Relationship between Occupational Stress, 5-HT2A Receptor Polymorphisms and Mental Health in Petroleum Workers in the Xinjiang Arid Desert: A Cross-Sectional Study

Polygalae Radix Oligosaccharide Esters May Relieve Depressive-like Behavior in Rats with Chronic Unpredictable Mild Stress via Modulation of Gut Microbiota

Polygalae radix (PR) is a well-known traditional Chinese medicine that is used to treat depression, and polygalae radix oligosaccharide esters (PROEs) are the main active ingredient. Although gut microbiota are now believed to play key role in depression, the effects of PROEs on depression via modulation of gut microbiota remain unknown. In this article, we investigate the effect of PROEs on the gut microbiota of a depression rat and the possible mechanism responsible. The depression rat model was induced by solitary rearing combined with chronic unpredictable mild stress (CUMS). The depression-like behavior, the influence on the hypothalamic-pituitary-adrenal (HPA) axis, the contents of monoamine neurotransmitter in the hippocampus, and the quantity of short-chain fatty acids (SCFAs) in the feces were each assessed, and the serum levels of lipopolysaccharide (LPS) and interleukin-6 (IL-6) were measured by ELISA. Additionally, ultrastructural changes of the duodenal and colonic epithelium were observed under transmission electron microscope, and the gut microbiota were profiled by using 16S rRNA sequencing. The results show that PROEs alleviated the depression-like behavior of the depression model rats, increased the level of monoamine neurotransmitters in the brain, and reduced the hyperfunction of the HPA axis. Furthermore, PROEs regulated the imbalance of the gut microbiota in the rats, relieving intestinal mucosal damage by increasing the relative abundance of gut microbiota with intestinal barrier protective functions, and adjusting the level of SCFAs in the feces, as well as the serum levels of LPS and IL-6. Thus, we find that PROEs had an antidepressant effect through the restructuring of gut microbiota that restored the function of the intestinal barrier, reduced the release of intestinal endotoxin, and constrained the inflammatory response.

Determinants of Workplace Productivity Decline in the Tunisian Onshore Oil and Gas Industry

Background

This study explored the impact of occupational stress, personal factors, and physical conditions on work productivity decline (WPD) among workers in the Tunisian onshore oil and gas industry.

Methods

We conducted a cross-sectional survey among 246 onshore oil installation workers of a Tunisian private oil company. 94 employees (48%) participated in this study. We used the Job Content Questionnaire to evaluate occupational stress and the Work Productivity and Activity Impairment Questionnaire to assess the WPD.

Results

Data were analysed using R software. This study exclusively included male workers, with an average age of 41.1 ± 9.5 years. Binary logistic regression analysis identified low social support and job-strain situation as the most associated risk factors (OR >3). The random forest model suggested that professional category, job-strain situation, low social support, and iso-strain situation were the most important variables in predicting WPD.

Conclusion

These data provided evidence that petroleum workers faced a monotonous lifestyle in the workplace, leading to high levels of occupational stress that affected their work productivity. This study is the first in Tunisia in the oil sector.

Peer victimization, depression, and non-suicidal self-injury among Chinese adolescents: the moderating role of the 5-HTR2A gene rs6313 polymorphism

BACKGROUND

Peer victimization is a crucial risk predictor for adolescent non-suicidal self-injury (NSSI). However, adolescent NSSI reactions to peer victimization exhibit large individual differences. This study explored whether depression mediated the association between peer victimization and adolescent NSSI, and whether this mediating path was moderated by the 5-HTR2A gene rs6313 polymorphism.

METHODS

A total of 667 adolescents (Mean_age = 12.81, SD = 0.48) completed questionnaires regarding peer victimization, depression, and NSSI. Genomic DNA was extracted from saliva and buccal cells from each participant.

RESULTS

The results showed that the positive relation between peer victimization and adolescent NSSI was mediated by depression. Moreover, the triple interaction between peer victimization, rs6313 polymorphism, and gender on adolescent depression was significant. And the triple interaction between depression, rs6313 polymorphism, and gender on adolescent NSSI was also significant. Specifically, the risk effect of peer victimization on adolescent NSSI through increased depression was stronger for female adolescents with CC genotype than for female adolescents with CT or TT genotype, and male adolescents with CT or TT genotype. However, the indirect effect was nonsignificant for male adolescents with CC genotype.

CONCLUSIONS

These findings promote the etiological understanding of adolescent NSSI, highlighting the mediating and moderating effect between peer victimization and NSSI, and adding evidence supporting the relationship between the 5-HTR2A gene rs6313 polymorphism, depression and adolescent NSSI.

Occupational stress and associated risk factors among 13,867 industrial workers in China

Objective

Occupational stress is a critical global public health problem. We aimed to evaluate the prevalence of occupational stress among the workers in the electricity, heat, gas, water production and supply (EHGWPS), manufacturing, and transportation industries in Beijing, China. We explored the demographic differences in occupational stress status among workers in industrial enterprises.

