151
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Sun MC, Zhang FC, Yin X, Cheng BJ, Zhao CH, Wang YL, Zhang ZZ, Hao HW, Zhang TH, Ye HQ. Lactobacillus reuteri F-9-35 Prevents DSS-Induced Colitis by Inhibiting Proinflammatory Gene Expression and Restoring the Gut Microbiota in Mice. J Food Sci 2018; 83:2645-2652. [PMID: 30216448 DOI: 10.1111/1750-3841.14326] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 06/25/2018] [Accepted: 07/21/2018] [Indexed: 12/14/2022]
Abstract
Probiotics are considered to be a potential treatment for ulcerative colitis (UC). The aim of this study was to compare the preventive effect of a space flight-induced mutant L. reuteri F-9-35 and its wild type on UC in vivo. Female mice were randomly assigned to five groups: one normal and four colitic. Mice from colitis groups were daily gavaged with 0.2 mL 12% (w/v) skim milk containing the mutant or wild type (1 × 1011 CFU/mL), skim milk alone or distilled water for the whole experiment period, starting 7 days before colitis induction. UC was induced by administrating mice with 3.5% (w/v) dextran sulfate sodium (DSS) in drinking water for 7 days, after which DSS was removed and maintained for 3 days as a recovery phase. The results showed that the mice fed with L. reuteri F-9-35 had less inflammatory phenotype according to macroscopic and histological analysis, reduced myeloperoxidase activity, and lower expression of proinflammatory genes (Tumor necrosis factor-α, cyclooxygenase-2 and interleukin-6) in colonic tissue compared with control. Furthermore, L. reuteri F-9-35 protected the mice from gut microbiota dysbiosis from DDS induced colitis. Neither wild type nor the milk alone had such beneficial effects. From above we conclude that L. reuteri F-9-35 has great potential in the prevention of UC as a dietary supplement. PRACTICAL APPLICATION Ulcerative colitis (UC) is the most common inflammatory bowel diseases and there is still a lack of safe and effective treatments. Consumption of L. reuteri F-9-35 may effective in preventing human UC.
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Affiliation(s)
- Mao-Cheng Sun
- College of Food Science and Engineering, Jilin Univ., Changchun, China.,School of Public Health, Jilin Medical Univ., Jilin City, China
| | - Fu-Cheng Zhang
- College of Food Science and Engineering, Jilin Univ., Changchun, China
| | - Xue Yin
- College of Food Science and Engineering, Jilin Univ., Changchun, China
| | - Bi-Jun Cheng
- College of Food Science and Engineering, Jilin Univ., Changchun, China
| | - Chang-Hui Zhao
- College of Food Science and Engineering, Jilin Univ., Changchun, China
| | - Yan-Ling Wang
- School of Pharmaceutical Sciences, Jilin Univ., Changchun, China
| | - Zheng-Zhe Zhang
- College of Food Science and Engineering, Jilin Univ., Changchun, China
| | - Hong-Wei Hao
- Fullarton Bioengineering Technology Co., Ltd, Beijing, China
| | - Tie-Hua Zhang
- College of Food Science and Engineering, Jilin Univ., Changchun, China
| | - Hai-Qing Ye
- College of Food Science and Engineering, Jilin Univ., Changchun, China
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152
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Gaifem J, Gonçalves LG, Dinis-Oliveira RJ, Cunha C, Carvalho A, Torrado E, Rodrigues F, Saraiva M, Castro AG, Silvestre R. L-Threonine Supplementation During Colitis Onset Delays Disease Recovery. Front Physiol 2018; 9:1247. [PMID: 30233416 PMCID: PMC6134202 DOI: 10.3389/fphys.2018.01247] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 08/17/2018] [Indexed: 12/19/2022] Open
Abstract
Dietary nutrients have emerged as potential therapeutic adjuncts for inflammatory bowel disease (IBD) given their impact on intestinal homeostasis through the modulation of immune response, gut microbiota composition and epithelial barrier stability. Several nutrients have already been associated with a protective phenotype. Yet, there is a lack of knowledge toward the most promising ones as well as the most adequate phase of action. To unveil the most prominent therapy candidates we characterized the colon metabolic profile during colitis development. We have observed a twofold decrease in threonine levels in mice subjected to DSS-induced colitis. We then assessed the effect of threonine supplementation in the beginning of the inflammatory process (DSS + Thr) or when inflammation is already established (DSS + Thr D8). Colitis progression was similar between the treated groups and control colitic mice, yet threonine had a surprisingly detrimental effect when administered in the beginning of the disease, with mice displaying a delayed recovery when compared to control mice and mice supplemented with threonine after day 8. Although no major changes were found in their metabolic profile, DSS + Thr mice displayed altered expression in mucin-encoding genes, as well as in goblet cell counts, unveiling an impaired ability to produce mucus. Moreover, IL-22 secretion was decreased in DSS + Thr mice when compared to DSS + Thr D8 mice. Overall, these results suggest that supplementation with threonine during colitis induction impact goblet cell number and delays the recovery period. This reinforces the importance of a deeper understanding regarding threonine supplementation in IBD.
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Affiliation(s)
- Joana Gaifem
- Life and Health Sciences Research Institute, School of Health Sciences, University of Minho, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Guimarães, Portugal
| | - Luís G Gonçalves
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade NOVA de Lisboa, Oeiras, Portugal
| | - Ricardo J Dinis-Oliveira
- IINFACTS - Institute of Research and Advanced Training in Health Sciences and Technologies, Department of Sciences, CESPU, CRL, University Institute of Health Sciences, Gandra, Portugal.,UCIBIO, REQUIMTE, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal.,Department of Public Health and Forensic Sciences, and Medical Education, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Cristina Cunha
- Life and Health Sciences Research Institute, School of Health Sciences, University of Minho, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Guimarães, Portugal
| | - Agostinho Carvalho
- Life and Health Sciences Research Institute, School of Health Sciences, University of Minho, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Guimarães, Portugal
| | - Egídio Torrado
- Life and Health Sciences Research Institute, School of Health Sciences, University of Minho, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Guimarães, Portugal
| | - Fernando Rodrigues
- Life and Health Sciences Research Institute, School of Health Sciences, University of Minho, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Guimarães, Portugal
| | - Margarida Saraiva
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
| | - António G Castro
- Life and Health Sciences Research Institute, School of Health Sciences, University of Minho, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Guimarães, Portugal
| | - Ricardo Silvestre
- Life and Health Sciences Research Institute, School of Health Sciences, University of Minho, Braga, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Guimarães, Portugal
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153
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Comparisons of gut microbiota profiles in wild-type and gelatinase B/matrix metalloproteinase-9-deficient mice in acute DSS-induced colitis. NPJ Biofilms Microbiomes 2018; 4:18. [PMID: 30181895 PMCID: PMC6120875 DOI: 10.1038/s41522-018-0059-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 06/14/2018] [Accepted: 06/18/2018] [Indexed: 02/06/2023] Open
Abstract
Gut microbiota help to educate the immune system and a number of involved immune cells were recently characterized. However, specific molecular determinants in these processes are not known, and, reciprocally, little information exists about single host determinants that alter the microbiota. Gelatinase B/matrix metalloproteinase-9 (MMP-9), an innate immune regulator and effector, has been suggested as such a host determinant. In this study, acute colitis was induced in co-housed MMP-9-/- mice (n = 10) and their wild-type (WT) littermates (n = 10) via oral administration of 3% dextran sodium sulfate (DSS) for 7 days followed by 2 days of regular drinking water. Control mice (10 WT and 10 MMP-9-/-) received normal drinking water. Fecal samples were collected at time of sacrifice and immediately frozen at −80 °C. Microbiota analysis was performed using 16S rRNA amplicon sequencing on Illumina MiSeq and taxonomic annotation was performed using the Ribosomal Database Project as reference. Statistical analysis correcting for multiple testing was done using R. No significant differences in clinical or histopathological parameters were found between both genotypes with DSS-induced colitis. Observed microbial richness at genus level and microbiota composition were not significantly influenced by host genotype. In contrast, weight loss, disease activity index, cage, and phenotype did significantly influence the intestinal microbiota composition. After multivariate analysis, cage and phenotype were identified as the sole drivers of microbiota composition variability. In conclusion, changes in fecal microbiota composition were not significantly altered in MMP-9-deficient mice compared to wild-type littermates, but instead were mainly driven by DSS-induced colonic inflammation. A protein that regulates aspects of the immune system has been proposed to influence gut microbial populations implicated in the inflammatory conditions known as colitis, but new evidence suggests the protein has no such effect. Ghislain Opdenakker and colleagues at the Rega Institute for Medical Research in Belgium examined the issue in mice with chemically induced colitis. The gut microbes of normal “wild-type” animals were compared with those in animals lacking the gene for the protein, “gelatinase B/matrix metalloproteinase-9”. The absence of the gene, and therefore of the protein it codes for, caused no significant alteration in the gut microbial population. The presence of colitis, however, did alter the gut microbial population relative to mice with no colitis. The results will assist work to understand the networks of cause and effect linking gut microbes and colitis.
