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Deschamps C, Apper E, Brun M, Durif C, Denis S, Humbert D, Blanquet-Diot S. Development of a new antibiotic-induced dysbiosis model of the canine colonic microbiota. Int J Antimicrob Agents 2024; 63:107102. [PMID: 38325721 DOI: 10.1016/j.ijantimicag.2024.107102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 01/05/2024] [Accepted: 01/29/2024] [Indexed: 02/09/2024]
Abstract
As in humans, antibiotics are widely used in dogs to treat gastrointestinal infections, contributing to the global burden of antimicrobial resistance on both human and animal health. Close contact between pets and their owners can lead to horizontal transfer of gut microbes, including transmission of antibiotic resistance. Nevertheless, until now, the impact of antibiotics on the canine gut microbiota has been poorly described. The aim of this study was to adapt the canine mucosal artificial colon (CANIM-ARCOL) model, reproducing the main nutritional, physicochemical and microbial parameters found in the large intestine of the dog to simulate an antibiotic-induced perturbation. Following initial investigation of five antibiotic cocktails at in-field doses, a 5-day regimen of metronidazole/enrofloxacin (ME) was selected for further model development. Two CANIM-ARCOL bioreactors were inoculated with a faecal sample (n=2 donors) and run in parallel for 26 days under control or antibiotic conditions. ME reduced microbial diversity and induced major shifts in bacterial populations, leading to a state of dysbiosis characterized by an increase in the relative abundance of Streptococcaceae, Lactobacillaceae and Enterobacteriaceae, and a decrease in the relative abundance of Bacteroidaceae, Fusobacteriota and Clostridiaceae. Overall, mucus-associated microbiota were less impacted by antibiotics than luminal microbes. Microbial alterations were associated with drastic decreases in gas production and short-chain fatty acid concentrations. Finally, the model was well validated through in-vitro-in-vivo comparisons in a study in dogs. The CANIM-ARCOL model provides a relevant platform as an alternative to in-vivo assays for an in-depth understanding of antibiotic-microbiota interactions and further testing of restoration strategies at individual level.
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Affiliation(s)
- Charlotte Deschamps
- Université Clermont Auvergne, UMR 454 MEDIS UCA-INRAE, Clermont-Ferrand, France; Lallemand Animal Nutrition, Blagnac Cedex, France
| | | | - Morgane Brun
- Université Clermont Auvergne, UMR 454 MEDIS UCA-INRAE, Clermont-Ferrand, France
| | - Claude Durif
- Université Clermont Auvergne, UMR 454 MEDIS UCA-INRAE, Clermont-Ferrand, France
| | - Sylvain Denis
- Université Clermont Auvergne, UMR 454 MEDIS UCA-INRAE, Clermont-Ferrand, France
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Barmpatsalou V, Tjakra M, Li L, Dubbelboer IR, Karlsson E, Pedersen Lomstein B, Bergström CAS. Development of a canine artificial colonic mucus model for drug diffusion studies. Eur J Pharm Sci 2024; 194:106702. [PMID: 38218203 DOI: 10.1016/j.ejps.2024.106702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 12/14/2023] [Accepted: 01/07/2024] [Indexed: 01/15/2024]
Abstract
Colonic mucus is a key factor in the colonic environment because it may affect drug absorption. Due to the similarity of human and canine gastrointestinal physiology, dogs are an established preclinical species for the assessment of controlled release formulations. Here we report the development of an artificial colonic mucus model to mimic the native canine one. In vitro models of the canine colonic environment can provide insights for early stages of drug development and contribute to the implementation of the 3Rs (refinement, reduction, and replacement) of animal usage in the drug development process. Our artificial colonic mucus could predict diffusion trends observed in native mucus and was successfully implemented in microscopic and macroscopic assays to study macromolecular permeation through the mucus. The traditional Transwell set up was optimized with the addition of a nylon filter to ensure homogenous representation of the mucus barrier in vitro. In conclusion, the canine artificial colonic mucus can be used to study drug permeation across the mucus and its flexibility allows its use in various set ups depending on the nature of the compound under investigation and equipment availability.
