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  1. Article ; Online: Marker-based assays for studying gut transit in gnotobiotic and conventional mouse models.

    Koester, Sean T / Li, Naisi / Lachance, Daniel M / Dey, Neelendu

    STAR protocols

    2021  Volume 2, Issue 4, Page(s) 100938

    Abstract: Gastrointestinal motility is regulated by a variety of environmental factors including gut microbes and metabolites. The ability to interrogate mouse models of gut motility has enabled elucidation of these relationships. Here we describe integration of ... ...

    Abstract Gastrointestinal motility is regulated by a variety of environmental factors including gut microbes and metabolites. The ability to interrogate mouse models of gut motility has enabled elucidation of these relationships. Here we describe integration of the red carmine dye and fluorescence isothiocyanate-dextran marker-based assays for characterizing gut transit with spatial resolution, along with an optional intracolonic infusion protocol for studying the effects of metabolites on colonic transit. These protocols can be adapted for use in gnotobiotic and conventional mouse models. For complete details on the use and execution of this protocol, please refer to Li et al. (2021).
    MeSH term(s) Animals ; Biomarkers/metabolism ; Disease Models, Animal ; Feces/chemistry ; Female ; Gastrointestinal Tract/chemistry ; Gastrointestinal Tract/metabolism ; Gastrointestinal Transit/physiology ; Germ-Free Life ; Male ; Mice
    Chemical Substances Biomarkers
    Language English
    Publishing date 2021-11-05
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ISSN 2666-1667
    ISSN (online) 2666-1667
    DOI 10.1016/j.xpro.2021.100938
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Marker-based assays for studying gut transit in gnotobiotic and conventional mouse models

    Sean T. Koester / Naisi Li / Daniel M. Lachance / Neelendu Dey

    STAR Protocols, Vol 2, Iss 4, Pp 100938- (2021)

    2021  

    Abstract: Summary: Gastrointestinal motility is regulated by a variety of environmental factors including gut microbes and metabolites. The ability to interrogate mouse models of gut motility has enabled elucidation of these relationships. Here we describe ... ...

    Abstract Summary: Gastrointestinal motility is regulated by a variety of environmental factors including gut microbes and metabolites. The ability to interrogate mouse models of gut motility has enabled elucidation of these relationships. Here we describe integration of the red carmine dye and fluorescence isothiocyanate-dextran marker-based assays for characterizing gut transit with spatial resolution, along with an optional intracolonic infusion protocol for studying the effects of metabolites on colonic transit. These protocols can be adapted for use in gnotobiotic and conventional mouse models.For complete details on the use and execution of this protocol, please refer to Li et al. (2021).
    Keywords Microbiology ; Model Organisms ; Science (General) ; Q1-390
    Language English
    Publishing date 2021-12-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Microbiome-encoded bile acid metabolism modulates colonic transit times.

    Li, Naisi / Koester, Sean T / Lachance, Daniel M / Dutta, Moumita / Cui, Julia Yue / Dey, Neelendu

    iScience

    2021  Volume 24, Issue 6, Page(s) 102508

    Abstract: Gut motility is regulated by the microbiome via mechanisms that include bile acid metabolism. To localize the effects of microbiome-generated bile acids, we colonized gnotobiotic mice with different synthetic gut bacterial communities that were ... ...

    Abstract Gut motility is regulated by the microbiome via mechanisms that include bile acid metabolism. To localize the effects of microbiome-generated bile acids, we colonized gnotobiotic mice with different synthetic gut bacterial communities that were metabolically phenotyped using a functional
    Language English
    Publishing date 2021-05-05
    Publishing country United States
    Document type Journal Article
    ISSN 2589-0042
    ISSN (online) 2589-0042
    DOI 10.1016/j.isci.2021.102508
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Variability in digestive and respiratory tract Ace2 expression is associated with the microbiome.

    Koester, Sean T / Li, Naisi / Lachance, Daniel M / Morella, Norma M / Dey, Neelendu

    PloS one

    2021  Volume 16, Issue 3, Page(s) e0248730

    Abstract: COVID-19 (coronavirus disease 2019) patients exhibiting gastrointestinal symptoms are reported to have worse prognosis. Ace2 (angiotensin-converting enzyme 2), the gene encoding the host protein to which SARS-CoV-2 spike proteins bind, is expressed in ... ...