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154
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Bretin A, Lucas C, Larabi A, Dalmasso G, Billard E, Barnich N, Bonnet R, Nguyen HTT. AIEC infection triggers modification of gut microbiota composition in genetically predisposed mice, contributing to intestinal inflammation. Sci Rep 2018; 8:12301. [PMID: 30120269 PMCID: PMC6098085 DOI: 10.1038/s41598-018-30055-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 07/21/2018] [Indexed: 12/12/2022] Open
Abstract
A high prevalence of adherent-invasive E. coli (AIEC) in the intestinal mucosa of Crohn's disease patients has been shown. AIEC colonize the intestine and induce inflammation in genetically predisposed mouse models including CEABAC10 transgenic (Tg) mice expressing human CEACAM6-receptor for AIEC and eif2ak4-/- mice exhibiting autophagy defect in response to AIEC infection. Here, we aimed at investigating whether gut microbiota modification contributes to AIEC-induced intestinal inflammation in these mouse models. For this, eif2ak4+/+ and eif2ak4-/- mice or CEABAC10 Tg mice invalidated for Eif2ak4 gene (Tg/eif2ak4-/-) or not (Tg/eif2ak4+/+) were infected with the AIEC reference strain LF82 or the non-pathogenic E. coli K12 MG1655 strain. In all mouse groups, LF82 colonized the gut better and longer than MG1655. No difference in fecal microbiota composition was observed in eif2ak4+/+ and eif2ak4-/- mice before infection and at day 1 and 4 post-infection. LF82-infected eif2ak4-/- mice exhibited altered fecal microbiota composition at day 14 and 21 post-infection and increased fecal lipocalin-2 level at day 21 post-infection compared to other groups, indicating that intestinal inflammation developed after microbiota modification. Similar results were obtained for LF82-infected Tg/eif2ak4-/- mice. These results suggest that in genetically predisposed hosts, AIEC colonization might induce chronic intestinal inflammation by altering the gut microbiota composition.
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Affiliation(s)
- Alexis Bretin
- M2iSH (Microbes, intestine, inflammation and Susceptibility of the Host), UMR 1071 Inserm, Université Clermont Auvergne, INRA USC 2018, Clermont-Ferrand, 63001, France
| | - Cécily Lucas
- M2iSH (Microbes, intestine, inflammation and Susceptibility of the Host), UMR 1071 Inserm, Université Clermont Auvergne, INRA USC 2018, Clermont-Ferrand, 63001, France
| | - Anaïs Larabi
- M2iSH (Microbes, intestine, inflammation and Susceptibility of the Host), UMR 1071 Inserm, Université Clermont Auvergne, INRA USC 2018, Clermont-Ferrand, 63001, France
| | - Guillaume Dalmasso
- M2iSH (Microbes, intestine, inflammation and Susceptibility of the Host), UMR 1071 Inserm, Université Clermont Auvergne, INRA USC 2018, Clermont-Ferrand, 63001, France
| | - Elisabeth Billard
- M2iSH (Microbes, intestine, inflammation and Susceptibility of the Host), UMR 1071 Inserm, Université Clermont Auvergne, INRA USC 2018, Clermont-Ferrand, 63001, France
| | - Nicolas Barnich
- M2iSH (Microbes, intestine, inflammation and Susceptibility of the Host), UMR 1071 Inserm, Université Clermont Auvergne, INRA USC 2018, Clermont-Ferrand, 63001, France
| | - Richard Bonnet
- M2iSH (Microbes, intestine, inflammation and Susceptibility of the Host), UMR 1071 Inserm, Université Clermont Auvergne, INRA USC 2018, Clermont-Ferrand, 63001, France
- Centre Hospitalier Universitaire (CHU), Clermont-Ferrand, 63001, France
| | - Hang Thi Thu Nguyen
- M2iSH (Microbes, intestine, inflammation and Susceptibility of the Host), UMR 1071 Inserm, Université Clermont Auvergne, INRA USC 2018, Clermont-Ferrand, 63001, France.
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155
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Yamamoto K, Kushida M, Tsuduki T. The effect of dietary lipid on gut microbiota in a senescence-accelerated prone mouse model (SAMP8). Biogerontology 2018; 19:367-383. [DOI: 10.1007/s10522-018-9764-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 07/30/2018] [Indexed: 12/26/2022]
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156
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Martín R, Chain F, Miquel S, Motta JP, Vergnolle N, Sokol H, Langella P. Using murine colitis models to analyze probiotics-host interactions. FEMS Microbiol Rev 2018; 41:S49-S70. [PMID: 28830096 DOI: 10.1093/femsre/fux035] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 06/08/2017] [Indexed: 02/07/2023] Open
Abstract
Probiotics are defined as 'live microorganisms which when administered in adequate amounts confer a health benefit on the host'. So, to consider a microorganism as a probiotic, a demonstrable beneficial effect on the health host should be shown as well as an adequate defined safety status and the capacity to survive transit through the gastrointestinal tract and to storage conditions. In this review, we present an overview of the murine colitis models currently employed to test the beneficial effect of the probiotic strains as well as an overview of the probiotics already tested. Our aim is to highlight both the importance of the adequate selection of the animal model to test the potential probiotic strains and of the value of the knowledge generated by these in vivo tests.
