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Chibuye M, Mende DR, Spijker R, Simuyandi M, Luchen CC, Bosomprah S, Chilengi R, Schultsz C, Harris VC. Systematic review of associations between gut microbiome composition and stunting in under-five children. NPJ Biofilms Microbiomes 2024; 10:46. [PMID: 38782939 PMCID: PMC11116508 DOI: 10.1038/s41522-024-00517-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 04/29/2024] [Indexed: 05/25/2024] Open
Abstract
Childhood stunting is associated with impaired cognitive development and increased risk of infections, morbidity, and mortality. The composition of the enteric microbiota may contribute to the pathogenesis of stunting. We systematically reviewed and synthesized data from studies using high-throughput genomic sequencing methods to characterize the gut microbiome in stunted versus non-stunted children under 5 years in LMICs. We included 14 studies from Asia, Africa, and South America. Most studies did not report any significant differences in the alpha diversity, while a significantly higher beta diversity was observed in stunted children in four out of seven studies that reported beta diversity. At the phylum level, inconsistent associations with stunting were observed for Bacillota, Pseudomonadota, and Bacteroidota phyla. No single genus was associated with stunted children across all 14 studies, and some associations were incongruent by specific genera. Nonetheless, stunting was associated with an abundance of pathobionts that could drive inflammation, such as Escherichia/Shigella and Campylobacter, and a reduction of butyrate producers, including Faecalibacterium, Megasphera, Blautia, and increased Ruminoccoccus. An abundance of taxa thought to originate in the oropharynx was also reported in duodenal and fecal samples of stunted children, while metabolic pathways, including purine and pyrimidine biosynthesis, vitamin B biosynthesis, and carbohydrate and amino acid degradation pathways, predicted linear growth. Current studies show that stunted children can have distinct microbial patterns compared to non-stunted children, which could contribute to the pathogenesis of stunting.
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Affiliation(s)
- Mwelwa Chibuye
- Department of Global Health, Amsterdam Institute for Global Health and Development (AIGHD), Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
- Research Division, Centre for Infectious Disease Research in Zambia, Lusaka, Zambia
- Amsterdam Institute of Infection and Immunity, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Daniel R Mende
- Amsterdam Institute of Infection and Immunity, Amsterdam University Medical Centers, Amsterdam, The Netherlands
- Department of Medical Microbiology and Infection Control, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Rene Spijker
- Department of Global Health, Amsterdam Institute for Global Health and Development (AIGHD), Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Michelo Simuyandi
- Research Division, Centre for Infectious Disease Research in Zambia, Lusaka, Zambia
| | - Chaluma C Luchen
- Department of Global Health, Amsterdam Institute for Global Health and Development (AIGHD), Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
- Research Division, Centre for Infectious Disease Research in Zambia, Lusaka, Zambia
| | - Samuel Bosomprah
- Research Division, Centre for Infectious Disease Research in Zambia, Lusaka, Zambia
- Department of Biostatistics, School of Public Health, University of Ghana, Legon, Accra, Ghana
| | - Roma Chilengi
- Research Division, Centre for Infectious Disease Research in Zambia, Lusaka, Zambia
- The Zambia National Public Health Institute (ZNPHI), Lusaka, Zambia
| | - Constance Schultsz
- Department of Global Health, Amsterdam Institute for Global Health and Development (AIGHD), Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
- Amsterdam Institute of Infection and Immunity, Amsterdam University Medical Centers, Amsterdam, The Netherlands
- Department of Medical Microbiology and Infection Control, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Vanessa C Harris
- Department of Global Health, Amsterdam Institute for Global Health and Development (AIGHD), Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands.
- Amsterdam Institute of Infection and Immunity, Amsterdam University Medical Centers, Amsterdam, The Netherlands.
- Division of Infectious Diseases, Department of Internal Medicine, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands.
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2
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Zakaria FR, Chen CY, Li J, Wang S, Payne GF, Bentley WE. Redox active plant phenolic, acetosyringone, for electrogenetic signaling. Sci Rep 2024; 14:9666. [PMID: 38671069 PMCID: PMC11053109 DOI: 10.1038/s41598-024-60191-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 04/19/2024] [Indexed: 04/28/2024] Open
Abstract
Redox is a unique, programmable modality capable of bridging communication between biology and electronics. Previous studies have shown that the E. coli redox-responsive OxyRS regulon can be re-wired to accept electrochemically generated hydrogen peroxide (H2O2) as an inducer of gene expression. Here we report that the redox-active phenolic plant signaling molecule acetosyringone (AS) can also induce gene expression from the OxyRS regulon. AS must be oxidized, however, as the reduced state present under normal conditions cannot induce gene expression. Thus, AS serves as a "pro-signaling molecule" that can be activated by its oxidation-in our case by application of oxidizing potential to an electrode. We show that the OxyRS regulon is not induced electrochemically if the imposed electrode potential is in the mid-physiological range. Electronically sliding the applied potential to either oxidative or reductive extremes induces this regulon but through different mechanisms: reduction of O2 to form H2O2 or oxidation of AS. Fundamentally, this work reinforces the emerging concept that redox signaling depends more on molecular activities than molecular structure. From an applications perspective, the creation of an electronically programmed "pro-signal" dramatically expands the toolbox for electronic control of biological responses in microbes, including in complex environments, cell-based materials, and biomanufacturing.
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Affiliation(s)
- Fauziah Rahma Zakaria
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, USA
- Institute for Bioscience and Biotechnology Research, Rockville, MD, USA
- Robert E. Fischell Institute for Biomedical Devices, University of Maryland, College Park, MD, USA
| | - Chen-Yu Chen
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, USA
- Institute for Bioscience and Biotechnology Research, Rockville, MD, USA
- Robert E. Fischell Institute for Biomedical Devices, University of Maryland, College Park, MD, USA
| | - Jinyang Li
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, USA
- Institute for Bioscience and Biotechnology Research, Rockville, MD, USA
- Robert E. Fischell Institute for Biomedical Devices, University of Maryland, College Park, MD, USA
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Sally Wang
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, USA
- Institute for Bioscience and Biotechnology Research, Rockville, MD, USA
- Robert E. Fischell Institute for Biomedical Devices, University of Maryland, College Park, MD, USA
| | - Gregory F Payne
- Institute for Bioscience and Biotechnology Research, Rockville, MD, USA.
- Robert E. Fischell Institute for Biomedical Devices, University of Maryland, College Park, MD, USA.
| | - William E Bentley
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, USA.
- Institute for Bioscience and Biotechnology Research, Rockville, MD, USA.
- Robert E. Fischell Institute for Biomedical Devices, University of Maryland, College Park, MD, USA.
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3
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Li J, Huang G, Wang J, Wang S, Yu Y. Hydrogen Regulates Ulcerative Colitis by Affecting the Intestinal Redox Environment. J Inflamm Res 2024; 17:933-945. [PMID: 38370464 PMCID: PMC10871146 DOI: 10.2147/jir.s445152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 01/23/2024] [Indexed: 02/20/2024] Open
Abstract
The redox balance in the intestine plays an important role in maintaining intestinal homeostasis, and it is closely related to the intestinal mucosal barrier, intestinal inflammation, and the gut microbiota. Current research on the treatment of ulcerative colitis has focused on immune disorders, excessive inflammation, and oxidative stress. However, an imbalance in intestinal redox reaction plays a particularly critical role. Hydrogen is produced by some anaerobic bacteria via hydrogenases in the intestine. Increasing evidence suggests that hydrogen, as an inert gas, is crucial for immunity, inflammation, and oxidative stress and plays a protective role in ulcerative colitis. Hydrogen maintains the redox state balance in the intestine in ulcerative colitis and reduces damage to intestinal epithelial cells by exerting its selective antioxidant ability. Hydrogen also regulates the intestinal flora, reduces the harmful effects of bacteria on the intestinal epithelial barrier, promotes the restoration of normal anaerobic bacteria in the intestines, and ultimately improves the integrity of the intestinal epithelial barrier. The present review focuses on the therapeutic mechanisms of hydrogen-targeting ulcerative colitis.
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Affiliation(s)
- Jiayi Li
- Department of Gastroenterology, Qilu Hospital, Shandong University, Jinan, Shandong, People’s Republic of China
| | - Gang Huang
- Department of Gastroenterology, Qilu Hospital, Shandong University, Jinan, Shandong, People’s Republic of China
| | - Juexin Wang
- Department of Gastroenterology, Qilu Hospital, Shandong University, Jinan, Shandong, People’s Republic of China
| | - Sui Wang
- Department of Gastroenterology, Qilu Hospital, Shandong University, Jinan, Shandong, People’s Republic of China
| | - Yanbo Yu
- Department of Gastroenterology, Qilu Hospital, Shandong University, Jinan, Shandong, People’s Republic of China
- Shandong Provincial Clinical Research Center for Digestive Disease, Qilu Hospital of Shandong University, Jinan, Shandong, People’s Republic of China
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4
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Fu ZL, Yang Y, Ma L, Malmuthuge N, Guan LL, Bu DP. Dynamics of oxidative stress and immune responses in neonatal calves during diarrhea. J Dairy Sci 2024; 107:1286-1298. [PMID: 37776998 DOI: 10.3168/jds.2023-23630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 09/08/2023] [Indexed: 10/02/2023]
Abstract
Oxidative stress is the imbalanced redox status between oxidant production and their scavengers leading to intestinal physiological dysfunction. However, the role of systemic and local oxidative status during neonatal calf diarrhea is not known. This study assessed systemic (serum) and local (fecal) oxidative status when calves either naturally developed diarrhea or naturally recovered. Healthy calves were enrolled in the study at d 18 of age, and their health status was monitored from the enrollment. Based on their enteric health status on d 21 and 28, calves were grouped as continuous diarrhea from d 21 to 28 (n = 14), diarrhea at d 21 but recovered at d 28 (DH group, n = 19), healthy at d 21 but developed diarrhea at d 28 (HD group, n = 15), and healthy throughout the study (HH group, n = 16). Serum and fecal samples were collected at d 21 and 28 from all calves in the morning 2 h after feeding. Dynamics of oxidative stress indicators including reactive oxygen species (ROS), malondialdehyde (MDA), H2O2, 8-hydroxy-2'-deoxyguanosine (8-OHDG), glutathione peroxidase, superoxide dismutase, catalase (CAT), and total antioxidant capacity and inflammatory indicators TNF-α, IL-1β, IL-4, IL-6, IL-10, and IFN-γ were evaluated using serum samples. In addition, fecal oxidative stress indicators ROS and MDA were measured. Serum ROS, MDA, 8-OHDG, as well as fecal ROS and MDA, were higher, whereas serum CAT and H2O2 were lower in diarrheic calves than those of healthy calves. Serum ROS, MDA, and 8OHDG and fecal ROS and MDA increased in the HD group from d 21 to 28 as they developed diarrhea. In contrast, all these oxidative stress markers decreased in the DH group from d 21 to 28 as they recovered. However, serum H2O2 had an opposite changing trend, which became lower in the HD group and higher in the DH group at d 28. In conclusion, both systemic and local oxidative stress markers and cytokine profiles altered as calves moved from being healthy to having diarrhea or vice versa. Serum ROS, MDA, and 8-OHDG can be used to develop biomarkers to screen calves prone to enteric infections during the preweaning period.
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Affiliation(s)
- Z L Fu
- State Key Laboratory of Animal Nutrition and Feeding, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China; Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, T6G 2P5, Canada
| | - Y Yang
- State Key Laboratory of Animal Nutrition and Feeding, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China; School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, A94 R704, Ireland
| | - L Ma
- State Key Laboratory of Animal Nutrition and Feeding, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - N Malmuthuge
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, T1J 4B1, Canada
| | - L L Guan
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, T6G 2P5, Canada; Faculty of Land and Food Systems, the University of British Columbia, Vancouver, BC, V6T 1Z4 Canada.
| | - D P Bu
- State Key Laboratory of Animal Nutrition and Feeding, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
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Ruiz-Valdepeñas Montiel V, Vargas E, Ben Hassine A, Simon I, Duvvuri A, Chang AY, Nandhakumar P, Bulbarello A, Düsterloh A, Mak T, Wang J. Decentralized ORP Measurements for Gut Redox Status Monitoring: Toward Personalized Gut Microbiota Balance. Anal Chem 2024; 96:480-487. [PMID: 38150379 DOI: 10.1021/acs.analchem.3c04570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
Abstract
Gut microbiome targeting has emerged as a new generation of personalized medicine and a potential wellness and disease driver. Specifically, the gut redox balance plays a key role in shaping the gut microbiota and its link with the host, immune system, and disease evolution. In this sense, precise and personalized nutrition has proven synergy and capability to modulate the gut microbiome environment through the formulation of dietary interventions, such as vitamin support. Accordingly, there are urgent demands for simple and effective analytical platforms for understanding the relationship between the tailored vitamin administration and the gut microbiota balance by rapid noninvasive on-the-spot oxidation/reduction potential monitoring for frequent and close surveillance of the gut redox status and targeting by personalized nutrition interventions. Herein, we present a disposable potentiometric sensor chip and a homemade multiwell potentiometric array to address the interplay of vitamin levels with the oxidation/reduction potential in human feces and saliva. The potentiometric ORP sensing platforms have been successfully validated and scaled up for the setup of a multiapplication prototype for cross-talk-free simple screening of many specimens. The interpersonal variability of the gut microbiota environment illustrates the potential of feces and saliva samples for noninvasive, frequent, and decentralized monitoring of the gut redox status to support timely human microbiota surveillance and guide precise dietary intervention toward restoring and promoting personalized gut redox balance.
