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  • 1
    In: Neuropsychobiology, S. Karger AG, Vol. 82, No. 4 ( 2023), p. 220-233
    Abstract: 〈 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.
    Type of Medium: Online Resource
    ISSN: 0302-282X , 1423-0224
    Language: English
    Publisher: S. Karger AG
    Publication Date: 2023
    detail.hit.zdb_id: 1483094-2
    SSG: 5,2
    SSG: 15,3
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  • 2
    In: Nutrients, MDPI AG, Vol. 12, No. 11 ( 2020-11-08), p. 3422-
    Abstract: Gut microbiota are suspected to affect brain functions and behavior as well as lowering inflammation status. Therefore, an effect on depression has already been suggested by recent research. The aim of this randomized double-blind controlled trial was to evaluate the effect of probiotic treatment in depressed individuals. Within inpatient care, 82 currently depressed individuals were randomly assigned to either receive a multistrain probiotic plus biotin treatment or biotin plus placebo for 28 days. Clinical symptoms as well as gut microbiome were analyzed at the begin of the study, after one and after four weeks. After 16S rRNA analysis, microbiome samples were bioinformatically explored using QIIME, SPSS, R and Piphillin. Both groups improved significantly regarding psychiatric symptoms. Ruminococcus gauvreauii and Coprococcus 3 were more abundant and β-diversity was higher in the probiotics group after 28 days. KEGG-analysis showed elevated inflammation-regulatory and metabolic pathways in the intervention group. The elevated abundance of potentially beneficial bacteria after probiotic treatment allows speculations on the functionality of probiotic treatment in depressed individuals. Furthermore, the finding of upregulated vitamin B6 and B7 synthesis underlines the connection between the quality of diet, gut microbiota and mental health through the regulation of metabolic functions, anti-inflammatory and anti-apoptotic properties. Concluding, four-week probiotic plus biotin supplementation, in inpatient individuals with a major depressive disorder diagnosis, showed an overall beneficial effect of clinical treatment. However, probiotic intervention compared to placebo only differed in microbial diversity profile, not in clinical outcome measures.
    Type of Medium: Online Resource
    ISSN: 2072-6643
    Language: English
    Publisher: MDPI AG
    Publication Date: 2020
    detail.hit.zdb_id: 2518386-2
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  • 3
    In: Nutrients, MDPI AG, Vol. 12, No. 9 ( 2020-08-26), p. 2575-
    Abstract: Major depressive disorder (MDD) is a prevalent disease, in which one third of sufferers do not respond to antidepressants. Probiotics have the potential to be well-tolerated and cost-efficient treatment options. However, the molecular pathways of their effects are not fully elucidated yet. Based on previous literature, we assume that probiotics can positively influence inflammatory mechanisms. We aimed at analyzing the effects of probiotics on gene expression of inflammation genes as part of the randomized, placebo-controlled, multispecies probiotics PROVIT study in Graz, Austria. Fasting blood of 61 inpatients with MDD was collected before and after four weeks of probiotic intake or placebo. We analyzed the effects on gene expression of tumor necrosis factor (TNF), nuclear factor kappa B subunit 1 (NFKB1) and interleukin-6 (IL-6). In IL-6 we found no significant main effects for group (F(1,44) = 1.33, p = ns) nor time (F(1,44) = 0.00, p = ns), but interaction was significant (F(1,44) = 5.67, p 〈 0.05). The intervention group showed decreasing IL-6 gene expression levels while the placebo group showed increasing gene expression levels of IL-6. Probiotics could be a useful additional treatment in MDD, due to their anti-inflammatory effects. Results of the current study are promising, but further studies are required to investigate the beneficial effects of probiotic interventions in depressed individuals.
    Type of Medium: Online Resource
    ISSN: 2072-6643
    Language: English
    Publisher: MDPI AG
    Publication Date: 2020
    detail.hit.zdb_id: 2518386-2
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