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  • 1
    In: CNS & Neurological Disorders - Drug Targets, Bentham Science Publishers Ltd., Vol. 15, No. 4 ( 2016-03-28), p. 381-389
    Materialart: Online-Ressource
    ISSN: 1871-5273
    Sprache: Englisch
    Verlag: Bentham Science Publishers Ltd.
    Publikationsdatum: 2016
    SSG: 15,3
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    In: Antioxidants, MDPI AG, Vol. 10, No. 11 ( 2021-11-10), p. 1795-
    Kurzfassung: Immune-mediated inflammatory processes and oxidative stress are involved in the aetiopathogenesis of bipolar disorder (BD) and weight-associated comorbidities. Tryptophan breakdown via indoleamine 2,3-dioxygenase-1 (IDO-1) along the kynurenine axis concomitant with a pro-inflammatory state was found to be more active in BD, and associated with overweight/obesity. This study aimed to investigate tryptophan metabolism in BD compared to controls (C), stratified by weight classes, in a longitudinal setting, dependent on the incidence of BD episodes. Peripheral tryptophan, kynurenine, and neopterin were assessed in the serum of 226 BD individuals and 142 C. Three samples in a longitudinal assessment were used for 75 BD individuals. Results showed a higher kynurenine/tryptophan in both BD compared to C and overweight compared to normal weight persons. Levels remained stable over time. In the longitudinal course, no differences were found between individuals who were constantly euthymic or not, or who had an illness episode or had none. Findings indicate that tryptophan, kynurenine, and IDO-1 activity may play a role in pathophysiology in BD but are not necessarily associated with clinical manifestations. Accelerated tryptophan breakdown along the kynurenine axis may be facilitated by being overweight. This may increase the risk of accumulation of neurotoxic metabolites, impacting BD symptomatology, cognition, and somatic comorbidities.
    Materialart: Online-Ressource
    ISSN: 2076-3921
    Sprache: Englisch
    Verlag: MDPI AG
    Publikationsdatum: 2021
    ZDB Id: 2704216-9
    SSG: 15,3
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
    In: Neuropsychobiology, S. Karger AG, Vol. 80, No. 1 ( 2021), p. 1-11
    Kurzfassung: 〈 b 〉 〈 i 〉 Introduction: 〈 /i 〉 〈 /b 〉 Obesity and associated risk factors have been linked to cognitive decline before. 〈 b 〉 〈 i 〉 Objectives: 〈 /i 〉 〈 /b 〉 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. 〈 b 〉 〈 i 〉 Methods: 〈 /i 〉 〈 /b 〉 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. 〈 b 〉 〈 i 〉 Results: 〈 /i 〉 〈 /b 〉 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 ( 〈 i 〉 n 〈 /i 〉 = 19) improved their performance on the TMT B, measuring cognitive flexibility and executive functioning, within 1 year, while overweight bipolar patients ( 〈 i 〉 n 〈 /i 〉 = 19) showed no change in this task. 〈 b 〉 〈 i 〉 Conclusions: 〈 /i 〉 〈 /b 〉 The results suggest that overweight can predict cognitive performance changes over 12 months.
    Materialart: Online-Ressource
    ISSN: 0302-282X , 1423-0224
    Sprache: Englisch
    Verlag: S. Karger AG
    Publikationsdatum: 2021
    ZDB Id: 1483094-2
    SSG: 5,2
    SSG: 15,3
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
    In: Neuropsychobiology, S. Karger AG, Vol. 79, No. 1 ( 2020), p. 71-79
    Kurzfassung: The importance of the microbiome for psychological well-being has gained rising interest in the last decade. A strategy to examine the role of the microbiome in different diseases is the intake of supplements that modulate the gut microbiome. Despite promising results in animal studies, research in humans is sparse to date and especially in individuals with psychiatric disorders almost missing. The current report of the ProbioBIP-one pilot study aims at describing general effects of the intake of the probiotic OMNi-BiOTiC Stress repair® on psychological parameters as well as gastrointestinal symptoms and general compliance in a cohort of euthymic individuals with bipolar disorder (BD), receiving daily probiotic treatment over a time period of 3 months. Twenty-seven individuals with BD took part in the present study (mean age = 50.7 years, SD = 12.2; females 40.7%). In sum, there was a high compliance rate with 81.5% of the study participants completing all 3 study visits and 85% of planned probiotic ingestions taken. Gastrointestinal problems were prevalent in more than half of the patients at the time of inclusion (t1). Expectedly, in the whole cohort, a high proportion of study participants experienced changes concerning digestion during probiotic treatment, around one third reported positive changes (reduced flatulence and easier and more frequent bowel movements) after 1 month (t2) and further after 3 months (t3). In contrast, a smaller part of study participants reported gastrointestinal discomfort after 1 and after 3 months (mainly flatulence and obstipation). We found a significantly reduced cognitive reactivity to sad mood between t2 and t3 indicating that participants under probiotic supplementation perceived themselves to be less distracted by ruminative thoughts. Further changes in psychiatric symptoms were small due to the euthymic state and already low scoring at the time of inclusion. Nevertheless, we found a significant symptom reduction in the rating scales measuring manic symptoms. From a clinical point of view, probiotic supplementation might provide a well-tolerated tool to positively influence gastrointestinal quality of life as well as mental and somatic health, cognition and immune response and potentially have effects on psychiatric symptoms.