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Affiliation(s)
- Víctor Ruiz-Valdepeñas Montiel
- Department of Nanoengineering, University of California San Diego, La Jolla, California 92093, United States
- Department of Analytical Chemistry, Chemistry Faculty, University Complutense of Madrid, E-28040 Madrid, Spain
| | - Eva Vargas
- Department of Nanoengineering, University of California San Diego, La Jolla, California 92093, United States
| | - Amira Ben Hassine
- Department of Nanoengineering, University of California San Diego, La Jolla, California 92093, United States
| | - Ignasi Simon
- Department of Nanoengineering, University of California San Diego, La Jolla, California 92093, United States
| | - Andres Duvvuri
- Department of Nanoengineering, University of California San Diego, La Jolla, California 92093, United States
| | - An-Yi Chang
- Department of Nanoengineering, University of California San Diego, La Jolla, California 92093, United States
| | - Ponnusamy Nandhakumar
- Department of Nanoengineering, University of California San Diego, La Jolla, California 92093, United States
| | | | | | - Tim Mak
- DSM-Firmenich AG, Kaiseraugst 4303, Switzerland
| | - Joseph Wang
- Department of Nanoengineering, University of California San Diego, La Jolla, California 92093, United States
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6
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Xu R, Feng N, Li Q, Wang H, Li L, Feng X, Su Y, Zhu W. Pectin supplementation accelerates post-antibiotic gut microbiome reconstitution orchestrated with reduced gut redox potential. THE ISME JOURNAL 2024; 18:wrae101. [PMID: 38857378 PMCID: PMC11203915 DOI: 10.1093/ismejo/wrae101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2024] [Revised: 05/31/2024] [Accepted: 06/09/2024] [Indexed: 06/12/2024]
Abstract
Antibiotic-induced gut dysbiosis (AID) presents a big challenge to host health, and the recovery from this dysbiosis is often slow and incomplete. AID is typically characterized by elevation in redox potential, Enterobacteriaceae load, and aerobic metabolism. In our previous study, a pectin-enriched diet was demonstrated to decrease fecal redox potential and modulate the gut microbiome. Therefore, we propose that pectin supplementation may modulate gut redox potential and favor post-antibiotic gut microbiome reconstitution from dysbiosis. In the present study, rats with AIDwere used to investigate the effects of pectin supplementation on post-antibiotic gut microbiome reconstitution from dysbiosis. The results showed that pectin supplementation accelerated post-antibiotic reconstitution of gut microbiome composition and function and led to enhancement of anabolic reductive metabolism and weakening of catabolic oxidative pathways. These results were corroborated by the measurement of redox potential, findings suggesting that pectin favors post-antibiotic recovery from dysbiosis. Pectin-modulated fecal microbiota transplantation accelerated the decrease in antibiotics-elevated redox potential and Enterobacteriaceae load similarly to pectin supplementation. Moreover, both pectin supplementation and Pectin-modulated fecal microbiota transplantation enriched anaerobic members, primarily from Lachnospiraceae orchestration with enhancement of microbial reductive metabolism in post-antibiotic rats. These findings suggested that pectin supplementation accelerated post-antibiotic gut microbiome reconstitution orchestrated with reduced gut redox potential and that the effect of pectin on redox potential was mediated by remodeling of the intestinal microbiota.
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Affiliation(s)
- Rongying Xu
- Laboratory of Gastrointestinal Microbiology, Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
- National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China
| | - Ni Feng
- Laboratory of Gastrointestinal Microbiology, Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
- National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China
| | - Qiuke Li
- Laboratory of Gastrointestinal Microbiology, Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
- National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China
| | - Hongyu Wang
- Laboratory of Gastrointestinal Microbiology, Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
- National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China
| | - Lian Li
- Laboratory of Gastrointestinal Microbiology, Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
- National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiaobo Feng
- Research Institute of General Surgery, Jinling Hospital, Nanjing University School of Medicine, Nanjing 210095, China
| | - Yong Su
- Laboratory of Gastrointestinal Microbiology, Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
- National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China
| | - Weiyun Zhu
- Laboratory of Gastrointestinal Microbiology, Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
- National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China
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7
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Geertsema S, Jansen BH, van Goor H, Dijkstra G, Faber KN, Bourgonje AR. Unsuitability of the Oxidation-Reduction Potential Measurement for the Quantification of Fecal Redox Status in Inflammatory Bowel Disease. Biomedicines 2023; 11:3107. [PMID: 38137328 PMCID: PMC10741202 DOI: 10.3390/biomedicines11123107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 10/27/2023] [Accepted: 11/01/2023] [Indexed: 12/24/2023] Open
Abstract
Oxidative stress is a key pathophysiological process associated with the development and progression of inflammatory bowel disease (IBD). Biomarkers for oxidative stress, however, are scarce, as are diagnostic tools that can interrogate an individual's gut redox status. This proof-of-concept study aimed to evaluate the potential utility of an oxidation-reduction potential (ORP) measurement probe, to quantify redox status in the feces of both patients with IBD and healthy controls. Previous studies using this ORP measurement probe demonstrated promising data when comparing ORP from severely malnourished individuals with that of healthy controls. To date, ORP analyses have not been performed in the context of IBD. We hypothesized that measuring the ORP of fecal water in patients with IBD might have diagnostic value. The current study, however, did not show significant differences in ORP measurement values between patients with IBD (median [IQR] 46.5 [33.0-61.2] mV) and healthy controls (25 [8.0-52.0] mV; p = 0.221). Additionally, ORP measurements were highly unstable and rapidly fluctuated throughout time, with ORP values varying from +24 to +303 mV. Due to potential biological processes and limitations of the measuring equipment, this study was unable to reliably measure ORP. As a result, our findings indicate that ORP quantification may not be a suitable method for assessing fecal redox status and, therefore, does not currently support further exploration as a diagnostic or monitoring tool.
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Affiliation(s)
- Sem Geertsema
- Department of Gastroenterology and Hepatology, University of Groningen, University Medical Center Groningen, 9713 GZ Groningen, The Netherlands; (S.G.); (B.H.J.); (G.D.); (K.N.F.)
| | - Bernadien H. Jansen
- Department of Gastroenterology and Hepatology, University of Groningen, University Medical Center Groningen, 9713 GZ Groningen, The Netherlands; (S.G.); (B.H.J.); (G.D.); (K.N.F.)
| | - Harry van Goor
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, 9713 GZ Groningen, The Netherlands;
| | - Gerard Dijkstra
- Department of Gastroenterology and Hepatology, University of Groningen, University Medical Center Groningen, 9713 GZ Groningen, The Netherlands; (S.G.); (B.H.J.); (G.D.); (K.N.F.)
| | - Klaas Nico Faber
- Department of Gastroenterology and Hepatology, University of Groningen, University Medical Center Groningen, 9713 GZ Groningen, The Netherlands; (S.G.); (B.H.J.); (G.D.); (K.N.F.)
| | - Arno R. Bourgonje
- Department of Gastroenterology and Hepatology, University of Groningen, University Medical Center Groningen, 9713 GZ Groningen, The Netherlands; (S.G.); (B.H.J.); (G.D.); (K.N.F.)
- The Henry D. Janowitz Division of Gastroenterology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
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8
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Penumutchu S, Korry BJ, Hewlett K, Belenky P. Fiber supplementation protects from antibiotic-induced gut microbiome dysbiosis by modulating gut redox potential. Nat Commun 2023; 14:5161. [PMID: 37620319 PMCID: PMC10449846 DOI: 10.1038/s41467-023-40553-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 07/31/2023] [Indexed: 08/26/2023] Open
Abstract
Antibiotic-induced gut dysbiosis (AID) is a frequent and serious side effect of antibiotic use and mitigating this dysbiosis is a critical therapeutic target. We propose that the host diet can modulate the chemical environment of the gut resulting in changes to the structure and function of the microbiome during antibiotic treatment. Gut dysbiosis is typically characterized by increases in aerobic respiratory bacterial metabolism, redox potential, and abundance of Proteobacteria. In this study, we explore dietary fiber supplements as potential modulators of the chemical environment in the gut to reduce this pattern of dysbiosis. Using defined-diets and whole-genome sequencing of female murine microbiomes during diet modulation and antibiotic treatment, we find that fiber prebiotics significantly reduced the impact of antibiotic treatment on microbiome composition and function. We observe reduced abundance of aerobic bacteria as well as metabolic pathways associated with oxidative metabolism. These metatranscriptomic results are corroborated by chemical measurements of eH and pH suggesting that fiber dampens the dysbiotic effects of antibiotics. This work indicates that fiber may act as a potential therapeutic for AID by modulating bacterial metabolism in the gut to prevent an increase in redox potential and protect commensal microbes during antibiotic treatment.
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Affiliation(s)
- Swathi Penumutchu
- Department of Molecular Microbiology and Immunology, Brown University, Providence, RI, 02912, USA
| | - Benjamin J Korry
- Department of Molecular Microbiology and Immunology, Brown University, Providence, RI, 02912, USA
| | - Katharine Hewlett
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Peter Belenky
- Department of Molecular Microbiology and Immunology, Brown University, Providence, RI, 02912, USA.
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9
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Inda-Webb ME, Jimenez M, Liu Q, Phan NV, Ahn J, Steiger C, Wentworth A, Riaz A, Zirtiloglu T, Wong K, Ishida K, Fabian N, Jenkins J, Kuosmanen J, Madani W, McNally R, Lai Y, Hayward A, Mimee M, Nadeau P, Chandrakasan AP, Traverso G, Yazicigil RT, Lu TK. Sub-1.4 cm 3 capsule for detecting labile inflammatory biomarkers in situ. Nature 2023; 620:386-392. [PMID: 37495692 DOI: 10.1038/s41586-023-06369-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 06/26/2023] [Indexed: 07/28/2023]
Abstract
Transient molecules in the gastrointestinal tract such as nitric oxide and hydrogen sulfide are key signals and mediators of inflammation. Owing to their highly reactive nature and extremely short lifetime in the body, these molecules are difficult to detect. Here we develop a miniaturized device that integrates genetically engineered probiotic biosensors with a custom-designed photodetector and readout chip to track these molecules in the gastrointestinal tract. Leveraging the molecular specificity of living sensors1, we genetically encoded bacteria to respond to inflammation-associated molecules by producing luminescence. Low-power electronic readout circuits2 integrated into the device convert the light emitted by the encapsulated bacteria to a wireless signal. We demonstrate in vivo biosensor monitoring in the gastrointestinal tract of small and large animal models and the integration of all components into a sub-1.4 cm3 form factor that is compatible with ingestion and capable of supporting wireless communication. With this device, diseases such as inflammatory bowel disease could be diagnosed earlier than is currently possible, and disease progression could be more accurately tracked. The wireless detection of short-lived, disease-associated molecules with our device could also support timely communication between patients and caregivers, as well as remote personalized care.
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Affiliation(s)
- M E Inda-Webb
- Synthetic Biology Group, MIT Synthetic Biology Center, Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
- Research Laboratory of Electronics, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - M Jimenez
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Q Liu
- Electrical and Computer Engineering Department, Boston University, Boston, MA, USA
| | - N V Phan
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - J Ahn
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - C Steiger
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - A Wentworth
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - A Riaz
- Electrical and Computer Engineering Department, Boston University, Boston, MA, USA
| | - T Zirtiloglu
- Electrical and Computer Engineering Department, Boston University, Boston, MA, USA
| | - K Wong
- Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - K Ishida
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - N Fabian
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Division of Comparative Medicine, MIT, Cambridge, MA, USA
| | - J Jenkins
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - J Kuosmanen
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - W Madani
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - R McNally
- Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Y Lai
- Synthetic Biology Group, MIT Synthetic Biology Center, Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
- Research Laboratory of Electronics, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - A Hayward
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
- Division of Comparative Medicine, MIT, Cambridge, MA, USA
| | - M Mimee
- Department of Microbiology, Biological Sciences Division and Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL, USA
| | | | - A P Chandrakasan
- Department of Electrical Engineering and Computer Science, MIT, Cambridge, MA, USA
| | - G Traverso
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA.
- Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
| | - R T Yazicigil
- Electrical and Computer Engineering Department, Boston University, Boston, MA, USA.
| | - T K Lu
- Synthetic Biology Group, MIT Synthetic Biology Center, Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
- Research Laboratory of Electronics, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, USA.
- Senti Biosciences, South San Francisco, CA, USA.
