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Hong Y, Dong H, Zhou J, Luo Y, Yuan MM, Zhan JF, Liu YL, Xia JY, Zhang L. Aged gut microbiota contribute to different changes in antioxidant defense in the heart and liver after transfer to germ-free mice. PLoS One 2023; 18:e0289892. [PMID: 37566569 PMCID: PMC10420372 DOI: 10.1371/journal.pone.0289892] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Accepted: 07/28/2023] [Indexed: 08/13/2023] Open
Abstract
Age-associated impairment in antioxidant defense is an important cause of oxidative stress, and elderly individuals are usually associated with gut microbiota (GM) changes. Studies have suggested a potential relationship between the GM and changes in antioxidant defense in aging animals. Direct evidence regarding the impact of aging-associated shifts in GM on the antioxidant defense is lacking. The heart is a kind of postmitotic tissue, which is more prone to oxidative stress than the liver (mitotic tissue). To test and compare the influence of an aged GM on antioxidant defense changes in the heart and liver of the host, in this study, GM from young adolescent (5 weeks) or aged (20 months) mice was transferred to young adolescent (5 weeks) germ-free (GF) mice (N = 5 per group) by fecal microbiota transplantation (FMT). Four weeks after the first FMT was performed, fecal samples were collected for 16S rRNA sequencing. Blood, heart and liver samples were harvested for oxidative stress marker and antioxidant defense analysis. The results showed that mice that received young or aged microbiota showed clear differences in GM composition and diversity. Mice that received aged microbiota had a lower ratio of Bacteroidetes/Firmicutes in GM at the phylum level and an increased relative abundance of four GM genera: Akkermansia, Dubosiella, Alistipes and Rikenellaceae_RC9_gut_group. In addition, GM α-diversity scores based on the Shannon index and Simpson index were significantly higher in aged GM-treated mice. Oxidative stress marker and antioxidant defense tests showed that FMT from aged donors did not have a significant influence on malondialdehyde content in serum, heart and liver. However, the capacity of anti-hydroxyl radicals in the heart and liver, as well as the capacity of anti-superoxide anions in the liver, were significantly increased in mice with aged microbiota. FMT from aged donors increased the activities of Cu/Zn superoxide SOD (Cu/Zn-SOD), catalase (CAT) and glutathione-S-transferase in the heart, as well as the activity of Cu/Zn-SOD in the liver. Positive correlations were found between Cu/Zn-SOD activity and radical scavenging capacities. On the other hand, glutathione reductase activity and glutathione content in the liver were decreased in mice that received aged GM. These findings suggest that aged GM transplantation from hosts is sufficient to influence the antioxidant defense system of young adolescent recipients in an organ-dependent manner, which highlights the importance of the GM in the aging process of the host.
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Affiliation(s)
- Yang Hong
- Animal Experiment Center of Sichuan Academy of Traditional Chinese Medicine Sciences, Chengdu, China
| | - Han Dong
- Animal Experiment Center of Sichuan Academy of Traditional Chinese Medicine Sciences, Chengdu, China
| | - Jing Zhou
- Animal Experiment Center of Sichuan Academy of Traditional Chinese Medicine Sciences, Chengdu, China
| | - Ya Luo
- Animal Experiment Center of Sichuan Academy of Traditional Chinese Medicine Sciences, Chengdu, China
| | - Ming-Ming Yuan
- Animal Experiment Center of Sichuan Academy of Traditional Chinese Medicine Sciences, Chengdu, China
| | - Jia-Fei Zhan
- Animal Experiment Center of Sichuan Academy of Traditional Chinese Medicine Sciences, Chengdu, China
| | - Yang-Lu Liu
- Animal Experiment Center of Sichuan Academy of Traditional Chinese Medicine Sciences, Chengdu, China
| | - Jie-Ying Xia
- Animal Experiment Center of Sichuan Academy of Traditional Chinese Medicine Sciences, Chengdu, China
| | - Lei Zhang
- Animal Experiment Center of Sichuan Academy of Traditional Chinese Medicine Sciences, Chengdu, China
