz 12, Manuel J Cuesta 13, Sergi Mas 11; PEPs GROUP

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Multicenter Study

Modelling gene-environment interaction in first episodes of psychosis

Miguel Bernardo et al. Schizophr Res. 2017 Nov.

Abstract

Introduction: Recent research demonstrates the heterogeneous etiology of psychotic disorders, where gen-environment (GxE) interaction plays a key role. Large genetic studies have linked many genetic variants with schizophrenia, but each variant is only associated with a small effect and the GxE interaction contribution has not been evaluated.

Methods: The PEPs Project was designed to carefully collect a large amount of genetic and environmental exposure data of 335 FEP patients and 253 matched healthy controls.780single-nucleotide polymorphisms (from 159 candidate genes)and 16 environmental variables previously reported as the main psychosis non-genetic risk factors were analyzed together using entropy-based measures of information gain.

Results: Our analyses identified an interaction between nine SNPs and the exposition to the environmental risk factors of psychosis, showing a clear enrichment of genes linked to serotonin neurotransmission and neurodevelopmental processes.

Conclusions: This study has allowed the identification of several GxE-environment interactions involved in the risk of presenting a FEP. Our results highlight the importance of serotonin neurotransmission interacting with certain environmental stimuli. The serotoninergic system may be playing a key role in the regulatory network of stress and other systems implicated in the emergence and development of psychotic disorders.

Keywords: First episodes psychosis; Gene-environment interaction; Predictive model; Schizophrenia.

Copyright © 2017 Elsevier B.V. All rights reserved.

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