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10
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Botin T, Ramirez-Chamorro L, Vidic J, Langella P, Martin-Verstraete I, Chatel JM, Auger S. The Tolerance of Gut Commensal Faecalibacterium to Oxidative Stress Is Strain Dependent and Relies on Detoxifying Enzymes. Appl Environ Microbiol 2023; 89:e0060623. [PMID: 37382539 PMCID: PMC10370306 DOI: 10.1128/aem.00606-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 06/12/2023] [Indexed: 06/30/2023] Open
Abstract
Obligate anaerobic bacteria in genus Faecalibacterium are among the most dominant taxa in the colon of healthy individuals and contribute to intestinal homeostasis. A decline in the abundance of this genus is associated with the occurrence of various gastrointestinal disorders, including inflammatory bowel diseases. In the colon, these diseases are accompanied by an imbalance between the generation and elimination of reactive oxygen species (ROS), and oxidative stress is closely linked to disruptions in anaerobiosis. In this work, we explored the impact of oxidative stress on several strains of faecalibacteria. An in silico analysis of complete genomes of faecalibacteria revealed the presence of genes encoding O2- and/or ROS-detoxifying enzymes, including flavodiiron proteins, rubrerythrins, reverse rubrerythrins, superoxide reductases, and alkyl peroxidase. However, the presence and the number of these detoxification systems varied greatly among faecalibacteria. These results were confirmed by O2 stress survival tests, in which we found that strains differed widely in their sensitivity. We showed the protective role of cysteine, which limited the production of extracellular O2•- and improved the survival of Faecalibacterium longum L2-6 under high O2 tension. In the strain F. longum L2-6, we observed that the expression of genes encoding detoxifying enzymes was upregulated in the response to O2 or H2O2 stress but with different patterns of regulation. Based on these results, we propose a first model of the gene regulatory network involved in the response to oxidative stress in F. longum L2-6. IMPORTANCE Commensal bacteria in the genus Faecalibacterium have been proposed for use as next-generation probiotics, but efforts to cultivate and exploit the potential of these strains have been limited by their sensitivity to O2. More broadly, little is known about how commensal and health-associated bacterial species in the human microbiome respond to the oxidative stress that occurs as a result of inflammation in the colon. In this work, we provide insights regarding the genes that encode potential mechanisms of protection against O2 or ROS stress in faecalibacteria, which may facilitate future advances in work with these important bacteria.
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Affiliation(s)
- Tatiana Botin
- Université Paris Saclay, INRAE, AgroParisTech, UMR1319, MICALIS, Jouy-en-Josas, France
| | - Luis Ramirez-Chamorro
- Université Paris Saclay, INRAE, AgroParisTech, UMR1319, MICALIS, Jouy-en-Josas, France
| | - Jasmina Vidic
- Université Paris Saclay, INRAE, AgroParisTech, UMR1319, MICALIS, Jouy-en-Josas, France
| | - Philippe Langella
- Université Paris Saclay, INRAE, AgroParisTech, UMR1319, MICALIS, Jouy-en-Josas, France
| | - Isabelle Martin-Verstraete
- Institut Pasteur, Université Paris Cité, UMR CNRS 6047, Laboratoire Pathogénèse des Bactéries Anaérobies, Paris, France
- Institut Universitaire de France, Paris, France
| | - Jean-Marc Chatel
- Université Paris Saclay, INRAE, AgroParisTech, UMR1319, MICALIS, Jouy-en-Josas, France
| | - Sandrine Auger
- Université Paris Saclay, INRAE, AgroParisTech, UMR1319, MICALIS, Jouy-en-Josas, France
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11
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Qi X, Zhang Y, Zhang Y, Luo F, Song K, Wang G, Ling F. Vitamin B 12 produced by Cetobacterium somerae improves host resistance against pathogen infection through strengthening the interactions within gut microbiota. MICROBIOME 2023; 11:135. [PMID: 37322528 PMCID: PMC10268390 DOI: 10.1186/s40168-023-01574-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 05/15/2023] [Indexed: 06/17/2023]
Abstract
BACKGROUND Pathogen infections seriously affect host health, and the use of antibiotics increases the risk of the emergence of drug-resistant bacteria and also increases environmental and health safety risks. Probiotics have received much attention for their excellent ability to prevent pathogen infections. Particularly, explaining mechanism of action of probiotics against pathogen infections is important for more efficient and rational use of probiotics and the maintenance of host health. RESULTS Here, we describe the impacts of probiotic on host resistance to pathogen infections. Our findings revealed that (I) the protective effect of oral supplementation with B. velezensis against Aeromonas hydrophila infection was dependent on gut microbiota, specially the anaerobic indigenous gut microbe Cetobacterium; (II) Cetobacterium was a sensor of health, especially for fish infected with pathogenic bacteria; (III) the genome resolved the ability of Cetobacterium somerae CS2105-BJ to synthesize vitamin B12 de novo, while in vivo and in vitro metabolism assays also showed the ability of Cetobacterium somerae CS2105-BJ to produce vitamin B12; (IV) the addition of vitamin B12 significantly altered the gut redox status and the gut microbiome structure and function, and then improved the stability of the gut microbial ecological network, and enhanced the gut barrier tight junctions to prevent the pathogen infection. CONCLUSION Collectively, this study found that the effect of probiotics in enhancing host resistance to pathogen infections depended on function of B12 produced by an anaerobic indigenous gut microbe, Cetobacterium. Furthermore, as a gut microbial regulator, B12 exhibited the ability to strengthen the interactions within gut microbiota and gut barrier tight junctions, thereby improving host resistance against pathogen infection. Video Abstract.
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Affiliation(s)
- Xiaozhou Qi
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Yong Zhang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Yilin Zhang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Fei Luo
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Kaige Song
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Gaoxue Wang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China.
| | - Fei Ling
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China.
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12
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Baltsavias S, Van Treuren W, Sawaby A, Baker SW, Sonnenburg JL, Arbabian A. Gut Microbiome Redox Sensors With Ultrasonic Wake-Up and Galvanic Coupling Wireless Links. IEEE Trans Biomed Eng 2023; 70:76-87. [PMID: 35727787 PMCID: PMC9911315 DOI: 10.1109/tbme.2022.3184972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Tools to measure in vivo redox activity of the gut microbiome and its influence on host health are lacking. In this paper, we present the design of new in vivo gut oxidation-reduction potential (ORP) sensors for rodents, to study host-microbe and microbe-environment interactions throughout the gut. These are the first in vivo sensors to combine ultrasonic wake-up and galvanic coupling telemetry, allowing for sensor miniaturization, experiment flexibility, and robust wireless measurements in live rodents. A novel study of in situ ORP along the intestine reveals biogeographical redox features that the ORP sensors can uniquely access in future gut microbiome studies.
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13
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Jaswal K, Todd OA, Behnsen J. Neglected gut microbiome: interactions of the non-bacterial gut microbiota with enteric pathogens. Gut Microbes 2023; 15:2226916. [PMID: 37365731 DOI: 10.1080/19490976.2023.2226916] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 06/12/2023] [Accepted: 06/14/2023] [Indexed: 06/28/2023] Open
Abstract
A diverse array of commensal microorganisms inhabits the human intestinal tract. The most abundant and most studied members of this microbial community are undoubtedly bacteria. Their important role in gut physiology, defense against pathogens, and immune system education has been well documented over the last decades. However, the gut microbiome is not restricted to bacteria. It encompasses the entire breadth of microbial life: viruses, archaea, fungi, protists, and parasitic worms can also be found in the gut. While less studied than bacteria, their divergent but important roles during health and disease have become increasingly more appreciated. This review focuses on these understudied members of the gut microbiome. We will detail the composition and development of these microbial communities and will specifically highlight their functional interactions with enteric pathogens, such as species of the family Enterobacteriaceae. The interactions can be direct through physical interactions, or indirect through secreted metabolites or modulation of the immune response. We will present general concepts and specific examples of how non-bacterial gut communities modulate bacterial pathogenesis and present an outlook for future gut microbiome research that includes these communities.
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Affiliation(s)
- Kanchan Jaswal
- Department of Microbiology and Immunology, University of Illinois Chicago, Chicago, IL, USA
| | - Olivia A Todd
- Department of Microbiology and Immunology, University of Illinois Chicago, Chicago, IL, USA
| | - Judith Behnsen
- Department of Microbiology and Immunology, University of Illinois Chicago, Chicago, IL, USA
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14
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Implication of gut microbes and its metabolites in colorectal cancer. J Cancer Res Clin Oncol 2023; 149:441-465. [PMID: 36572792 DOI: 10.1007/s00432-022-04422-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 10/14/2022] [Indexed: 12/28/2022]
Abstract
BACKGROUND Colorectal cancer (CRC) is the third most common cancer with a significant impact on loss of life. In 2020, nearly 1.9 million new cases and over 9,35,000 deaths were reported. Numerous microbes that are abundant in the human gut benefit host physiology in many ways. Although the underlying mechanism is still unknown, their association appears to be crucial in the beginning and progression of CRC. Diet has a significant impact on the microbial composition and may increase the chance of getting CRC. Increasing evidence points to the gut microbiota as the primary initiator of colonic inflammation, which is connected to the development of colonic tumors. However, it is unclear how the microbiota contributes to the development of CRCs. Patients with CRC have been found to have dysbiosis of the gut microbiota, which can be identified by a decline in commensal bacterial species, such as those that produce butyrate, and a concurrent increase in harmful bacterial populations, such as opportunistic pathogens that produce pro-inflammatory cytokines. We believe that using probiotics or altering the gut microbiota will likely be effective tools in the fight against CRC treatment. PURPOSE In this review, we revisited the association between gut microbiota and colorectal cancer whether cause or effect. The various factors which influence gut microbiome in patients with CRC and possible mechanism in relation with development of CRC. CONCLUSION The clinical significance of the intestinal microbiota may aid in the prevention and management of CRC.
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15
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Hazan S, Dave S, Papoutsis AJ, Deshpande N, Howell MC, Martin LM. Vitamin C improves gut Bifidobacteria in humans. Future Microbiol 2022. [PMID: 36475828 DOI: 10.2217/fmb-2022-0209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Aims: Numerous beneficial effects of vitamin C (ascorbic acid) supplementation have been reported in the literature. However, data on its effects toward the gut microbiome are limited. We assessed the effect of vitamin C supplementation on the abundance of beneficial bacterial species in the gut microbiome. Materials and methods: Stool samples were analyzed for relative abundance of gut microbiome bacteria using next-generation sequencing-based profiling and metagenomic shotgun analysis. Results: Supplementation with vitamin C increased the abundance of bacteria of the genus Bifidobacterium (p = 0.0001) and affected various species. Conclusion: The beneficial effects of vitamin C supplementation may be attributed to modulation of the gut microbiome and the consequent health benefits thereof.
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Affiliation(s)
- Sabine Hazan
- ProgenaBIome, LLC, Ventura, CA 93003, USA
- Mcrobiome Research Foundation, Ventura, CA 93003, USA
| | - Sonya Dave
- Mcrobiome Research Foundation, Ventura, CA 93003, USA
| | | | | | | | - Leisha Ma Martin
- Texas A&M University - Corpus Christi, Department of Life Sciences, Corpus Christi, TX 78412, USA
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16
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Pausan MR, Blohs M, Mahnert A, Moissl-Eichinger C. The sanitary indoor environment-a potential source for intact human-associated anaerobes. NPJ Biofilms Microbiomes 2022; 8:44. [PMID: 35650275 PMCID: PMC9160270 DOI: 10.1038/s41522-022-00305-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 05/04/2022] [Indexed: 02/06/2023] Open
Abstract
A healthy human microbiome relies on the interaction with and exchange of microbes that takes place between the human body and its environment. People in high-income countries spend most of their time indoors and for this reason, the built environment (BE) might represent a potent source of commensal microbes. Anaerobic microbes are of particular interest, as researchers have not yet sufficiently clarified how the human microbiome acquires oxygen-sensitive microbes. We sampled the bathrooms in ten households and used propidium monoazide (PMA) to assess the viability of the collected prokaryotes. We compared the microbiome profiles based on 16S rRNA gene sequencing and confirmed our results by genetic and cultivation-based analyses. Quantitative and qualitative analysis revealed that most of the microbial taxa in the BE samples are human-associated. Less than 25% of the prokaryotic signatures originate from intact cells, indicating that aerobic and stress resistant taxa display an apparent survival advantage. However, we also confirmed the presence of intact, strictly anaerobic taxa on bathroom floors, including methanogenic archaea. As methanogens are regarded as highly sensitive to aerobic conditions, oxygen-tolerance experiments were performed with human-associated isolates to validate their survival. These results show that human-associated methanogens can survive oxic conditions for at least 6 h. We collected strong evidence that supports the hypothesis that obligate anaerobic taxa can survive in the BE for a limited amount of time. This suggests that the BE serves as a potential source of anaerobic human commensals.
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Affiliation(s)
- Manuela-Raluca Pausan
- Diagnostic and Research Institute of Hygiene, Microbiology and Environmental Medicine, Medical University of Graz, Graz, Austria
- Steigerwald Arzneimittelwerk GmbH, Bayer Consumer Health, Darmstadt, Germany
| | - Marcus Blohs
- Diagnostic and Research Institute of Hygiene, Microbiology and Environmental Medicine, Medical University of Graz, Graz, Austria
| | - Alexander Mahnert
- Diagnostic and Research Institute of Hygiene, Microbiology and Environmental Medicine, Medical University of Graz, Graz, Austria
| | - Christine Moissl-Eichinger
- Diagnostic and Research Institute of Hygiene, Microbiology and Environmental Medicine, Medical University of Graz, Graz, Austria.
