Serum Interleukin-6 in Schizophrenia: Associations with Clinical and Sociodemographic Characteristics.

BACKGROUND: Recently a significant part of schizophrenia studies have been focused on the role of cytokines, especially interleukin-6 (IL-6). Some authors have suggested a pathogenetic role for IL-6 in schizophrenia and concluded that therapy that centers on suppressing IL-6 activity may prove beneficial for certain categories of patients with the disorder. However, many questions about whether the changes in IL-6 levels in schizophrenia are primary, related to symptoms or caused by therapy, are concomitant metabolic disorders, are related to smoking or other secondary factors remain unanswered. AIM: To assess the level of serum IL-6 in patients with schizophrenia in comparison with healthy controls, as well as to study its association with clinical and socio-demographic characteristics. METHODS: Some 125 patients with schizophrenia and 95 healthy volunteers were examined. The evaluation of IL-6 was performed by enzyme immunoassay. All patients were assessed using standardized psychometric instruments. Information from patient medical records on the course of the disease and treatment was analyzed. RESULTS: The level of IL-6 was significantly higher in the patients than in the healthy volunteers (z=2.58; p=0.0099), but among men the difference between the patients and volunteers was not significant. Statistically significant correlations were found between the level of serum IL-6 and the severity of the cognitive impairment of patients: (auditory [ρ=-0.31; p=0.00063] and working memory [ρ=-0.25; p=0.0065], hand-eye coordination [ρ=-0.29; p=0.0011], verbal fluency [ρ=-0.28; p=0.0019] and problem-solving capacity [ρ=-0.22; p=0.013]), total severity of schizophrenia symptoms (PANSS, ρ=0.22; p=0.016), PANSS positive subscale (ρ=0.18; p=0.048), and the age of manifestation (ρ=0.20; p=0.025) and disease duration (ρ=0.18; p=0.043). The level of IL-6 was the lowest in patients treated with third-generation antipsychotics, and the highest in those treated with first-generation antipsychotics (H=6.36; p=0.042). Moreover, in hospital patients, the level of IL-6 was significantly higher than in outpatients and inpatients hospitals (H=18.59; p=0.0001). CONCLUSION: The study confirmed that there are associations between the serum IL-6 level and schizophrenia, the age of the patient, duration of the disease and how late in one's life cycle it began manifesting itself, as well as a number of clinical characteristics. Considering that IL-6 is associated with a wide range of symptoms that are loosely controlled by antipsychotics, this biochemical marker needs to be studied to look into how closely its level tracks with an unfavorable course of schizophrenia. That would require further prospective studies.

Determinants of Stress Levels and Behavioral Reactions in Individuals With Affective or Anxiety Disorders During the COVID-19 Pandemic in Russia.

Introduction: Individuals with affective and anxiety disorders are among those most vulnerable to the negative effects of the COVID-19 pandemic. Aim: This study aims to analyze the determinants of stress levels and protective behavioral strategies associated with the COVID-19 pandemic in Russian-speaking people with affective or anxiety disorders (AADs). Materials and Methods: In this cross-sectional online survey, the psychological distress and behavioral patterns of respondents with self-reported AAD (n = 1,375) and without disorders (n = 4,278) were evaluated during three periods of restrictive measures in Russia (March-May 2020). Distress levels were verified using the Psychological Stress Measure (PSM-25). Results: Stress levels among respondents with AAD were higher at all study periods than for those with no mental disorder (Cohen's d 0.8-1.6). The stress level increased (Cohen's d = 0.4) in adolescents (16-18 years) with AAD and remained the same in those without disorders; in youths (19-24 years) with and without disorders, an increase (Cohen's d = 0.3) and a decrease (Cohen's d = 0.3) in the stress were observed, correspondingly; the stress in adults (25-44 years) with disorders did not change and decreased in those without disorders (Cohen's d = 0.4). Individuals with bipolar disorders demonstrated lower stress than individuals with depressive (Cohen's d = 0.15) and anxiety disorders (Cohen's d = 0.27). Respondents with depressive and bipolar disorders employed fewer protective measures simultaneously and were less likely to search for information about COVID-19. Conclusion: The presence of affective or anxiety disorders is associated with a more acute response to the COVID-19 pandemic. Apparently, the type of mental disorder influenced stress levels and protective behavior patterns.

