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Wu BY, Xu P, Cheng L, Wang QQ, Qiu HY, Yan XJ, Chen SL. Mucosa-Associated Microbiota Dysbiosis in the Terminal Ileum Correlates With Bowel Symptoms in Diarrhea-Predominant Irritable Bowel Syndrome. Clin Transl Gastroenterol 2024; 15:e00658. [PMID: 37937852 PMCID: PMC10887450 DOI: 10.14309/ctg.0000000000000658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 10/21/2023] [Indexed: 11/09/2023] Open
Abstract
INTRODUCTION The mucosa-associated microbiota (MAM) is not as frequently studied in diarrhea-predominant irritable bowel syndrome (IBS-D) compared with the fecal microbiota. In this study, we examined the MAM in the terminal ileum and its correlation with bowel symptoms in IBS-D. METHODS Mucosal biopsies of the terminal ileum from 25 patients with IBS-D and 25 healthy controls were collected for 16S ribosomal RNA gene sequencing. Correlation analysis was performed. RESULTS Compared with healthy controls, the MAM in the terminal ileum showed a decreased alpha diversity in the IBS-D cohort (Chao1 and Shannon indexes, P < 0.05). And the overall MAM profile clustered separately into 2 groups (ADONIS [PERMANOVA, permutational multivariate analysis of variance], P < 0.05). At the phylum level, the relative abundance of Proteobacteria was significantly higher in the ileal MAM of patients with IBS-D while that of Firmicutes was significantly lower. At the genus level, the relative abundance of Pseudomonas was significantly higher in the IBS-D cohort, with lower Bacteroides and Ruminococcus . Moreover, 40.0% of patients with IBS-D had multiple small nodules (nodular lymphoid hyperplasia) on the mucosal surface of the terminal ileum, which indicated a low-grade inflammation. In patients with IBS-D with nodular lymphoid hyperplasia, the changes of Pseudomonas and Bacteroides were more overt. Correlation analysis revealed that the relative abundance of Pseudomonas positively correlated with abdominal pain and the severity of IBS. DISCUSSION Patients with IBS-D showed a dysbiosis of MAM in the terminal ileum, which may be associated with bowel symptoms. Moreover, 40.0% of them displayed mucosal low-grade inflammation, with a more severe mucosal microbial disturbance.
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Affiliation(s)
- Bi-Yu Wu
- Division of Gastroenterology and Hepatology, NHC Key Laboratory of Digestive Diseases, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Institute of Digestive Disease, Shanghai, China
| | - Ping Xu
- Division of Gastroenterology and Hepatology, NHC Key Laboratory of Digestive Diseases, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Institute of Digestive Disease, Shanghai, China
| | - Li Cheng
- Division of Gastroenterology and Hepatology, NHC Key Laboratory of Digestive Diseases, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Institute of Digestive Disease, Shanghai, China
| | - Qian-Qian Wang
- Division of Gastroenterology and Hepatology, NHC Key Laboratory of Digestive Diseases, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Institute of Digestive Disease, Shanghai, China
| | - Hong-Yi Qiu
- Division of Gastroenterology and Hepatology, NHC Key Laboratory of Digestive Diseases, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Institute of Digestive Disease, Shanghai, China
| | - Xiu-Juan Yan
- Division of Gastroenterology and Hepatology, NHC Key Laboratory of Digestive Diseases, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Institute of Digestive Disease, Shanghai, China
| | - Sheng-Liang Chen
- Division of Gastroenterology and Hepatology, NHC Key Laboratory of Digestive Diseases, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Institute of Digestive Disease, Shanghai, China
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Dold L, Frank L, Lutz P, Kaczmarek DJ, Krämer B, Nattermann J, Weismüller TJ, Branchi V, Toma M, Gonzalez-Carmona M, Strassburg CP, Spengler U, Langhans B. IL-6-Dependent STAT3 Activation and Induction of Proinflammatory Cytokines in Primary Sclerosing Cholangitis. Clin Transl Gastroenterol 2023; 14:e00603. [PMID: 37256725 PMCID: PMC10461951 DOI: 10.14309/ctg.0000000000000603] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 05/04/2023] [Indexed: 06/02/2023] Open
Abstract
INTRODUCTION Primary sclerosing cholangitis (PSC) is a rare cholestatic liver disease with periductal inflammation and fibrosis. Genetic studies suggest inflammatory cytokines and IL-6-dependent activation of transcription factor STAT3 as pivotal steps in PSC pathogenesis. However, details of inflammatory regulation remain unclear. METHODS We recruited 50 patients with PSC (36 with inflammatory bowel disease, 14 without inflammatory bowel disease), 12 patients with autoimmune hepatitis, and 36 healthy controls to measure cytokines in the serum, bile, and immune cell supernatant using bead-based immunoassays and flow cytometry and immunohistochemistry to analyze phosphorylation of STATs in immune cells. Finally, we analyzed cytokines and STAT3 phosphorylation of T cells in the presence of JAK1/2 inhibitors. RESULTS In PSC, IL-6 specifically triggered phosphorylation of STAT3 in CD4 + T cells and lead to enhanced production of interferon (IFN) gamma and interleukin (IL)-17A. Phospho-STAT3-positive CD4 + T cells correlated with systemic inflammation (C-reactive protein serum levels). Combination of immunohistology and flow cytometry indicated that phospho-STAT3-positive cells were enriched in the peribiliary liver stroma and represented CD4 + T cells with prominent production of IFN gamma and IL-17A. JAK1/2 inhibitors blocked STAT3 phosphorylation and production of IFN gamma and IL-6, whereas IL-17A was apparently resistant to this inhibition. DISCUSSION Our results demonstrate systemic and local activation of the IL-6/STAT3 pathway in PSC. Resistance of IL-17A to STAT3-targeted inhibition points to a more complex immune dysregulation beyond STAT3 activation.