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Affiliation(s)
- Rebeca Martín
- INRA, Commensals and Probiotics-Host Interactions Laboratory, Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Florian Chain
- INRA, Commensals and Probiotics-Host Interactions Laboratory, Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Sylvie Miquel
- Laboratoire Microorganismes: Génome et Environnement (LMGE), UMR CNRS 6023, Université Clermont-Auvergne, 63000 Clermont-Ferrand, France
| | - Jean-Paul Motta
- Department of Biological Science, Inflammation Research Network, University of Calgary, AB T3E 4N1, Canada.,IRSD, Université de Toulouse, INSERM, INRA, ENVT, UPS, F-31300 Toulouse, France
| | - Nathalie Vergnolle
- IRSD, Université de Toulouse, INSERM, INRA, ENVT, UPS, F-31300 Toulouse, France
| | - Harry Sokol
- INRA, Commensals and Probiotics-Host Interactions Laboratory, Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France.,Sorbonne University - Université Pierre et Marie Curie (UPMC), 75252 Paris, France.,Institut National de la Santé et de la Recherche Médicale (INSERM) Equipe de Recherche Labélisée (ERL) 1157, Avenir Team Gut Microbiota and Immunity, 75012 Paris, France.,Department of Gastroenterology, Saint Antoine Hospital, Assistance Publique - Hopitaux de Paris, UPMC, 75012 Paris, France
| | - Philippe Langella
- INRA, Commensals and Probiotics-Host Interactions Laboratory, Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
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157
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Burrello C, Garavaglia F, Cribiù FM, Ercoli G, Bosari S, Caprioli F, Facciotti F. Short-term Oral Antibiotics Treatment Promotes Inflammatory Activation of Colonic Invariant Natural Killer T and Conventional CD4 + T Cells. Front Med (Lausanne) 2018; 5:21. [PMID: 29468162 PMCID: PMC5808298 DOI: 10.3389/fmed.2018.00021] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 01/22/2018] [Indexed: 12/12/2022] Open
Abstract
The gut mucosa is continuously exposed to a vast community of microorganisms, collectively defined as microbiota, establishing a mutualistic relationship with the host and contributing to shape the immune system. Gut microbiota is acquired at birth, and its composition is relatively stable during the entire adult life. Intestinal dysbiosis, defined as a microbial imbalance of gut bacterial communities, can be caused by several factors, including bacterial infections and antibiotic use, and has been associated with an increased risk to develop or exacerbate immune-mediated pathologies, such as allergic reactions, asthma, and inflammatory bowel diseases. Still, the mechanisms by which antibiotic-induced gut dysbiosis may lead to development of mucosal inflammation are still matter of debate. To this end, we aimed to evaluate the impact of antibiotic treatment on phenotype and functions of intestinal immune cell populations, including invariant natural killer T (iNKT) cells, a subset of lipid-specific T cells profoundly influenced by alterations on the commensal microbiota. To this aim, a cocktail of broad-spectrum antibiotics was administered for 2 weeks to otherwise healthy mice before re-colonization of the intestinal microbial community with oral gavage of eubiotic or dysbiotic mucosa-associated bacteria and luminal colonic content, followed or not by intestinal inflammation induction. Here. we showed that short-term antibiotic treatment alters frequency and functions of intestinal iNKT cells, even in the absence of intestinal inflammation. The presence of a dysbiotic microbiota after antibiotic treatment imprints colonic iNKT and CD4+ T cells toward a pro-inflammatory phenotype that collectively contributes to aggravate intestinal inflammation. Nonetheless, the inflammatory potential of the dysbiotic microbiota decreases over time opening the possibility to temporally intervene on the microbial composition to re-equilibrate dysbiosis, thus controlling concomitantly mucosal immune T cell activations.
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Affiliation(s)
- Claudia Burrello
- Department of Oncology and Hemato-Oncology, Università degli Studi di Milano, Milan, Italy.,Department of Experimental Oncology, European Institute of Oncology, Milan, Italy
| | - Federica Garavaglia
- Department of Experimental Oncology, European Institute of Oncology, Milan, Italy
| | - Fulvia Milena Cribiù
- Pathology Unit, Fondazione IRCCS Cà Granda, Ospedale Policlinico di Milano, Milan, Italy
| | - Giulia Ercoli
- Pathology Unit, Fondazione IRCCS Cà Granda, Ospedale Policlinico di Milano, Milan, Italy
| | - Silvano Bosari
- Pathology Unit, Fondazione IRCCS Cà Granda, Ospedale Policlinico di Milano, Milan, Italy
| | - Flavio Caprioli
- Gastroenterology and Endoscopy Unit, Fondazione IRCCS Cà Granda, Ospedale Maggiore Policlinico, Milan, Italy.,Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy
| | - Federica Facciotti
- Department of Experimental Oncology, European Institute of Oncology, Milan, Italy
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158
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Gao XJ, Li T, Wei B, Yan ZX, Hu N, Huang YJ, Han BL, Wai TS, Yang W, Yan R. Bacterial Outer Membrane Vesicles from Dextran Sulfate Sodium-Induced Colitis Differentially Regulate Intestinal UDP-Glucuronosyltransferase 1A1 Partially Through Toll-Like Receptor 4/Mitogen-Activated Protein Kinase/Phosphatidylinositol 3-Kinase Pathway. Drug Metab Dispos 2018; 46:292-302. [PMID: 29311138 DOI: 10.1124/dmd.117.079046] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Accepted: 01/03/2018] [Indexed: 11/22/2022] Open
Abstract
UDP-glucuronosyltransferase 1A1 (UGT1A1) constitutes an important part of intestinal epithelial barrier and catalyzes glucuronidation of many endogenous compounds and drugs. Downregulation of UGT1A1 in inflammation has been reported, whereas the association with gut dysbiosis is poorly defined. This study verified the involvement of gut microbiota in intestinal UGT1A1 regulation using dextran sulfate sodium (DSS)-induced rat colitis model plus fecal microbiota transplantation (FMT). Generally, both DSS induction and colitis-to-normal FMT suppressed mRNA and protein expressions of UGT1A1 and nuclear xenobiotic receptors (NRs) in colon, but enhanced mRNA and decreased protein of rat UGT1A1/rat NRs in small intestine. Normal-to-colitis FMT alleviated DSS-induced changes. Bacterial outer membrane vesicles (OMVs) from colitis rats and rats receiving colitis feces reduced both mRNA and protein of human UGT1A1 (hUGT1A1)/human NRs (hNRs) in Caco-2 cells. Interestingly, using deoxycholate to reduce lipopolysaccharide, normal OMVs upregulated hUGT1A1/hNRs, whereas colitis OMVs decreased, indicating the involvement of other OMVs components in UGT1A1 regulation. The 10- to 50-kDa fractions from both normal and colitis OMVs downregulated hUGT1A1, human PXR, and human PPAR-γ, whereas >50-kDa fractions from normal rats upregulated hUGT1A1 and human CAR. Additionally, the conditioned medium from OMVs-stimulated rat primary macrophages also reduced hUGT1A1/hNRs expression. Both Toll-like receptor (TLR)2 and TLR4 were activated by DSS, colitis-to-normal FMT, and the opposite, whereas only TLR4 was increased in OMVs-treated cells. TLR4 small interfering RNA blocked hUGT1A1/hNRs downregulation and phosphatidylinositol 3-kinase/Akt, extracellular signal-regulated kinase, and nuclear factor κB phosphorylation evoked by bacterial OMVs. Taken together, this study demonstrated that gut microbiota regulate intestinal UGT1A1 partially through secreting OMVs, which interact with intestinal epithelial cells directly or via activating macrophage.