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17
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Panigrahi MK, Kaliaperumal V, Akella A, Venugopal G, Ramadass B. Mapping microbiome-redox spectrum and evaluating Microbial-Redox Index in chronic gastritis. Sci Rep 2022; 12:8450. [PMID: 35589904 PMCID: PMC9120160 DOI: 10.1038/s41598-022-12431-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 05/11/2022] [Indexed: 12/27/2022] Open
Abstract
Peptic ulcer disease (PUD) and chronic gastritis are prevalent in developing countries. The role of oxidative stress in the pathogenesis of gastrointestinal mucosal disorders is well recognized. In PUD, the gastric mucosa and its associated microbiome are subject to diet and stress-induced oxidative perturbations. Tissue redox potential (ORP) measurement can quantify oxidative stress, reflecting the balance between prooxidants and antioxidants. This study hypothesizes that the oxidative stress quantified by tissue ORP will be associated with characteristic changes in the mucosa-associated microbiome in PUD and gastritis. In addition, we propose using relative microbial abundance as a quantitative marker of mucosal health. Endoscopy was performed to obtain gastric mucosal biopsies from ten PUD and ten non-ulcer dyspepsia (NUD) patients. The tissue ORP was measured directly with a microelectrode using a biopsy specimen. A second specimen from an adjacent site was subjected to 16s rRNA gene sequencing. From the OTUs, the relative abundance of the microbial taxon in each of the samples was derived. We analyzed the genome of the predominant species for genes encoding the utilization of oxygen as an electron acceptor in respiration and for the presence of antioxidant defense mechanisms. The organisms were then grouped based on their established and inferred redox traits. Shannon diversity index and Species richness were calculated on rarefied data. The relative abundance of organisms that prefer high ORP over those that favor low ORP is conceived as the “Microbial Redox Index (MRI),” an indicator of mucosal health. In the gastric mucosa, aerobic species predominate and are more diverse than the anaerobes. The predominant aerobes are Helicobacter pylori and Sphingobacterium mizutaii. The abundance of these two species had an inverse correlation with the abundance of low ORP preferring anaerobes. Their relative abundance ratio (Microbial Redox Index) correlated with the tissue oxidation–reduction potential (ORP), a direct measure of oxidative stress. Correlation analysis also revealed that the abundance of all anaerobes inversely correlated with the dominant aerobic taxa. In addition, Shannon and Species richness diversity indices, the probable indicators of mucosal health, were negatively correlated with Microbial Redox Index. Using PUD as a prototype mucosal disease, this article describes a generalized approach to infer and quantify mucosal oxidative stress by analyzing the relative abundance of microorganisms that preferentially grow at the extremes of the tissue redox potential. This ratiometric Microbial Redox Index can also be assessed using simple qPCR without the need for sequencing. The approach described herein may be helpful as a widely applicable quantitative measure of mucosal health with prognostic and therapeutic implications.
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Affiliation(s)
- Manas Kumar Panigrahi
- Department of Gastroenterology, All India Institute of Medical Sciences, Bhubaneswar, India
| | - Venkatesh Kaliaperumal
- MYAS-NIN Department of Sports Science, ICMR-National Institute of Nutrition, Hyderabad, India
| | - Abhishek Akella
- Center of Excellence for Clinical Microbiome Research, All India Institute of Medical Sciences, Bhubaneswar, 751019, India
| | - Giriprasad Venugopal
- Center of Excellence for Clinical Microbiome Research, All India Institute of Medical Sciences, Bhubaneswar, 751019, India
| | - Balamurugan Ramadass
- Center of Excellence for Clinical Microbiome Research, All India Institute of Medical Sciences, Bhubaneswar, 751019, India. .,Department of Biochemistry, All India Institute of Medical Sciences, Bhubaneswar, India.
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18
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Diet Fermentation Leads to Microbial Adaptation in Black Soldier Fly (Hermetia illucens; Linnaeus, 1758) Larvae Reared on Palm Oil Side Streams. SUSTAINABILITY 2022. [DOI: 10.3390/su14095626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Insects offer a promising alternative source of protein to mitigate the environmental consequences of conventional livestock farming. Larvae of the black soldier fly (Hermetia illucens; Linnaeus, 1758) efficiently convert a variety of organic side streams and residues into valuable proteins, lipids, and chitin. Here, we evaluated the suitability of two palm oil industry side streams—empty fruit bunches (EFB) and palm kernel meal (PKM)—as larval feed, and their impact on the larval gut microbiome. Among 69 fungal species we screened, Marasmius palmivorus, Irpex consors, and Bjerkandera adusta achieved the fastest growth and lignin degradation, so these fungi were used for the pretreatment of 7:3 mixtures of EFB and PKM. Larvae reared on the mixture pretreated with B. adusta (BAD) developed significantly more quickly and reached a higher final weight than those reared on the other pretreatments or the non-fermented reference (NFR). Amplicon sequencing of the BAD and NFR groups revealed major differences in the larval gut microbiome. The NFR group was dominated by facultatively anaerobic Enterobacteriaceae (typical of H. illucens larvae) whereas the BAD group favored obligately anaerobic, cellulolytic bacteria (Ruminococcaceae and Lachnospiraceae). We hypothesize that fungal lignin degradation led to an accumulation of mycelia and subsequent cellulolytic breakdown of fiber residues, thus improving substrate digestibility.
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19
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Zhu YY, Thakur K, Feng JY, Zhang JG, Hu F, Cespedes-Acuña CL, Liao C, Wei ZJ. Riboflavin Bioenriched Soymilk Alleviates Oxidative Stress Mediated Liver Injury, Intestinal Inflammation, and Gut Microbiota Modification in B 2 Depletion-Repletion Mice. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:3818-3831. [PMID: 35302755 DOI: 10.1021/acs.jafc.2c00117] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Epidemiological evidence emphasizes that ariboflavinosis can lead to oxidative stress, which in turn may mediate the initiation and progression of liver injury and intestinal inflammation. Although vitamin B2 has gained worldwide attention for its antioxidant defense, the relationship between B2 status, oxidative stress, inflammatory response, and intestinal homeostasis remains indistinct. Herein, we developed a B2 depletion-repletion BALB/c mice model to investigate the ameliorative effects of B2 bioenriched fermented soymilk (B2FS) on ariboflavinosis, accompanied by oxidative stress, inflammation, and gut microbiota modulation in response to B2 deficiency. In vivo results revealed that the phenotypic ariboflavinosis symptoms, growth rate, EGRAC status, and hepatic function reverted to normal after B2FS supplementation. B2FS significantly elevated CAT, SOD, T-AOC, and compromised MDA levels in the serum, simultaneously up-regulated Nrf2, CAT, and SOD2, and down-regulated Keap1 gene in the colon. The histopathological characteristics revealed significant alleviation in the liver and intestinal inflammation, confirmed by the downregulation of inflammatory (IL-1β and IL-6) and nuclear transcription (NF-κB) factors after B2FS supplementation. B2FS also increased the abundance and diversity of gut microbiota, increased the relative abundance of Prevotella and Absiella, as well as decreased Proteobacteria, Fusobacteria, Synergistetes, and Cyanobacteria in strong conjunction with antioxidant, anti-inflammatory properties, and gut homeostasis along with the remarkable increase in cecal SCFAs content. We hereby reveal that B2FS can effectively alleviate deleterious ariboflavinosis associated with oxidative stress mediated liver injury, chronic intestinal inflammation, and gut dysbiosis in the B2 depletion-repletion mice model via activation of the Nrf2 signaling pathway.
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Affiliation(s)
- Yun-Yang Zhu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China
| | - Kiran Thakur
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China
- School of Biological Science and Engineering, Collaborative Innovation Center for Food Production and Safety, North Minzu University, Yinchuan 750021, People's Republic of China
| | - Jing-Yu Feng
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China
| | - Jian-Guo Zhang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China
- School of Biological Science and Engineering, Collaborative Innovation Center for Food Production and Safety, North Minzu University, Yinchuan 750021, People's Republic of China
| | - Fei Hu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China
- School of Biological Science and Engineering, Collaborative Innovation Center for Food Production and Safety, North Minzu University, Yinchuan 750021, People's Republic of China
| | - Carlos L Cespedes-Acuña
- Department of Basic Sciences, Research Group in Chemistry and Biotechnology of Bioactive Natural Products, Faculty of Sciences, University of Bio-Bío, Andrés Bello Avenue, Chillan 3800708, Chile
| | - Chenzhong Liao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China
| | - Zhao-Jun Wei
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China
- School of Biological Science and Engineering, Collaborative Innovation Center for Food Production and Safety, North Minzu University, Yinchuan 750021, People's Republic of China
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20
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Novel Developments on Stimuli-Responsive Probiotic Encapsulates: From Smart Hydrogels to Nanostructured Platforms. FERMENTATION 2022. [DOI: 10.3390/fermentation8030117] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Biomaterials engineering and biotechnology have advanced significantly towards probiotic encapsulation with encouraging results in assuring sufficient bioactivity. However, some major challenges remain to be addressed, and these include maintaining stability in different compartments of the gastrointestinal tract (GIT), favoring adhesion only at the site of action, and increasing residence times. An alternative to addressing such challenges is to manufacture encapsulates with stimuli-responsive polymers, such that controlled release is achievable by incorporating moieties that respond to chemical and physical stimuli present along the GIT. This review highlights, therefore, such emerging delivery matrices going from a comprehensive description of addressable stimuli in each GIT compartment to novel synthesis and functionalization techniques to currently employed materials used for probiotic’s encapsulation and achieving multi-modal delivery and multi-stimuli responses. Next, we explored the routes for encapsulates design to enhance their performance in terms of degradation kinetics, adsorption, and mucus and gut microbiome interactions. Finally, we present the clinical perspectives of implementing novel probiotics and the challenges to assure scalability and cost-effectiveness, prerequisites for an eventual niche market penetration.
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21
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Calik A, Emami NK, Schyns G, White MB, Walsh MC, Romero LF, Dalloul RA. Influence of dietary vitamin E and selenium supplementation on broilers subjected to heat stress, Part II: Oxidative stress, immune response, gut integrity, and intestinal microbiota. Poult Sci 2022; 101:101858. [PMID: 35468426 PMCID: PMC9059080 DOI: 10.1016/j.psj.2022.101858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 03/09/2022] [Indexed: 01/22/2023] Open
Abstract
This study evaluated the effects of vitamin E (Vit E) and selenium (Se) supplementation on mRNA abundance of antioxidant, immune response, and tight junction genes, as well as taxonomic and functional profiles of ileal microbiota of broilers exposed to daily 4-h elevated temperature during d 28 to 35. A total of 640-day-old Cobb male broiler chicks were randomly allocated to 32 floor pens in a 2 × 2 factorial arrangement that included ambient temperature (thermoneutral [TN] or heat stress [HS]) and dietary treatments (basal diet or Vit E + Se). Vit E and organic Se were added to the basal diet at the rate of 250 mg/kg and 1 mg/kg, respectively. Liver and jejunum tissue samples were taken on d 27 (1 bird/pen), d 28 and d 35 (2 birds/pen) from birds for qPCR analysis. Data were subjected to a 2-way ANOVA using the GLM procedure of JMP. Ileal contents were taken on d 27 and d 35 for microbial profiling. Microbiota data were analyzed in QIIME 2 and significance between treatments identified linear discriminant analysis effect size (LEfSe, P < 0.05). Dietary Vit E/Se significantly downregulated the mRNA levels of HSPs in liver and jejunal tissues of the HS-challenged birds both on d 28 and d 35. Moreover, mRNA abundance of TLR2, TNFα, IFNγ, IL-1β, IL-10, and iNOS in the liver were significantly downregulated in birds fed the Vit E/Se diet on d 35. However, dietary treatment had no significant impact on oxidative stress, immunity, and gut integrity related genes analyzed in jejunal tissues on d 28 and d 35, except downregulation of IFNγ on d 35 (P = 0.052). LEfSe analysis revealed that Lachnospiraceae FE2018 and Ruminococcaceae NK4A214 groups was enriched in the Vit E/Se birds on d 35. Moreover, PICRUSt analysis predicted significant functional differences among the treatment groups. In conclusion, dietary supplementation of Vit E/Se mitigated the negative effects of HS potentially via improving antioxidant status, regulating cytokine responses and modifying ileal microbiota and its function.
