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  1. Article ; Online: Gut microbial metabolites as multi-kingdom intermediates.

    Krautkramer, Kimberly A / Fan, Jing / Bäckhed, Fredrik

    Nature reviews. Microbiology

    2020  Volume 19, Issue 2, Page(s) 77–94

    Abstract: The gut microbiota contributes to host physiology through the production of a myriad of metabolites. These metabolites exert their effects within the host as signalling molecules and substrates for metabolic reactions. Although the study of host- ... ...

    Abstract The gut microbiota contributes to host physiology through the production of a myriad of metabolites. These metabolites exert their effects within the host as signalling molecules and substrates for metabolic reactions. Although the study of host-microbiota interactions remains challenging due to the high degree of crosstalk both within and between kingdoms, metabolite-focused research has identified multiple actionable microbial targets that are relevant for host health. Metabolites, as the functional output of combined host and microorganism interactions, provide a snapshot in time of an extraordinarily complex multi-organism system. Although substantial work remains towards understanding host-microbiota interactions and the underlying mechanisms, we review the current state of knowledge for each of the major classes of microbial metabolites with emphasis on clinical and translational research implications. We provide an overview of methodologies available for measurement of microbial metabolites, and in addition to discussion of key challenges, we provide a potential framework for integration of discovery-based metabolite studies with mechanistic work. Finally, we highlight examples in the literature where this approach has led to substantial progress in understanding host-microbiota interactions.
    MeSH term(s) Animals ; Chromatography, Liquid ; Energy Metabolism/physiology ; Fermentation/physiology ; Gastrointestinal Microbiome/physiology ; Host Microbial Interactions/physiology ; Humans ; Mass Spectrometry ; Metabolome/physiology ; Metabolomics/methods ; Nuclear Magnetic Resonance, Biomolecular ; Spectrum Analysis, Raman
    Language English
    Publishing date 2020-09-23
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S. ; Review
    ZDB-ID 2139054-X
    ISSN 1740-1534 ; 1740-1526
    ISSN (online) 1740-1534
    ISSN 1740-1526
    DOI 10.1038/s41579-020-0438-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Chemical signaling between gut microbiota and host chromatin: What is your gut really saying?

    Krautkramer, Kimberly A / Rey, Federico E / Denu, John M

    The Journal of biological chemistry

    2017  Volume 292, Issue 21, Page(s) 8582–8593

    Abstract: Mammals and their gut microbial communities share extensive and tightly coordinated co-metabolism of dietary substrates. A large number of microbial metabolites have been detected in host circulation and tissues and, in many cases, are linked to host ... ...

    Abstract Mammals and their gut microbial communities share extensive and tightly coordinated co-metabolism of dietary substrates. A large number of microbial metabolites have been detected in host circulation and tissues and, in many cases, are linked to host metabolic, developmental, and immunological states. The presence of these metabolites in host tissues intersects with regulation of the host's epigenetic machinery. Although it is established that the host's epigenetic machinery is sensitive to levels of endogenous metabolites, the roles for microbial metabolites in epigenetic regulation are just beginning to be elucidated. This review focuses on eukaryotic chromatin regulation by endogenous and gut microbial metabolites and how these regulatory events may impact host developmental and metabolic phenotypes.
    MeSH term(s) Animals ; Chromatin Assembly and Disassembly ; Epigenesis, Genetic ; Gastrointestinal Microbiome ; Humans ; Intestinal Mucosa/metabolism ; Intestines/microbiology ; Signal Transduction
    Language English
    Publishing date 2017-04-07
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2997-x
    ISSN 1083-351X ; 0021-9258
    ISSN (online) 1083-351X
    ISSN 0021-9258
    DOI 10.1074/jbc.R116.761577
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Metabolic programming of the epigenome: host and gut microbial metabolite interactions with host chromatin.

    Krautkramer, Kimberly A / Dhillon, Rashpal S / Denu, John M / Carey, Hannah V

    Translational research : the journal of laboratory and clinical medicine

    2017  Volume 189, Page(s) 30–50

    Abstract: The mammalian gut microbiota has been linked to host developmental, immunologic, and metabolic outcomes. This collection of trillions of microbes inhabits the gut and produces a myriad of metabolites, which are measurable in host circulation and ... ...