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Lange ME, Clarke ST, Boras VF, Brown CLJ, Zhang G, Laing CR, Uwiera RRE, Montina T, Kalmokoff ML, Taboada EN, Gannon VPJ, Metz GAS, Church JS, Inglis GD. Commensal Escherichia coli Strains of Bovine Origin Competitively Mitigated Escherichia coli O157:H7 in a Gnotobiotic Murine Intestinal Colonization Model with or without Physiological Stress. Animals (Basel) 2023; 13:2577. [PMID: 37627368 PMCID: PMC10451813 DOI: 10.3390/ani13162577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 08/04/2023] [Accepted: 08/07/2023] [Indexed: 08/27/2023] Open
Abstract
Cattle are a primary reservoir of enterohemorrhagic Escherichia coli (EHEC) O157:H7. Currently, there are no effective methods of eliminating this important zoonotic pathogen from cattle, and colonization resistance in relation to EHEC O157:H7 in cattle is poorly understood. We developed a gnotobiotic EHEC O157:H7 murine model to examine aspects of the cattle pathogen-microbiota interaction, and to investigate competitive suppression of EHEC O157:H7 by 18 phylogenetically distinct commensal E. coli strains of bovine origin. As stress has been suggested to influence enteric colonization by EHEC O157:H7 in cattle, corticosterone administration (±) to incite a physiological stress response was included as an experimental variable. Colonization of the intestinal tract (IT) of mice by the bovine EHEC O157:H7 strain, FRIK-2001, mimicked characteristics of bovine IT colonization. In this regard, FRIK-2001 successfully colonized the IT and temporally incited minimal impacts on the host relative to other EHEC O157:H7 strains, including on the renal metabolome. The presence of the commensal E. coli strains decreased EHEC O157:H7 densities in the cecum, proximal colon, and distal colon. Moreover, histopathologic changes and inflammation markers were reduced in the distal colon of mice inoculated with commensal E. coli strains (both propagated separately and communally). Although stress induction affected the behavior of mice, it did not influence EHEC O157:H7 densities or disease. These findings support the use of a gnotobiotic murine model of enteric bovine EHEC O157:H7 colonization to better understand pathogen-host-microbiota interactions toward the development of effective on-farm mitigations for EHEC O157:H7 in cattle, including the identification of bacteria capable of competitively colonizing the IT.
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Affiliation(s)
- Maximo E. Lange
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB T1J 4B1, Canada; (M.E.L.); (S.T.C.); (C.L.J.B.)
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2R3, Canada;
| | - Sandra T. Clarke
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB T1J 4B1, Canada; (M.E.L.); (S.T.C.); (C.L.J.B.)
| | - Valerie F. Boras
- Chinook Regional Hospital, Alberta Health Services, Lethbridge, AB T1J 1W5, Canada;
| | - Catherine L. J. Brown
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB T1J 4B1, Canada; (M.E.L.); (S.T.C.); (C.L.J.B.)
| | - Guangzhi Zhang
- National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB R3E 3R2, Canada; (G.Z.); (E.N.T.)
| | - Chad R. Laing
- National Centre for Animal Diseases, Canadian Food Inspection Agency, Lethbridge, AB T1J 3Z4, Canada;
| | - Richard R. E. Uwiera
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2R3, Canada;
| | - Tony Montina
- Department of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada;
| | - Martin L. Kalmokoff
- Kentville Research and Development Centre, Agriculture and Agri-Food Canada, Kentville, NS B4N 1J5, Canada;
| | - Eduardo N. Taboada
- National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB R3E 3R2, Canada; (G.Z.); (E.N.T.)
| | - Victor P. J. Gannon
- National Microbiology Laboratory, Public Health Agency of Canada, Lethbridge, AB T1J 3Z4, Canada;
| | - Gerlinde A. S. Metz
- Canadian Centre for Behavioural Neuroscience, Department of Neuroscience, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada;
| | - John S. Church
- Natural Resource Science, Thompson Rivers University, Kamloops, BC V2C 0C8, Canada;
| | - G. Douglas Inglis
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB T1J 4B1, Canada; (M.E.L.); (S.T.C.); (C.L.J.B.)
