Smaller putamen volumes are associated with greater problems in external emotional regulation in depressed adolescents with nonsuicidal self-injury

Correlation Between Family Dysfunction and Nonsuicidal Self-Injury in a Sample of Chinese Adolescents: The Mediating Effect of Alexithymia and circRNA_103636

Background

Adolescent group may be prone to a variety of behavioral disorders, one of which is nonsuicidal self-injury (NSSI), NSSI intervention is limited for its unknown mechanism, so this study aimed to explore the factors associated with and pathological mechanism underlying NSSI from the perspective of family dysfunction, alexithymia, circRNA_103636 in a sample of Chinese adolescents.

Methods

A total of 200 MDD adolescents with NSSI and 200 healthy controls were enrolled via a convenient sampling method in clinical settings. The Family APGAR Index (APGAR), Toronto Alexithymia Scale (TAS-20), and Adolescent Nonsuicidal Self-injury Assessment Questionnaire (ANSSIAQ) were used for mental assessment of the study group and control group participants. Real-time quantitative reverse transcription PCR (qRT-PCR) was utilized to detect circRNA_103636 expression in peripheral blood mononuclear cells (PBMCs).

Results

There were significant between-group differences of 134 patients (67%) in the study group and 42 patients in the control group (21%) with moderate or severe family dysfunction (P<0.01). The APGAR score was lower, and the difficulty identifying feeling (DIF), difficulty describing feeling (DDF) and externally oriented thinking (EOT) scores of the TAS-20 and ΔCt value of circRNA_103636 were greater in the study group than in the control group. NSSI behavior and NSSI function were negatively correlated with the APGAR score and positively correlated with DIF, DDF, and the EOT of TAS-20 and the ΔCt value of circRNA_103636. Multiple regression analysis confirmed that EOT, circRNA_103636 expression, and APGAR were predictors of ANSSIAQ, which could explain 40.5% of the variance. Similarly, the alexithymia and circRNA_103636 expression mediated the correlation between family dysfunction and NSSI in the study group, and these mediating effects accounted for 27.25% and 23.33%, respectively, of the total effect. Taken together, family dysfunction, alexithymia, and circRNA_103636 expression have predictive effects on NSSI and alexithymia, circRNA_103636 expressions are mediators between family dysfunction and NSSI in Chinese adolescent.

Conclusion

Here, we established a new model for NSSI in which exposure to family dysfunction could induce pathological process by modulating personality traits and epigenetic regulators.

Cortical morphological alterations in adolescents with major depression and non-suicidal self-injury

BACKGROUND

Non-suicidal self-injury (NSSI) involves repetitive self-harm without suicidal intent and is common among adolescents, often linked to major depressive disorder (MDD). NSSI can lead to physical harm, cognitive impairments, interpersonal issues, violent behavior, and increased risks of psychological disorders and suicide attempts later in life.

METHODS

Voxel-based morphometry (VBM) and surface-based morphometry (SBM) were performed on 44 NSSI patients and 44 healthy controls (HCs). Differences in GMV, CT, and cortical complexity were compared using the two-sample t-tests and correlated with neuropsychological scales.

RESULTS

NSSI patients exhibited significant GMV atrophy in multiple regions, including the left insula, left anterior cingulate cortex, left putamen, left middle frontal gyrus, and right superior frontal gyrus showing increased GMV in the cerebellum posterior lobe. NSSI patients had increased CT in multiple left hemisphere regions and decreased CT in the right middle frontal gyrus. Additionally, they exhibited reduced cortical complexity, including decreased SD in the right frontal gyrus, and lower GI in the left insula. There were no significant differences between the two groups in terms of fractal dimension (FD). NSSI patients showed negative correlation between the CT of the right middle frontal gyrus and the anger dimension of the BPAQ, as well as the SD of the right superior frontal gyrus and the hostility dimension of the BPAQ.

CONCLUSION

NSSI patients have significant structural changes in the insular cortex, prefrontal cortex, precentral and postcentral gyrus, temporal lobe, putamen, and anterior cingulate cortex, offering a morphological perspective on the pathophysiology of NSSI in MDD.

Abnormal global and local connectivity in patients with anti-N-methyl-D-aspartate receptor encephalitis: A resting-state functional MRI study

OBJECTIVE

We decided to investigate the changes of global and local connectivity in anti-N-methyl-D-aspartate receptor (anti-NMDAR) encephalitis patients based on eigenvector centrality (EC) and regional homogeneity (ReHo). We sought new biomarkers to identify the patients based on multivariate pattern analysis (MVPA).

METHODS

Functional MRI (fMRI) was performed on all participants. EC, ReHo and MVPA were used to analyze the fMRI images. The correlation between the global or local connectivity and neuropsychology tests was detected.

RESULTS

The MoCA scores of the patients were lower than those of the healthy controls (HCs), while the HAMD24 and HAMA scores of the patients were higher than those of the HCs. Increased EC values in the right calcarine (CAL.R) and decreased EC values in the right putamen (PUT.R) distinguished these subjects with anti-NMDAR encephalitis from HCs. The higher ReHo values in the left postcentral gyrus (PoCG.L) were detected in the patients. The correlation analysis showed that the EC values in the PUT.R were negatively correlated with HAMD24 and HAMA scores, while the ReHo values in the PoCG.L were negatively correlated with MoCA scores. Better classification performance was reached in the EC-based classifier (AUC = 0.80), while weaker classification performance was achieved in the ReHo-based classifier (AUC = 0.74) or the classifier based on EC and ReHo (AUC = 0.74). The brain areas with large weights were located in the frontal lobe, parietal lobe, cerebellum and basal ganglia.

CONCLUSION

Our findings suggest that abnormal global and local connectivity may play an important part in the pathophysiological mechanism of neuropsychiatric symptoms in the anti-NMDAR encephalitis patients. The EC-based classifier may be better than the ReHo-based classifier in identifying anti-NMDAR encephalitis patients.

Neurometabolic and Brain Functional Alterations Associated with Cognitive Impairment in Patients with Myasthenia Gravis: A Combined 1H-MRS and fMRI Study

Whether patients with myasthenia gravis (MG) exhibit cognitive impairment is controversial. Also the underlying mechanisms are unknown. We aimed to investigate alterations in cognitive function, neurometabolite levels, and brain function in patients with MG and to explore the associations between abnormal regional brain functional activity, neurometabolite concentrations in the MPFC and left thalamus, and cognitive activity in patients with MG. Neuropsychological tests, proton magnetic resonance spectroscopy, and resting-state functional magnetic resonance imaging were performed on 41 patients with MG and 45 race-, sex-, age-, and education-matched healthy controls (HCs). The results suggest that MG is accompanied by cognitive decline, as indicated by global cognitive function, visual-spatial function, language, memory, abnormalities in regional brain functional activity, and neurometabolite alterations (including GABA, NAA, and Cho) in the medial prefrontal cortex (MPFC) and left thalamus. Cognitive impairment in patients with MG may be related to abnormal regional brain functional activity and changes in neurometabolites, and regional brain functional activity may be modulated by specific neurometabolites.