    Abstract The mammalian gut microbiota has been linked to host developmental, immunologic, and metabolic outcomes. This collection of trillions of microbes inhabits the gut and produces a myriad of metabolites, which are measurable in host circulation and contribute to the pathogenesis of human diseases. The link between endogenous metabolite availability and chromatin regulation is a well-established and active area of investigation; however, whether microbial metabolites can elicit similar effects is less understood. In this review, we focus on seminal and recent research that establishes chromatin regulatory roles for both endogenous and microbial metabolites. We also highlight key physiologic and disease settings where microbial metabolite-host chromatin interactions have been established and/or may be pertinent.
    MeSH term(s) Animals ; Cellular Reprogramming/genetics ; Chromatin/metabolism ; Epigenomics ; Gastrointestinal Microbiome/genetics ; Host-Pathogen Interactions/genetics ; Humans ; Metabolome/genetics
    Chemical Substances Chromatin
    Language English
    Publishing date 2017-09-01
    Publishing country United States
    Document type Journal Article ; Review ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, N.I.H., Extramural
    ZDB-ID 2246684-8
    ISSN 1878-1810 ; 1532-6543 ; 1931-5244
    ISSN (online) 1878-1810 ; 1532-6543
    ISSN 1931-5244
    DOI 10.1016/j.trsl.2017.08.005
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Self-organized metabotyping of obese individuals identifies clusters responding differently to bariatric surgery.

    Lappa, Dimitra / Meijnikman, Abraham S / Krautkramer, Kimberly A / Olsson, Lisa M / Aydin, Ömrüm / Van Rijswijk, Anne-Sophie / Acherman, Yair I Z / De Brauw, Maurits L / Tremaroli, Valentina / Olofsson, Louise E / Lundqvist, Annika / Hjorth, Siv A / Ji, Boyang / Gerdes, Victor E A / Groen, Albert K / Schwartz, Thue W / Nieuwdorp, Max / Bäckhed, Fredrik / Nielsen, Jens

    PloS one

    2023  Volume 18, Issue 3, Page(s) e0279335

    Abstract: Weight loss through bariatric surgery is efficient for treatment or prevention of obesity related diseases such as type 2 diabetes and cardiovascular disease. Long term weight loss response does, however, vary among patients undergoing surgery. Thus, it ... ...

    Abstract Weight loss through bariatric surgery is efficient for treatment or prevention of obesity related diseases such as type 2 diabetes and cardiovascular disease. Long term weight loss response does, however, vary among patients undergoing surgery. Thus, it is difficult to identify predictive markers while most obese individuals have one or more comorbidities. To overcome such challenges, an in-depth multiple omics analyses including fasting peripheral plasma metabolome, fecal metagenome as well as liver, jejunum, and adipose tissue transcriptome were performed for 106 individuals undergoing bariatric surgery. Machine leaning was applied to explore the metabolic differences in individuals and evaluate if metabolism-based patients' stratification is related to their weight loss responses to bariatric surgery. Using Self-Organizing Maps (SOMs) to analyze the plasma metabolome, we identified five distinct metabotypes, which were differentially enriched for KEGG pathways related to immune functions, fatty acid metabolism, protein-signaling, and obesity pathogenesis. The gut metagenome of the most heavily medicated metabotypes, treated simultaneously for multiple cardiometabolic comorbidities, was significantly enriched in Prevotella and Lactobacillus species. This unbiased stratification into SOM-defined metabotypes identified signatures for each metabolic phenotype and we found that the different metabotypes respond differently to bariatric surgery in terms of weight loss after 12 months. An integrative framework that utilizes SOMs and omics integration was developed for stratifying a heterogeneous bariatric surgery cohort. The multiple omics datasets described in this study reveal that the metabotypes are characterized by a concrete metabolic status and different responses in weight loss and adipose tissue reduction over time. Our study thus opens a path to enable patient stratification and hereby allow for improved clinical treatments.
    MeSH term(s) Humans ; Diabetes Mellitus, Type 2/surgery ; Obesity/surgery ; Bariatric Surgery ; Adipose Tissue ; Algorithms
    Language English
    Publishing date 2023-03-02
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2267670-3
    ISSN 1932-6203 ; 1932-6203
    ISSN (online) 1932-6203
    ISSN 1932-6203
    DOI 10.1371/journal.pone.0279335
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: A systems biology approach to study non-alcoholic fatty liver (NAFL) in women with obesity.