    Materialart: Online-Ressource
    ISSN: 0302-282X , 1423-0224
    Sprache: Englisch
    Verlag: S. Karger AG
    Publikationsdatum: 2020
    ZDB Id: 1483094-2
    SSG: 5,2
    SSG: 15,3
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 5
    In: Neuropsychobiology, S. Karger AG, Vol. 82, No. 4 ( 2023), p. 220-233
    Kurzfassung: 〈 b 〉 〈 i 〉 Introduction: 〈 /i 〉 〈 /b 〉 Sleep disturbances are highly prevalent across most major psychiatric disorders. Alterations in the hypothalamic-pituitary-adrenal axis, neuroimmune mechanisms, and circadian rhythm disturbances partially explain this connection. The gut microbiome is also suspected to play a role in sleep regulation, and recent studies suggest that certain probiotics, prebiotics, synbiotics, and fecal microbiome transplantation can improve sleep quality. 〈 b 〉 〈 i 〉 Methods: 〈 /i 〉 〈 /b 〉 We aimed to assess the relationship between gut-microbiota composition, psychiatric disorders, and sleep quality in this cross-sectional, cross-disorder study. We recruited 103 participants, 63 patients with psychiatric disorders (major depressive disorder [ 〈 i 〉 n 〈 /i 〉 = 31], bipolar disorder [ 〈 i 〉 n 〈 /i 〉 = 13], psychotic disorder [ 〈 i 〉 n 〈 /i 〉 = 19]) along with 40 healthy controls. Sleep quality was assessed with the Pittsburgh Sleep Quality Index (PSQI). The fecal microbiome was analyzed using 16S rRNA sequencing, and groups were compared based on alpha and beta diversity metrics, as well as differentially abundant species and genera. 〈 b 〉 〈 i 〉 Results: 〈 /i 〉 〈 /b 〉 A transdiagnostic decrease in alpha diversity and differences in beta diversity indices were observed in psychiatric patients, compared to controls. Correlation analysis of diversity metrics and PSQI score showed no significance in the patient and control groups. However, three species, 〈 i 〉 Ellagibacter isourolithinifaciens 〈 /i 〉 , 〈 i 〉 Senegalimassilia faecalis 〈 /i 〉 , and uncultured 〈 i 〉 Blautia 〈 /i 〉 sp., and two genera, 〈 i 〉 Senegalimassilia 〈 /i 〉 and uncultured 〈 i 〉 Muribaculaceae 〈 /i 〉 genus, were differentially abundant in psychiatric patients with good sleep quality (PSQI & gt;8), compared to poor-sleep quality patients (PSQI ≤8). 〈 b 〉 〈 i 〉 Conclusion: 〈 /i 〉 〈 /b 〉 In conclusion, this study raises important questions about the interconnection of the gut microbiome and sleep disturbances.