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Affiliation(s)
- V Barmpatsalou
- The Swedish Drug Delivery Center, Department of Pharmacy, Uppsala University, Box 580, SE-751 23, Uppsala, Sweden
| | - M Tjakra
- The Swedish Drug Delivery Center, Department of Pharmacy, Uppsala University, Box 580, SE-751 23, Uppsala, Sweden
| | - L Li
- The Swedish Drug Delivery Center, Department of Pharmacy, Uppsala University, Box 580, SE-751 23, Uppsala, Sweden
| | - I R Dubbelboer
- The Swedish Drug Delivery Center, Department of Pharmaceutical Biosciences, Uppsala University, Box 574, SE-751 23, Uppsala, Sweden
| | - E Karlsson
- Oral Product Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Gothenburg, Sweden
| | - B Pedersen Lomstein
- Product Development & Drug Delivery, Global Pharmaceutical R&D, Ferring Pharmaceuticals A/S, Amager Strandvej 405, 2770, Kastrup, Denmark
| | - C A S Bergström
- The Swedish Drug Delivery Center, Department of Pharmacy, Uppsala University, Box 580, SE-751 23, Uppsala, Sweden.
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Deschamps C, Denis S, Humbert D, Priymenko N, Chalancon S, De Bodt J, Van de Wiele T, Ipharraguerre I, Alvarez-Acero I, Achard C, Apper E, Blanquet-Diot S. Canine Mucosal Artificial Colon: development of a new colonic in vitro model adapted to dog sizes. Appl Microbiol Biotechnol 2024; 108:166. [PMID: 38261090 PMCID: PMC10806056 DOI: 10.1007/s00253-023-12987-2] [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: 09/06/2023] [Revised: 12/18/2023] [Accepted: 12/24/2023] [Indexed: 01/24/2024]
Abstract
Differences in dog breed sizes are an important determinant of variations in digestive physiology, mainly related to the large intestine. In vitro gut models are increasingly used as alternatives to animal experiments for technical, cost, societal, and regulatory reasons. Up to now, only one in vitro model of the canine colon incorporates the dynamics of different canine gut regions, yet no adaptations exist to reproduce size-related digestive parameters. To address this limitation, we developed a new model of the canine colon, the CANIne Mucosal ARtificial COLon (CANIM-ARCOL), simulating main physiochemical (pH, transit time, anaerobiosis), nutritional (ileal effluent composition), and microbial (lumen and mucus-associated microbiota) parameters of this ecosystem and adapted to three dog sizes (i.e., small under 10 kg, medium 10-30 kg, and large over 30 kg). To validate the new model regarding microbiota composition and activities, in vitro fermentations were performed in bioreactors inoculated with stools from 13 dogs (4 small, 5 medium, and 4 large). After a stabilization period, microbiota profiles clearly clustered depending on dog size. Bacteroidota and Firmicutes abundances were positively correlated with dog size both in vitro and in vivo, while opposite trends were observed for Actinobacteria and Proteobacteria. As observed in vivo, microbial activity also increased with dog size in vitro, as evidenced from gas production, short-chain fatty acids, ammonia, and bile acid dehydroxylation. In line with the 3R regulation, CANIM-ARCOL could be a relevant platform to assess bilateral interactions between food and pharma compounds and gut microbiota, capturing inter-individual or breed variabilities. KEY POINTS: • CANIM-ARCOL integrates main canine physicochemical and microbial colonic parameters • Gut microbiota associated to different dog sizes is accurately maintained in vitro • The model can help to move toward personalized approach considering dog body weight.
