Journal
FRONTIERS IN PSYCHIATRY
Volume 12, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fpsyt.2021.567976
Keywords
youth suicide; depression; functional magnetic resonance imaging; impulsivity; resting-state functional connectivity
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Funding
- Medicine Scientific Research Fund for Youth from Chongqing Health and Family Planning Committee [2018QNXM014]
- Natural Science Fund from Chongqing Science and Technology Commission [cstc2018jcyjAX0164]
- Scientific Research and Cultivation Project of the First Affiliated Hospital of Chongqing Medical University [PYJJ2018-20]
- National Natural Science Foundation of China [81671360]
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Our study found significantly different resting-state functional connectivity patterns in depressed youth with suicide attempts, non-suicide attempters, and healthy controls. Connectivity between the prefrontal-parietal regions was linked to suicidal ideation and impulsivity, while connectivity between the prefrontal cortex and rACC was only associated with impulsivity levels, not suicidal ideation.
Suicide is a leading cause of death among youth and is strongly associated with major depressive disorder (MDD). However, the neurobiological underpinnings of suicidal behaviour and the identification of risk for suicide in young depressed patients are not yet well-understood. In this study, we used a seed-based correlation analysis to investigate the differences in resting-state functional connectivity (RSFC) in depressed youth with or without a history of suicide attempts and healthy controls (HCs). Suicidal attempters (ATT group, n = 35), non-suicide attempters (NAT group, n = 18), and HCs exhibited significantly different RSFC patterns with the left superior prefrontal gyrus (L-SFG) and left middle prefrontal gyrus (L-MFG) serving as the regions of interest (ROIs). The ATT group showed decreased RSFC of the left middle frontal gyrus with the left superior parietal gyrus compared to the NAT and HC groups. Decreased RSFC between the left superior frontal gyrus and the right anterior cingulate cortex (rACC) was found in the ATT group compared to the NAT and HC groups. Furthermore, the left prefrontal-parietal connectivity was associated with suicidal ideation and levels of impulsivity, but RSFC of the left prefrontal cortex with the rACC was correlated exclusively with impulsivity levels and was not related to suicidal ideation in the ATT group. Our results demonstrated that altered RSFC of the prefrontal-parietal and prefrontal-rACC regions was associated with suicide attempts in depressed youth, and state-related deficits in their interconnectivity may contribute to traits, such as cognitive impairments and impulsivity to facilitate suicidal acts. Our findings suggest that the neural correlates of suicidal behaviours might be dissociable from those related to the severity of current suicidal ideation. Neural circuits underlying suicide attempts differ from those that underlie suicidal ideation.
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