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22
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Ilyas Z, Perna S, A. Alalwan T, Zahid MN, Spadaccini D, Gasparri C, Peroni G, Faragli A, Alogna A, La Porta E, Ali Redha A, Negro M, Cerullo G, D’Antona G, Rondanelli M. The Ketogenic Diet: Is It an Answer for Sarcopenic Obesity? Nutrients 2022; 14:620. [PMID: 35276979 PMCID: PMC8838342 DOI: 10.3390/nu14030620] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 01/02/2022] [Accepted: 01/10/2022] [Indexed: 12/18/2022] Open
Abstract
This review aims to define the effectiveness of the ketogenic diet (KD) for the management of sarcopenic obesity. As the combination of sarcopenia and obesity appears to have multiple negative metabolic effects, this narrative review discusses the effects of the ketogenic diet as a possible synergic intervention to decrease visceral adipose tissue (VAT) and fatty infiltration of the liver as well as modulate and improve the gut microbiota, inflammation and body composition. The results of this review support the evidence that the KD improves metabolic health and expands adipose tissue γδ T cells that are important for glycaemia control during obesity. The KD is also a therapeutic option for individuals with sarcopenic obesity due to its positive effect on VAT, adipose tissue, cytokines such as blood biochemistry, gut microbiota, and body composition. However, the long-term effect of a KD on these outcomes requires further investigations before general recommendations can be made.
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Affiliation(s)
- Zahra Ilyas
- Department of Laboratory, Bahrain Specialist Hospital, Juffair P.O. Box 10588, Bahrain
- Department of Biology, College of Science, Sakhir Campus, University of Bahrain, Zallaq P.O. Box 32038, Bahrain; (S.P.); (T.A.A.); (M.N.Z.)
| | - Simone Perna
- Department of Biology, College of Science, Sakhir Campus, University of Bahrain, Zallaq P.O. Box 32038, Bahrain; (S.P.); (T.A.A.); (M.N.Z.)
| | - Tariq A. Alalwan
- Department of Biology, College of Science, Sakhir Campus, University of Bahrain, Zallaq P.O. Box 32038, Bahrain; (S.P.); (T.A.A.); (M.N.Z.)
| | - Muhammad Nauman Zahid
- Department of Biology, College of Science, Sakhir Campus, University of Bahrain, Zallaq P.O. Box 32038, Bahrain; (S.P.); (T.A.A.); (M.N.Z.)
| | - Daniele Spadaccini
- Endocrinology and Nutrition Unit, Azienda di Servizi alla Persona “Istituto Santa Margherita”, University of Pavia, 27100 Pavia, Italy; (D.S.); (C.G.); (G.P.)
| | - Clara Gasparri
- Endocrinology and Nutrition Unit, Azienda di Servizi alla Persona “Istituto Santa Margherita”, University of Pavia, 27100 Pavia, Italy; (D.S.); (C.G.); (G.P.)
| | - Gabriella Peroni
- Endocrinology and Nutrition Unit, Azienda di Servizi alla Persona “Istituto Santa Margherita”, University of Pavia, 27100 Pavia, Italy; (D.S.); (C.G.); (G.P.)
| | - Alessandro Faragli
- Department of Internal Medicine/Cardiology, Deutsches Herzzentrum Berlin, 13353 Berlin, Germany;
- Department of Internal Medicine and Cardiology, Campus Virchow-Klinikum, Charité—Universitätsmedizin Berlin, 13353 Berlin, Germany;
- DZHK (German Centre for Cardiovascular Research), Partner Site Berlin, 10785 Berlin, Germany
- Berlin Institute of Health (BIH), 10178 Berlin, Germany
| | - Alessio Alogna
- Department of Internal Medicine and Cardiology, Campus Virchow-Klinikum, Charité—Universitätsmedizin Berlin, 13353 Berlin, Germany;
- DZHK (German Centre for Cardiovascular Research), Partner Site Berlin, 10785 Berlin, Germany
- Berlin Institute of Health (BIH), 10178 Berlin, Germany
| | - Edoardo La Porta
- Department of Cardionephrology, Istituto Clinico Ligure Di Alta Specialità (ICLAS), GVM Care and Research, 16035 Rapallo, Italy;
- Department of Internal Medicine (DiMi), University of Genova, 16121 Genova, Italy
| | - Ali Ali Redha
- Department of Chemistry, College of Science, Sakhir Campus, University of Bahrain, Zallaq P.O. Box 32038, Bahrain;
- Chemistry Department, School of Science, Loughborough University, Loughborough LE11 3TU, UK
| | - Massimo Negro
- CRIAMS-Sport Medicine Centre, 27058 Voghera, Italy; (M.N.); (G.D.)
| | - Giuseppe Cerullo
- Department of Movement and Wellbeing Sciences, University of Naples “Parthenope”, 80133 Napoli, Italy;
| | - Giuseppe D’Antona
- CRIAMS-Sport Medicine Centre, 27058 Voghera, Italy; (M.N.); (G.D.)
- Department of Public Health, Experimental and Forensic Medicine, University of Pavia, 27100 Pavia, Italy;
| | - Mariangela Rondanelli
- Department of Public Health, Experimental and Forensic Medicine, University of Pavia, 27100 Pavia, Italy;
- IRCCS Mondino Foundation, 27100 Pavia, Italy
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23
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Pham VT, Fehlbaum S, Seifert N, Richard N, Bruins MJ, Sybesma W, Rehman A, Steinert RE. Effects of colon-targeted vitamins on the composition and metabolic activity of the human gut microbiome- a pilot study. Gut Microbes 2022; 13:1-20. [PMID: 33615992 PMCID: PMC7899684 DOI: 10.1080/19490976.2021.1875774] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
An increasing body of evidence has shown that gut microbiota imbalances are linked to diseases. Currently, the possibility of regulating gut microbiota to reverse these perturbations by developing novel therapeutic and preventive strategies is being extensively investigated. The modulatory effect of vitamins on the gut microbiome and related host health benefits remain largely unclear. We investigated the effects of colon-delivered vitamins A, B2, C, D, and E on the gut microbiota using a human clinical study and batch fermentation experiments, in combination with cell models for the assessment of barrier and immune functions. Vitamins C, B2, and D may modulate the human gut microbiome in terms of metabolic activity and bacterial composition. The most distinct effect was that of vitamin C, which significantly increased microbial alpha diversity and fecal short-chain fatty acids compared to the placebo. The remaining vitamins tested showed similar effects on microbial diversity, composition, and/or metabolic activity in vitro, but in varying degrees. Here, we showed that vitamins may modulate the human gut microbiome. Follow-up studies investigating targeted delivery of vitamins to the colon may help clarify the clinical significance of this novel concept for treating and preventing dysbiotic microbiota-related human diseases. Trial registration: ClinicalTrials.gov, NCT03668964. Registered 13 September 2018 - Retrospectively registered, https://clinicaltrials.gov/ct2/show/NCT03668964.
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Affiliation(s)
- Van T. Pham
- R&D Human Nutrition and Health, DSM Nutritional Products Ltd., Basel, Switzerland,CONTACT Van T. Pham Wurmisweg 576, 4303 Kaiseraugst203/117A+41 618 158 828
| | - Sophie Fehlbaum
- R&D Human Nutrition and Health, DSM Nutritional Products Ltd., Basel, Switzerland
| | - Nicole Seifert
- R&D Human Nutrition and Health, DSM Nutritional Products Ltd., Basel, Switzerland
| | - Nathalie Richard
- R&D Human Nutrition and Health, DSM Nutritional Products Ltd., Basel, Switzerland
| | - Maaike J. Bruins
- R&D Human Nutrition and Health, DSM Nutritional Products Ltd., Basel, Switzerland
| | - Wilbert Sybesma
- R&D Human Nutrition and Health, DSM Nutritional Products Ltd., Basel, Switzerland
| | - Ateequr Rehman
- R&D Human Nutrition and Health, DSM Nutritional Products Ltd., Basel, Switzerland
| | - Robert E. Steinert
- R&D Human Nutrition and Health, DSM Nutritional Products Ltd., Basel, Switzerland,Department of Surgery, Division of Visceral and Transplantation Surgery, University Hospital Zurich, Zurich, Switzerland
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24
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Aggarwal H, Pathak P, Kumar Y, Jagavelu K, Dikshit M. Modulation of Insulin Resistance, Dyslipidemia and Serum Metabolome in iNOS Knockout Mice following Treatment with Nitrite, Metformin, Pioglitazone, and a Combination of Ampicillin and Neomycin. Int J Mol Sci 2021; 23:195. [PMID: 35008623 PMCID: PMC8745663 DOI: 10.3390/ijms23010195] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 11/28/2021] [Accepted: 12/01/2021] [Indexed: 12/27/2022] Open
Abstract
Oxidative and nitrosative stress plays a pivotal role in the incidence of metabolic disorders. Studies from this lab and others in iNOS-/- mice have demonstrated occurrence of insulin resistance (IR), hyperglycemia and dyslipidemia highlighting the importance of optimal redox balance. The present study evaluates role of nitrite, L-arginine, antidiabetics (metformin, pioglitazone) and antibiotics (ampicillin-neomycin combination, metronidazole) on metabolic perturbations observed in iNOS-/- mice. The animals were monitored for glucose tolerance (IPGTT), IR (insulin, HOMA-IR, QUICKI), circulating lipids and serum metabolomics (LC-MS). Hyperglycemia, hyperinsulinemia and IR were rescued by nitrite, antidiabetics, and antibiotics treatments in iNOS-/- mice. Glucose intolerance was improved with nitrite, metformin and pioglitazone treatment, while ampicillin-neomycin combination normalised the glucose utilization in iNOS-/- mice. Increased serum phosphatidylethanolamine lipids in iNOS-/- mice were reversed by metformin, pioglitazone and ampicillin-neomycin; dyslipidemia was however marginally improved by nitrite treatment. The metabolic improvements were associated with changes in selected serum metabolites-purines, ceramide, 10-hydroxydecanoate, glucosaminate, diosmetin, sebacic acid, 3-nitrotyrosine and cysteamine. Bacterial metabolites-hippurate, indole-3-ethanol; IR marker-aminoadipate and oxidative stress marker-ophthalmate were reduced by pioglitazone and ampicillin-neomycin, but not by nitrite and metformin treatment. Results obtained in the present study suggest a crucial role of gut microbiota in the metabolic perturbations observed in iNOS-/- mice.
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Affiliation(s)
- Hobby Aggarwal
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow 226031, India; (H.A.); (P.P.); (K.J.)
| | - Priya Pathak
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow 226031, India; (H.A.); (P.P.); (K.J.)
| | - Yashwant Kumar
- Non-Communicable Diseases Division, Translational Health Science and Technology Institute, Faridabad 121001, India;
| | - Kumaravelu Jagavelu
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow 226031, India; (H.A.); (P.P.); (K.J.)
| | - Madhu Dikshit
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow 226031, India; (H.A.); (P.P.); (K.J.)
- Non-Communicable Diseases Division, Translational Health Science and Technology Institute, Faridabad 121001, India;
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25
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Averina OV, Poluektova EU, Marsova MV, Danilenko VN. Biomarkers and Utility of the Antioxidant Potential of Probiotic Lactobacilli and Bifidobacteria as Representatives of the Human Gut Microbiota. Biomedicines 2021; 9:1340. [PMID: 34680457 PMCID: PMC8533434 DOI: 10.3390/biomedicines9101340] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/12/2021] [Accepted: 09/22/2021] [Indexed: 12/12/2022] Open
Abstract
Lactobacilli and bifidobacteria are an important part of human gut microbiota. Among numerous benefits, their antioxidant properties are attracting more and more attention. Multiple in vivo and in vitro studies have demonstrated that lactobacilli and bifidobacteria, along with their cellular components, possess excellent antioxidant capacity, which provides a certain degree of protection to the human body against diseases associated with oxidative stress. Recently, lactobacilli and bifidobacteria have begun to be considered as a new source of natural antioxidants. This review summarizes the current state of research on various antioxidant properties of lactobacilli and bifidobacteria. Special emphasis is given to the mechanisms of antioxidant activity of these bacteria in the human gut microbiota, which involve bacterial cell components and metabolites. This review is also dedicated to the genes involved in the antioxidant properties of lactobacilli and bifidobacteria strains as indicators of their antioxidant potential in human gut microbiota. Identification of the antioxidant biomarkers of the gut microbiota is of great importance both for creating diagnostic systems for assessing oxidative stress and for choosing strategies aimed at restoring the normal functioning of the microbiota and, through it, restoring human health. In this review, the practical application of probiotic strains with proven antioxidant properties to prevent oxidative stress is also considered.
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Affiliation(s)
- Olga V. Averina
- Vavilov Institute of General Genetics, Russion Academy of Sciences, 119991 Moscow, Russia; (E.U.P.); (M.V.M.); (V.N.D.)
| | - Elena U. Poluektova
- Vavilov Institute of General Genetics, Russion Academy of Sciences, 119991 Moscow, Russia; (E.U.P.); (M.V.M.); (V.N.D.)
| | - Mariya V. Marsova
- Vavilov Institute of General Genetics, Russion Academy of Sciences, 119991 Moscow, Russia; (E.U.P.); (M.V.M.); (V.N.D.)
| | - Valery N. Danilenko
- Vavilov Institute of General Genetics, Russion Academy of Sciences, 119991 Moscow, Russia; (E.U.P.); (M.V.M.); (V.N.D.)