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Affiliation(s)
- Xue-Jiao Gao
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China; and Zhuhai UM Science & Technology Research Institute, Zhuhai, China
| | - Ting Li
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China; and Zhuhai UM Science & Technology Research Institute, Zhuhai, China
| | - Bin Wei
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China; and Zhuhai UM Science & Technology Research Institute, Zhuhai, China
| | - Zhi-Xiang Yan
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China; and Zhuhai UM Science & Technology Research Institute, Zhuhai, China
| | - Nan Hu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China; and Zhuhai UM Science & Technology Research Institute, Zhuhai, China
| | - Yan-Juan Huang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China; and Zhuhai UM Science & Technology Research Institute, Zhuhai, China
| | - Bei-Lei Han
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China; and Zhuhai UM Science & Technology Research Institute, Zhuhai, China
| | - Tai-Seng Wai
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China; and Zhuhai UM Science & Technology Research Institute, Zhuhai, China
| | - Wei Yang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China; and Zhuhai UM Science & Technology Research Institute, Zhuhai, China
| | - Ru Yan
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China; and Zhuhai UM Science & Technology Research Institute, Zhuhai, China
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159
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Gut colonization with extended-spectrum β-lactamase-producing Enterobacteriaceae may increase disease activity in biologic-naive outpatients with ulcerative colitis: an interim analysis. Eur J Gastroenterol Hepatol 2018; 30:92-100. [PMID: 29076938 DOI: 10.1097/meg.0000000000000989] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Certain Enterobacteriaceae strains have been associated with the development of ulcerative colitis (UC). Extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae are the most commonly found multi-drug-resistant (MDR) bacteria colonizing the gut in UC patients and might trigger a more severe disease activity in UC patients. OBJECTIVE The aim of this study was to evaluate whether disease activity is higher in UC patients with gut colonization with ESBL-producing Enterobacteriaceae. MATERIALS AND METHODS A cross-sectional, pilot study was carried out in a tertiary medical center in Latvia. Demographic data were collected; UC disease activity and extent were evaluated according to the full Mayo score, Montreal classification, and adapted Truelove and Witt's index. Rectal swabs with fecal biomaterial were collected, ESBL-producing Enterobacteriaceae were isolated, and bacterial plasmid genes responsible for ESBL production, blaCTX-M, blaTEM, and blaSHV, were detected. UC disease activity was compared in patients with and without gut colonization with ESBL-producing Enterobacteriaceae. RESULTS A total of 65 patients with UC were included in the initial analysis. Gut colonization with ESBL-producing Enterobacteriaceae was found in seven (11%) patients - mostly Escherichia coli [5 (71%)] containing the blaCTX-M bacterial plasmid gene. Patients with gut colonization with ESBL-producing Enterobacteriaceae had more severe disease compared with patients without gut colonization according to the full Mayo score (5.86 vs. 3.40; P=0.015), Montreal classification (moderate disease vs. clinical remission; P=0.031), and adapted Truelove and Witt's index (moderate disease vs. mild disease; P=0.008). CONCLUSION Gut colonization with ESBL-producing Enterobacteriaceae may increase UC disease activity. Further research is needed to analyze the possible confounding factors that could contribute toward this outcome.
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160
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ALJahdali N, Gadonna-Widehem P, Delayre-Orthez C, Marier D, Garnier B, Carbonero F, Anton PM. Repeated Oral Exposure to N ε-Carboxymethyllysine, a Maillard Reaction Product, Alleviates Gut Microbiota Dysbiosis in Colitic Mice. Dig Dis Sci 2017; 62:3370-3384. [PMID: 28965192 DOI: 10.1007/s10620-017-4767-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 09/13/2017] [Indexed: 12/27/2022]
Abstract
BACKGROUND Diet is suggested to participate in the etiology of inflammatory bowel diseases (IBD). Repeated exposure to Maillard reaction products (MRPs), molecules resulting from reduction reactions between amino acids and sugars during food heating, has been reported to be either potentially detrimental or beneficial to health. AIMS The aim of this study is to determine the effect of repeated oral ingestion of N ε-carboxymethyllysine (CML), an advanced MRP, on the onset of two models of experimental IBD and on the gut microbiota composition of mice. METHODS Mice received either saline (control) or N ε-carboxymethyllysine daily for 21 days. For the last week of treatment, each group was split into subgroups, receiving dextran sulfate sodium salt (DSS) or trinitrobenzenesulfonic acid (TNBS) to induce colitis. Intensity of inflammation was quantified, and cecal microbiota characterized by bacterial 16S ribosomal RNA (rRNA) amplicon sequencing. RESULTS Daily oral administration of N ε-carboxymethyllysine did not induce intestinal inflammation and had limited impact on gut microbiota composition (Bacteroidaceae increase, Lachnospiraceae decrease). DSS and TNBS administration resulted in expected moderate experimental colitis with a shift of Bacteroidetes/Firmicutes ratio and a significant Proteobacteria increase but with distinct profiles: different Proteobacteria taxa for DSS, but mainly Enterobacteriaceae for TNBS. While N ε-carboxymethyllysine exposure failed to prevent the inflammatory response, it allowed maintenance of healthy gut microbiota profiles in mice treated with DSS (but not TNBS). CONCLUSIONS Repeated oral exposure to CML limits dysbiosis in experimental colitis. IBD patients may modulate their microbiota profile by regulating the level and type of dietary MRP consumption.
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Affiliation(s)
- Nesreen ALJahdali
- Cell and Molecular Biology Program, University of Arkansas, 2650 Young Avenue, Fayetteville, AR, 72704, USA
| | - Pascale Gadonna-Widehem
- Expression des Gènes et Régulation Epigénétique par l'Aliment UP 2012.10.101., Institut Polytechnique UniLaSalle, 19 rue Pierre Waguet, 60000, Beauvais, France
| | - Carine Delayre-Orthez
- Expression des Gènes et Régulation Epigénétique par l'Aliment UP 2012.10.101., Institut Polytechnique UniLaSalle, 19 rue Pierre Waguet, 60000, Beauvais, France
| | - David Marier
- Expression des Gènes et Régulation Epigénétique par l'Aliment UP 2012.10.101., Institut Polytechnique UniLaSalle, 19 rue Pierre Waguet, 60000, Beauvais, France
| | - Benjamin Garnier
- Expression des Gènes et Régulation Epigénétique par l'Aliment UP 2012.10.101., Institut Polytechnique UniLaSalle, 19 rue Pierre Waguet, 60000, Beauvais, France
| | - Franck Carbonero
- Cell and Molecular Biology Program, University of Arkansas, 2650 Young Avenue, Fayetteville, AR, 72704, USA. .,Department of Food Science and Center for Human Nutrition, University of Arkansas, 2650 Young Avenue, Fayetteville, AR, 72704, USA.
| | - Pauline M Anton
- Expression des Gènes et Régulation Epigénétique par l'Aliment UP 2012.10.101., Institut Polytechnique UniLaSalle, 19 rue Pierre Waguet, 60000, Beauvais, France
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161
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Fu L, Song J, Wang C, Fu S, Wang Y. Bifidobacterium infantis Potentially Alleviates Shrimp Tropomyosin-Induced Allergy by Tolerogenic Dendritic Cell-Dependent Induction of Regulatory T Cells and Alterations in Gut Microbiota. Front Immunol 2017; 8:1536. [PMID: 29176981 PMCID: PMC5686061 DOI: 10.3389/fimmu.2017.01536] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Accepted: 10/27/2017] [Indexed: 12/17/2022] Open
Abstract
Shellfish is one of the major allergen sources worldwide, and tropomyosin (Tm) is the predominant allergic protein in shellfish. Probiotics has been appreciated for its beneficial effects on the host, including anti-allergic and anti-inflammatory effects, although the underlying mechanisms were not fully understood. In this study, oral administration of probiotic strain Bifidobacterium infantis 14.518 (Binf) effectively suppressed Tm-induced allergic response in a mouse model by both preventive and therapeutic strategies. Further results showed that Binf stimulated dendritic cells (DCs) maturation and CD103+ tolerogenic DCs accumulation in gut-associated lymphoid tissue, which subsequently induced regulatory T cells differentiation for suppressing Th2-biased response. We also found that Binf regulates the alterations of gut microbiota composition. Specifically, the increase of Dorea and decrease of Ralstonia is highly correlated with Th2/Treg ratio and may contribute to alleviating Tm-induced allergic responses. Our findings provide molecular insight into the application of Binf in alleviating food allergy and even gut immune homeostasis.
