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      Exploration of the Relationship Between Gut Microbiota and Polycystic Ovary Syndrome (PCOS): a Review Translated title: Erforschung der Beziehung zwischen intestinaler Mikrobiota und polyzystischem Ovarsyndrom (PCOS): eine Überblicksdarstellung

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          Abstract

          Polycystic ovary syndrome (PCOS) is an endocrine and metabolic syndrome (MS) with a complex etiology, and its pathogenesis is not yet clear. In recent years, the correlation between gut microbiota (GM) and metabolic disease has become a hot topic in research, leading to a number of new ideas about the etiology and pathological mechanisms of PCOS. The literature shows that GM can cause insulin resistance, hyperandrogenism, chronic inflammation and metabolic syndrome (obesity, diabetes) and may contribute to the development of PCOS by influencing energy absorption, the pathways of short chain fatty acids (SCFA), lipopolysaccharides, choline and bile acids, intestinal permeability and the brain–gut axis. As part of the treatment of PCOS, fecal microbiota transplantation, supplementation with prebiotics and traditional Chinese medicine can be used to regulate GM and treat disorders. This article reviews possible mechanisms and treatment options for PCOS, based on methods which target the GM, and offers new ideas for the treatment of PCOS.

          Zusammenfassung

          Das polyzystische Ovarsyndrom (PCOS) ist ein endokrines und metabolisches Syndrom (MS) mit einer komplexen Ätiologie. Die Pathogenese von PCOS ist noch immer ungeklärt. In den letzten Jahren hat sich die Forschung verstärkt auf die Interaktion zwischen intestinaler Mikrobiota und Stoffwechselerkrankungen konzentriert, was zu einigen neuen Ideen über die Ätiologie und die pathologischen Mechanismen von PCOS führte. In der Literatur wird berichtet, dass die intestinale Mikroflora Insulinresistenz, Hyperandrogenämie, chronische Entzündungen und metabolisches Syndrom (Adipositas, Diabetes) verursachen kann und durch ihre Auswirkungen auf Energieaufnahme, kurzkettige Fettsäuren, Lipopolysaccharide, Cholin und Gallensäuren, die Permeabilität der Darmschleimhaut sowie die Darm-Hirn-Achse möglicherweise zur Entwicklung von PCOS beitragen kann. Für die Behandlung von PCOS können fäkale Mikrobiomtransfers, eine Supplementierung mit Präbiotika und traditionelle chinesische Medizin zur Regulierung der Darmflora und Behandlung von Störungen eingesetzt werden. Dieser Artikel gibt eine Überblicksdarstellung möglicher Mechanismen und Behandlungsoptionen für PCOS, basierend auf Methoden, die auf eine Änderung der intestinalen Mikrobiota abzielen, und bietet neue Ideen für die Behandlung von PCOS.

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          Diversity and productivity in a long-term grassland experiment.

          Plant diversity and niche complementarity had progressively stronger effects on ecosystem functioning during a 7-year experiment, with 16-species plots attaining 2.7 times greater biomass than monocultures. Diversity effects were neither transients nor explained solely by a few productive or unviable species. Rather, many higher-diversity plots outperformed the best monoculture. These results help resolve debate over biodiversity and ecosystem functioning, show effects at higher than expected diversity levels, and demonstrate, for these ecosystems, that even the best-chosen monocultures cannot achieve greater productivity or carbon stores than higher-diversity sites.
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            Meta-analyses of human gut microbes associated with obesity and IBD.

            Recent studies have linked human gut microbes to obesity and inflammatory bowel disease, but consistent signals have been difficult to identify. Here we test for indicator taxa and general features of the microbiota that are generally consistent across studies of obesity and of IBD, focusing on studies involving high-throughput sequencing of the 16S rRNA gene (which we could process using a common computational pipeline). We find that IBD has a consistent signature across studies and allows high classification accuracy of IBD from non-IBD subjects, but that although subjects can be classified as lean or obese within each individual study with statistically significant accuracy, consistent with the ability of the microbiota to experimentally transfer this phenotype, signatures of obesity are not consistent between studies even when the data are analyzed with consistent methods. The results suggest that correlations between microbes and clinical conditions with different effect sizes (e.g. the large effect size of IBD versus the small effect size of obesity) may require different cohort selection and analysis strategies.
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              Gut microbiota–bile acid–interleukin-22 axis orchestrates polycystic ovary syndrome

              Polycystic ovary syndrome (PCOS) is characterized by androgen excess, ovulatory dysfunction and polycystic ovaries1, and is often accompanied by insulin resistance2. The mechanism of ovulatory dysfunction and insulin resistance in PCOS remains elusive, thus limiting the development of therapeutics. Improved metabolic health is associated with a relatively high microbiota gene content and increased microbial diversity3,4. This study aimed to investigate the impact of the gut microbiota and its metabolites on the regulation of PCOS-associated ovarian dysfunction and insulin resistance. Here, we report that Bacteroides vulgatus was markedly elevated in the gut microbiota of individuals with PCOS, accompanied by reduced glycodeoxycholic acid and tauroursodeoxycholic acid levels. Transplantation of fecal microbiota from women with PCOS or B. vulgatus-colonized recipient mice resulted in increased disruption of ovarian functions, insulin resistance, altered bile acid metabolism, reduced interleukin-22 secretion and infertility. Mechanistically, glycodeoxycholic acid induced intestinal group 3 innate lymphoid cell IL-22 secretion through GATA binding protein 3, and IL-22 in turn improved the PCOS phenotype. This finding is consistent with the reduced levels of IL-22 in individuals with PCOS. This study suggests that modifying the gut microbiota, altering bile acid metabolism and/or increasing IL-22 levels may be of value for the treatment of PCOS.
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                Author and article information

                Journal
                Geburtshilfe Frauenheilkd
                Geburtshilfe Frauenheilkd
                10.1055/s-00000020
                Geburtshilfe und Frauenheilkunde
                Georg Thieme Verlag KG (Stuttgart · New York )
                0016-5751
                1438-8804
                February 2020
                21 February 2020
                : 80
                : 2
                : 161-171
                Affiliations
                [1 ]Department of Heilongjiang University of Chinese Medicine, Harbin 150040, China
                [2 ]Department of Zhejiang Chinese Medical University, Hangzhou 310053, China
                [3 ]Department of First Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin 150040, China
                Author notes
                Correspondence Prof. Xiaoling Feng First Affiliated Hospital of Heilongjiang University of Chinese Medicine HepingHarbin 150040, HeilongjiangChina Doctorfxl@ 123456163.com
                Article
                10812036
                10.1055/a-1081-2036
                7035130
                32109968
                a38d31f7-6541-4579-bb40-a4abd09f986a

                This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License, which permits unrestricted reproduction and distribution, for non-commercial purposes only; and use and reproduction, but not distribution, of adapted material for non-commercial purposes only, provided the original work is properly cited.

                History
                : 16 October 2019
                : 10 December 2019
                : 11 December 2019
                Categories
                GebFra Science
                Review

                polycystic ovary syndrome,gut microbiota,metabolic syndrome,treatment,polyzystisches ovarsyndrom,intestinale mikrobiota,metabolisches syndrom,behandlung

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