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3
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Lynn MA, Ryan FJ, Tee YC, Lynn DJ. Protocol to colonize gnotobiotic mice in early life and assess the impact on early life immune programming. STAR Protoc 2022; 3:101914. [PMID: 36595955 PMCID: PMC9763935 DOI: 10.1016/j.xpro.2022.101914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 10/14/2022] [Accepted: 11/16/2022] [Indexed: 12/14/2022] Open
Abstract
Understanding how changes in gut microbiota in early life impact immune programming can be difficult to study due to variations in the assembly of the microbiota. In this protocol, we describe how to colonize gnotobiotic/germ-free mice in early life with different microbiota community types (e.g., PAMI and PAMII). We detail several assays to determine whether differential colonization alters immune programming in early life. We also describe how to propagate mouse fecal microbiota transplant material if the donor fecal sample is limited. For complete details on the use and execution of this protocol, please refer to Lynn et al. (2021).1.
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Affiliation(s)
- Miriam A. Lynn
- Precision Medicine Theme, South Australian Health and Medical Research Institute, Adelaide, SA 5001, Australia,Flinders Health and Medical Research Institute, Flinders University, Bedford Park, SA 5042, Australia,Corresponding author
| | - Feargal J. Ryan
- Precision Medicine Theme, South Australian Health and Medical Research Institute, Adelaide, SA 5001, Australia,Flinders Health and Medical Research Institute, Flinders University, Bedford Park, SA 5042, Australia
| | - Yee Chern Tee
- Precision Medicine Theme, South Australian Health and Medical Research Institute, Adelaide, SA 5001, Australia,Flinders Health and Medical Research Institute, Flinders University, Bedford Park, SA 5042, Australia
| | - David J. Lynn
- Precision Medicine Theme, South Australian Health and Medical Research Institute, Adelaide, SA 5001, Australia,Flinders Health and Medical Research Institute, Flinders University, Bedford Park, SA 5042, Australia,Corresponding author
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Guo J, Xu Y, Chen LJ, Zhang SX, Liou YL, Chen XP, Tan ZR, Zhou HH, Zhang W, Chen Y. Gut microbiota and host Cyp450s co-contribute to pharmacokinetic variability in mice with non-alcoholic steatohepatitis: Effects vary from drug to drug. J Adv Res 2022; 39:319-332. [PMID: 35777915 PMCID: PMC9263650 DOI: 10.1016/j.jare.2021.10.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Revised: 10/09/2021] [Accepted: 10/14/2021] [Indexed: 02/07/2023] Open
Abstract
Drugs’ pharmacokinetics were changed in NASH disease. A systematical research on cocktail drugs in NASH. Gut microbiota can bio-transform some drugs in vitro, and the metabolic rate was different in NASH. The gut microbiota and the host co-contributed the pharmacokinetic variability of drugs in NASH. The degree of influence on pharmacokinetic variability varies from drug to drug.
Introduction Pharmacokinetic variability in disease state is common in clinical practice, but its underlying mechanism remains unclear. Recently, gut microbiota has been considered to be pharmacokinetically equivalent to the host liver. Although some studies have explored the roles of gut microbiota and host Cyp450s in drug pharmacokinetics, few have explored their effects on pharmacokinetic variability, especially in disease states. Objectives In this study, we aim to investigate the effects of gut microbiota and host Cyp450s on pharmacokinetic variability in mice with non-alcoholic steatohepatitis (NASH), and to elucidate the contribution of gut microbiota and host Cyp450s to pharmacokinetic variability in this setting. Methods The pharmacokinetic variability of mice with NASH was explored under intragastric and intravenous administrations of a cocktail mixture of omeprazole, phenacetin, midazolam, tolbutamide, chlorzoxazone, and metoprolol, after which the results were compared with those obtained from the control group. Thereafter, the pharmacokinetic variabilities of all drugs and their relations to the changes in gut microbiota and host Cyp450s were compared and analyzed. Results The exposures of all drugs, except metoprolol, significantly increased in the NASH group under intragastric administration. However, no significant increase in the exposure of all drugs, except tolbutamide, was observed in the NASH group under intravenous administration. The pharmacokinetic variabilities of phenacetin, midazolam, omeprazole, and chlorzoxazone were mainly associated with decreased elimination activity in the gut microbiota. By contrast, the pharmacokinetic variability of tolbutamide was mainly related to the change in the host Cyp2c65. Notably, gut microbiota and host Cyp450s exerted minimal effects on the pharmacokinetic variability of metoprolol. Conclusion Gut microbiota and host Cyp450s co-contribute to the pharmacokinetic variability in mice with NASH, and the degree of contribution varies from drug to drug. The present findings provide new insights into the explanation of pharmacokinetic variability in disease states.