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Affiliation(s)
- Linglin Fu
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China.,Laboratory of Mucosal Immunology and Food Research, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Jinyu Song
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Chong Wang
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China.,Laboratory of Mucosal Immunology and Food Research, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Shujie Fu
- Laboratory of Mucosal Immunology and Food Research, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Yanbo Wang
- Food Safety Key Laboratory of Zhejiang Province, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China.,Laboratory of Mucosal Immunology and Food Research, School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
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162
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Gut dysbiosis breaks immunological tolerance toward the central nervous system during young adulthood. Proc Natl Acad Sci U S A 2017; 114:E9318-E9327. [PMID: 29078267 DOI: 10.1073/pnas.1615715114] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Multiple sclerosis (MS) is an autoimmune disease targeting the central nervous system (CNS) mainly in young adults, and a breakage of immune tolerance to CNS self-antigens has been suggested to initiate CNS autoimmunity. Age and microbial infection are well-known factors involved in the development of autoimmune diseases, including MS. Recent studies have suggested that alterations in the gut microbiota, referred to as dysbiosis, are associated with MS. However, it is still largely unknown how gut dysbiosis affects the onset and progression of CNS autoimmunity. In this study, we investigated the effects of age and gut dysbiosis on the development of CNS autoimmunity in humanized transgenic mice expressing the MS-associated MHC class II (MHC-II) gene, HLA-DR2a, and T-cell receptor (TCR) genes specific for MBP87-99/DR2a that were derived from an MS patient. We show here that the induction of gut dysbiosis triggers the development of spontaneous experimental autoimmune encephalomyelitis (EAE) during adolescence and early young adulthood, while an increase in immunological tolerance with aging suppresses disease onset after late young adulthood in mice. Furthermore, gut dysbiosis induces the expression of complement C3 and production of the anaphylatoxin C3a, and down-regulates the expression of the Foxp3 gene and anergy-related E3 ubiquitin ligase genes. Consequently, gut dysbiosis was able to trigger the development of encephalitogenic T cells and promote the induction of EAE during the age window of young adulthood.
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163
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Hablot J, Peyrin-Biroulet L, Kokten T, El Omar R, Netter P, Bastien C, Jouzeau JY, Sokol H, Moulin D. Experimental colitis delays and reduces the severity of collagen-induced arthritis in mice. PLoS One 2017; 12:e0184624. [PMID: 28926599 PMCID: PMC5604972 DOI: 10.1371/journal.pone.0184624] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 08/28/2017] [Indexed: 12/19/2022] Open
Abstract
Amongst extraintestinal manifestations (EIM) occurring in IBD patients, rheumatologic manifestations are the most frequent. Understanding the relationships between arthritis and colitis is a prerequisite to improving the management of these patients. Microbiota of patients with IBD or rheumatologic diseases, like spondyloarthritis (SpA) is modified compared to healthy individual. Thus, we have evaluated the impact of colitis in the development of arthritis in mice and we have analyzed microbiota changes. Collagen-induced arthritis (CIA) was induced at day 0 in DBA1 mice exposed or not to Dextran Sodium Sulfate (DSS) to induce colitis between day 14 and day 21. Animals were monitored regularly for arthritis and colitis severity (clinical score, hindpaw edema). Fecal microbiota was studied by 16S rRNA deep sequencing at critical time points (D14, D14, D21 & D41). At day 41, histological scoring of the intestines and ankles were performed at the end of experiment. Induction of colitis slightly delayed arthritis onset (2 ± 1 days of delay) and reduced its severity (5.75 ± 1.62 in arthritis only group vs 4.00 ± 1.48 in arthritis + colitis group (p = 0.02 at day 28) macroscopically and histologically. In contrast, colitis severity was not influenced by arthritis development. Induction of colitis promoted a modification of microbiota composition and a decrease of α-diversity. Fecal microbiota composition was different between “colitis” and “arthritis+colitis” groups during colitis development. Interestingly a milder decrease of bacterial diversity in the “arthritis+colitis” group was observed. Concomitant experimental colitis protects mice against collagen-induced arthritis and this is associated with changes in gut microbiome composition.
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MESH Headings
- Animals
- Ankle/pathology
- Arthritis, Experimental/etiology
- Arthritis, Experimental/pathology
- Bacteria/genetics
- Bacteria/isolation & purification
- Colitis/chemically induced
- Colitis/pathology
- Dextran Sulfate/toxicity
- Disease Models, Animal
- Enzyme-Linked Immunosorbent Assay
- Feces/microbiology
- Intestines/microbiology
- Intestines/pathology
- Lipocalin-2/analysis
- Male
- Mice
- Mice, Inbred DBA
- Microbiota
- RNA, Ribosomal, 16S/chemistry
- RNA, Ribosomal, 16S/isolation & purification
- RNA, Ribosomal, 16S/metabolism
- Sequence Analysis, DNA
- Severity of Illness Index
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Affiliation(s)
- Julie Hablot
- IMoPA, UMR7365 CNRS-Université de Lorraine, Vandœuvre Les Nancy, France
| | - Laurent Peyrin-Biroulet
- NGERE, UMR_S954 INSERM-Université de Lorraine, Vandœuvre Les Nancy, France
- Service d'hépato-gastroentérologie, CHRU de Nancy, Vandœuvre Les Nancy, France
| | - Tunay Kokten
- NGERE, UMR_S954 INSERM-Université de Lorraine, Vandœuvre Les Nancy, France
| | - Reine El Omar
- IMoPA, UMR7365 CNRS-Université de Lorraine, Vandœuvre Les Nancy, France
| | - Patrick Netter
- IMoPA, UMR7365 CNRS-Université de Lorraine, Vandœuvre Les Nancy, France
| | - Claire Bastien
- Service d’anatomopathologie, CHRU de Nancy, Vandœuvre Les Nancy, France
| | - Jean-Yves Jouzeau
- IMoPA, UMR7365 CNRS-Université de Lorraine, Vandœuvre Les Nancy, France
| | - Harry Sokol
- Department of Gastroenterology, Saint Antoine Hospital, Paris, France
- Sorbonne University—UPMC Université Paris 06, INSERM ERL 1157, Avenir Team Gut Microbiota and Immunity, UMR 7203 CNRS, Saint-Antoine Hospital, AP-HP, Paris, France
- Micalis Institute, UMR INRA—AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - David Moulin
- IMoPA, UMR7365 CNRS-Université de Lorraine, Vandœuvre Les Nancy, France
- CHRU de Nancy, Contrat d’interface, Vandœuvre Les Nancy, France
- * E-mail:
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164
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Liu Y, Wang X, Hu CAA. Therapeutic Potential of Amino Acids in Inflammatory Bowel Disease. Nutrients 2017; 9:nu9090920. [PMID: 28832517 PMCID: PMC5622680 DOI: 10.3390/nu9090920] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Revised: 08/06/2017] [Accepted: 08/15/2017] [Indexed: 12/19/2022] Open
Abstract
Inflammatory bowel disease (IBD), which includes both ulcerative colitis and Crohn’s disease, is a chronic relapsing inflammation of the gastrointestinal tract, and is difficult to treat. The pathophysiology of IBD is multifactorial and not completely understood, but genetic components, dysregulated immune responses, oxidative stress, and inflammatory mediators are known to be involved. Animal models of IBD can be chemically induced, and are used to study etiology and to evaluate potential treatments of IBD. Currently available IBD treatments can decrease the duration of active disease but because of their adverse effects, the search for novel therapeutic strategies that can restore intestinal homeostasis continues. This review summarizes and discusses what is currently known of the effects of amino acids on the reduction of inflammation, oxidative stress, and cell death in the gut when IBD is present. Recent studies in animal models have identified dietary amino acids that improve IBD, but amino acid supplementation may not be adequate to replace conventional therapy. The animal models used in dietary amino acid research in IBD are described.