- Institute of Ecology, Peoples’ Friendship University of Russia (RUDN University), 117198 Moscow, Russia
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26
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Otten AT, Bourgonje AR, Peters V, Alizadeh BZ, Dijkstra G, Harmsen HJM. Vitamin C Supplementation in Healthy Individuals Leads to Shifts of Bacterial Populations in the Gut-A Pilot Study. Antioxidants (Basel) 2021; 10:antiox10081278. [PMID: 34439526 PMCID: PMC8389205 DOI: 10.3390/antiox10081278] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/06/2021] [Accepted: 08/10/2021] [Indexed: 12/12/2022] Open
Abstract
Gut microbes are crucial to human health, but microbial composition is often disturbed in a number of human diseases. Accumulating evidence points to nutritional modulation of the gut microbiota as a potentially beneficial therapeutic strategy. Vitamin C (ascorbic acid) may be of particular interest as it has known antioxidant and anti-inflammatory properties. In this study, we investigated whether supplementation with high-dose vitamin C may favourably affect the composition of the gut microbiota. In this pilot study, healthy human participants received 1000 mg vitamin C supplementation daily for two weeks. Gut microbiota composition was analysed before and after intervention by performing faecal 16S rRNA gene sequencing. In total, 14 healthy participants were included. Daily supplementation of high-dose vitamin C led to an increase in the relative abundances of Lachnospiraceae (p < 0.05), whereas decreases were observed for Bacteroidetes (p < 0.01), Enterococci (p < 0.01) and Gemmiger formicilis (p < 0.05). In addition, trends for bacterial shifts were observed for Blautia (increase) and Streptococcus thermophilus (decrease). High-dose vitamin C supplementation for two weeks shows microbiota-modulating effects in healthy individuals, with several beneficial shifts of bacterial populations. This may be relevant as these bacteria have anti-inflammatory properties and strongly associate with gut health.
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Affiliation(s)
- Antonius T. Otten
- Department of Gastroenterology and Hepatology, University of Groningen, University Medical Center Groningen, 9713 GZ Groningen, The Netherlands; (A.T.O.); (A.R.B.); (V.P.); (G.D.)
| | - Arno R. Bourgonje
- Department of Gastroenterology and Hepatology, University of Groningen, University Medical Center Groningen, 9713 GZ Groningen, The Netherlands; (A.T.O.); (A.R.B.); (V.P.); (G.D.)
| | - Vera Peters
- Department of Gastroenterology and Hepatology, University of Groningen, University Medical Center Groningen, 9713 GZ Groningen, The Netherlands; (A.T.O.); (A.R.B.); (V.P.); (G.D.)
- Department of Epidemiology, University of Groningen, University Medical Center Groningen, 9713 GZ Groningen, The Netherlands;
| | - Behrooz Z. Alizadeh
- Department of Epidemiology, University of Groningen, University Medical Center Groningen, 9713 GZ Groningen, The Netherlands;
| | - Gerard Dijkstra
- Department of Gastroenterology and Hepatology, University of Groningen, University Medical Center Groningen, 9713 GZ Groningen, The Netherlands; (A.T.O.); (A.R.B.); (V.P.); (G.D.)
| | - Hermie J. M. Harmsen
- Department of Medical Microbiology, University of Groningen, University Medical Center Groningen, 9713 GZ Groningen, The Netherlands
- Correspondence: ; Tel.: +31-50-361-3480
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27
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Signore MA, De Pascali C, Giampetruzzi L, Siciliano PA, Francioso L. Gut-on-Chip microphysiological systems: Latest advances in the integration of sensing strategies and adoption of mature detection mechanisms. SENSING AND BIO-SENSING RESEARCH 2021. [DOI: 10.1016/j.sbsr.2021.100443] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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28
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Kort R, Schlösser J, Vazquez AR, Atukunda P, Muhoozi GKM, Wacoo AP, Sybesma WFH, Westerberg AC, Iversen PO, Schoen ED. Model Selection Reveals the Butyrate-Producing Gut Bacterium Coprococcus eutactus as Predictor for Language Development in 3-Year-Old Rural Ugandan Children. Front Microbiol 2021; 12:681485. [PMID: 34149673 PMCID: PMC8206532 DOI: 10.3389/fmicb.2021.681485] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 05/10/2021] [Indexed: 01/14/2023] Open
Abstract
Introduction The metabolic activity of the gut microbiota plays a pivotal role in the gut-brain axis through the effects of bacterial metabolites on brain function and development. In this study we investigated the association of gut microbiota composition with language development of 3-year-old rural Ugandan children. Methods We studied the language ability in 139 children of 36 months in our controlled maternal education intervention trial to stimulate children’s growth and development. The dataset includes 1170 potential predictors, including anthropometric and cognitive parameters at 24 months, 542 composition parameters of the children’s gut microbiota at 24 months and 621 of these parameters at 36 months. We applied a novel computationally efficient version of the all-subsets regression methodology and identified predictors of language ability of 36-months-old children scored according to the Bayley Scales of Infant and Toddler Development (BSID-III). Results The best three-term model, selected from more than 266 million models, includes the predictors Coprococcus eutactus at 24 months of age, Bifidobacterium at 36 months of age, and language development at 24 months. The top 20 four-term models, selected from more than 77 billion models, consistently include C. eutactus abundance at 24 months, while 14 of these models include the other two predictors as well. Mann–Whitney U tests suggest that the abundance of gut bacteria in language non-impaired children (n = 78) differs from that in language impaired children (n = 61). While anaerobic butyrate-producers, including C. eutactus, Faecalibacterium prausnitzii, Holdemanella biformis, Roseburia hominis are less abundant, facultative anaerobic bacteria, including Granulicatella elegans, Escherichia/Shigella and Campylobacter coli, are more abundant in language impaired children. The overall predominance of oxygen tolerant species in the gut microbiota was slightly higher in the language impaired group than in the non-impaired group (P = 0.09). Conclusion Application of the all-subsets regression methodology to microbiota data established a correlation between the relative abundance of the anaerobic butyrate-producing gut bacterium C. eutactus and language development in Ugandan children. We propose that the gut redox potential and the overall bacterial butyrate-producing capacity in the gut are important factors for language development.
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Affiliation(s)
- Remco Kort
- Department of Molecular Cell Biology, Vrije Universiteit Amsterdam, Amsterdam, Netherlands.,Yoba for Life Foundation, Amsterdam, Netherlands.,ARTIS-Micropia, Amsterdam, Netherlands
| | - Job Schlösser
- Department of Molecular Cell Biology, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Alan R Vazquez
- Faculty of Bioscience Engineering, KU Leuven, Leuven, Belgium
| | - Prudence Atukunda
- Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
| | - Grace K M Muhoozi
- Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway.,Department of Human Nutrition and Home Economics, Kyambogo University, Kampala, Uganda
| | - Alex Paul Wacoo
- Department of Molecular Cell Biology, Vrije Universiteit Amsterdam, Amsterdam, Netherlands.,Yoba for Life Foundation, Amsterdam, Netherlands.,Department of Medical Biochemistry, Makerere University, Kampala, Uganda
| | | | - Ane C Westerberg
- Institute of Health Sciences, Kristiania University College, Oslo, Norway
| | - Per Ole Iversen
- Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway.,Department of Hematology, Oslo University Hospital, Oslo, Norway
| | - Eric D Schoen
- Faculty of Bioscience Engineering, KU Leuven, Leuven, Belgium
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29
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Van Buiten CB, Wu G, Lam YY, Zhao L, Raskin I. Elemental iron modifies the redox environment of the gastrointestinal tract: A novel therapeutic target and test for metabolic syndrome. Free Radic Biol Med 2021; 168:203-213. [PMID: 33831549 PMCID: PMC8544024 DOI: 10.1016/j.freeradbiomed.2021.03.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/25/2021] [Accepted: 03/24/2021] [Indexed: 12/21/2022]
Abstract
Metabolic syndrome (MetS, i.e., type 2 diabetes and obesity) is often associated with dysbiosis, inflammation, and leaky gut syndrome, which increase the content of oxygen and reactive oxygen species (ROS) in the gastrointestinal (GI) tract. Using near-infrared fluorescent, in situ imaging of ROS, we evaluated the effects of oral administration of elemental iron powder (Fe0) on luminal ROS in the GI tract and related these changes to glucose metabolism and the gut microbiome. C57Bl/6J mice fed low-fat or high-fat diets and gavaged with Fe0 (2.5 g per kg), in both single- and repeat-doses, demonstrated decreased levels of luminal ROS. Fourteen days of repeated Fe0 administration reduced hyperglycemia and improved glucose tolerance in the obese and hyperglycemic animals compared to the untreated obese controls and reduced the relative amount of iron oxides in the feces, which indicated an increased redox environment of the GI tract. We determined that Fe0 administration can also be used as a diagnostic assay to assess the GI microenvironment. Improved metabolic outcomes and decreased gastrointestinal ROS in Fe0-treated, high-fat diet-fed animals correlated with the increase in a co-abundance group of beneficial bacteria, including Lactobacillus, and the suppression of detrimental populations, including Oscillibacter, Peptococcus, and Intestinimonas. Daily Fe0 treatment also increased the relative abundance of amplicon sequence variants that lacked functional enzymatic antioxidant systems, which is consistent with the ability of Fe0 to scavenge ROS and oxygen in the GI, thus favoring the growth of oxygen-sensitive bacteria. These findings delineate a functional role for antioxidants in modification of the GI microenvironment and subsequent reversal of metabolic dysfunction.
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Affiliation(s)
- Charlene B Van Buiten
- Department of Food Science and Human Nutrition, College of Health and Human Sciences, Colorado State University, Fort Collins, CO, 80525, USA; Department of Plant Biology, School of Environmental and Biological Sciences, Rutgers University, New Brunswick, NJ, 08901, USA.
| | - Guojun Wu
- Department of Biochemistry and Microbiology, School of Environmental and Biological Sciences, Rutgers University, New Brunswick, NJ, 08901, USA; Center for Microbiome, Nutrition and Health, New Jersey Institute for Food, Nutrition and Health, Rutgers University, New Brunswick, NJ, 80901, USA
| | - Yan Y Lam
- Department of Biochemistry and Microbiology, School of Environmental and Biological Sciences, Rutgers University, New Brunswick, NJ, 08901, USA; Center for Microbiome, Nutrition and Health, New Jersey Institute for Food, Nutrition and Health, Rutgers University, New Brunswick, NJ, 80901, USA
| | - Liping Zhao
- Department of Biochemistry and Microbiology, School of Environmental and Biological Sciences, Rutgers University, New Brunswick, NJ, 08901, USA; Center for Microbiome, Nutrition and Health, New Jersey Institute for Food, Nutrition and Health, Rutgers University, New Brunswick, NJ, 80901, USA
| | - Ilya Raskin
- Department of Plant Biology, School of Environmental and Biological Sciences, Rutgers University, New Brunswick, NJ, 08901, USA
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30
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Mach N, Baranowski E, Nouvel LX, Citti C. The Airway Pathobiome in Complex Respiratory Diseases: A Perspective in Domestic Animals. Front Cell Infect Microbiol 2021; 11:583600. [PMID: 34055660 PMCID: PMC8160460 DOI: 10.3389/fcimb.2021.583600] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 04/30/2021] [Indexed: 12/19/2022] Open
Abstract
Respiratory infections in domestic animals are a major issue for veterinary and livestock industry. Pathogens in the respiratory tract share their habitat with a myriad of commensal microorganisms. Increasing evidence points towards a respiratory pathobiome concept, integrating the dysbiotic bacterial communities, the host and the environment in a new understanding of respiratory disease etiology. During the infection, the airway microbiota likely regulates and is regulated by pathogens through diverse mechanisms, thereby acting either as a gatekeeper that provides resistance to pathogen colonization or enhancing their prevalence and bacterial co-infectivity, which often results in disease exacerbation. Insight into the complex interplay taking place in the respiratory tract between the pathogens, microbiota, the host and its environment during infection in domestic animals is a research field in its infancy in which most studies are focused on infections from enteric pathogens and gut microbiota. However, its understanding may improve pathogen control and reduce the severity of microbial-related diseases, including those with zoonotic potential.