    Meijnikman, Abraham S / Lappa, Dimitra / Herrema, Hilde / Aydin, Omrum / Krautkramer, Kimberly A / Tremaroli, Valentina / Olofsson, Louise E / Lundqvist, Annika / Bruin, Sjoerd / Acherman, Yair / Verheij, Joanne / Hjorth, Siv / Gerdes, Victor E A / Schwartz, Thue W / Groen, Albert K / Bäckhed, Fredrik / Nielsen, Jens / Nieuwdorp, Max

    iScience

    2022  Volume 25, Issue 8, Page(s) 104828

    Abstract: Non-alcoholic fatty liver disease (NAFLD) is now the most frequent global chronic liver disease. Individuals with NAFLD exhibited an increased risk of all-cause mortality driven by extrahepatic cancers and liver and cardiovascular disease. Once the ... ...

    Abstract Non-alcoholic fatty liver disease (NAFLD) is now the most frequent global chronic liver disease. Individuals with NAFLD exhibited an increased risk of all-cause mortality driven by extrahepatic cancers and liver and cardiovascular disease. Once the disease is established, women have a higher risk of disease progression and worse outcome. It is therefore critical to deepen the current knowledge on the pathophysiology of NAFLD in women. Here, we used a systems biology approach to investigate the contribution of different organs to this disease. We analyzed transcriptomics profiles of liver and adipose tissues, fecal metagenomes, and plasma metabolomes of 55 women with and without NAFLD. We observed differences in metabolites, expression of human genes, and gut microbial features between the groups and revealed that there is substantial crosstalk between these different omics sets. Multi-omics analysis of individuals with NAFLD may provide novel strategies to study the pathophysiology of NAFLD in humans.
    Language English
    Publishing date 2022-08-05
    Publishing country United States
    Document type Journal Article
    ISSN 2589-0042
    ISSN (online) 2589-0042
    DOI 10.1016/j.isci.2022.104828
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Metabolic regulation of histone post-translational modifications.

    Fan, Jing / Krautkramer, Kimberly A / Feldman, Jessica L / Denu, John M

    ACS chemical biology

    2015  Volume 10, Issue 1, Page(s) 95–108

    Abstract: Histone post-translational modifications regulate transcription and other DNA-templated functions. This process is dynamically regulated by specific modifying enzymes whose activities require metabolites that either serve as cosubstrates or act as ... ...

    Abstract Histone post-translational modifications regulate transcription and other DNA-templated functions. This process is dynamically regulated by specific modifying enzymes whose activities require metabolites that either serve as cosubstrates or act as activators/inhibitors. Therefore, metabolism can influence histone modification by changing local concentrations of key metabolites. Physiologically, the epigenetic response to metabolism is important for nutrient sensing and environment adaption. In pathologic states, the connection between metabolism and histone modification mediates epigenetic abnormality in complex disease. In this review, we summarize recent studies of the molecular mechanisms involved in metabolic regulation of histone modifications and discuss their biological significance.
    MeSH term(s) Acetyl Coenzyme A/metabolism ; Acetylation ; Adaptation, Physiological/genetics ; Animals ; DNA Methylation ; Epigenesis, Genetic ; Histone Deacetylases/metabolism ; Histones/genetics ; Histones/metabolism ; Humans ; Neoplasms/metabolism ; Protein Processing, Post-Translational ; Transcription, Genetic
    Chemical Substances Histones ; Acetyl Coenzyme A (72-89-9) ; Histone Deacetylases (EC 3.5.1.98)
    Language English
    Publishing date 2015-01-16
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Review
    ISSN 1554-8937
    ISSN (online) 1554-8937
    DOI 10.1021/cb500846u
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Quantification of SAHA-Dependent Changes in Histone Modifications Using Data-Independent Acquisition Mass Spectrometry.

    Krautkramer, Kimberly A / Reiter, Lukas / Denu, John M / Dowell, James A

    Journal of proteome research

    2015  Volume 14, Issue 8, Page(s) 3252–3262

    Abstract: Histone post-translational modifications (PTMs) are important regulators of chromatin structure and gene expression. Quantitative analysis of histone PTMs by mass spectrometry remains extremely challenging due to the complex and combinatorial nature of ... ...