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Affiliation(s)
- Charlotte Deschamps
- UMR 454 MEDIS, Université Clermont Auvergne, INRAE, Clermont-Ferrand, France
- Lallemand Animal Nutrition, Blagnac, France
| | - Sylvain Denis
- UMR 454 MEDIS, Université Clermont Auvergne, INRAE, Clermont-Ferrand, France
| | | | - Nathalie Priymenko
- Toxalim (Research Center in Food Toxicology), University of Toulouse, INRAE, ENVT, INP-Purpan, UPS, 31000, Toulouse, France
| | - Sandrine Chalancon
- UMR 454 MEDIS, Université Clermont Auvergne, INRAE, Clermont-Ferrand, France
| | - Jana De Bodt
- Center for Microbial Ecology and Technology (CMET), Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Tom Van de Wiele
- Center for Microbial Ecology and Technology (CMET), Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | | | - Inma Alvarez-Acero
- Institute of Food Science, Technology and Nutrition, Spanish National Research Council, ICTAN-CSIC), Madrid, Spain
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Elling-Staats ML, Kies AK, Cone JW, Pellikaan WF, Kwakkel RP. An in vitro model for caecal proteolytic fermentation potential of ingredients in broilers. Animal 2023; 17:100768. [PMID: 37011455 DOI: 10.1016/j.animal.2023.100768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 02/27/2023] [Accepted: 02/28/2023] [Indexed: 04/04/2023] Open
Abstract
Fermentation of protein in the caeca of chickens may lead to the production of potentially detrimental metabolites, which can reduce gut health. A poor precaecal digestion is expected to increase protein fermentation (PF), as more proteins are likely to enter the caeca. It is unknown if the undigested protein that enters the caeca differs in fermentability depending on their ingredient source. In order to predict which feed ingredients increase the risk of PF, an in vitro procedure was developed, which simulates the gastric and enteric digestion, subsequent caecal fermentation. After digestion, amino acids and peptides smaller than 3.5 kD in the soluble fraction were removed by means of dialysis. These amino acids and peptides are assumed to be hydrolysed and absorbed in the small intestine of poultry and therefore not used in the fermentation assay. The remaining soluble and fine digesta fractions were inoculated with caecal microbes. In chicken, the soluble and fine fractions enter the caeca, to be fermented, while insoluble and coarse fractions bypass them. The inoculum was made N-free to ensure bacteria would require the N from the digesta fractions for their growth and activity. The gas production (GP) from the inoculum, therefore, reflected the ability of bacteria to use N from substrates and was an indirect measure for PF. The Maximum GP rate of ingredients averaged 21.3 ± 0.9 ml/h (mean ± SEM) and was in some cases more rapid than the positive control (urea, maximum GP rate = 16.5 ml/h). Only small differences in GP kinetics were found between protein ingredients. Branched-chain fatty acids and ammonia concentrations in the fermentation fluid after 24 hours showed no differences between ingredients. Results indicate that solubilised undigested proteins larger than 3.5 kD are rapidly fermented independent of its source when an equal amount of N is present.
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Affiliation(s)
- M L Elling-Staats
- Animal Nutrition Group, Department of Animal Sciences, Wageningen University, PO Box 338, 6700 AH Wageningen, the Netherlands.