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Affiliation(s)
- Leona Dold
- Department of Internal Medicine I, University Hospital of Bonn, Bonn, Germany;
- German Center for Infection Research (DZIF), Partner Site Cologne-Bonn, Bonn, Germany;
| | - Leonie Frank
- Department of Internal Medicine I, University Hospital of Bonn, Bonn, Germany;
| | - Philipp Lutz
- Department of Internal Medicine I, University Hospital of Bonn, Bonn, Germany;
| | | | - Benjamin Krämer
- Department of Internal Medicine I, University Hospital of Bonn, Bonn, Germany;
| | - Jacob Nattermann
- Department of Internal Medicine I, University Hospital of Bonn, Bonn, Germany;
- German Center for Infection Research (DZIF), Partner Site Cologne-Bonn, Bonn, Germany;
| | - Tobias J. Weismüller
- Department of Internal Medicine - Gastroenterology and Oncology, Vivantes Humboldt Hospital, Berlin, Germany;
| | - Vittorio Branchi
- Department of General, Abdominal, Thoracic and Vascular Surgery, University Hospital Bonn, Bonn, Germany;
| | - Marieta Toma
- Institute of Pathology, University Hospital Bonn, Bonn, Germany.
| | | | | | - Ulrich Spengler
- Department of Internal Medicine I, University Hospital of Bonn, Bonn, Germany;
| | - Bettina Langhans
- Department of Internal Medicine I, University Hospital of Bonn, Bonn, Germany;
- German Center for Infection Research (DZIF), Partner Site Cologne-Bonn, Bonn, Germany;
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Dovrolis N, Moschoviti A, Fessatou S, Karamanolis G, Kolios G, Gazouli M. Identifying Microbiome Dynamics in Pediatric IBD: More than a Family Matter. Biomedicines 2023; 11:1979. [PMID: 37509618 PMCID: PMC10377534 DOI: 10.3390/biomedicines11071979] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 07/09/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023] Open
Abstract
BACKGROUND Pediatric inflammatory bowel disease (IBD) is a chronic inflammatory intestinal disease that affects both children and adolescents. Symptoms can significantly affect a child's growth, development, and quality of life, making early diagnosis and effective management crucial. This study focuses on treatment-naïve pediatric IBD patients and their immediate families to identify the role of the microbiome in disease onset. METHODS Nine families with pediatric IBD were recruited, comprising seven drug-naïve Crohn's disease (CD) patients and two drug-naïve ulcerative colitis (UC) patients, as well as twenty-four healthy siblings/parents. Fecal samples were collected for 16S ribosomal RNA gene sequencing and bioinformatics analysis. RESULTS We identified patterns of dysbiosis and hallmark microbial taxa among patients who shared ethnic, habitual, and dietary traits with themselves and their families. In addition, we examined the impact of the disease on specific microbial taxa and how these could serve as potential biomarkers for early detection. CONCLUSIONS Our results suggest a potential role of maternal factors in the establishment and modulation of the early life microbiome, consistent with the current literature, which may have implications for understanding the etiology and progression of IBD.