    Abstract COVID-19 (coronavirus disease 2019) patients exhibiting gastrointestinal symptoms are reported to have worse prognosis. Ace2 (angiotensin-converting enzyme 2), the gene encoding the host protein to which SARS-CoV-2 spike proteins bind, is expressed in the gut and therefore may be a target for preventing or reducing severity of COVID-19. Here we test the hypothesis that Ace2 expression in the gastrointestinal and respiratory tracts is modulated by the microbiome. We used quantitative PCR to profile Ace2 expression in germ-free mice, conventional raised specific pathogen-free mice, and gnotobiotic mice colonized with different microbiota. Intestinal Ace2 expression levels were significantly higher in germ-free mice compared to conventional mice. A similar trend was observed in the respiratory tract. Intriguingly, microbiota depletion via antibiotics partially recapitulated the germ-free phenotype, suggesting potential for microbiome-mediated regulation of Ace2 expression. Variability in intestinal Ace2 expression was observed in gnotobiotic mice colonized with different microbiota, partially attributable to differences in microbiome-encoded proteases and peptidases. Together, these data suggest that the microbiome may be one modifiable factor determining COVID-19 infection risk and disease severity.
    MeSH term(s) Adenomatous Polyposis Coli Protein/deficiency ; Adenomatous Polyposis Coli Protein/genetics ; Angiotensin-Converting Enzyme 2/genetics ; Angiotensin-Converting Enzyme 2/metabolism ; Animals ; Colon/enzymology ; Female ; Gastrointestinal Microbiome ; Gene Expression ; Interleukin-10/deficiency ; Interleukin-10/genetics ; Intestine, Small/enzymology ; Lung/enzymology ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Knockout
    Chemical Substances Adenomatous Polyposis Coli Protein ; adenomatous polyposis coli protein, mouse ; Interleukin-10 (130068-27-8) ; Ace2 protein, mouse (EC 3.4.17.23) ; Angiotensin-Converting Enzyme 2 (EC 3.4.17.23)
    Language English
    Publishing date 2021-03-16
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ISSN 1932-6203
    ISSN (online) 1932-6203
    DOI 10.1371/journal.pone.0248730
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Variability in digestive and respiratory tract Ace2 expression is associated with the microbiome.

    Sean T Koester / Naisi Li / Daniel M Lachance / Norma M Morella / Neelendu Dey

    PLoS ONE, Vol 16, Iss 3, p e

    2021  Volume 0248730

    Abstract: COVID-19 (coronavirus disease 2019) patients exhibiting gastrointestinal symptoms are reported to have worse prognosis. Ace2 (angiotensin-converting enzyme 2), the gene encoding the host protein to which SARS-CoV-2 spike proteins bind, is expressed in ... ...

    Abstract COVID-19 (coronavirus disease 2019) patients exhibiting gastrointestinal symptoms are reported to have worse prognosis. Ace2 (angiotensin-converting enzyme 2), the gene encoding the host protein to which SARS-CoV-2 spike proteins bind, is expressed in the gut and therefore may be a target for preventing or reducing severity of COVID-19. Here we test the hypothesis that Ace2 expression in the gastrointestinal and respiratory tracts is modulated by the microbiome. We used quantitative PCR to profile Ace2 expression in germ-free mice, conventional raised specific pathogen-free mice, and gnotobiotic mice colonized with different microbiota. Intestinal Ace2 expression levels were significantly higher in germ-free mice compared to conventional mice. A similar trend was observed in the respiratory tract. Intriguingly, microbiota depletion via antibiotics partially recapitulated the germ-free phenotype, suggesting potential for microbiome-mediated regulation of Ace2 expression. Variability in intestinal Ace2 expression was observed in gnotobiotic mice colonized with different microbiota, partially attributable to differences in microbiome-encoded proteases and peptidases. Together, these data suggest that the microbiome may be one modifiable factor determining COVID-19 infection risk and disease severity.
    Keywords Medicine ; R ; Science ; Q
    Subject code 570
    Language English
    Publishing date 2021-01-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Microbiome-encoded bile acid metabolism modulates colonic transit times

    Naisi Li / Sean T. Koester / Daniel M. Lachance / Moumita Dutta / Julia Yue Cui / Neelendu Dey

    iScience, Vol 24, Iss 6, Pp 102508- (2021)

    2021  

    Abstract: Summary: Gut motility is regulated by the microbiome via mechanisms that include bile acid metabolism. To localize the effects of microbiome-generated bile acids, we colonized gnotobiotic mice with different synthetic gut bacterial communities that were ... ...