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Affiliation(s)
- Núria Mach
- Université Paris-Saclay, Institut National de Recherche Pour l'Agriculture, l'Alimentation et l'Environnement (INRAE), AgroParisTech, Génétique Animale et Biologie Intégrative, Jouy-en-Josas, France
| | - Eric Baranowski
- Interactions Hôtes-Agents Pathogènes (IHAP), Université de Toulouse, INRAE, ENVT, Toulouse, France
| | - Laurent Xavier Nouvel
- Interactions Hôtes-Agents Pathogènes (IHAP), Université de Toulouse, INRAE, ENVT, Toulouse, France
| | - Christine Citti
- Interactions Hôtes-Agents Pathogènes (IHAP), Université de Toulouse, INRAE, ENVT, Toulouse, France
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Pham VT, Calatayud M, Rotsaert C, Seifert N, Richard N, Van den Abbeele P, Marzorati M, Steinert RE. Antioxidant Vitamins and Prebiotic FOS and XOS Differentially Shift Microbiota Composition and Function and Improve Intestinal Epithelial Barrier In Vitro. Nutrients 2021; 13:nu13041125. [PMID: 33805552 PMCID: PMC8066074 DOI: 10.3390/nu13041125] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 03/22/2021] [Accepted: 03/25/2021] [Indexed: 12/14/2022] Open
Abstract
Human gut microbiota (HGM) play a significant role in health and disease. Dietary components, including fiber, fat, proteins and micronutrients, can modulate HGM. Much research has been performed on conventional prebiotics such as fructooligosaccharides (FOS) and galactooligosaccharides (GOS), however, novel prebiotics or micronutrients still require further validation. We assessed the effect of FOS, xylooligosaccharides (XOS) and a mixture of an antioxidant vitamin blend (AOB) on gut microbiota composition and activity, and intestinal barrier in vitro. We used batch fermentations and tested the short-term effect of different products on microbial activity in six donors. Next, fecal inocula from two donors were used to inoculate the simulator of the human microbial ecosystem (SHIME) and after long-term exposure of FOS, XOS and AOB, microbial activity (short- and branched-chain fatty acids and lactate) and HGM composition were evaluated. Finally, in vitro assessment of intestinal barrier was performed in a Transwell setup of differentiated Caco-2 and HT29-MTX-E12 cells exposed to fermentation supernatants. Despite some donor-dependent differences, all three tested products showed beneficial modulatory effects on microbial activity represented by an increase in lactate and SCFA levels (acetate, butyrate and to a lesser extent also propionate), while decreasing proteolytic markers. Bifidogenic effect of XOS was consistent, while AOB supplementation appears to exert a specific impact on reducing F. nucleatum and increasing butyrate-producing B. wexlerae. Functional and compositional microbial changes were translated to an in vitro host response by increases of the intestinal barrier integrity by all the products and a decrease of the redox potential by AOB supplementation.
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Affiliation(s)
- Van T. Pham
- R&D Human Nutrition and Health, DSM Nutritional Products Ltd., 4002 Basel, Switzerland; (N.S.); (N.R.); (R.E.S.)
- Correspondence: ; Tel.: +41-618-158-828
| | - Marta Calatayud
- ProDigest BV, Technologiepark 82, 9052 Ghent, Belgium; (M.C.); (C.R.); (P.V.d.A.); (M.M.)
| | - Chloë Rotsaert
- ProDigest BV, Technologiepark 82, 9052 Ghent, Belgium; (M.C.); (C.R.); (P.V.d.A.); (M.M.)
| | - Nicole Seifert
- R&D Human Nutrition and Health, DSM Nutritional Products Ltd., 4002 Basel, Switzerland; (N.S.); (N.R.); (R.E.S.)
| | - Nathalie Richard
- R&D Human Nutrition and Health, DSM Nutritional Products Ltd., 4002 Basel, Switzerland; (N.S.); (N.R.); (R.E.S.)
| | - Pieter Van den Abbeele
- ProDigest BV, Technologiepark 82, 9052 Ghent, Belgium; (M.C.); (C.R.); (P.V.d.A.); (M.M.)
| | - Massimo Marzorati
- ProDigest BV, Technologiepark 82, 9052 Ghent, Belgium; (M.C.); (C.R.); (P.V.d.A.); (M.M.)
- Center for Microbial Ecology and Technology (CMET), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium
| | - Robert E. Steinert
- R&D Human Nutrition and Health, DSM Nutritional Products Ltd., 4002 Basel, Switzerland; (N.S.); (N.R.); (R.E.S.)
- Department of Surgery, Division of Visceral and Transplantation Surgery, University Hospital Zurich, 8006 Zurich, Switzerland
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33
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Intestinal bacteria are potential biomarkers and therapeutic targets for gastric cancer. Microb Pathog 2021; 151:104747. [PMID: 33484807 DOI: 10.1016/j.micpath.2021.104747] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 01/12/2021] [Accepted: 01/13/2021] [Indexed: 12/13/2022]
Abstract
The diagnostic and therapeutic role of intestinal microbiota in gastric carcinogenesis remains unclear. In this study, feces from gastric cancer patients and healthy people were sequenced for microbiota analysis, and the correlation between fecal bacteria and the occurrence of gastric cancer was explored. The β-diversity results showed that microbial compositions varied between gastric cancer patients and healthy people. Interestingly, the dissection of microbial structure revealed that all facultative anaerobic genera with relatively high abundances expanded significantly in gastric cancer patients. The succeeding correlation analysis demonstrated a distorted interaction of intestinal bacteria in gastric cancer. The application of some differential bacteria, Desulfovibrio, Escherichia, Faecalibacterium or Oscillospira, as biomarkers to predict gastric cancer could all reach an accuracy of 0.900 or above. The shift in Desulfovibrio was specifically verified by qPCR in newly collected fecal samples, and the patients with stage IV gastric cancer were identified to have significantly more Desulfovibrio than those with stage I, II and III gastric cancer. The possible role of Desulfovibrio in gastric cancer was assessed with H2S-treated HT-29 cells, and the results showed that H2S induced NO, IL-1β and IL-18 production, which is important for inflammation promotion and can be delivered through the bloodstream. This study suggests a correlation of intestinal microbiota and the development of gastric cancer.
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Chen Z, Maqbool J, Sajid F, Hussain G, Sun T. Human gut microbiota and its association with pathogenesis and treatments of neurodegenerative diseases. Microb Pathog 2020; 150:104675. [PMID: 33352217 DOI: 10.1016/j.micpath.2020.104675] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 11/23/2020] [Accepted: 11/25/2020] [Indexed: 02/07/2023]
Abstract
Human gut microbiota consists of various microorganisms whose numbers are similar to those of human cells. Human gut microbes and the brain form bidirectional communications through the brain-gut-axis, and play a central role in normal physiological processes and in pathogenesis of many human diseases. Accumulating evidence has demonstrated the crucial effect of gut microbes in proper brain functions and under disease conditions. Here we first focus on revealing current knowledge of the role of gut microbes in neural development and functions. We then summarize mutual relationships between gut microbes and human diseases, in particular neurodegenerative disorders such as Alzheimer's disease, Parkinson's disease and Multiple sclerosis. Finally, we highlight ongoing studies in exploring gut microbes in treatments of human diseases. Applying gut microbes as a means in treatment of human diseases is becoming a promising research direction, and has a great potential in clinical practice.
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Affiliation(s)
- Zhong Chen
- Center for Precision Medicine, School of Medicine and School of Biomedical Sciences, Huaqiao University, Xiamen, Fujian, 361021, China
| | - Javeria Maqbool
- Neurochemicalbiology and Genetics Laboratory (NGL), Department of Physiology, Faculty of Life Sciences, Government College University, Faisalabad, Pakistan
| | - Faiqa Sajid
- Neurochemicalbiology and Genetics Laboratory (NGL), Department of Physiology, Faculty of Life Sciences, Government College University, Faisalabad, Pakistan
| | - Ghulam Hussain
- Neurochemicalbiology and Genetics Laboratory (NGL), Department of Physiology, Faculty of Life Sciences, Government College University, Faisalabad, Pakistan
| | - Tao Sun
- Center for Precision Medicine, School of Medicine and School of Biomedical Sciences, Huaqiao University, Xiamen, Fujian, 361021, China.
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Facchin S, Vitulo N, Calgaro M, Buda A, Romualdi C, Pohl D, Perini B, Lorenzon G, Marinelli C, D’Incà R, Sturniolo GC, Savarino EV. Microbiota changes induced by microencapsulated sodium butyrate in patients with inflammatory bowel disease. Neurogastroenterol Motil 2020; 32:e13914. [PMID: 32476236 PMCID: PMC7583468 DOI: 10.1111/nmo.13914] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 04/06/2020] [Accepted: 05/11/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND Butyrate has shown anti-inflammatory and regenerative properties, providing symptomatic relief when orally supplemented in patients suffering from various colonic diseases. We investigated the effect of a colonic-delivery formulation of butyrate on the fecal microbiota of patients with inflammatory bowel diseases (IBDs). METHODS In this double-blind, placebo-controlled, pilot study, 49 IBD patients (n = 19 Crohn's disease, CD and n = 30 ulcerative colitis, UC) were randomized to oral administration of microencapsulated-sodium-butyrate (BLM) or placebo for 2 months, in addition to conventional therapy. Eighteen healthy volunteers (HVs) were recruited to provide a healthy microbiota model of the local people. Fecal microbiota from stool samples was assessed by 16S sequencing. Clinical disease activity and quality of life (QoL) were evaluated before and after treatment. KEY RESULTS At baseline, HVs showed a different microbiota composition compared with IBD patients. Sodium-butyrate altered the gut microbiota of IBD patients by increasing bacteria able to produce SCFA in UC patients (Lachnospiraceae spp.) and the butyrogenic colonic bacteria in CD patients (Butyricicoccus). In UC patients, QoL was positively affected by treatment. CONCLUSIONS AND INFERENCES Sodium-butyrate supplementation increases the growth of bacteria able to produce SCFA with potentially anti-inflammatory action. The clinical impact of this finding requires further investigation.
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Affiliation(s)
- Sonia Facchin
- Department of Surgery, Oncology and Gastroenterology (DISCOG)University Hospital of PaduaPaduaItaly
| | - Nicola Vitulo
- Department of BiotechnologyUniversity of VeronaVeronaItaly
| | - Matteo Calgaro
- Department of BiotechnologyUniversity of VeronaVeronaItaly
| | - Andrea Buda
- Department of Surgery, Oncology and Gastroenterology (DISCOG)University Hospital of PaduaPaduaItaly
| | | | - Daniel Pohl
- Department of GastroenterologyUniversity Hospital ZurichZurichSwitzerland
| | - Barbara Perini
- Department of Surgery, Oncology and Gastroenterology (DISCOG)University Hospital of PaduaPaduaItaly
| | - Greta Lorenzon
- Department of Surgery, Oncology and Gastroenterology (DISCOG)University Hospital of PaduaPaduaItaly
| | - Carla Marinelli
- Department of Surgery, Oncology and Gastroenterology (DISCOG)University Hospital of PaduaPaduaItaly
| | - Renata D’Incà
- Department of Surgery, Oncology and Gastroenterology (DISCOG)University Hospital of PaduaPaduaItaly
| | - Giacomo Carlo Sturniolo
- Department of Surgery, Oncology and Gastroenterology (DISCOG)University Hospital of PaduaPaduaItaly
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The Antioxidants Glutathione, Ascorbic Acid and Uric Acid Maintain Butyrate Production by Human Gut Clostridia in The Presence of Oxygen In Vitro. Sci Rep 2020; 10:7705. [PMID: 32382092 PMCID: PMC7205886 DOI: 10.1038/s41598-020-64834-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 04/13/2020] [Indexed: 12/23/2022] Open
Abstract
Uncontrolled oxidative stress, reported in Salmonella and HIV infections, colorectal cancer or severe acute malnutrition, has been associated with anaerobic gut microbiome alteration, impaired butyrate production, mucosal immunity dysregulation and disruption of host-bacterial mutualism. However, the role of major antioxidant molecules in the human body, such as glutathione, ascorbic acid and uric acid, has been neglected in this context. Here, we performed an in vitro metabolomics study of the 3 most odorous anaerobic microbes isolated from the human gut in our laboratory (Clostridium sporogenes, Clostridium subterminale and Romboutsia lituseburensis) when grown in anaerobiosis or in aerobiosis with these 3 antioxidant molecules via gas and liquid chromatography-mass spectrometry (GC/MS and LC/MS). There was no growth or volatile organic compound production in aerobic cultures without the 3 antioxidant molecules. In anaerobiosis, the major metabolic products of the bacteria were thiols, alcohols and short-chain fatty acid esters. The production of alkanes, cycloheptatriene and, paradoxically, increased butyrate production, was observed in the cultures grown in aerobiosis with the 3 antioxidant molecules. The qualitative shift suggests specific molecular mechanisms that remain to be elucidated. The increased production of butyrate, but also isobutyrate and isovalerate in vitro suggests that these 3 antioxidant molecules contributed to the maintenance and active resilience of host-bacterial mutualism against mucosal oxygen and uncontrolled oxidative stress in vivo.
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37
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Chung E, Elmassry MM, Kottapalli P, Kottapalli KR, Kaur G, Dufour JM, Wright K, Ramalingam L, Moustaid-Moussa N, Wang R, Hamood AN, Shen CL. Metabolic benefits of annatto-extracted tocotrienol on glucose homeostasis, inflammation, and gut microbiome. Nutr Res 2020; 77:97-107. [PMID: 32438021 DOI: 10.1016/j.nutres.2020.04.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 03/27/2020] [Accepted: 04/11/2020] [Indexed: 12/12/2022]
Abstract
Emerging evidence suggests that the gut microbiome plays an important role in the pathophysiology of both obesity and type 2 diabetes mellitus. We previously reported that dietary annatto-extracted tocotrienol exerts beneficial effects by modulating inflammatory responses in mice fed a high-fat diet (HFD). The purpose of this study was to test the hypothesis that tocotrienol supplementation when combined with an HFD would result in an altered gut microbiota composition. For 14 weeks, forty-eight male C57BL/6J mice were assigned to 4 groups-low-fat diet, HFD, HFD supplemented with annatto-extracted tocotrienol at 800 mg/kg diet (AT), and HFD supplemented with metformin at 200 mg/kg diet. Glucose homeostasis was assessed by glucose and insulin tolerance tests, serum and pancreas insulin levels, and histological assessments of insulin and glucagon in pancreatic tissue. The concentrations of adipokines were measured in white adipose tissues. For the gut microbiome analysis, cecal content was collected, DNA was extracted, and 16S rRNA gene sequencing was performed. AT supplementation improved glucose homeostasis and lowered resistin, leptin, and interleukin-6 levels in white adipose tissue. Relative to the HFD group, AT-supplemented mice showed a decrease in the Firmicutes to Bacteroidetes ratio and had a lower abundance of Ruminococcus lactaris, Dorea longicatena, and Lachnospiraceae family. The relative abundance of Akkermansia muciniphila was increased in the AT group compared to the low-fat diet group. The association between the metabolic improvements and the identified bacterial taxa suggests a potential metabolic modulation caused by AT supplementation through the gut microbiota composition in mice fed an HFD.