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Affiliation(s)
- Nikolas Dovrolis
- Laboratory of Pharmacology, Department of Medicine, Democritus University of Thrace, 68100 Alexandroupolis, Greece
- Individualised Medicine & Pharmacological Research Solutions Center (IMPReS), 68100 Alexandroupolis, Greece
| | - Anastasia Moschoviti
- Third Department of Pediatrics, "Attikon" General University Hospital, Medical School, National and Kapodistrian University of Athens, 12462 Haidari, Greece
| | - Smaragdi Fessatou
- Third Department of Pediatrics, "Attikon" General University Hospital, Medical School, National and Kapodistrian University of Athens, 12462 Haidari, Greece
| | - George Karamanolis
- Gastroenterology Unit, Second Department of Surgery, Aretaieio Hospital, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
| | - George Kolios
- Laboratory of Pharmacology, Department of Medicine, Democritus University of Thrace, 68100 Alexandroupolis, Greece
- Individualised Medicine & Pharmacological Research Solutions Center (IMPReS), 68100 Alexandroupolis, Greece
| | - Maria Gazouli
- Laboratory of Biology, Department of Basic Medical Sciences, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
- School of Science and Technology, Hellenic Open University, 26335 Patra, Greece
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4
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Lin KKY, Chen HC, Chen SH. Comparison of ileocolon flap and jejunum flap for voice reconstruction. Microsurgery 2023; 43:420-421. [PMID: 37060234 DOI: 10.1002/micr.31049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 03/02/2023] [Accepted: 03/29/2023] [Indexed: 04/16/2023]
Affiliation(s)
| | - Hung-Chi Chen
- Department of Plastic Surgery, China Medical University Hospital, Taichung, Taiwan
| | - Shih-Heng Chen
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Chang Gung University and Medical College Taoyuan, Taiwan
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Lu Y, Li Z, Peng X. Regulatory effects of oral microbe on intestinal microbiota and the illness. Front Cell Infect Microbiol 2023; 13:1093967. [PMID: 36816583 PMCID: PMC9928999 DOI: 10.3389/fcimb.2023.1093967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 01/16/2023] [Indexed: 02/04/2023] Open
Abstract
Over the past decade, the association between oral health, intestinal microbiota, and systemic diseases has been further validated. Some oral microbial species have been isolated from pathological intestine mucosa or feces and identified as biomarkers for intestinal diseases. A small proportion of oral microbiome passes through or colonizes the lower gastrointestinal tract, even in healthy individuals. Opportunistic pathogens from the oral cavity may expand and participate in the occurrence and progression of intestinal diseases when the anatomical barrier is disrupted. These disruptors interact with the intestinal microbiota, disturbing indigenous microorganisms, and mucosal barriers through direct colonization, blood circulation, or derived metabolite pathways. While interacting with the host's immune system, oral-derived pathogens stimulate inflammation responses and guide the transition of the intestinal microenvironment from a healthy state to a pre-disease state. Therefore, the oral-gut microbiome axis sheds light on new clinical therapy options, and gastrointestinal tract ecology balance necessitates simultaneous consideration of both oral and gut microbiomes. This review summarizes possible routes of oral microbes entering the intestine and the effects of certain oral bacteria on intestinal microbiota and the host's immune responses.
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6
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Wang B, Zhang B, Zhou L, Li S, Li Z, Luo H. Multi-omics reveals diet-induced metabolic disorders and liver inflammation via microbiota-gut-liver axis. J Nutr Biochem 2023; 111:109183. [PMID: 36270571 DOI: 10.1016/j.jnutbio.2022.109183] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 06/23/2022] [Accepted: 09/23/2022] [Indexed: 11/05/2022]
Abstract
The gut microbiota medicated gut-liver axis is vital for liver function and health. We aimed to explore the underlying molecular mechanism of diet-induced metabolic liver disorders via microbiota-gut-liver axis using multi-omics. Metataxonomics, metaproteomics, transcriptomics, and metabolomics were conducted on liver tissue and biofluids (gastrointestinal contents and blood) to elucidate the microbial mechanism related to metabolic disorders and liver injury. The hepatic inflammation occurred based on histomorphology after feeding a long-term grain-based high-energy diet, and the serum biochemical parameters and proinflammatory cytokines were significantly activated. Metaproteomics analysis indicated that the high-energy diet reduced anti-infection, immunity, anti-oxidant functions, and increased cell death and damage of rumen microbiome. Ruminal Ruminococcus_2, Solobacterium, and Syntrophococcu and jejunal Pirellula were potential microbial markers of liver disorders. The high-energy diet promoted hepatic inflammatory response and cytokine/chemokine-mediated signaling pathways located in the core of the functional genomic network. The high-energy diet increased indoxyl sulfate and p-cresol sulfate and decreased triterpenoids in the liver that were the potential biomarkers associated with metabolic liver disorders. Integrated multi-omics analyses showed interactions among the rumen and jejunum microbiota, circulating metabolites, and liver gene expression, suggesting a systemic immune response and liver disorder that signals through the microbiota-gut-liver axis.
