Long-term effects of childhood trauma subtypes on adult brain function

The associations of social health, self-injurious thoughts and behaviors with or without childhood trauma: A UK biobank study

BACKGROUND

Childhood trauma was known to increase risks of social isolation, loneliness and self-injurious thoughts and behaviors in adulthood. The aim of this study was to examine the protect and risk factors of social health, self-injurious thoughts and behaviors between adults with or without childhood trauma.

METHOD

This was a cross-sectional study comprising of 145,043 participants enrolled in the UK Biobank. Childhood trauma was determined by the Childhood Trauma Screener. Social health included social isolation, loneliness and emotional support. Outcomes of self-injurious thoughts and behaviors included suicide ideation, suicide attempt and non-suicidal self-injury (NSSI). Demographic data, self-reported morbidities and other confounding variables were covariates. Stata 17.0 and SPSS 27.0 was used to analysis data.

RESULTS

Compared with participants without childhood trauma, there was no protective effect of emotional support for NSSI in participants with childhood trauma (β-value difference = 0.334, p = 0.008). The risk effect of loneliness for suicide ideation, suicide attempt and NSSI were also weaker in participants experiencing childhood trauma (p<0.05). Social isolation was no longer a risk factor for NSSI in all participants, while loneliness remained as a threat (p < 0.05).

LIMITATIONS

Many variables were measured using core items of the scale in UK Biobank, meanwhile, the childhood trauma data collected in adulthood may have recall bias.

CONCLUSIONS

Adults reported childhood trauma were less vulnerable to self-injurious thoughts and behaviors when experiencing loneliness, but they could also not be protected from NSSI through emotional support. Emotional dysregulation caused by childhood trauma may contribute to this.

Repetitive Transcranial Magnetic Stimulation Reversing Abnormal Brain Function in Mood Disorders with Early Life Stress: from preclinical models to clinical applications

BACKGROUND

Early life stress (ELS) significantly increases the risk of mood disorders and affects the neurodevelopment of the primary cortex.

HYPOTHESIS

Modulating the primary cortex through neural intervention can ameliorate the impact of ELS on brain development and consequently alleviate its effects on mood disorders.

METHOD

We induced the chronic unpredictable mild stress (CUMS) model in adolescent rats, followed by applying repetitive transcranial magnetic stimulation (rTMS) to their primary cortex in early adulthood. To assess the applicability of primary cortex rTMS in humans, we recruited individuals aged 17-25 with mood disorders who had experienced ELS and performed primary cortex rTMS on them. Functional magnetic resonance imaging (fMRI) and depression-related behavioral and clinical symptoms were conducted in both rats and human subjects before and after the rTMS.

RESULTS

In animals, fMRI analysis revealed increased activation in the primary cortex of CUMS rats and decrease subcortical activation. Following the intervention of primary cortex rTMS, the abnormal functional activity was reversed. Similarly, in mood disorders patients with ELS, increased activation in the primary cortex and decreased activation in the frontal cortex were observed. During rTMS intervention, similar neuroimaging improvements were noted, particularly decreased activation in the primary cortex. This suggests that targeted rTMS in the primary cortex can reverse the abnormal neuroimaging.

CONCLUSION

This cross-species translational study has identified the primary cortex as a key region in mood disorders patients with ELS. Targeting the primary cortex with rTMS can correct abnormal functional activity while improving symptoms. Our study provides translational evidence for therapeutics targeting the ELS factor of mood disorders patients.

Alterations in the white matter structure of major depressive disorder patients and their link to childhood trauma

Objectives

Major Depressive Disorder (MDD) is significantly influenced by childhood trauma (CT), affecting brain anatomy and functionality. Despite the unique disease trajectory in MDD patients with CT, the underlying neurobiological mechanisms remain unclear. Our objective is to investigate CT's impact on the white matter structure of the brain in patients with MDD.

Methods

This research employed tract-based spatial statistics (TBSS) to detect variations between groups in Fractional Anisotropy (FA) throughout the whole brain in 71 medication-free MDD patients and 97 HCs. Participants filled out the Childhood Trauma Questionnaire (CTQ) and assessments for depression and anxiety symptoms. The relationship between FA and CTQ scores was explored with partial correlation analysis, adjusting for factors such as age, gender, educational background, and length of illness.