    Abstract Histone post-translational modifications (PTMs) are important regulators of chromatin structure and gene expression. Quantitative analysis of histone PTMs by mass spectrometry remains extremely challenging due to the complex and combinatorial nature of histone PTMs. The most commonly used mass spectrometry-based method for high-throughput histone PTM analysis is data-dependent acquisition (DDA). However, stochastic precursor selection and dependence on MS1 ions for quantification impede comprehensive interrogation of histone PTM states using DDA methods. To overcome these limitations, we utilized a data-independent acquisition (DIA) workflow that provides superior run-to-run consistency and postacquisition flexibility in comparison to DDA methods. In addition, we developed a novel DIA-based methodology to quantify isobaric, co-eluting histone peptides that lack unique MS2 transitions. Our method enabled deconvolution and quantification of histone PTMs that are otherwise refractory to quantitation, including the heavily acetylated tail of histone H4. Using this workflow, we investigated the effects of the histone deacetylase inhibitor SAHA (suberoylanilide hydroxamic acid) on the global histone PTM state of human breast cancer MCF7 cells. A total of 62 unique histone PTMs were quantified, revealing novel SAHA-induced changes in acetylation and methylation of histones H3 and H4.
    MeSH term(s) Acetylation/drug effects ; Amino Acid Sequence ; Blotting, Western ; Chromatography, Liquid ; Histone Code/drug effects ; Histone Deacetylase Inhibitors/pharmacology ; Histones/metabolism ; Humans ; Hydroxamic Acids/pharmacology ; MCF-7 Cells ; Mass Spectrometry/methods ; Methylation/drug effects ; Molecular Sequence Data ; Peptides/metabolism ; Protein Processing, Post-Translational/drug effects ; Proteomics/methods ; Reproducibility of Results ; Spectrometry, Mass, Electrospray Ionization ; Tandem Mass Spectrometry
    Chemical Substances Histone Deacetylase Inhibitors ; Histones ; Hydroxamic Acids ; Peptides ; vorinostat (58IFB293JI)
    Language English
    Publishing date 2015-08-07
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 2078618-9
    ISSN 1535-3907 ; 1535-3893
    ISSN (online) 1535-3907
    ISSN 1535-3893
    DOI 10.1021/acs.jproteome.5b00245
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Self-organized metabotyping of obese individuals identifies clusters responding differently to bariatric surgery

    Dimitra Lappa / Abraham S. Meijnikman / Kimberly A. Krautkramer / Lisa M. Olsson / Ömrüm Aydin / Anne-Sophie Van Rijswijk / Yair I. Z. Acherman / Maurits L. De Brauw / Valentina Tremaroli / Louise E. Olofsson / Annika Lundqvist / Siv A. Hjorth / Boyang Ji / Victor E. A. Gerdes / Albert K. Groen / Thue W. Schwartz / Max Nieuwdorp / Fredrik Bäckhed / Jens Nielsen

    PLoS ONE, Vol 18, Iss

    2023  Volume 3

    Abstract: Weight loss through bariatric surgery is efficient for treatment or prevention of obesity related diseases such as type 2 diabetes and cardiovascular disease. Long term weight loss response does, however, vary among patients undergoing surgery. Thus, it ... ...

    Abstract Weight loss through bariatric surgery is efficient for treatment or prevention of obesity related diseases such as type 2 diabetes and cardiovascular disease. Long term weight loss response does, however, vary among patients undergoing surgery. Thus, it is difficult to identify predictive markers while most obese individuals have one or more comorbidities. To overcome such challenges, an in-depth multiple omics analyses including fasting peripheral plasma metabolome, fecal metagenome as well as liver, jejunum, and adipose tissue transcriptome were performed for 106 individuals undergoing bariatric surgery. Machine leaning was applied to explore the metabolic differences in individuals and evaluate if metabolism-based patients’ stratification is related to their weight loss responses to bariatric surgery. Using Self-Organizing Maps (SOMs) to analyze the plasma metabolome, we identified five distinct metabotypes, which were differentially enriched for KEGG pathways related to immune functions, fatty acid metabolism, protein-signaling, and obesity pathogenesis. The gut metagenome of the most heavily medicated metabotypes, treated simultaneously for multiple cardiometabolic comorbidities, was significantly enriched in Prevotella and Lactobacillus species. This unbiased stratification into SOM-defined metabotypes identified signatures for each metabolic phenotype and we found that the different metabotypes respond differently to bariatric surgery in terms of weight loss after 12 months. An integrative framework that utilizes SOMs and omics integration was developed for stratifying a heterogeneous bariatric surgery cohort. The multiple omics datasets described in this study reveal that the metabotypes are characterized by a concrete metabolic status and different responses in weight loss and adipose tissue reduction over time. Our study thus opens a path to enable patient stratification and hereby allow for improved clinical treatments.
    Keywords Medicine ; R ; Science ; Q
    Subject code 610
    Language English
    Publishing date 2023-01-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: Self-organized metabotyping of obese individuals identifies clusters responding differently to bariatric surgery.