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Affiliation(s)
- Bing Wang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P. R. China.
| | - Boyan Zhang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P. R. China
| | - Lin Zhou
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P. R. China
| | - Shuanghong Li
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P. R. China
| | - Zhen Li
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P. R. China
| | - Hailing Luo
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P. R. China.
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Woo CW, Tso P, Yiu JHC. Commensal gut microbiota-based strategies for oral delivery of therapeutic proteins. Trends Pharmacol Sci 2022; 43:1004-1013. [PMID: 36057462 PMCID: PMC9669164 DOI: 10.1016/j.tips.2022.08.002] [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: 05/16/2022] [Revised: 08/02/2022] [Accepted: 08/03/2022] [Indexed: 01/13/2023]
Abstract
Therapeutic proteins are rarely available in oral dosage form because the hostile environment of the human gastrointestinal (GI) tract and their large size make this delivery method difficult. Commensal bacteria in the gut face the same situation; however, they not only survive but low levels of their structural components such as lipopolysaccharide (LPS), peptidoglycan, and flagellin are also consistently detectable in the circulatory systems of healthy individuals. This opinion article discusses how gut bacteria survive in the gut, how their components penetrate the body from the perspective of the bacteria's and the host's proactivity, and how orally administered therapeutic proteins may be developed that exploit similar mechanisms to enter the body.
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Affiliation(s)
- Connie W Woo
- Department of Pharmacology and Pharmacy, Li Ka Shing (LKS) Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.
| | - Patrick Tso
- Department of Pathology and Laboratory Medicine, College of Medicine, University of Cincinnati, OH, USA
| | - Jensen H C Yiu
- Department of Pharmacology and Pharmacy, Li Ka Shing (LKS) Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
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8
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Oemcke LA, Anderson RC, Altermann E, Roy NC, McNabb WC. The Role of Segmented Filamentous Bacteria in Immune Barrier Maturation of the Small Intestine at Weaning. Front Nutr 2021; 8:759137. [PMID: 34869529 PMCID: PMC8637878 DOI: 10.3389/fnut.2021.759137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Accepted: 10/25/2021] [Indexed: 11/24/2022] Open
Abstract
The microbiological, physical, chemical, and immunological barriers of the gastrointestinal tract (GIT) begin developing in utero and finish maturing postnatally. Maturation of these barriers is essential for the proper functioning of the GIT. Maturation, particularly of the immunological barrier, involves stimulation by bacteria. Segmented filamentous bacteria (SFB) which are anaerobic, spore-forming commensals have been linked to immune activation. The presence and changes in SFB abundance have been positively correlated to immune markers (cytokines and immunoglobulins) in the rat ileum and stool samples, pre- and post-weaning. The abundance of SFB in infant stool increases from 6 months, peaks around 12 months and plateaus 25 months post-weaning. Changes in SFB abundance at these times correlate positively and negatively with the production of interleukin 17 (IL 17) and immunoglobulin A (IgA), respectively, indicating involvement in immune function and maturation. Additionally, the peak in SFB abundance when a human milk diet was complemented by solid foods hints at a diet effect. SFB genome analysis revealed enzymes involved in metabolic pathways for survival, growth and development, host mucosal attachment and substrate acquisition. This narrative review discusses the current knowledge of SFB and their suggested effects on the small intestine immune system. Referencing the published genomes of rat and mouse SFB, the use of food substrates to modulate SFB abundance is proposed while considering their effects on other microbes. Changes in the immune response caused by the interaction of food substrate with SFB may provide insight into their role in infant immunological barrier maturation.