Behavioral and Emotional Reactions of the Russian Population to the Beginning of the COVID-19 Pandemic: An On-Line Survey Results.

BACKGROUND: The study aimed to identify the patterns of adaptive and behavioral strategies in different population groups, also to evaluate their association with the infection prevention strategies and the distress during the COVID-19 pandemic. METHODS: The data were obtained from the on-line survey of 1958 respondents (mean age 31±12 years) from March 30, 2020 to April 5, 2020. 578 respondents reported a history of affective disorders; 884 respondents - a history of somatic disease. The level of anxiety distress was evaluated with the Psychological Stress Measure (PSM-25). The analysis of variance was used for statistics. p<0.05 was considered significant. The effect sizes (ES) were evaluated according to Cohen's d and Cramer's V criteria. RESULTS: The average PSM-25 score corresponded to moderate stress intensity. An increased level of psychological stress was associated with the young age of the respondents, the history of affective disorders and somatic diseases, the compliance with self-isolation, the practice of social distancing, and the use of sanitizer. Concerns about the availability of protective equipment were specifically associated with the self-isolation compliance (ES=0.1); the combination of concerns about the contagiousness of the virus (ES=0.12) and the inaccessibility of daily medications (ES=0.11) - with the principles of social distance. Moreover, the concerns about the lack of specific treatment, the danger to one's own life, the contagiousness of the virus, and the lack of protective equipment were associated with the protective behavior resulting in increased hand hygiene. The history of affective disorders was rarely associated with wearing masks and gloves, but more often - with the use of self-isolation strategies. CONCLUSIONS: The psychological reactions of the population during the COVID-19 pandemic are specifically associated with adaptive behavior in the process of anti-epidemic measures. Respondents with affective disorders experienced specific patterns of anxiety about coronavirus infection in combination with high rates of psychological stress.

The association of obesity with eating disorders risk: online survey of a large cohort of Russian-speaking individuals seeking medical weight correction assistance.

BACKGROUND: Eating Disorders pose a serious health risk to individuals. Often, eating disorder symptoms are overlooked when assessing obesity risk. The current cross-sectional study was focused on the search of association between disordered eating behaviors evaluated by Eating Attitudes Test 26 (EAT-26) and obesity in a large cohort of Russian-speaking adults seeking online assistance with medical weight correction. METHODS: The web-based cross-sectional study evaluated the data of online Eating Attitudes Test 26 (EAT-26) completed by 13,341 registered adult visitors of weight loss clinic website. The EAT-26 provides an overall score for potential eating disorders risk, as well as scores for three subscales: Bulimia, dieting, and oral control. Additional self-reported information about sex, weight, height, and age of respondents was used for analysis. The nonparametric analysis of variance and binominal logistic regression modeling were applied to search for an association between obesity and EAT-26 total score and subscales scores. The critical level of the significance was considered as α = 0.05. RESULTS: Women (94%) had lower BMI values but higher EAT-26 total score than men, which was indicated as statistically significant by a Wilcoxon Signed-Ranks Test (Z = - 11.80, p < 0.0001). Logistic regression for the whole cohort revealed that Bulimia subscale score was associated with higher risk of obesity (OR = 1.03, 95% CI 1.02-1.05) whereas higher score of EAT-26 oral control subscale was associated with decreased risk of obesity (OR = 0.93, 95% CI 0.91-0.95). Separate analysis for men and women showed that in men higher obesity risk was associated with higher oral control subscale scores (OR = 1.08, 95% CI 1.06-1.11); while in women both dieting and bulimia subscales scores were associated with higher obesity risk (OR = 1.02, 95% CI 1.01-1.03 and OR = 1.03, 95% CI 1.02-1.05, respectively). Older age was associated with obesity risk for both women and men. CONCLUSIONS: In a large cohort of individuals seeking medical weight correction assistance, the risk of obesity was associated with the higher EAT-26 scores, age, and sex. Moreover, different eating disorder risk profiles were associated with obesity in men and women. Higher oral control subscale score was associated with decreased risk of obesity in women, but with higher risk in men. Older age was a shared obesity risk factor for both sexes. Therefore, the use of EAT-26 would facilitate individual diagnostic assessment for specific eating disorders in different sub-cohorts. Further assessment of separate EAT-26 subscales may be important to predict sex-/age-specific risks of obesity that implies their study in the future. Obesity is a significant health problem. Different factors (e.g. social, biological, and behavioral) are important for their successful treatment. Abnormal eating behaviors may be one of the most likely predictors of increased body weight. This study aims to determine whether there is a significant association between obesity and scores on the eating behavior questionnaire-Eating Attitudes Test-26 (EAT-26)-in a large cohort of adults seeking medical weight correction assistance at a private weight loss clinic web-site. According to the study results, the association was shown for the male sex, older age, and higher Bulimia scores as measured on the EAT-26. Moreover, different EAT-26 scales were associated with obesity risks in women and men subgroups, while older age was a shared risk factor for obesity in both sexes. The findings may suggest sex-/age-specific diagnostic approach and treatment strategies for individuals with obesity.

