Frontiers in Behavioral Neuroscience (May 2020)

The MAOA Gene Influences the Neural Response to Psychosocial Stress in the Human Brain

  • Xiaoqiang Sun,
  • Xiaoqiang Sun,
  • Xiaoqiang Sun,
  • Qingsen Ming,
  • Qingsen Ming,
  • Xue Zhong,
  • Xue Zhong,
  • Xue Zhong,
  • Daifeng Dong,
  • Daifeng Dong,
  • Daifeng Dong,
  • Chuting Li,
  • Chuting Li,
  • Chuting Li,
  • Ge Xiong,
  • Ge Xiong,
  • Ge Xiong,
  • Chang Cheng,
  • Chang Cheng,
  • Chang Cheng,
  • Wanyi Cao,
  • Wanyi Cao,
  • Wanyi Cao,
  • Jiayue He,
  • Jiayue He,
  • Jiayue He,
  • Xiang Wang,
  • Xiang Wang,
  • Xiang Wang,
  • Jinyao Yi,
  • Jinyao Yi,
  • Jinyao Yi,
  • Shuqiao Yao,
  • Shuqiao Yao,
  • Shuqiao Yao

DOI
https://doi.org/10.3389/fnbeh.2020.00065
Journal volume & issue
Vol. 14

Abstract

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The stress response is regulated by many mechanisms. Monoamine oxidase A (MAOA) has been related to many mental illnesses. However, few studies have explored the relationship between MAOA and acute laboratory-induced psychosocial stress with functional magnetic resonance imaging (fMRI). In the current study, the Montreal Imaging Stress Task (MIST) and fMRI were used to investigate how MAOA influences the stress response. Increased cortisol concentrations were observed after the task; functional connectivity between the bilateral anterior hippocampus and other brain regions was reduced during stress. MAOA-H allele carriers showed greater deactivation of the right anterior hippocampus and greater cortisol response after stress than did MAOH-L allele carriers. Hippocampal deactivation may lead to disinhibition of the hypothalamic-pituitary-adrenal (HPA) axis and the initiation of stress hormone release under stress. Our results suggest that the MAOA gene regulates the stress response by influencing the right anterior hippocampus.

Keywords