    Materialart: Online-Ressource
    ISSN: 0302-282X , 1423-0224
    Sprache: Englisch
    Verlag: S. Karger AG
    Publikationsdatum: 2023
    ZDB Id: 1483094-2
    SSG: 5,2
    SSG: 15,3
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 6
    In: Current Topics in Medicinal Chemistry, Bentham Science Publishers Ltd., Vol. 20, No. 15 ( 2020-06-01), p. 1344-1352
    Kurzfassung: The kynurenine pathway is involved in inflammatory diseases. Alterations of this pathway were shown in psychiatric entities as well. The aim of this study was to determine whether specific changes in kynurenine metabolism are associated with current mood symptoms in bipolar disorder. Methods: Sum scores of the Hamilton Depression Scale, Beck Depression Inventory, and Young Mania Rating Scale were collected from 156 bipolar individuals to build groups of depressive, manic and euthymic subjects according to predefined cut-off scores. Severity of current mood symptoms was correlated with activities of the enzymes kynurenine 3-monooxygenase (ratio of 3-hydroxykynurenine/ kynurenine), kynurenine aminotransferase (ratio of kynurenic acid/ kynurenine) and kynureninase (ratio of 3-hydroxyanthranilic acid/ 3-hydroxykynurenine), proxied by ratios of serum concentrations. Results: Individuals with manic symptoms showed a shift towards higher kynurenine 3-monooxygenase activity (χ2 = 7.14, Df = 2, p = .028), compared to euthymic as well as depressed individuals. There were no differences between groups regarding activity of kynurenine aminotransferase and kynureninase. Within the group of depressed patients, Hamilton Depression Scale and kynurenine aminotransferase showed a significant negative correlation (r = -0.41, p = .036), displaying lower metabolism in the direction of kynurenic acid. Conclusion: Depression severity in bipolar disorder seems to be associated with a decreased synthesis of putative neuroprotective kynurenic acid. Furthermore, higher kynurenine 3-monooxygenase activity in currently manic individuals indicates an increased inflammatory state within bipolar disorder with more severe inflammation during manic episodes. The underlying pathophysiological mechanisms of the different affective episodes could represent parallel mechanisms rather than opposed processes.
    Materialart: Online-Ressource
    ISSN: 1568-0266
    Sprache: Englisch
    Verlag: Bentham Science Publishers Ltd.
    Publikationsdatum: 2020
    SSG: 15,3
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 7
    In: Neuropsychobiology, S. Karger AG, Vol. 79, No. 1 ( 2020), p. 63-70
    Kurzfassung: 〈 b 〉 〈 i 〉 Introduction: 〈 /i 〉 〈 /b 〉 Cognitive dysfunction is prevalent in depressive as well as manic episodes in individuals with Bipolar Disorder (BD). Even more, after symptom remission, many individuals with BD experience persisting cognitive impairment also in euthymic periods, leading to high illness burden and low quality of life. According to a recent research in animals and healthy humans, microbiota may influence cognitive processes via the brain-gut axis. A strategy to examine the role of the microbiota in different diseases is the intake of supplements that modulate the gut microbiome. The aim of this pilot study was to analyze the impact of probiotic supplements on cognitive parameters in a cohort of euthymic individuals with BD, receiving daily probiotic treatment over a time period of 3 months. 〈 b 〉 〈 i 〉 Methods: 〈 /i 〉 〈 /b 〉 A total of 20 euthymic individuals with BD received probiotic supplement over a time period of 3 months and completed a cognitive test battery at 3 time points (t1 at time of inclusion, t2 after one month and t3 after 3 months of probiotic intake). 〈 b 〉 〈 i 〉 Results: 〈 /i 〉 〈 /b 〉 We found a significant improvement of performance concerning attention and psychomotor processing speed measured with the Digit Symbol Test after one (t2) as well as after 3 months (t3) of treatment ( 〈 i 〉 F 〈 /i 〉 = 8.60; 〈 i 〉 η 〈 /i 〉 〈 sup 〉 2 〈 /sup 〉 = 0.49, 〈 i 〉 p 〈 /i 〉 & #x3c; 0.01). Furthermore, executive function measured with the TMT-B, increased significantly over 3 months ( 〈 i 〉 F 〈 /i 〉 = 3.68; 〈 i 〉 η 〈 /i 〉 〈 sup 〉 2 〈 /sup 〉 = 0.29, 〈 i 〉 p 〈 /i 〉 & #x3c; 0.05). 〈 b 〉 〈 i 〉 Conclusion: 〈 /i 〉 〈 /b 〉 The results confirm the hypotheses that probiotic supplement might help stable individuals with BD to improve the cognitive function, which in turn might lead to better psychosocial, occupational, work and financial functioning. Nevertheless, the idea of this potential new treatment is challenging because of the variety of the human’s gut microbiota.
    Materialart: Online-Ressource
    ISSN: 0302-282X , 1423-0224
    Sprache: Englisch
    Verlag: S. Karger AG
    Publikationsdatum: 2020
    ZDB Id: 1483094-2
    SSG: 5,2
    SSG: 15,3
    Standort Signatur Einschränkungen Verfügbarkeit
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