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Affiliation(s)
- Yulan Liu
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, China.
| | - Xiuying Wang
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, China.
| | - Chien-An Andy Hu
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, China.
- Department of Biochemistry and Molecular Biology, University of New Mexico School of Medicine, Albuquerque, NM 87131, USA.
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165
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Rabbi MF, Eissa N, Munyaka PM, Kermarrec L, Elgazzar O, Khafipour E, Bernstein CN, Ghia JE. Reactivation of Intestinal Inflammation Is Suppressed by Catestatin in a Murine Model of Colitis via M1 Macrophages and Not the Gut Microbiota. Front Immunol 2017; 8:985. [PMID: 28871257 PMCID: PMC5566981 DOI: 10.3389/fimmu.2017.00985] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Accepted: 08/02/2017] [Indexed: 12/22/2022] Open
Abstract
While there is growing awareness of a relationship between chromogranin-A (CHGA) and susceptibility to inflammatory conditions, the role of human catestatin [(hCTS); CHGA352–67] in the natural history of established inflammatory bowel disease is not known. Recently, using two different experimental models, we demonstrated that hCTS-treated mice develop less severe acute colitis. We have also shown the implication of the macrophages in this effect. The aims of this study were to determine (1) whether hCTS treatment could attenuate the reactivation of inflammation in adult mice with previously established chronic colitis; (2) whether this effect is mediated through macrophages or the gut microbiota. Quiescent colitis was induced in 7–8-week-old C57BL6 mice using four cycles (2–4%) of dextran sulfate sodium. hCTS (1.5 mg/kg/day) treatment or vehicle started 2 days before the last induction of colitis and continuing for 7 days. At sacrifice, macro- and microscopic scores were determined. Colonic pro-inflammatory cytokines [interleukin (IL)-6, IL-1β, and TNF- α], anti-inflammatory cytokines (IL-10, TGF- β), classically activated (M1) (iNOS, Mcp1), and alternatively activated (M2) (Ym1, Arg1) macrophages markers were studied using ELISA and/or RT-qPCR. In vitro, peritoneal macrophages isolated from naïve mice and treated with hCTS (10−5 M, 12 h) were exposed to either lipopolysaccharide (100 ng/ml, 12 h) to polarize M1 macrophages or to IL-4/IL-13 (20 ng/ml) to polarize M2 macrophages. M1/M2 macrophage markers along with cytokine gene expression were determined using RT-qPCR. Feces and mucosa-associated microbiota (MAM) samples were collected, and the V4 region of 16 s rRNA was sequenced. Micro- and macroscopic scores, colonic IL-6, IL-1β, TNF- α, and M1 macrophages markers were significantly decreased in the hCTS-treated group. Treatment did not have any effect on colonic IL-10, TGF-β, and M2 markers nor modified the bacterial richness, diversity, or the major phyla in colitic fecal and MAM samples. In vitro, pro-inflammatory cytokines levels, as well as their gene expression, were significantly reduced in hCTS-treated M1 macrophages. hCTS treatment did not affect M2 macrophage markers. These findings suggest that hCTS treatment attenuates the severity of inflammatory relapse through the modulation of the M1 macrophages and the release of pro-inflammatory cytokines.
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Affiliation(s)
- Mohammad F Rabbi
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada.,The Children Research Hospital Research Institute of Manitoba, University of Manitoba, Winnipeg, MB, Canada
| | - Nour Eissa
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada.,The Children Research Hospital Research Institute of Manitoba, University of Manitoba, Winnipeg, MB, Canada
| | - Peris M Munyaka
- Department of Animal Sciences, University of Manitoba, Winnipeg, MB, Canada
| | | | - Omar Elgazzar
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada
| | - Ehsan Khafipour
- Department of Animal Sciences, University of Manitoba, Winnipeg, MB, Canada.,Department of Medical Microbiology, University of Manitoba, Winnipeg, MB, Canada
| | - Charles N Bernstein
- Department of Internal Medicine, Section of Gastroenterology, University of Manitoba, Winnipeg, MB, Canada.,Inflammatory Bowel Disease Clinical and Research Centre, University of Manitoba, Winnipeg, MB, Canada
| | - Jean Eric Ghia
- Department of Immunology, University of Manitoba, Winnipeg, MB, Canada.,The Children Research Hospital Research Institute of Manitoba, University of Manitoba, Winnipeg, MB, Canada.,Department of Internal Medicine, Section of Gastroenterology, University of Manitoba, Winnipeg, MB, Canada.,Inflammatory Bowel Disease Clinical and Research Centre, University of Manitoba, Winnipeg, MB, Canada
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166
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Effects of concentration of corn distillers dried grains with solubles and enzyme supplementation on cecal microbiota and performance in broiler chickens. Appl Microbiol Biotechnol 2017; 101:7017-7026. [PMID: 28770304 DOI: 10.1007/s00253-017-8448-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 07/17/2017] [Accepted: 07/22/2017] [Indexed: 01/08/2023]
Abstract
With the increasing production of ethanol for biofuels, a by-product of corn-based ethanol fermentation, dried distillers grains with solubles (DDGS) is finding its way into the feed of agricultural animals including cattle, pigs, poultry, sheep, goats, aquaculture species and horses. Corn DDGS contains very high levels of non-starch polysaccharides and could be considered a good source of fibre. Despite knowledge of the role of the fibre in modulating intestinal microbiota and consequently influencing health, there is currently little information on the interactions between DDGS and intestinal microbiota. We assessed the changes in the cecal microbiota of broilers feed rations supplemented with DDGS (five concentrations: 0, 6, 12, 18 and 24% w/w) with and without presence of digestive enzymes. DDGS concentration was strongly positively correlated (P = 3.7e-17, r = 0.74) with feed conversion efficiency (FCR), diminishing broiler performance with higher concentrations. Additionally, DDGS concentrations positively correlated with Richness index (P = 1.5e-3, r = 0.5), increasing the number of detectable species in the cecum. Among the most affected genera, Faecalibacterium (P = 0.032, r = -0.34) and Streptococcus (P = 7.9e-3, r = -0.39) were negatively correlated with DDGS, while Turicibacter (P = 2.8e-4, r = 0.52) was positively correlated with the DDGS concentration. Enzymes showed minimal effect on cecal microbiota.
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167
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Dietary and lifestyle disease indices and caecal microbiota in high fat diet, dietary fibre free diet, or DSS induced IBD models in ICR mice. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.06.030] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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168
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Bian X, Chi L, Gao B, Tu P, Ru H, Lu K. Gut Microbiome Response to Sucralose and Its Potential Role in Inducing Liver Inflammation in Mice. Front Physiol 2017; 8:487. [PMID: 28790923 PMCID: PMC5522834 DOI: 10.3389/fphys.2017.00487] [Citation(s) in RCA: 143] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Accepted: 06/26/2017] [Indexed: 12/20/2022] Open
Abstract
Sucralose is the most widely used artificial sweetener, and its health effects have been highly debated over the years. In particular, previous studies have shown that sucralose consumption can alter the gut microbiota. The gut microbiome plays a key role in processes related to host health, such as food digestion and fermentation, immune cell development, and enteric nervous system regulation. Inflammation is one of the most common effects associated with gut microbiome dysbiosis, which has been linked to a series of human diseases, such as diabetes and obesity. The aim of this study was to investigate the structural and functional effects of sucralose on the gut microbiota and associated inflammation in the host. In this study, C57BL/6 male mice received sucralose in their drinking water for 6 months. The difference in gut microbiota composition and metabolites between control and sucralose-treated mice was determined using 16S rRNA gene sequencing, functional gene enrichment analysis and metabolomics. Inflammatory gene expression in tissues was analyzed by RT-PCR. Alterations in bacterial genera showed that sucralose affects the gut microbiota and its developmental dynamics. Enrichment of bacterial pro-inflammatory genes and disruption in fecal metabolites suggest that 6-month sucralose consumption at the human acceptable daily intake (ADI) may increase the risk of developing tissue inflammation by disrupting the gut microbiota, which is supported by elevated pro-inflammatory gene expression in the liver of sucralose-treated mice. Our results highlight the role of sucralose-gut microbiome interaction in regulating host health-related processes, particularly chronic inflammation.