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Affiliation(s)
- Eunhee Chung
- Department of Kinesiology, Health, and Nutrition, University of Texas at San Antonio, San Antonio, TX.
| | - Moamen M Elmassry
- Department of Biological Sciences, Texas Tech University, Lubbock, TX.
| | | | | | - Gurvinder Kaur
- Department of Medical Education, Texas Tech University Health Sciences Center, Lubbock, TX; Center of Excellence for Integrative Health, Texas Tech University Health Sciences Center, Lubbock, TX; Obesity Research Institute, Texas Tech University, Lubbock, TX.
| | - Jannette M Dufour
- Department of Medical Education, Texas Tech University Health Sciences Center, Lubbock, TX; Center of Excellence for Integrative Health, Texas Tech University Health Sciences Center, Lubbock, TX; Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX; Obesity Research Institute, Texas Tech University, Lubbock, TX; Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX.
| | - Kandis Wright
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX.
| | - Latha Ramalingam
- Center of Excellence for Integrative Health, Texas Tech University Health Sciences Center, Lubbock, TX; Obesity Research Institute, Texas Tech University, Lubbock, TX; Department of Nutritional Sciences, Texas Tech University, Lubbock, TX.
| | - Naima Moustaid-Moussa
- Center of Excellence for Integrative Health, Texas Tech University Health Sciences Center, Lubbock, TX; Obesity Research Institute, Texas Tech University, Lubbock, TX; Department of Nutritional Sciences, Texas Tech University, Lubbock, TX.
| | - Rui Wang
- Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, TX.
| | - Abdul N Hamood
- Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX; Department of Surgery, Texas Tech University Health Sciences Center, Lubbock, TX.
| | - Chwan-Li Shen
- Center of Excellence for Integrative Health, Texas Tech University Health Sciences Center, Lubbock, TX; Obesity Research Institute, Texas Tech University, Lubbock, TX; Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, TX.
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The Microbiota-Gut-Brain Axis Heart Shunt Part I: The French Paradox, Heart Disease and the Microbiota. Microorganisms 2020; 8:microorganisms8040490. [PMID: 32235574 PMCID: PMC7232195 DOI: 10.3390/microorganisms8040490] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 03/04/2020] [Accepted: 03/09/2020] [Indexed: 12/16/2022] Open
Abstract
It has been well established that a vegetarian and polyphenol-rich diet, including fruits, vegetables, teas, juices, wine, indigestible fiber and whole grains, provide health-promoting phytochemicals and phytonutrients that are beneficial for the heart and brain. What is not well-characterized is the affect these foods have when co-metabolized within our dynamic gut and its colonizing flora. The concept of a heart shunt within the microbiota-gut-brain axis underscores the close association between brain and heart health and the so-called “French paradox” offers clues for understanding neurodegenerative and cerebrovascular diseases. Moreover, oxidation-redox reactions and redox properties of so-called brain and heart-protective foods are underappreciated as to their enhanced or deleterious mechanisms of action. Focusing on prodromal stages, and common mechanisms underlying heart, cerebrovascular and neurodegenerative diseases, we may unmask and understanding the means to better treat these related diseases.
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Steinert RE, Lee YK, Sybesma W. Vitamins for the Gut Microbiome. Trends Mol Med 2019; 26:137-140. [PMID: 31862244 DOI: 10.1016/j.molmed.2019.11.005] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 11/10/2019] [Accepted: 11/13/2019] [Indexed: 01/10/2023]
Abstract
A main target in microbiome research is the understanding and ability to safely and effectively modulate the microbiome to improve health. Hereto, we discuss the role of vitamins in relation to the gut microbiome and present a rationale for the modulation of gut microbial communities via selected systemic and colon-targeted vitamin administration.
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Affiliation(s)
- Robert E Steinert
- Human Nutrition and Health, DSM Nutritional Products Ltd, Basel, Switzerland; Department of Surgery, Division of Visceral and Transplantation Surgery, University Hospital Zürich, 8091 Zürich, Switzerland
| | - Yuan-Kun Lee
- Department of Microbiology and Immunology, Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, 117597, Singapore
| | - Wilbert Sybesma
- Human Nutrition and Health, DSM Nutritional Products Ltd, Basel, Switzerland; Yoba for Life Foundation, Hunzestraat 133-A, 1079 WB Amsterdam, The Netherlands.
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40
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Balmus IM, Lefter R, Ciobica A, Cojocaru S, Guenne S, Timofte D, Stanciu C, Trifan A, Hritcu L. Preliminary Biochemical Description of Brain Oxidative Stress Status in Irritable Bowel Syndrome Contention-Stress Rat Model. MEDICINA (KAUNAS, LITHUANIA) 2019; 55:medicina55120776. [PMID: 31817740 PMCID: PMC6956041 DOI: 10.3390/medicina55120776] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 11/29/2019] [Accepted: 12/04/2019] [Indexed: 02/05/2023]
Abstract
Background and objectives: Oxidative stress and inflammation have been implicated in the etiology of irritable bowel syndrome (IBS), a common gastrointestinal functional disease. This study aimed to further characterize the contention-stress rat model by exploring a possible correlation between oxidative stress markers measured in brain tissues with behavioral components of the aforementioned model. Thus, it is hereby proposed a possible IBS animal model relevant to pharmacological and complementary medicine studies. Materials and Methods: Wild-type male Wistar rats (n = 5/group) were chronically exposed to 6-hour/day contention, consisting of isolating the animals in small, vital space-granting plastic devices, for seven consecutive days. Following contention exposure, temporal lobes were extracted and subjected to biochemical analyses to assess oxidative stress-status parameters. Results: Our results show increased brain oxidative stress in contention-stress rat model: decreased superoxide dismutase and glutathione peroxidase activities and increased malondialdehyde production in the IBS group, as compared to the control group. Furthermore, the biochemical ratios which are used to evaluate the effectiveness of an antioxidant system on oxidative stress could be described in this model. Conclusions: The correlations between the behavioral patterns and biochemical oxidative stress features could suggest that this may be a complex model, which can successfully mimic IBS symptomatology further providing evidence of a strong connection between the digestive system, enteric nervous system, and the central nervous system.
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Affiliation(s)
- Ioana-Miruna Balmus
- Interdisciplinary Research Department–Field Science, “Alexandru Ioan Cuza” University of Iasi, Carol I Avenue, 20A, 700490 Iasi, Romania;
- Department of Research, Faculty of Biology, “Alexandru Ioan Cuza” University of Iasi, Carol I Avenue, 20A, 700490 Iasi, Romania;
| | - Radu Lefter
- Department of Research, Faculty of Biology, “Alexandru Ioan Cuza” University of Iasi, Carol I Avenue, 20A, 700490 Iasi, Romania;
- Romanian Academy, Iasi Branch, Nr. 8, Carol I Avenue, no. 8, 700490 Iasi, Romania;
| | - Alin Ciobica
- Department of Research, Faculty of Biology, “Alexandru Ioan Cuza” University of Iasi, Carol I Avenue, 20A, 700490 Iasi, Romania;
- Correspondence: or (A.C.); (D.T.)
| | - Sabina Cojocaru
- Department of Biology, Faculty of Biology, “Alexandru Ioan Cuza” University of Iasi, Carol I Avenue, 20A, 700490 Iasi, Romania;
| | - Samson Guenne
- Department of Biochemistry and Microbiology, University Ouaga I Pr Joseph KI-ZERBO, Dagnöen Nord, Ouagadougou BP 7021, Burkina Faso;
| | - Daniel Timofte
- Faculty of Medicine, “Gr. T. Popa” University of Medicine and Pharmacy, 6th University Street, 700490 Iasi, Romania
- Correspondence: or (A.C.); (D.T.)
| | - Carol Stanciu
- Romanian Academy, Iasi Branch, Nr. 8, Carol I Avenue, no. 8, 700490 Iasi, Romania;
| | - Anca Trifan
- Department of Gastroenterology, Faculty of Medicine, “Gr. T. Popa” University of Medicine and Pharmacy, 6th University Street, 700490 Iasi, Romania;
| | - Luminita Hritcu
- Department of Clinics, Faculty of Veterinary Medicine, University of Agricultural Sciences and Veterinary Medicine “Ion Ionescu de la Brad” of Iasi, 3rd Mihail Sadoveanu Alley, 700490 Iasi, Romania;
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Togo A, Dufour JC, Lagier JC, Dubourg G, Raoult D, Million M. Repertoire of human breast and milk microbiota: a systematic review. Future Microbiol 2019; 14:623-641. [PMID: 31025880 DOI: 10.2217/fmb-2018-0317] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Breastfeeding is a major determinant of human health. Breast milk is not sterile and ecological large-scale sequencing methods have revealed an unsuspected microbial diversity that plays an important role. However, microbiological analysis at the species level has been neglected while it is a prerequisite before understanding which microbe is associated with symbiosis or dysbiosis, and health or disease. We review the currently known bacterial repertoire from the human breast and milk microbiota using a semiautomated strategy. Total 242 articles from 38 countries, 11,124 women and 15,489 samples were included. Total 820 species were identified mainly composed of Proteobacteria and Firmicutes. We report variations according to the analytical method (culture or molecular method), the anatomical site (breast, colostrum or milk) and the infectious status (healthy control, mastitis, breast abscess, neonatal infection). In addition, we compared it with the other human repertoires. Finally, we discuss its putative origin and role in health and disease.
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Affiliation(s)
- Amadou Togo
- IHU-Méditerranée Infection, Marseille, France.,Aix Marseille Univ, IRD, APHM, MEPHI, Marseille, France
| | - Jean-Charles Dufour
- Aix Marseille Univ, APHM, INSERM, IRD, SESSTIM, Hop Timone, BioSTIC, Marseille, France
| | - Jean-Christophe Lagier
- IHU-Méditerranée Infection, Marseille, France.,Aix Marseille Univ, IRD, APHM, MEPHI, Marseille, France
| | - Gregory Dubourg
- IHU-Méditerranée Infection, Marseille, France.,Aix Marseille Univ, IRD, APHM, MEPHI, Marseille, France
| | - Didier Raoult
- IHU-Méditerranée Infection, Marseille, France.,Aix Marseille Univ, IRD, APHM, MEPHI, Marseille, France
| | - Matthieu Million
- IHU-Méditerranée Infection, Marseille, France.,Aix Marseille Univ, IRD, APHM, MEPHI, Marseille, France
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Metabolic improvement in obese patients after duodenal-jejunal exclusion is associated with intestinal microbiota composition changes. Int J Obes (Lond) 2019; 43:2509-2517. [PMID: 30765893 DOI: 10.1038/s41366-019-0336-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 12/21/2018] [Accepted: 01/16/2019] [Indexed: 12/23/2022]
Abstract
BACKGROUND Intestinal microbiota have been suggested to play an important role in the pathogenesis of obesity and type 2 diabetes. Bariatric surgery improves both conditions and has been associated with changes in intestinal microbiota composition. We investigated the effect of a nonsurgical bariatric technique on intestinal microbiota composition in relation to metabolic improvement. METHODS Seventeen patients with obesity and type 2 diabetes were treated with the nonsurgical duodenal-jejunal bypass liner, which excludes the proximal 60 cm small intestine from food. Fecal samples as well as metabolic parameters reflecting obesity and type 2 diabetes were obtained from the patients at baseline, after 6 months with the device in situ, and 6 months after explantation. RESULTS After 6 months of treatment, both obesity and type 2 diabetes had improved with a decrease in weight from 106.1 [99.4-123.5] to 97.4 [89.4-114.0] kg and a decrease in HbA1c from 8.5% [7.6-9.2] to 7.2% [6.3-8.1] (both p < 0.05). This was paralleled by an increased abundance of typical small intestinal bacteria such as Proteobacteria, Veillonella, and Lactobacillus spp. in feces. After removal of the duodenal-jejunal bypass liner, fecal microbiota composition was similar to that observed at baseline, despite persistent weight loss. CONCLUSION Improvement of obesity and type 2 diabetes after exclusion of the proximal 60 cm small intestine by treatment with a nonsurgical duodenal-jejunal bypass liner may be promoted by changes in fecal microbiota composition.
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