| | - A K Kies
- DSM Nutritional Products, Animal Nutrition and Health - EMEA, Kaiseraugst, Switzerland
| | - J W Cone
- Animal Nutrition Group, Department of Animal Sciences, Wageningen University, PO Box 338, 6700 AH Wageningen, the Netherlands
| | - W F Pellikaan
- Animal Nutrition Group, Department of Animal Sciences, Wageningen University, PO Box 338, 6700 AH Wageningen, the Netherlands
| | - R P Kwakkel
- Animal Nutrition Group, Department of Animal Sciences, Wageningen University, PO Box 338, 6700 AH Wageningen, the Netherlands
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Yu H, Li XX, Han X, Chen BX, Zhang XH, Gao S, Xu DQ, Wang Y, Gao ZK, Yu L, Zhu SL, Yao LC, Liu GR, Liu SL, Mu XQ. Fecal microbiota transplantation inhibits colorectal cancer progression: Reversing intestinal microbial dysbiosis to enhance anti-cancer immune responses. Front Microbiol 2023; 14:1126808. [PMID: 37143538 PMCID: PMC10151806 DOI: 10.3389/fmicb.2023.1126808] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 03/27/2023] [Indexed: 05/06/2023] Open
Abstract
Many lines of evidence demonstrate the associations of colorectal cancer (CRC) with intestinal microbial dysbiosis. Recent reports have suggested that maintaining the homeostasis of microbiota and host might be beneficial to CRC patients, but the underlying mechanisms remain unclear. In this study, we established a CRC mouse model of microbial dysbiosis and evaluated the effects of fecal microbiota transplantation (FMT) on CRC progression. Azomethane and dextran sodium sulfate were used to induce CRC and microbial dysbiosis in mice. Intestinal microbes from healthy mice were transferred to CRC mice by enema. The vastly disordered gut microbiota of CRC mice was largely reversed by FMT. Intestinal microbiota from normal mice effectively suppressed cancer progression as assessed by measuring the diameter and number of cancerous foci and significantly prolonged survival of the CRC mice. In the intestine of mice that had received FMT, there were massive infiltration of immune cells, including CD8+ T and CD49b+ NK, which is able to directly kill cancer cells. Moreover, the accumulation of immunosuppressive cells, Foxp3+ Treg cells, seen in the CRC mice was much reduced after FMT. Additionally, FMT regulated the expressions of inflammatory cytokines in CRC mice, including down-regulation of IL1a, IL6, IL12a, IL12b, IL17a, and elevation of IL10. These cytokines were positively correlated with Azospirillum_sp._47_25, Clostridium_sensu_stricto_1, the E. coli complex, Akkermansia, Turicibacter, and negatively correlated with Muribaculum, Anaeroplasma, Candidatus_Arthromitus, and Candidatus Saccharimonas. Furthermore, the repressed expressions of TGFb, STAT3 and elevated expressions of TNFa, IFNg, CXCR4 together promoted the anti-cancer efficacy. Their expressions were positively correlated with Odoribacter, Lachnospiraceae-UCG-006, Desulfovibrio, and negatively correlated with Alloprevotella, Ruminococcaceae UCG-014, Ruminiclostridium, Prevotellaceae UCG-001 and Oscillibacter. Our studies indicate that FMT inhibits the development of CRC by reversing gut microbial disorder, ameliorating excessive intestinal inflammation and cooperating with anti-cancer immune responses.
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Affiliation(s)
- Hao Yu
- Genomics Research Center (Key Laboratory of Gut Microbiota and Pharmacogenomics of Heilongjiang Province), College of Pharmacy, Harbin Medical, University, Harbin, China
- HMU-UCCSM Centre for Infection and Genomics, Harbin Medical University, Harbin, Heilongjiang, China
- Translational Medicine Research and Cooperation Center of Northern China, Heilongjiang Academy of Medical Sciences, Harbin, Heilongjiang, China
| | - Xing-Xiu Li
- Genomics Research Center (Key Laboratory of Gut Microbiota and Pharmacogenomics of Heilongjiang Province), College of Pharmacy, Harbin Medical, University, Harbin, China
| | - Xing Han
- Genomics Research Center (Key Laboratory of Gut Microbiota and Pharmacogenomics of Heilongjiang Province), College of Pharmacy, Harbin Medical, University, Harbin, China
- HMU-UCCSM Centre for Infection and Genomics, Harbin Medical University, Harbin, Heilongjiang, China
