Objective: The coronavirus disease-2019 (COVID-19) pandemic’s social isolation has significantly impacted mental health, increasing depression and anxiety. This study explores the effects of social isolation on both humans and mice, focusing on behavioral changes and hippocampal protein expression. It also investigates genetic alterations through single-cell RNA and whole-genome sequencing (WGS). Methods: Here we conducted behavioral studies, protein expression studies, single-nucleus sequencing (snRNAseq), and WGS of the hippocampus of mice that underwent early maternal separation and social isolation, and a demographic study of community populations who had been self-quarantined owing to COVID-19 exposure to investigate the link between somatic mutations and stress due to social isolation. Results: The demographic study demonstrated more negative mental health findings among individuals who live alone or are single. Mice subjected to early maternal separation and social isolation demonstrated increased anxiety-like behaviors and stress-related corticotropin-releasing hormone receptor 1, and neurogenesis-related sex-determining region Y-box 2 and doublecortin expression. In snRNA-seq, differences, such as transthyretin increase, were observed in the maternal separation group, and somatic mutations, including insertion in the intron site of Tmem267, were observed in the social isolation group on WGS. Conclusion The results of this study suggest that stress, such as social isolation, can cause changes at the genetic level, as well as behavioral and brain protein changes.

Objectives: We investigate relationship between suicide attempts and peripheral blood inflammatory markers in patients visiting the emergency department (ED) for psychiatric consultations, aiming to identify potential biomarkers for predicting suicide risk. Methods: We retrospectively reviewed medical records of 569 patients who were referred to psychiatric consultation at the ED from January 1, 2022 to December 31, 2022. Demographic and clinical characteristics and various blood test markers were analyzed. Analyses were performed to compare differences in blood markers between suicide attempters and non-attempters and among those with varying histories of suicide attempts. Results: Among 569 patients, 398 (69.9%) had attempted suicide. Significant differences in leukocytes, lymphocytes, eosinophils, red blood cells (RBCs), lactate dehydrogenase (LDH), and ketone bodies were observed between suicide attempters and non-attempters. Further analysis revealed that patients with a history of suicide attempts had higher lymphocyte and eosinophil counts but lower LDH and ketone body levels. An increasing frequency of past suicide attempts correlated with higher lymphocyte and eosinophil count and lower neutrophil-to-lymphocyte ratio, monocyte-to-lymphocyte ratio, platelet-to-lymphocyte ratio, systemic immune inflammatory index, glucose, LDH, and ketone body levels. Conclusions We identify blood markers associated with suicide attempts, indicating that leukocyte, lymphocyte, eosinophil, RBC count, LDH, and ketone body levels could serve as potential biomarkers for assessing suicide risk. Findings underscore importance of biological assessments in conjunction with psychological evaluations in predicting and preventing suicide attempts. Further research is needed to validate these biomarkers and understand mechanisms.

Objective: The coronavirus disease-2019 (COVID-19) pandemic’s social isolation has significantly impacted mental health, increasing depression and anxiety. This study explores the effects of social isolation on both humans and mice, focusing on behavioral changes and hippocampal protein expression. It also investigates genetic alterations through single-cell RNA and whole-genome sequencing (WGS). Methods: Here we conducted behavioral studies, protein expression studies, single-nucleus sequencing (snRNAseq), and WGS of the hippocampus of mice that underwent early maternal separation and social isolation, and a demographic study of community populations who had been self-quarantined owing to COVID-19 exposure to investigate the link between somatic mutations and stress due to social isolation. Results: The demographic study demonstrated more negative mental health findings among individuals who live alone or are single. Mice subjected to early maternal separation and social isolation demonstrated increased anxiety-like behaviors and stress-related corticotropin-releasing hormone receptor 1, and neurogenesis-related sex-determining region Y-box 2 and doublecortin expression. In snRNA-seq, differences, such as transthyretin increase, were observed in the maternal separation group, and somatic mutations, including insertion in the intron site of Tmem267, were observed in the social isolation group on WGS. Conclusion The results of this study suggest that stress, such as social isolation, can cause changes at the genetic level, as well as behavioral and brain protein changes.