Methods

A cross-sectional study was conducted on 13,867 workers. The self-administered New Brief Job Stress Questionnaire was used to evaluate high occupational stress status, which includes four sub-dimensions (job stressors, stress response, social support, job stressors & social support). Multiple regression and logistic regression models were used to estimate the association between high occupational stress and the four occupational stress sub-dimensions with risk factors.

Results

A total of 13,867 workers were included. The prevalence of high occupational stress was 3.3% in the EHGWPS industries, 10.3% in manufacturing, and 5.8% in transportation. The prevalence of high occupational stress was higher than in the other two categories (p < 0.05) in manufacturing industries. Logistic regression analysis showed that male workers with lower educational status, more job experience, and working in manufacturing were vulnerable to high occupational stress. Further analysis of the four occupational stress sub-dimensions showed that male workers, older adult workers, workers with lower educational levels, and longer working time were associated with higher scores in job stressors, stress response, social support, and job stress & social support (all p < 0.05). Moreover, divorced or widowed workers had higher occupational stress scores.

Conclusion

Male workers with lower educational levels and longer working time may have an increased risk of occupational stress.

Perceptions of Work-Related Stress and Ethical Misconduct Amongst Non-tenured Researchers in Italy

The relationship between stress and unethical behaviour amongst non-tenured research staff in academia is a relatively unexplored phenomenon. The research reported herein was therefore carried out with the aim of exploring the relationship(s) between stress, the socio-organisational factors which contribute to it, job satisfaction, perceptions of job instability, and the occurrence of unethical behaviour in research. 793 Italian researchers participated in the research-all of whom were working on fixed-term contracts-after being individually requested to complete an online questionnaire. The data indicate that unethical behaviours occur with alarming frequency. The stress level reported is quite high, as is the level of perceived job insecurity, both of which impact upon levels of job satisfaction. Perceived stress levels also seem to play a role in the commission of unethical behaviours, but this relationship is irrelevant when one considers the role of social and organisational factors that are known to induce it. Indeed, it seems that there are various socio-organisational determinants of stress that have an obvious direct negative influence on the commission of unethical behaviours more than the stress level per se. This research paints a worrying picture in relation to the psycho-physical state of non-tenured researchers as a result of the working conditions in which they find themselves in Italian universities.

Associations between erectile dysfunction and psychological disorders (depression and anxiety): A cross-sectional study in a Chinese population

The present cross-sectional survey was performed to evaluate the prevalences and correlations of depression and anxiety among Chinese erectile dysfunction (ED) men. Between February 2017 and January 2019, male patients with or without ED treated in andrology clinic and urology clinic were enrolled in the investigation. All enrolled patients were required to fill in the International Index of Erectile Function Questionnaire (IIEF-5), Patient Health Questionnaire (PHQ-9) and Generalized Anxiety Disorder 7-item scale (GAD-7) which intended to evaluate the diagnosis and severity of ED, depression and anxiety respectively. Of the 958 included participants, 79.82% (613/768) and 79.56% (611/768) ED patients appeared to have anxiety and depression; 13.68% (26/190) of men without ED had anxiety and depression. In addition, young ED patients (age ≤35 years) and long ED duration patients (duration >12 months) had higher incidences and severities of anxiety and depression (p < .05). After adjusting the age, IIEF-5 was negatively correlated with PHQ-9 (adjusted r = -.653, p < .001) and GAD-7 scores (adjusted r = -.607, p < .001). The prevalences of anxiety and depression were 79.82% and 79.56% in Chinese ED patients. The prevalences and severities of anxiety and depression increased as the ED severity increased. Based on the high incidences of anxiety and depression among Chinese ED patients, clinicians are supposed to pay more attention to early diagnosis and therapy of psychiatric symptoms for ED patients, especially among young patients and patients with long ED duration.

Associations between occupational stress and demographic characteristics in petroleum workers in the Xinjiang arid desert

Owing to the transformation of the biomedical model of health, more and more professionals pay close attention to the occupational social psychological factors, such as occupational stress. Due to the socioeconomic impact of occupational stress and the petroleum workers stationed in the unique environment in Xinjiang, a cross-sectional study was carried out between May and December 2016 to investigate the relationship between occupational stress and demographic characteristics. A total of 1480 workers were selected. Occupational stress was evaluated with the Occupational Stress Inventory-Revised Edition. The findings of the present study revealed that the values of the Occupational Roles Questionnaire results (t = 9.266, P < .001) and Personal Strain Questionnaire results (t = 21.381, P < .001) were found to be higher than the national normal. Personal Resources Questionnaire values (t = -17.575, P < .001) were found to be lower than the national normal in petroleum workers stationed in the arid desert, and suggested a strong correlation between occupational stress and demographic characteristics. These data provide evidence that different demographic characteristics are associated with different occupational stress levels in petroleum workers stationed in the arid desert.