- Translational Medicine Research and Cooperation Center of Northern China, Heilongjiang Academy of Medical Sciences, Harbin, Heilongjiang, China
| | - Bin-Xin Chen
- Genomics Research Center (Key Laboratory of Gut Microbiota and Pharmacogenomics of Heilongjiang Province), College of Pharmacy, Harbin Medical, University, Harbin, China
| | - Xing-Hua Zhang
- Genomics Research Center (Key Laboratory of Gut Microbiota and Pharmacogenomics of Heilongjiang Province), College of Pharmacy, Harbin Medical, University, Harbin, China
- HMU-UCCSM Centre for Infection and Genomics, Harbin Medical University, Harbin, Heilongjiang, China
- Translational Medicine Research and Cooperation Center of Northern China, Heilongjiang Academy of Medical Sciences, Harbin, Heilongjiang, China
| | - Shan Gao
- Pathology Department, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Dan-Qi Xu
- Genomics Research Center (Key Laboratory of Gut Microbiota and Pharmacogenomics of Heilongjiang Province), College of Pharmacy, Harbin Medical, University, Harbin, China
- HMU-UCCSM Centre for Infection and Genomics, Harbin Medical University, Harbin, Heilongjiang, China
- Translational Medicine Research and Cooperation Center of Northern China, Heilongjiang Academy of Medical Sciences, Harbin, Heilongjiang, China
| | - Yao Wang
- Genomics Research Center (Key Laboratory of Gut Microbiota and Pharmacogenomics of Heilongjiang Province), College of Pharmacy, Harbin Medical, University, Harbin, China
- HMU-UCCSM Centre for Infection and Genomics, Harbin Medical University, Harbin, Heilongjiang, China
- Translational Medicine Research and Cooperation Center of Northern China, Heilongjiang Academy of Medical Sciences, Harbin, Heilongjiang, China
| | - Zhan-Kui Gao
- Genomics Research Center (Key Laboratory of Gut Microbiota and Pharmacogenomics of Heilongjiang Province), College of Pharmacy, Harbin Medical, University, Harbin, China
- HMU-UCCSM Centre for Infection and Genomics, Harbin Medical University, Harbin, Heilongjiang, China
- Translational Medicine Research and Cooperation Center of Northern China, Heilongjiang Academy of Medical Sciences, Harbin, Heilongjiang, China
| | - Lei Yu
- Department of Colorectal Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Song-Ling Zhu
- Genomics Research Center (Key Laboratory of Gut Microbiota and Pharmacogenomics of Heilongjiang Province), College of Pharmacy, Harbin Medical, University, Harbin, China
- HMU-UCCSM Centre for Infection and Genomics, Harbin Medical University, Harbin, Heilongjiang, China
| | - Li-Chen Yao
- Genomics Research Center (Key Laboratory of Gut Microbiota and Pharmacogenomics of Heilongjiang Province), College of Pharmacy, Harbin Medical, University, Harbin, China
| | - Gui-Rong Liu
- Genomics Research Center (Key Laboratory of Gut Microbiota and Pharmacogenomics of Heilongjiang Province), College of Pharmacy, Harbin Medical, University, Harbin, China
- HMU-UCCSM Centre for Infection and Genomics, Harbin Medical University, Harbin, Heilongjiang, China
- Translational Medicine Research and Cooperation Center of Northern China, Heilongjiang Academy of Medical Sciences, Harbin, Heilongjiang, China
- *Correspondence: Xiao-Qin Mu, ; Shu-Lin Liu, ; Gui-Rong Liu,
| | - Shu-Lin Liu
- Genomics Research Center (Key Laboratory of Gut Microbiota and Pharmacogenomics of Heilongjiang Province), College of Pharmacy, Harbin Medical, University, Harbin, China
- HMU-UCCSM Centre for Infection and Genomics, Harbin Medical University, Harbin, Heilongjiang, China
- Translational Medicine Research and Cooperation Center of Northern China, Heilongjiang Academy of Medical Sciences, Harbin, Heilongjiang, China
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB, Canada
- *Correspondence: Xiao-Qin Mu, ; Shu-Lin Liu, ; Gui-Rong Liu,
| | - Xiao-Qin Mu
- Genomics Research Center (Key Laboratory of Gut Microbiota and Pharmacogenomics of Heilongjiang Province), College of Pharmacy, Harbin Medical, University, Harbin, China
- HMU-UCCSM Centre for Infection and Genomics, Harbin Medical University, Harbin, Heilongjiang, China
- Translational Medicine Research and Cooperation Center of Northern China, Heilongjiang Academy of Medical Sciences, Harbin, Heilongjiang, China
- *Correspondence: Xiao-Qin Mu, ; Shu-Lin Liu, ; Gui-Rong Liu,
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