Stress and Stigmatization in Health-Care Workers during the COVID-19 Pandemic.

BACKGROUND: The health-care workers showed the highest risks of the adverse psychological reactions from the COVID-19 pandemic. AIM: This study aimed to evaluate the structure and severity of psychological distress and stigmatization in different categories of health-care workers during the COVID-19 pandemic. MATERIALS AND METHODS: This study included two phases of online survey in 1800 Russian-speaking health-care workers (March 30 - April 5 and May 4 - May 10, 2020). The Psychological Stress Scale (PSM-25) and modified Perceived Devaluation-Discrimination scale (Cronbach's α = 0.74) were used. Dispersion analysis was performed with P = 0.05, Cohen's d, and Cramer's V calculated (effect size [ES]). RESULTS: The psychological stress levels decreased in the second phase (ES = 0.13), while the stigma levels (ES = 0.33) increased. Physicians experienced more stress compared with nurses and paramedical personnel (ES = 0.34; 0.64), but were less likely to stigmatize SARS-CoV-2-infected individuals (ES = 0.43; 0.41). The increasing probability of contact with infected individuals was associated with higher levels of psychological stress (probable contact ES = 0.48; definite contact ES=0.97). The highest rates of contacts with COVID-19 patients were reported by physicians (χ2 = 123.0; P = 0.00, Cramer's V = 0.2), the youngest (ES = 0.5), and less experienced medical workers (ES = 0.33). CONCLUSION: Direct contact with coronavirus infection is associated with a significant increase in stress among medical personnel. The pandemic compromises the psychological well-being of the youngest and highly qualified specialists. However, the stigmatizing reactions are not directly associated with the risks of infection and are most prevalent among nurses and paramedical personnel.

Opening up new horizons for psychiatric genetics in the Russian Federation: moving toward a national consortium.

We provide an overview of the recent achievements in psychiatric genetics research in the Russian Federation and present genotype-phenotype, population, epigenetic, cytogenetic, functional, ENIGMA, and pharmacogenetic studies, with an emphasis on genome-wide association studies. The genetic backgrounds of mental illnesses in the polyethnic and multicultural population of the Russian Federation are still understudied. Furthermore, genetic, genomic, and pharmacogenetic data from the Russian Federation are not adequately represented in the international scientific literature, are currently not available for meta-analyses and have never been compared with data from other populations. Most of these problems cannot be solved by individual centers working in isolation but warrant a truly collaborative effort that brings together all the major psychiatric genetic research centers in the Russian Federation in a national consortium. For this reason, we have established the Russian National Consortium for Psychiatric Genetics (RNCPG) with the aim to strengthen the power and rigor of psychiatric genetics research in the Russian Federation and enhance the international compatibility of this research.The consortium is set up as an open organization that will facilitate collaborations on complex biomedical research projects in human mental health in the Russian Federation and abroad. These projects will include genotyping, sequencing, transcriptome and epigenome analysis, metabolomics, and a wide array of other state-of-the-art analyses. Here, we discuss the challenges we face and the approaches we will take to unlock the huge potential that the Russian Federation holds for the worldwide psychiatric genetics community.