Objective: The coronavirus disease-2019 (COVID-19) pandemic’s social isolation has significantly impacted mental health, increasing depression and anxiety. This study explores the effects of social isolation on both humans and mice, focusing on behavioral changes and hippocampal protein expression. It also investigates genetic alterations through single-cell RNA and whole-genome sequencing (WGS). Methods: Here we conducted behavioral studies, protein expression studies, single-nucleus sequencing (snRNAseq), and WGS of the hippocampus of mice that underwent early maternal separation and social isolation, and a demographic study of community populations who had been self-quarantined owing to COVID-19 exposure to investigate the link between somatic mutations and stress due to social isolation. Results: The demographic study demonstrated more negative mental health findings among individuals who live alone or are single. Mice subjected to early maternal separation and social isolation demonstrated increased anxiety-like behaviors and stress-related corticotropin-releasing hormone receptor 1, and neurogenesis-related sex-determining region Y-box 2 and doublecortin expression. In snRNA-seq, differences, such as transthyretin increase, were observed in the maternal separation group, and somatic mutations, including insertion in the intron site of Tmem267, were observed in the social isolation group on WGS. Conclusion The results of this study suggest that stress, such as social isolation, can cause changes at the genetic level, as well as behavioral and brain protein changes.

Objectives: We investigate relationship between suicide attempts and peripheral blood inflammatory markers in patients visiting the emergency department (ED) for psychiatric consultations, aiming to identify potential biomarkers for predicting suicide risk. Methods: We retrospectively reviewed medical records of 569 patients who were referred to psychiatric consultation at the ED from January 1, 2022 to December 31, 2022. Demographic and clinical characteristics and various blood test markers were analyzed. Analyses were performed to compare differences in blood markers between suicide attempters and non-attempters and among those with varying histories of suicide attempts. Results: Among 569 patients, 398 (69.9%) had attempted suicide. Significant differences in leukocytes, lymphocytes, eosinophils, red blood cells (RBCs), lactate dehydrogenase (LDH), and ketone bodies were observed between suicide attempters and non-attempters. Further analysis revealed that patients with a history of suicide attempts had higher lymphocyte and eosinophil counts but lower LDH and ketone body levels. An increasing frequency of past suicide attempts correlated with higher lymphocyte and eosinophil count and lower neutrophil-to-lymphocyte ratio, monocyte-to-lymphocyte ratio, platelet-to-lymphocyte ratio, systemic immune inflammatory index, glucose, LDH, and ketone body levels. Conclusions We identify blood markers associated with suicide attempts, indicating that leukocyte, lymphocyte, eosinophil, RBC count, LDH, and ketone body levels could serve as potential biomarkers for assessing suicide risk. Findings underscore importance of biological assessments in conjunction with psychological evaluations in predicting and preventing suicide attempts. Further research is needed to validate these biomarkers and understand mechanisms.

Objectives: We investigate relationship between suicide attempts and peripheral blood inflammatory markers in patients visiting the emergency department (ED) for psychiatric consultations, aiming to identify potential biomarkers for predicting suicide risk. Methods: We retrospectively reviewed medical records of 569 patients who were referred to psychiatric consultation at the ED from January 1, 2022 to December 31, 2022. Demographic and clinical characteristics and various blood test markers were analyzed. Analyses were performed to compare differences in blood markers between suicide attempters and non-attempters and among those with varying histories of suicide attempts. Results: Among 569 patients, 398 (69.9%) had attempted suicide. Significant differences in leukocytes, lymphocytes, eosinophils, red blood cells (RBCs), lactate dehydrogenase (LDH), and ketone bodies were observed between suicide attempters and non-attempters. Further analysis revealed that patients with a history of suicide attempts had higher lymphocyte and eosinophil counts but lower LDH and ketone body levels. An increasing frequency of past suicide attempts correlated with higher lymphocyte and eosinophil count and lower neutrophil-to-lymphocyte ratio, monocyte-to-lymphocyte ratio, platelet-to-lymphocyte ratio, systemic immune inflammatory index, glucose, LDH, and ketone body levels. Conclusions We identify blood markers associated with suicide attempts, indicating that leukocyte, lymphocyte, eosinophil, RBC count, LDH, and ketone body levels could serve as potential biomarkers for assessing suicide risk. Findings underscore importance of biological assessments in conjunction with psychological evaluations in predicting and preventing suicide attempts. Further research is needed to validate these biomarkers and understand mechanisms.

Objective: The coronavirus disease-2019 (COVID-19) pandemic’s social isolation has significantly impacted mental health, increasing depression and anxiety. This study explores the effects of social isolation on both humans and mice, focusing on behavioral changes and hippocampal protein expression. It also investigates genetic alterations through single-cell RNA and whole-genome sequencing (WGS). Methods: Here we conducted behavioral studies, protein expression studies, single-nucleus sequencing (snRNAseq), and WGS of the hippocampus of mice that underwent early maternal separation and social isolation, and a demographic study of community populations who had been self-quarantined owing to COVID-19 exposure to investigate the link between somatic mutations and stress due to social isolation. Results: The demographic study demonstrated more negative mental health findings among individuals who live alone or are single. Mice subjected to early maternal separation and social isolation demonstrated increased anxiety-like behaviors and stress-related corticotropin-releasing hormone receptor 1, and neurogenesis-related sex-determining region Y-box 2 and doublecortin expression. In snRNA-seq, differences, such as transthyretin increase, were observed in the maternal separation group, and somatic mutations, including insertion in the intron site of Tmem267, were observed in the social isolation group on WGS. Conclusion The results of this study suggest that stress, such as social isolation, can cause changes at the genetic level, as well as behavioral and brain protein changes.