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Affiliation(s)
- Jing Guo
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, Hunan, China; Institute of Clinical Pharmacology, Central South University, Changsha, Hunan, China; Engineering Research Center of Applied Technology of Pharmacogenomics, Ministry of Education, Changsha, Hunan, China; National Clinical Research Center for Geriatric Disorders, Changsha, Hunan, China
| | - Ying Xu
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, Hunan, China; Institute of Clinical Pharmacology, Central South University, Changsha, Hunan, China; Engineering Research Center of Applied Technology of Pharmacogenomics, Ministry of Education, Changsha, Hunan, China; National Clinical Research Center for Geriatric Disorders, Changsha, Hunan, China
| | - Li-Jie Chen
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, Hunan, China; Institute of Clinical Pharmacology, Central South University, Changsha, Hunan, China; Engineering Research Center of Applied Technology of Pharmacogenomics, Ministry of Education, Changsha, Hunan, China; National Clinical Research Center for Geriatric Disorders, Changsha, Hunan, China
| | - Song-Xia Zhang
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, Hunan, China; Institute of Clinical Pharmacology, Central South University, Changsha, Hunan, China; Engineering Research Center of Applied Technology of Pharmacogenomics, Ministry of Education, Changsha, Hunan, China; National Clinical Research Center for Geriatric Disorders, Changsha, Hunan, China
| | - Yu-Ligh Liou
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, Hunan, China; Institute of Clinical Pharmacology, Central South University, Changsha, Hunan, China; Engineering Research Center of Applied Technology of Pharmacogenomics, Ministry of Education, Changsha, Hunan, China; National Clinical Research Center for Geriatric Disorders, Changsha, Hunan, China
| | - Xiao-Ping Chen
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, Hunan, China; Institute of Clinical Pharmacology, Central South University, Changsha, Hunan, China; Engineering Research Center of Applied Technology of Pharmacogenomics, Ministry of Education, Changsha, Hunan, China; National Clinical Research Center for Geriatric Disorders, Changsha, Hunan, China
| | - Zhi-Rong Tan
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, Hunan, China; Institute of Clinical Pharmacology, Central South University, Changsha, Hunan, China; Engineering Research Center of Applied Technology of Pharmacogenomics, Ministry of Education, Changsha, Hunan, China; National Clinical Research Center for Geriatric Disorders, Changsha, Hunan, China
| | - Hong-Hao Zhou
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, Hunan, China; Institute of Clinical Pharmacology, Central South University, Changsha, Hunan, China; Engineering Research Center of Applied Technology of Pharmacogenomics, Ministry of Education, Changsha, Hunan, China; National Clinical Research Center for Geriatric Disorders, Changsha, Hunan, China
| | - Wei Zhang
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, Hunan, China; Institute of Clinical Pharmacology, Central South University, Changsha, Hunan, China; Engineering Research Center of Applied Technology of Pharmacogenomics, Ministry of Education, Changsha, Hunan, China; National Clinical Research Center for Geriatric Disorders, Changsha, Hunan, China
| | - Yao Chen
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, Hunan, China; Institute of Clinical Pharmacology, Central South University, Changsha, Hunan, China; Engineering Research Center of Applied Technology of Pharmacogenomics, Ministry of Education, Changsha, Hunan, China; National Clinical Research Center for Geriatric Disorders, Changsha, Hunan, China.