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Affiliation(s)
- Xiaoming Bian
- Department of Environmental Health Science, University of GeorgiaAthens, GA, United States
| | - Liang Chi
- Department of Environmental Sciences and Engineering, University of North Carolina at Chapel HillChapel Hill, NC, United States
| | - Bei Gao
- Department of Environmental Health Science, University of GeorgiaAthens, GA, United States
| | - Pengcheng Tu
- Department of Environmental Sciences and Engineering, University of North Carolina at Chapel HillChapel Hill, NC, United States
| | - Hongyu Ru
- Department of Population Health and Pathobiology, North Carolina State UniversityRaleigh, NC, United States
| | - Kun Lu
- Department of Environmental Sciences and Engineering, University of North Carolina at Chapel HillChapel Hill, NC, United States
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169
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Robinson LS, Lewis WG, Lewis AL. The sialate O-acetylesterase EstA from gut Bacteroidetes species enables sialidase-mediated cross-species foraging of 9- O-acetylated sialoglycans. J Biol Chem 2017; 292:11861-11872. [PMID: 28526748 PMCID: PMC5512079 DOI: 10.1074/jbc.m116.769232] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 05/18/2017] [Indexed: 12/16/2022] Open
Abstract
The gut harbors many symbiotic, commensal, and pathogenic microbes that break down and metabolize host carbohydrates. Sialic acids are prominent outermost carbohydrates on host glycoproteins called mucins and protect underlying glycan chains from enzymatic degradation. Sialidases produced by some members of the colonic microbiota can promote the expansion of several potential pathogens (e.g. Clostridium difficile, Salmonella, and Escherichia coli) that do not produce sialidases. O-Acetyl ester modifications of sialic acids help resist the action of many sialidases and are present at high levels in the mammalian colon. However, some gut bacteria, in turn, produce sialylate-O-acetylesterases to remove them. Here, we investigated O-acetyl ester removal and sialic acid degradation by Bacteroidetes sialate-O-acetylesterases and sialidases, respectively, and subsequent utilization of host sialic acids by both commensal and pathogenic E. coli strains. In vitro foraging studies demonstrated that sialidase-dependent E. coli growth on mucin is enabled by Bacteroides EstA, a sialate O-acetylesterase acting on glycosidically linked sialylate-O-acetylesterase substrates, particularly at neutral pH. Biochemical studies suggested that spontaneous migration of O-acetyl esters on the sialic acid side chain, which can occur at colonic pH, may serve as a switch controlling EstA-assisted sialic acid liberation. Specifically, EstA did not act on O-acetyl esters in their initial 7-position. However, following migration to the 9-position, glycans with O-acetyl esters became susceptible to the sequential actions of bacterial esterases and sialidases. We conclude that EstA specifically unlocks the nutritive potential of 9-O-acetylated mucus sialic acids for foraging by bacteria that otherwise are prevented from accessing this carbon source.
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Affiliation(s)
- Lloyd S Robinson
- Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, Missouri 63110
| | - Warren G Lewis
- Department of Medicine, Center for Women's Infectious Disease Research, Washington University School of Medicine, St. Louis, Missouri 63110.
| | - Amanda L Lewis
- Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, Missouri 63110.
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170
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Effects of subchronic oral toxic metal exposure on the intestinal microbiota of mice. Sci Bull (Beijing) 2017; 62:831-840. [PMID: 36659316 DOI: 10.1016/j.scib.2017.01.031] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Revised: 01/14/2017] [Accepted: 01/18/2017] [Indexed: 01/21/2023]
Abstract
Oral exposure to toxic metals such as cadmium (Cd), lead (Pb), copper (Cu) and aluminum (Al) can induce various adverse health effects in humans and animals. However, the effects of these metals on the gut microbiota have received limited attention. The present study demonstrated that long-term toxic metal exposure altered the intestinal microbiota of mice in a metal-specific and time-dependent manner. Subchronic oral Cu exposure for eight weeks caused a profound decline in gut microbial diversity in mice, whereas no significant changes were observed in groups treated with other metals. Cd exposure significantly increased the relative abundances of organisms from the genera Alistipes and Odoribacter and caused marked decreases in Mollicutes and unclassified Ruminococcaceae. Pb exposure significantly decreased the abundances of eight genera: unclassified and uncultured Ruminococcaceae, unclassified Lachnospiraceae, Ruminiclostridium_9, Rikenellaceae_RC9_gut_group, Oscillibacter, Anaerotruncus and Lachnoclostridium. Cu exposure affected abundances of the genera Alistipes, Bacteroides, Ruminococcaceae_UCG-014, Allobaculum, Mollicutes_RF9_norank, Rikenellaceae_RC9_gut_group, Ruminococcaceae_unclassified and Turicibacter. Al exposure increased the abundance of Odoribacter and decreased that of Anaerotruncus. Exposure to any metal for eight weeks significantly decreased the abundance of Akkermansia. These results provide a new understanding regarding the role of toxic metals in the pathogenesis of intestinal and systemic disorders in the host within the gut microbiota framework.
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171
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Fan P, Liu P, Song P, Chen X, Ma X. Moderate dietary protein restriction alters the composition of gut microbiota and improves ileal barrier function in adult pig model. Sci Rep 2017; 7:43412. [PMID: 28252026 PMCID: PMC5333114 DOI: 10.1038/srep43412] [Citation(s) in RCA: 212] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 01/23/2017] [Indexed: 12/22/2022] Open
Abstract
This study was conducted to investigate impacts of dietary protein levels on gut bacterial community and gut barrier. The intestinal microbiota of finishing pigs, fed with 16%, 13% and 10% crude protein (CP) in diets, respectively, were investigated using Illumina MiSeq sequencing. The ileal bacterial richness tended to decrease when the dietary protein concentration reduced from 16% to 10%. The proportion of Clostridium_sensu_stricto_1 in ileum significantly decreased, whereas Escherichia-Shigella increased with reduction of protein concentration. In colon, the proportion of Clostridium_sensu_stricto_1 and Turicibacter increased, while the proportion of RC9_gut_group significantly decreased with the dietary protein reduction. Notably, the proportion of Peptostreptococcaceae was higher in both ileum and colon of 13% CP group. As for metabolites, the intestinal concentrations of SCFAs and biogenic amines decreased with the dietary protein reduction. The 10% CP dietary treatment damaged ileal mucosal morphology, and decreased the expression of biomarks of intestinal cells (Lgr5 and Bmi1), whereas the expression of tight junction proteins (occludin and claudin) in 13% CP group were higher than the other two groups. In conclusion, moderate dietary protein restriction (13% CP) could alter the bacterial community and metabolites, promote colonization of beneficial bacteria in both ileum and colon, and improve gut barrier function.