    Abstract Summary: Gut motility is regulated by the microbiome via mechanisms that include bile acid metabolism. To localize the effects of microbiome-generated bile acids, we colonized gnotobiotic mice with different synthetic gut bacterial communities that were metabolically phenotyped using a functional in vitro screen. Using two different marker-based assays of gut transit, we inferred that bile acids exert effects on colonic transit. We validated this using an intra-colonic bile acid infusion assay and determined that these effects were dependent upon signaling via the bile acid receptor, TGR5. The intra-colonic bile acid infusion experiments further revealed sex-biased bile acid-specific effects on colonic transit, with lithocholic acid having the largest pro-motility effect. Transcriptional responses of the enteric nervous system (ENS) were stereotypic, regional, and observed in response to different microbiota, their associated bile acid profiles, and even to a single diet ingredient, evidencing exquisite sensitivity of the ENS to environmental perturbations.
    Keywords Microbiology ; Microbiome ; Gastroenterology ; Science ; Q
    Language English
    Publishing date 2021-06-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Chemical Purification of Terbium-155 from Pseudo-Isobaric Impurities in a Mass Separated Source Produced at CERN.

    Webster, Ben / Ivanov, Peter / Russell, Ben / Collins, Sean / Stora, Thierry / Ramos, Joao Pedro / Köster, Ulli / Robinson, Andrew Paul / Read, David

    Scientific reports

    2019  Volume 9, Issue 1, Page(s) 10884

    Abstract: Four terbium radioisotopes ( ...

    Abstract Four terbium radioisotopes (
    Language English
    Publishing date 2019-07-26
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-019-47463-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Reproducible, interactive, scalable and extensible microbiome data science using QIIME 2.

    Bolyen, Evan / Rideout, Jai Ram / Dillon, Matthew R / Bokulich, Nicholas A / Abnet, Christian C / Al-Ghalith, Gabriel A / Alexander, Harriet / Alm, Eric J / Arumugam, Manimozhiyan / Asnicar, Francesco / Bai, Yang / Bisanz, Jordan E / Bittinger, Kyle / Brejnrod, Asker / Brislawn, Colin J / Brown, C Titus / Callahan, Benjamin J / Caraballo-Rodríguez, Andrés Mauricio / Chase, John /
    Cope, Emily K / Da Silva, Ricardo / Diener, Christian / Dorrestein, Pieter C / Douglas, Gavin M / Durall, Daniel M / Duvallet, Claire / Edwardson, Christian F / Ernst, Madeleine / Estaki, Mehrbod / Fouquier, Jennifer / Gauglitz, Julia M / Gibbons, Sean M / Gibson, Deanna L / Gonzalez, Antonio / Gorlick, Kestrel / Guo, Jiarong / Hillmann, Benjamin / Holmes, Susan / Holste, Hannes / Huttenhower, Curtis / Huttley, Gavin A / Janssen, Stefan / Jarmusch, Alan K / Jiang, Lingjing / Kaehler, Benjamin D / Kang, Kyo Bin / Keefe, Christopher R / Keim, Paul / Kelley, Scott T / Knights, Dan / Koester, Irina / Kosciolek, Tomasz / Kreps, Jorden / Langille, Morgan G I / Lee, Joslynn / Ley, Ruth / Liu, Yong-Xin / Loftfield, Erikka / Lozupone, Catherine / Maher, Massoud / Marotz, Clarisse / Martin, Bryan D / McDonald, Daniel / McIver, Lauren J / Melnik, Alexey V / Metcalf, Jessica L / Morgan, Sydney C / Morton, Jamie T / Naimey, Ahmad Turan / Navas-Molina, Jose A / Nothias, Louis Felix / Orchanian, Stephanie B / Pearson, Talima / Peoples, Samuel L / Petras, Daniel / Preuss, Mary Lai / Pruesse, Elmar / Rasmussen, Lasse Buur / Rivers, Adam / Robeson, Michael S / Rosenthal, Patrick / Segata, Nicola / Shaffer, Michael / Shiffer, Arron / Sinha, Rashmi / Song, Se Jin / Spear, John R / Swafford, Austin D / Thompson, Luke R / Torres, Pedro J / Trinh, Pauline / Tripathi, Anupriya / Turnbaugh, Peter J / Ul-Hasan, Sabah / van der Hooft, Justin J J / Vargas, Fernando / Vázquez-Baeza, Yoshiki / Vogtmann, Emily / von Hippel, Max / Walters, William / Wan, Yunhu / Wang, Mingxun / Warren, Jonathan / Weber, Kyle C / Williamson, Charles H D / Willis, Amy D / Xu, Zhenjiang Zech / Zaneveld, Jesse R / Zhang, Yilong / Zhu, Qiyun / Knight, Rob / Caporaso, J Gregory