    Dimitra Lappa / Abraham S Meijnikman / Kimberly A Krautkramer / Lisa M Olsson / Ömrüm Aydin / Anne-Sophie Van Rijswijk / Yair I Z Acherman / Maurits L De Brauw / Valentina Tremaroli / Louise E Olofsson / Annika Lundqvist / Siv A Hjorth / Boyang Ji / Victor E A Gerdes / Albert K Groen / Thue W Schwartz / Max Nieuwdorp / Fredrik Bäckhed / Jens Nielsen

    PLoS ONE, Vol 18, Iss 3, p e

    2023  Volume 0279335

    Abstract: Weight loss through bariatric surgery is efficient for treatment or prevention of obesity related diseases such as type 2 diabetes and cardiovascular disease. Long term weight loss response does, however, vary among patients undergoing surgery. Thus, it ... ...

    Abstract Weight loss through bariatric surgery is efficient for treatment or prevention of obesity related diseases such as type 2 diabetes and cardiovascular disease. Long term weight loss response does, however, vary among patients undergoing surgery. Thus, it is difficult to identify predictive markers while most obese individuals have one or more comorbidities. To overcome such challenges, an in-depth multiple omics analyses including fasting peripheral plasma metabolome, fecal metagenome as well as liver, jejunum, and adipose tissue transcriptome were performed for 106 individuals undergoing bariatric surgery. Machine leaning was applied to explore the metabolic differences in individuals and evaluate if metabolism-based patients' stratification is related to their weight loss responses to bariatric surgery. Using Self-Organizing Maps (SOMs) to analyze the plasma metabolome, we identified five distinct metabotypes, which were differentially enriched for KEGG pathways related to immune functions, fatty acid metabolism, protein-signaling, and obesity pathogenesis. The gut metagenome of the most heavily medicated metabotypes, treated simultaneously for multiple cardiometabolic comorbidities, was significantly enriched in Prevotella and Lactobacillus species. This unbiased stratification into SOM-defined metabotypes identified signatures for each metabolic phenotype and we found that the different metabotypes respond differently to bariatric surgery in terms of weight loss after 12 months. An integrative framework that utilizes SOMs and omics integration was developed for stratifying a heterogeneous bariatric surgery cohort. The multiple omics datasets described in this study reveal that the metabotypes are characterized by a concrete metabolic status and different responses in weight loss and adipose tissue reduction over time. Our study thus opens a path to enable patient stratification and hereby allow for improved clinical treatments.
    Keywords Medicine ; R ; Science ; Q
    Subject code 610
    Language English
    Publishing date 2023-01-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Iron Deprivation Induces Transcriptional Regulation of Mitochondrial Biogenesis.

    Rensvold, Jarred W / Krautkramer, Kimberly A / Dowell, James A / Denu, John M / Pagliarini, David J

    The Journal of biological chemistry

    2016  Volume 291, Issue 40, Page(s) 20827–20837

    Abstract: Mitochondria are essential organelles that adapt to stress and environmental changes. Among the nutrient signals that affect mitochondrial form and function is iron, whose depletion initiates a rapid and reversible decrease in mitochondrial biogenesis ... ...

    Abstract Mitochondria are essential organelles that adapt to stress and environmental changes. Among the nutrient signals that affect mitochondrial form and function is iron, whose depletion initiates a rapid and reversible decrease in mitochondrial biogenesis through unclear means. Here we demonstrate that, unlike the canonical iron-induced alterations to transcript stability, loss of iron dampens the transcription of genes encoding mitochondrial proteins with no change to transcript half-life. Using mass spectrometry, we demonstrate that these transcriptional changes are accompanied by dynamic alterations to histone acetylation and methylation levels that are largely reversible upon readministration of iron. Moreover, histone deacetylase inhibition abrogates the decreased histone acetylation observed upon iron deprivation and restores normal transcript levels at genes encoding mitochondrial proteins. Collectively, we demonstrate that deprivation of an essential nutrient induces transcriptional repression of organellar biogenesis involving epigenetic alterations.
    MeSH term(s) Acetylation ; Animals ; Epigenesis, Genetic ; Histones/metabolism ; Iron Deficiencies ; Mice ; Mitochondria, Muscle/metabolism ; Mitochondrial Proteins/biosynthesis ; Transcription, Genetic
    Chemical Substances Histones ; Mitochondrial Proteins
    Language English
    Publishing date 2016-08-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2997-x
    ISSN 1083-351X ; 0021-9258
    ISSN (online) 1083-351X
    ISSN 0021-9258
    DOI 10.1074/jbc.M116.727701
    Database MEDical Literature Analysis and Retrieval System OnLINE

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