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Affiliation(s)
- Linda A Oemcke
- Riddet Institute, Massey University, Palmerston North, New Zealand.,School of Food and Advanced Technology, Massey University, Palmerston North, New Zealand.,Smart Foods Innovation Centre of Excellence, AgResearch, Palmerston North, New Zealand
| | - Rachel C Anderson
- Riddet Institute, Massey University, Palmerston North, New Zealand.,Smart Foods Innovation Centre of Excellence, AgResearch, Palmerston North, New Zealand
| | - Eric Altermann
- Riddet Institute, Massey University, Palmerston North, New Zealand.,Consumer Interface Innovation Centre of Excellence, AgResearch, Palmerston North, New Zealand.,High-Value Nutrition National Science Challenge, Auckland, New Zealand
| | - Nicole C Roy
- Riddet Institute, Massey University, Palmerston North, New Zealand.,High-Value Nutrition National Science Challenge, Auckland, New Zealand.,Department of Human Nutrition, University of Otago, Dunedin, New Zealand
| | - Warren C McNabb
- Riddet Institute, Massey University, Palmerston North, New Zealand.,High-Value Nutrition National Science Challenge, Auckland, New Zealand
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Williams MR, Stedtfeld RD, Stedtfeld TM, Crawford RB, Kuwahara T, Kaminski NE, Tiedje JM, Hashsham SA. MicroRNA-based host response to toxicant exposure is influenced by the presence of gut microbial populations. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 797:149130. [PMID: 34311349 PMCID: PMC8464502 DOI: 10.1016/j.scitotenv.2021.149130] [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: 05/10/2021] [Revised: 06/27/2021] [Accepted: 07/14/2021] [Indexed: 06/13/2023]
Abstract
Segmented filamentous bacteria (SFB) and Bacteroides fragilis are known to interact with the host immune response through the aryl hydrocarbon receptor (Ahr). 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD), an environmental toxicant and a high-affinity Ahr ligand has the potential to modify the effect of SFB and B. fragilis. MicroRNAs (miRNA) with their role in regulating gene expression post-transcriptionally, may potentially be used to observe such interactions between SFB, B. fragilis, and TCDD. However, little is known regarding the impact of gut microbial members on miRNA expression or its modulation in the presence of an environmental toxicant. This information is important in understanding toxicant-mediated dysbiosis in gut microbiome and the resulting human health impacts. In this study, C57BL/6 germ-free (GF) mice were colonized with SFB and B. fragilis and administered 30 μg/kg TCDD every 4 d for 28 d and miRNA were measured. Compared to GF mice, colonization with SFB resulted in an increase in up- and down-regulated Ileal miRNAs. TCDD treatment of this group decreased the number of upregulated miRNA and increased the number of down-regulated miRNAs. Association with SFB and B. fragilis together had a similar but less pronounced effect in response to TCDD treatment. TCDD treatment of GF mice had no miRNA expression response. Immune and inflammatory responses and T-cell differentiation were the key functions impacted by these miRNAs. Overall, these results reveal that the host response to toxicants may also depend on the presence of specific gut microbial populations.
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Affiliation(s)
- Maggie R Williams
- School of Engineering & Technology, Institute for Great Lakes Research, Central Michigan University, Mt Pleasant, MI, USA
| | | | | | - Robert B Crawford
- Institute for Integrative Toxicology, Michigan State University, East Lansing, MI 48824, USA; Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI 48824, USA
| | - Tomomi Kuwahara
- Department of Microbiology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Norbert E Kaminski
- Institute for Integrative Toxicology, Michigan State University, East Lansing, MI 48824, USA; Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI 48824, USA; Center for Research on Ingredient Safety, Michigan State University, East Lansing, MI 48824, USA
| | - James M Tiedje
- Center for Microbial Ecology, Michigan State University, East Lansing, MI 48824, USA; Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824, USA
| | - Syed A Hashsham
- Center for Microbial Ecology, Michigan State University, East Lansing, MI 48824, USA; Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824, USA; Department of Civil and Environmental Engineering, East Lansing, MI 48824, USA.
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10
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Tu Y, Yang R, Xu X, Zhou X. The microbiota-gut-bone axis and bone health. J Leukoc Biol 2021; 110:525-537. [PMID: 33884666 DOI: 10.1002/jlb.3mr0321-755r] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 03/16/2021] [Accepted: 04/05/2021] [Indexed: 02/05/2023] Open
Abstract
The gastrointestinal tract is colonized by trillions of microorganisms, consisting of bacteria, fungi, and viruses, known as the "second gene pool" of the human body. In recent years, the microbiota-gut-bone axis has attracted increasing attention in the field of skeletal health/disorders. The involvement of gut microbial dysbiosis in multiple bone disorders has been recognized. The gut microbiota regulates skeletal homeostasis through its effects on host metabolism, immune function, and hormonal secretion. Owing to the essential role of the gut microbiota in skeletal homeostasis, novel gut microbiota-targeting therapeutics, such as probiotics and prebiotics, have been proven effective in preventing bone loss. However, more well-controlled clinical trials are still needed to evaluate the long-term efficacy and safety of these ecologic modulators in the treatment of bone disorders.
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Affiliation(s)
- Ye Tu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, P.R. China.,Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, P.R. China
| | - Ran Yang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, P.R. China.,Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, P.R. China
| | - Xin Xu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, P.R. China.,Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, P.R. China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, P.R. China.,Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, P.R. China
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