    Nature biotechnology

    2019  Volume 37, Issue 8, Page(s) 852–857

    MeSH term(s) Computational Biology ; Data Science ; Databases, Factual ; Humans ; Microbiota ; Software
    Language English
    Publishing date 2019-10-15
    Publishing country United States
    Document type Letter ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 1311932-1
    ISSN 1546-1696 ; 1087-0156
    ISSN (online) 1546-1696
    ISSN 1087-0156
    DOI 10.1038/s41587-019-0209-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Author Correction: Reproducible, interactive, scalable and extensible microbiome data science using QIIME 2.

    Bolyen, Evan / Rideout, Jai Ram / Dillon, Matthew R / Bokulich, Nicholas A / Abnet, Christian C / Al-Ghalith, Gabriel A / Alexander, Harriet / Alm, Eric J / Arumugam, Manimozhiyan / Asnicar, Francesco / Bai, Yang / Bisanz, Jordan E / Bittinger, Kyle / Brejnrod, Asker / Brislawn, Colin J / Brown, C Titus / Callahan, Benjamin J / Caraballo-Rodríguez, Andrés Mauricio / Chase, John /
    Cope, Emily K / Da Silva, Ricardo / Diener, Christian / Dorrestein, Pieter C / Douglas, Gavin M / Durall, Daniel M / Duvallet, Claire / Edwardson, Christian F / Ernst, Madeleine / Estaki, Mehrbod / Fouquier, Jennifer / Gauglitz, Julia M / Gibbons, Sean M / Gibson, Deanna L / Gonzalez, Antonio / Gorlick, Kestrel / Guo, Jiarong / Hillmann, Benjamin / Holmes, Susan / Holste, Hannes / Huttenhower, Curtis / Huttley, Gavin A / Janssen, Stefan / Jarmusch, Alan K / Jiang, Lingjing / Kaehler, Benjamin D / Kang, Kyo Bin / Keefe, Christopher R / Keim, Paul / Kelley, Scott T / Knights, Dan / Koester, Irina / Kosciolek, Tomasz / Kreps, Jorden / Langille, Morgan G I / Lee, Joslynn / Ley, Ruth / Liu, Yong-Xin / Loftfield, Erikka / Lozupone, Catherine / Maher, Massoud / Marotz, Clarisse / Martin, Bryan D / McDonald, Daniel / McIver, Lauren J / Melnik, Alexey V / Metcalf, Jessica L / Morgan, Sydney C / Morton, Jamie T / Naimey, Ahmad Turan / Navas-Molina, Jose A / Nothias, Louis Felix / Orchanian, Stephanie B / Pearson, Talima / Peoples, Samuel L / Petras, Daniel / Preuss, Mary Lai / Pruesse, Elmar / Rasmussen, Lasse Buur / Rivers, Adam / Robeson, Michael S / Rosenthal, Patrick / Segata, Nicola / Shaffer, Michael / Shiffer, Arron / Sinha, Rashmi / Song, Se Jin / Spear, John R / Swafford, Austin D / Thompson, Luke R / Torres, Pedro J / Trinh, Pauline / Tripathi, Anupriya / Turnbaugh, Peter J / Ul-Hasan, Sabah / van der Hooft, Justin J J / Vargas, Fernando / Vázquez-Baeza, Yoshiki / Vogtmann, Emily / von Hippel, Max / Walters, William / Wan, Yunhu / Wang, Mingxun / Warren, Jonathan / Weber, Kyle C / Williamson, Charles H D / Willis, Amy D / Xu, Zhenjiang Zech / Zaneveld, Jesse R / Zhang, Yilong / Zhu, Qiyun / Knight, Rob / Caporaso, J Gregory

    Nature biotechnology

    2019  Volume 37, Issue 9, Page(s) 1091

    Abstract: An amendment to this paper has been published and can be accessed via a link at the top of the paper. ...

