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Introduction: Obesity and associated risk factors have been linked to cognitive decline before., Objectives: In the present study, we evaluated potential cumulative negative effects of overweight and obesity on cognitive performance in euthymic patients with bipolar disorder (BD) in a longitudinal design., Methods: Neurocognitive measures (California Verbal Learning Test, Trail Making Test [TMT] A/B, Digit-Symbol-Test, Digit-Span, d2 Test), anthropometrics (e.g., body mass index [BMI]), and clinical ratings (Hamilton Depression Scale, Young Mania Rating Scale) were collected over a 12-month observation period. Follow-up data of 38 patients with BD (mean age 40 years; 15 males, 23 females) were available., Results: High baseline BMI predicted a decrease in the patient's performance in the Digit-Span backwards task measuring working memory performance. In contrast, cognitive performance was not predicted by increases in BMI at follow-up. Normal weight bipolar patients (n = 19) improved their performance on the TMT B, measuring cognitive flexibility and executive functioning, within 1 year, while overweight bipolar patients (n = 19) showed no change in this task., Conclusions: The results suggest that overweight can predict cognitive performance changes over 12 months., (© 2020 S. Karger AG, Basel.)

Circadian rhythms are associated with bipolar disorder (BD). This cross-sectional study aimed at investigating ARNTL and MAOA gene expression differences (1) between individuals with BD and controls, (2) between affective episodes, and (3) the relationship between ARNTL and MAOA expression. ARNTL and MAOA gene expression in peripheral mononuclear blood cells were analysed from fasting blood samples (BD n = 81, controls n = 54) with quantitative real-time PCR operating on TaqMan® assays (normalised to 18S RNA expression). ANCOVAs corrected for age, sex, body mass index, and medication was used to evaluate expression differences and correlation analyses for the relation between ARNTL and MAOA expression. ARNTL gene expression differed between affective episodes (F(2,78) = 3.198, p = 0.047, Partial Eta2= 0.083), but not between BD and controls (n.s.). ARNTL and MAOA expression correlated positively in BD (r = 0.704, p < 0.001) and in controls (r = 0.932, p < 0.001). MAOA expression differed neither between BD and controls nor between affective episodes (n.s.). Clock gene expression changes were observed in different affective states of BD. More precisely, ARNTL gene expression was significantly higher in euthymia than in depression. ARNTL and MAOA gene expression correlated significantly in BD and in controls, which emphasises the strong concatenation between circadian rhythms and neurotransmitter breakdown. [ABSTRACT FROM AUTHOR]

Introduction: The bidirectional connection between the brain and the gut within psychiatric entities has gained increasing scientific attention over the last years. As a regulator of intestinal permeability, zonulin acts as a key player on the interface of this interplay. Like several psychiatric disorders, intestinal permeability was associated with inflammation in previous findings.Methods: In this study we explored differences in zonulin serum levels in currently depressed (n = 55) versus currently euthymic (n = 37) individuals with an affective disorder. Further, we explored sex differences and possible influences on zonulin and affective symptoms like medication, age, body mass index, and smoking status.Results: Serum zonulin was significantly higher in females than in men independent from affective status (z = -2.412, p = .016). More specifically, females in the euthymic subgroup had higher zonulin levels than euthymic men (z = -2.114, p = .035). There was no difference in zonulin serum levels in individuals taking or not taking a specific psychopharmacotherapy. We found no correlation between zonulin serum levels and depression severity.Discussion: Increased serum zonulin levels as a proxy for increased intestinal permeability in women may indicate a state of elevated susceptibility for depression-inducing stimuli. [ABSTRACT FROM AUTHOR]

Objectives Food craving (FC) has been linked todepressive mood before. However, no study exists evaluating FC in a sample of bipolar disorder (BD). Aims This study aimed to determine the prevalence of FC in individuals with BD during euthymia. Methods Fifty individuals with a BD diagnosis according to the DSM-IV guidelines were drawn from the dedicated outpatient center of the University Clinic of Psychiatry Graz. Data were compared with data from a healthy control sample (HC, n=50). All probands took part in the BIPFAT study exploring shared pathophysiological pathways of obesity and brain function in BD. Participants completed a comprehensive diagnostic battery (including the Food Craving Questionnaire by White et al. 2002) measuring anamnestic, anthropometric, and clinical data. We performed a MANCOVA controlling for key covariates including gender, age, body mass index, smoking, mood stabilizing medication, and lipid levels. Results BD patients exhibited significantly more total food craving ( F =6.10, p =.016) and more sweets craving than controls ( F =6.38, p =.014). Additionally, levels of fat craving were higher by trend in the male patient group than in the male control group ( F =3.15, p =.087). Conclusions A higher prevalence of FC in BD patients than in controls suggests that FC may be of clinical importance in BD. Potentially, FC plays a role in the development of obesity, a well-known risk factor for unfavorable course of illness in BD. Furthermore, the impact of dysfunctions in the serotonergic system and/or an altered activation of the hypothalamic-pituitary-adrenal axis in relationship to increased FC are critically discussed. [ABSTRACT FROM AUTHOR]