Objectives: We investigate relationship between suicide attempts and peripheral blood inflammatory markers in patients visiting the emergency department (ED) for psychiatric consultations, aiming to identify potential biomarkers for predicting suicide risk. Methods: We retrospectively reviewed medical records of 569 patients who were referred to psychiatric consultation at the ED from January 1, 2022 to December 31, 2022. Demographic and clinical characteristics and various blood test markers were analyzed. Analyses were performed to compare differences in blood markers between suicide attempters and non-attempters and among those with varying histories of suicide attempts. Results: Among 569 patients, 398 (69.9%) had attempted suicide. Significant differences in leukocytes, lymphocytes, eosinophils, red blood cells (RBCs), lactate dehydrogenase (LDH), and ketone bodies were observed between suicide attempters and non-attempters. Further analysis revealed that patients with a history of suicide attempts had higher lymphocyte and eosinophil counts but lower LDH and ketone body levels. An increasing frequency of past suicide attempts correlated with higher lymphocyte and eosinophil count and lower neutrophil-to-lymphocyte ratio, monocyte-to-lymphocyte ratio, platelet-to-lymphocyte ratio, systemic immune inflammatory index, glucose, LDH, and ketone body levels. Conclusions We identify blood markers associated with suicide attempts, indicating that leukocyte, lymphocyte, eosinophil, RBC count, LDH, and ketone body levels could serve as potential biomarkers for assessing suicide risk. Findings underscore importance of biological assessments in conjunction with psychological evaluations in predicting and preventing suicide attempts. Further research is needed to validate these biomarkers and understand mechanisms.

Objective: The coronavirus disease-2019 (COVID-19) pandemic’s social isolation has significantly impacted mental health, increasing depression and anxiety. This study explores the effects of social isolation on both humans and mice, focusing on behavioral changes and hippocampal protein expression. It also investigates genetic alterations through single-cell RNA and whole-genome sequencing (WGS). Methods: Here we conducted behavioral studies, protein expression studies, single-nucleus sequencing (snRNAseq), and WGS of the hippocampus of mice that underwent early maternal separation and social isolation, and a demographic study of community populations who had been self-quarantined owing to COVID-19 exposure to investigate the link between somatic mutations and stress due to social isolation. Results: The demographic study demonstrated more negative mental health findings among individuals who live alone or are single. Mice subjected to early maternal separation and social isolation demonstrated increased anxiety-like behaviors and stress-related corticotropin-releasing hormone receptor 1, and neurogenesis-related sex-determining region Y-box 2 and doublecortin expression. In snRNA-seq, differences, such as transthyretin increase, were observed in the maternal separation group, and somatic mutations, including insertion in the intron site of Tmem267, were observed in the social isolation group on WGS. Conclusion The results of this study suggest that stress, such as social isolation, can cause changes at the genetic level, as well as behavioral and brain protein changes.

Objectives: Adolescent suicide is a serious national issue in Korea. Recently, life satisfaction has been recognized as a major factor related to this issue. The main purpose of this study was to identify the domains of life satisfaction that affect suicidal behavior in adolescence. Methods: Data were collected from eight middle schools in Incheon, Korea. A total of 1297 students answered questions regarding their demographic characteristics, happiness, self-related life satisfaction domains (appearance, leisure time, physical health, and mental health), depressive symptoms, and suicidal behavior. Results: In the Spearman correlation analysis, female sex, perceived socioeconomic status (SES), happiness, and all four self-related satisfaction scores showed significant correlations with depression and suicidality. Multivariate regression analysis suggested that suicidality was significantly affected by perceived SES, satisfaction with appearance, mental health satisfaction, and depression. Finally, depression was identified as a partial mediator of the association between mental health satisfaction and suicidality, and a complete mediator of the association between female sex and suicidality. Conclusion Perceived SES, satisfaction with appearance, and mental health satisfaction significantly affected students’ suicidality, with or without the effect of depression. Health authorities, educators, and family members must be aware of this to identify adolescents at suicide risk earlier.