    Abstract An amendment to this paper has been published and can be accessed via a link at the top of the paper.
    Language English
    Publishing date 2019-08-13
    Publishing country United States
    Document type Published Erratum
    ZDB-ID 1311932-1
    ISSN 1546-1696 ; 1087-0156
    ISSN (online) 1546-1696
    ISSN 1087-0156
    DOI 10.1038/s41587-019-0252-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Reproducible, interactive, scalable and extensible microbiome data science using QIIME 2

    Bolyen, Evan / Rideout, Jai Ram / Dillon, Matthew R. / Bokulich, Nicholas A. / Abnet, Christian C. / Al-Ghalith, Gabriel A. / Alexander, Harriet / Alm, Eric J. / Arumugam, Manimozhiyan / Asnicar, Francesco / Bai, Yang / Bisanz, Jordan E. / Bittinger, Kyle / Brejnrod, Asker / Brislawn, Colin J. / Brown, Titus C. / Callahan, Benjamin J. / Caraballo-Rodríguez, Andrés Mauricio / Chase, John /
    Cope, Emily K. / da Silva, Ricardo / Diener, Christian / Dorrestein, Pieter C. / Douglas, Gavin M. / Durall, Daniel M. / Duvallet, Claire / Edwardson, Christian F. / Ernst, Madeleine / Estaki, Mehrbod / Fouquier, Jennifer / Gauglitz, Julia M. / Gibbons, Sean M. / Gibson, Deanna L. / Gonzalez, Antonio / Gorlick, Kestrel / Guo, Jiarong / Hillmann, Benjamin / Holmes, Susan / Holste, Hannes / Huttenhower, Curtis / Huttley, Gavin A. / Janssen, Stefan / Jarmusch, Alan K. / Jiang, Lingjing / Kaehler, Benjamin D. / Kang, Kyo Bin / Keefe, Christopher R. / Keim, Paul / Kelley, Scott T. / Knights, Dan / Koester, Irina / Kosciolek, Tomasz / Kreps, Jorden / Langille, Morgan G.I. / Lee, Joslynn / Ley, Ruth / Liu, Yong Xin / Loftfield, Erikka / Lozupone, Catherine / Maher, Massoud / Marotz, Clarisse / Martin, Bryan D. / McDonald, Daniel / McIver, Lauren J. / Melnik, Alexey V. / Metcalf, Jessica L. / Morgan, Sydney C. / Morton, Jamie T. / Naimey, Ahmad Turan / Navas-Molina, Jose A. / Nothias, Louis Felix / Orchanian, Stephanie B. / Pearson, Talima / Peoples, Samuel L. / Petras, Daniel / Preuss, Mary Lai / Pruesse, Elmar / Rasmussen, Lasse Buur / Rivers, Adam / Robeson, Michael S. / Rosenthal, Patrick / Segata, Nicola / Shaffer, Michael / Shiffer, Arron / Sinha, Rashmi / Song, Se Jin / Spear, John R. / Swafford, Austin D. / Thompson, Luke R. / Torres, Pedro J. / Trinh, Pauline / Tripathi, Anupriya / Turnbaugh, Peter J. / Ul-Hasan, Sabah / van der Hooft, Justin J.J. / Vargas, Fernando / Vázquez-Baeza, Yoshiki / Vogtmann, Emily / von Hippel, Max / Walters, William / Wan, Yunhu / Wang, Mingxun / Warren, Jonathan / Weber, Kyle C. / Williamson, Charles H.D. / Willis, Amy D. / Xu, Zhenjiang Zech / Zaneveld, Jesse R. / Zhang, Yilong / Zhu, Qiyun / Knight, Rob / Caporaso, J.G.

    Nature Biotechnology

    2019  Volume 37, Issue 8

    Keywords Life Science
    Language English
    Publishing country nl
    Document type Article ; Online
    ZDB-ID 1311932-1
    ISSN 1546-1696 ; 1087-0156
    ISSN (online) 1546-1696
    ISSN 1087-0156
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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