Results

Compared to HCs, the MDD group showed decreased FA values in the right posterior limb of the internal capsule (PLIC), the inferior fronto-occipital fasciculus (IFOF), and bilateral superior longitudinal fasciculus (SLF). Simple effects analysis revealed that compared to HC-CT, the MDD-CT group demonstrated decreased FA values in right PLIC, IFOF, and bilateral SLF. The MDD-nCT group showed decreased FA values in right PLIC and IFOF compared to HC-nCT. The total scores and subscale scores of CTQ were negatively correlated with the FA in the right SLF.

Conclusion

The right SLF may potentially be influenced by CT during the brain development of individuals with MDD. These results enhance our knowledge of the role of the SLF in the pathophysiology of MDD and the neurobiological mechanisms by which CT influences MDD.

Effect of Adverse Childhood Experiences, Parenting Styles, and Family Accommodation on Patients Diagnosed with Obsessive-Compulsive Disorder

Background

Obsessive-compulsive disorder (OCD) is a mental illness that has multiple biological, psychological, and sociological factors. The aim of this study was to investigate childhood traumatic experiences, parenting style, and family adaptive behaviors in patients with OCD, to explore the psychosocial factors that affect its occurrence, and to analyze the correlation between these psychosocial factors and OCD symptoms to better understand its etiology.

Methods

We recruited 109 patients diagnosed with OCD (patient group) and 144 healthy controls (control group) into this study. The Obsessive-Compulsive Inventory-Revised (OCI-R), Childhood Trauma Questionnaire-Short Form (CTQ-SF), Egna Minnen Betraffande Uppfostran (EMBU), and Family Accommodation Scale-Patient Version (FAS-PV) questionnaires were administered to all participants.

Results

Patient OCI-R scores for checking, hoarding, obsessing, ordering, washing, neutralizing, and total OCI-R scores were significantly higher when compared with the control group (all P < .05). Patient CTQ scores for emotional abuse, physical abuse, sexual abuse, emotional neglect, physical neglect, and total CTQ scores were significantly higher when compared with the control group (all P < .05). Patients' EMBU scores for F1, F2, F3, F5, F6, M1, M2, M3, M4, M5, and total EMBU scores were significantly higher when compared with the control group (all P < .05). There was no significant difference in the F4 scores between the 2 groups (P = .622). Patient FAS-PV scores for the direct participation and facilitation of OCD symptoms, avoidance of OCD triggers, taking on patient responsibilities, modification of personal responsibilities, and total FAS-PV scores were significantly higher when compared with the control group (all P < .05). The total OCI-R score showed a significant positive correlation with emotional abuse, physical abuse, sexual abuse, physical neglect, and total CTQ score (r = 0.564; r = 0.518; r = 0.542; r = 0.586; r = 0.603, all P < .05). The total OCI-R score showed a significant positive correlation with the scores for F1, F2, F3, F5, F6, M1, M2, M3, M4, M5, and the total EMBU score (r = 0.504; r = 0.531; r = 0.611; r = 0.466; r = 0.519; r = 0.665; r = 0.351; r = 0.597; r = 0.667; r = 0.484; r = 0.586; r = 0.662, all P < .05). The total OCI-R score showed a significant positive correlation with scores for direct participation and facilitation, avoidance of OCD triggers, taking on patient responsibilities, modification of personal responsibilities, and total FAS-PV score (r = 0.571; r = 0.624; r = 0.670; r = 0.592; r = 0.684, all P < .05).

Conclusion

Our findings highlight the importance of adverse childhood experiences, parenting styles, and family accommodation on OCD patients. Importantly, these adverse experiences are closely related to the severity of symptoms in these patients. We suggest that psychological, and not only physiological, changes play a crucial role in the occurrence and development of OCD. This study confirmed that family and childhood experiences play an important role in the occurrence of OCD, and family education in childhood greatly affects the occurrence of OCD. Therefore, it can be inferred that good family psychological education in childhood has a positive effect on reducing the risk of OCD. If family psychological education can be included in community medical services, this will help to mitigate the development of mental health situations.