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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
    Location Call Number Limitation Availability
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  • 2
    In: Antioxidants, MDPI AG, Vol. 11, No. 7 ( 2022-06-28), p. 1283-
    Abstract: Dietary polyphenols, which are present in Aronia melanocarpa, have been associated with various beneficial effects on human health including antioxidant, antiviral, and anti-inflammatory activities. We aimed to investigate the immunomodulatory effects of aronia juice polyphenols in a randomized placebo-controlled human intervention study and cell culture experiments. A total of 40 females were asked to consume either 200 mL of aronia juice or a placebo drink for six weeks and were investigated again after a washout period of another six weeks. We observed that only half of the participants tolerated the aronia juice well (Vt) and the other half reported complaints (Vc). The placebo (P) was generally tolerated with one exception (p = 0.003). Plasma polyphenol levels increased significantly in Vt after the intervention (p = 0.024) but did neither in P nor in Vc. Regulatory T cell (Treg) frequencies remained constant in Vt and P during the intervention, whereas Tregs decreased in Vc (p = 0.018). In cell culture, inhibiting effects of ferulic acid (p = 0.0005) and catechin (p = 0.0393) on the differentiation of Tregs were observed as well as reduced activation of CD4-T cells in ferulic acid (p = 0.0072) and aronia juice (p = 0.0163) treated cells. Interestingly, a CD4+CD25−FoxP3+ cell population emerged in vitro in response to aronia juice, but not when testing individual polyphenols. In conclusion, our data strengthen possible individual hormetic effects, the importance of the food matrix for bioactivity, and the need for further investigations on possible impacts of specific physiological features such as the gut microbiota in the context of personalized nutrition.
    Type of Medium: Online Resource
    ISSN: 2076-3921
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2704216-9
    SSG: 15,3
    Location Call Number Limitation Availability
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