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Related Experiment Video

Updated: Oct 10, 2025

The Forced Swim Test as a Model of Depressive-like Behavior
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Gene × environment interaction in major depressive disorder.

Ming-Zhe Zhao1, Xu-Sheng Song2, Jing-Song Ma3

  • 1Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, China.

World Journal of Clinical Cases
|December 8, 2021
PubMed
Summary

Major depressive disorder (MDD) involves gene-environment interactions (G×E). Research is shifting towards genome-wide studies, considering childhood adversity and life stress, and exploring differential susceptibility theories for MDD.

Keywords:
Childhood adversitiesDiathesis-Stress modelDifferential susceptibility TheoryGene × environment interactionMajor depressive disorderStressful life events

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Area of Science:

  • Psychiatric Genetics
  • Molecular Psychiatry
  • Behavioral Genetics

Background:

  • Major Depressive Disorder (MDD) is a complex, multifactorial mental health condition.
  • Genetic predisposition and environmental factors significantly contribute to MDD development.
  • Gene × Environment Interaction (G×E) models are crucial for understanding MDD's etiology.

Purpose of the Study:

  • To review the evolution of Gene × Environment Interaction (G×E) studies in Major Depressive Disorder (MDD).
  • To examine the impact of environmental factors like childhood adversities and stressful life events on MDD.
  • To discuss theoretical shifts from diathesis-stress to differential susceptibility models in G×E research.

Main Methods:

  • Systematic review of Gene × Environment Interaction (G×E) studies in Major Depressive Disorder (MDD).
  • Analysis of research methodologies, transitioning from candidate gene to genome-wide association studies (GWAS).
  • Evaluation of environmental risk factors and their interplay with genetic vulnerabilities.

Main Results:

  • Evidence supports the significant role of childhood adversities and stressful life events in MDD.
  • Genome-wide approaches offer a broader perspective on G×E compared to candidate gene studies.
  • The differential susceptibility theory provides an alternative framework to the traditional diathesis-stress model for G×E.

Conclusions:

  • G×E studies are essential for elucidating the complex etiology of Major Depressive Disorder (MDD).
  • Future research should focus on advanced methodologies to unravel intricate gene-environment interactions.
  • Understanding these interactions is key to developing targeted prevention and treatment strategies for MDD.