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Affiliation(s)
- Peixin Fan
- State Key Laboratory of Animal Nutrition, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China
| | - Ping Liu
- State Key Laboratory of Animal Nutrition, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China
| | - Peixia Song
- State Key Laboratory of Animal Nutrition, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China
| | - Xiyue Chen
- State Key Laboratory of Animal Nutrition, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China
| | - Xi Ma
- State Key Laboratory of Animal Nutrition, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China
- Department of Internal Medicine, Department of Biochemistry, Center for Autophagy Research, University of Texas Southwestern Medical Center, Dallas, TX 75390-9113, USA
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172
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Seo S, Shin JS, Lee WS, Rhee YK, Cho CW, Hong HD, Lee KT. Anti-colitis effect of Lactobacillus sakei K040706 via suppression of inflammatory responses in the dextran sulfate sodium-induced colitis mice model. J Funct Foods 2017. [DOI: 10.1016/j.jff.2016.12.045] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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173
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Rabbi MF, Munyaka PM, Eissa N, Metz-Boutigue MH, Khafipour E, Ghia JE. Human Catestatin Alters Gut Microbiota Composition in Mice. Front Microbiol 2017; 7:2151. [PMID: 28144234 PMCID: PMC5239785 DOI: 10.3389/fmicb.2016.02151] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 12/20/2016] [Indexed: 12/19/2022] Open
Abstract
The mammalian intestinal tract is heavily colonized with a dense, complex, and diversified microbial populations. In healthy individuals, an array of epithelial antimicrobial agents is secreted in the gut to aid intestinal homeostasis. Enterochromaffin cells (EC) in the intestinal epithelium are a major source of chromogranin A (CgA), which is a pro-hormone and can be cleaved into many bioactive peptides that include catestatin (CST). This study was carried out to evaluate the possible impact of CST on gut microbiota in vivo using a mouse model. The CST (Human CgA352−372) or normal saline was intrarectally administered in C57BL/6 male mice for 6 days and then sacrificed. Feces and colonic mucosa tissue samples were collected, DNA was extracted, the V4 region of bacterial 16S rRNA gene was amplified and subjected to MiSeq Illumina sequencing. The α-diversity was calculated using Chao 1 and β-diversity was determined using QIIME. Differences at the genus level were determined using partial least square discriminant analysis (PLS-DA). Phylogenetic investigation of communities by reconstruction of unobserved states (PICRUSt) was used to predict functional capacity of bacterial community. CST treatment did not modify bacterial richness in fecal and colonic mucosa-associated microbiota; however, treatment significantly modified bacterial community composition between the groups. Also, CST-treated mice had a significantly lower relative abundance of Firmicutes and higher abundance of Bacteroidetes, observed only in fecal samples. However, at lower phylogenetic levels, PLS-DA analysis revealed that some bacterial taxa were significantly associated with the CST-treated mice in both fecal and colonic mucosa samples. In addition, differences in predicted microbial functional pathways in both fecal and colonic mucosa samples were detected. The results support the hypothesis that CST treatment modulates gut microbiota composition under non-pathophysiological conditions, however, the result of this study needs to be further validated in a larger experiment. The data may open new avenues for the development of a potential new line of antimicrobial peptides and their use as therapeutic agents to treat several inflammatory conditions of the gastrointestinal tract, such as inflammatory bowel disease (IBD), inflammatory bowel syndrome (IBS), or other health conditions.
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Affiliation(s)
- Mohammad F Rabbi
- Department of Immunology, University of Manitoba Winnipeg, MB, Canada
| | - Peris M Munyaka
- Department of Immunology, University of ManitobaWinnipeg, MB, Canada; Department of Animal Sciences, University of ManitobaWinnipeg, MB, Canada
| | - Nour Eissa
- Department of Immunology, University of Manitoba Winnipeg, MB, Canada
| | - Marie-Hélène Metz-Boutigue
- Biomaterials and Tissue Engineering, Institut National de la Santé et de la Recherche Médicale Strasbourg, France
| | - Ehsan Khafipour
- Department of Animal Sciences, University of ManitobaWinnipeg, MB, Canada; Department of Medical Microbiology, University of ManitobaWinnipeg, MB, Canada; The Children's Hospital Research Institute of ManitobaWinnipeg, MB, Canada
| | - Jean Eric Ghia
- Department of Immunology, University of ManitobaWinnipeg, MB, Canada; The Children's Hospital Research Institute of ManitobaWinnipeg, MB, Canada; Section of Gastroenterology, Department of Internal Medicine, University of ManitobaWinnipeg, MB, Canada; Inflammatory Bowel Disease Clinical and Research Centre, University of ManitobaWinnipeg, MB, Canada
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174
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Effects of polysaccharide from mycelia of Ganoderma lucidum on intestinal barrier functions of rats. Int J Biol Macromol 2017; 94:1-9. [DOI: 10.1016/j.ijbiomac.2016.09.099] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Revised: 09/27/2016] [Accepted: 09/29/2016] [Indexed: 12/30/2022]
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175
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Eissa N, Hussein H, Wang H, Rabbi MF, Bernstein CN, Ghia JE. Stability of Reference Genes for Messenger RNA Quantification by Real-Time PCR in Mouse Dextran Sodium Sulfate Experimental Colitis. PLoS One 2016; 11:e0156289. [PMID: 27244258 PMCID: PMC4886971 DOI: 10.1371/journal.pone.0156289] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 05/11/2016] [Indexed: 02/07/2023] Open
Abstract
Background Many animal models have been developed to characterize the complexity of colonic inflammation. In dextran sodium sulfate (DSS) experimental colitis in mice the choice of reference genes is critical for accurate quantification of target genes using quantitative real time PCR (RT-qPCR). No studies have addressed the performance of reference genes in mice DSS-experimental colitis. This study aimed to determine the stability of reference genes expression (RGE) in DSS-experimental murine colitis. Methods Colitis was induced in male C57BL/6 mice using DSS5% for 5 days, control group received water. RNA was extracted from inflamed and non-inflamed colon. Using RT-qPCR, comparative analysis of 13 RGE was performed according to predefined criteria and relative colonic TNF-α and IL-1β gene expression was determined by calculating the difference in the threshold cycle. Results Colitis significantly altered the stability of mucosal RGE. Commonly used glyceraldehyde-3-phosphate dehydrogenase (Gapdh), β-actin (Actb), or β2-microglobulin (β2m) showed the highest variability within the inflamed and control groups. Conversely, TATA-box-binding protein (Tbp) and eukaryotic translation elongation factor 2 (Eef2) were not affected by inflammation and were the most stable genes. Normalization of colonic TNF-α and IL-1β mRNA levels was dependent on the reference gene used. Depending on the genes used to normalize the data, statistical significance varied from significant when TBP / Eef2 were used to non-significant when Gapdh, Actb or β2m were used. Conclusions This study highlights the appropriate choice of RGE to ensure adequate normalization of RT-qPCR data when using this model. Suboptimal RGE may explain controversial results from published studies. We recommend using Tbp and Eef2 instead of Gapdh, Actb or β2m as reference genes.
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Affiliation(s)
- Nour Eissa
- Immunology, University of Manitoba, Winnipeg, MB, Canada
- Children's Hospital Research Institute of Manitoba, University of Manitoba, Winnipeg, MB, Canada
| | - Hayam Hussein
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Ohio State University, Columbus, Ohio, United States of America
| | - Hongxing Wang
- Immunology, University of Manitoba, Winnipeg, MB, Canada
- Xuanwu Hospital, Capital Medical University, Beijing, China
| | | | - Charles N. Bernstein
- Internal Medicine section of Gastroenterology, University of Manitoba, Winnipeg, MB, Canada
- IBD Clinical and Research Centre, University of Manitoba, Winnipeg, MB, Canada
| | - Jean-Eric Ghia
- Immunology, University of Manitoba, Winnipeg, MB, Canada
- Children's Hospital Research Institute of Manitoba, University of Manitoba, Winnipeg, MB, Canada
- Internal Medicine section of Gastroenterology, University of Manitoba, Winnipeg, MB, Canada
- IBD Clinical and Research Centre, University of Manitoba, Winnipeg, MB, Canada
- * E-mail:
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