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5
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Lebeuf M, Turgeon N, Faubert C, Pleau A, Robillard J, Paradis É, Marette A, Duchaine C. Contaminants and Where to Find Them: Microbiological Quality Control in Axenic Animal Facilities. Front Microbiol 2021; 12:709399. [PMID: 34484147 PMCID: PMC8415547 DOI: 10.3389/fmicb.2021.709399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 07/26/2021] [Indexed: 11/13/2022] Open
Abstract
The use of axenic animal models in experimental research has exponentially grown in the past few years and the most reliable way for confirming their axenic status remains unclear. It is especially the case when using individual ventilated positive-pressure cages such as the Isocage. This type of cage are at a greater risk of contamination and expose animals to a longer handling process leading to more potential stress when opened compared to isolators. The aim of this study was to propose simple ways to detect microbial contaminants with Isocages type isolator resulting by developing, validating and optimizing three different methods (culture, microscopy, and molecular). These three approaches were also tested in situ by spiking 21 axenic mice with different microorganisms. Our results suggest that the culture method can be used for feces and surface station (IBS) swabs exclusively (in Brain Heart Infusion for 7 days at 25°C and 37°C in aerobic conditions, and at 30°C in anaerobic conditions), while microscopy (wet mounts) and molecular method (quantitative PCR) were only suitable for fecal matter analyses. In situ results suggests that the culture and molecular methods can detect up to 100% of bacterial contamination events while the microscopy approach generates many erroneous results when not performed by a skilled microscopist. In situ results also suggest that when an axenic mouse is contaminated by a microbial agent, the microorganism will colonize the mouse to such an extent that detection is obvious in 4 days, in average. This report validates simple but complimentary tests that can be used for optimal detection of contaminants in axenic animal facilities using Isocage type isolators.
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Affiliation(s)
- Maria Lebeuf
- Département de Biochimie, Microbiologie et Bio-Informatique, Université Laval, Quebec City, QC, Canada
| | - Nathalie Turgeon
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec City, QC, Canada
| | - Cynthia Faubert
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec City, QC, Canada
| | - Alexandre Pleau
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec City, QC, Canada
| | - Justin Robillard
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec City, QC, Canada
| | - Éric Paradis
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec City, QC, Canada
| | - André Marette
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec City, QC, Canada.,Département de Médecine, Université Laval, Quebec City, QC, Canada.,Pfizer Canada - CIHR Chair in the Pathogenesis of Insulin Resistance and Cardiovascular Diseases, Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec City, QC, Canada
| | - Caroline Duchaine
- Département de Biochimie, Microbiologie et Bio-Informatique, Université Laval, Quebec City, QC, Canada.,Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec City, QC, Canada.,Tier-1 Canada Research Chair in Bioaerosols, Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec City, QC, Canada
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6
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Lebeuf M, Turgeon N, Faubert C, Robillard J, Paradis É, Duchaine C. Managing the bacterial contamination risk in an axenic mice animal facility. Can J Microbiol 2021; 67:657-666. [PMID: 33844954 DOI: 10.1139/cjm-2020-0519] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A gap exists between good laboratory practices with axenic animals and the procedures applied. This work examined the efficacy of sodium dichloroisocyanurate (MB-10) and potassium peroxymonosulfate (Virkon™) disinfectants, as well as the appropriate soaking time for materials used with the ISOcage Biosafety Station™. We also compared the microbial load in cage systems hosting mice over 2 weeks in axenic rooms (ARs) and in typical specific-pathogen-free (SPF) non-axenic rooms (NARs) to identify resistant microorganisms, targeted for longer soaking disinfection, and evaluated the necessary procedures for reducing the microbial load in AR. Staphylococcus was the most frequently isolated genus (in both ARs and NARs). An average of three spore-forming microorganisms per cage were counted from AR. The disinfection time to reach 1 log reduction for Bacillus atrophaeus spores varied from 138 s (100 ppm MB-10) to 290 (Virkon™) to <20 s for S. epidermidis (100 ppm MB-10). AR management protocols lead to a microbial load that is 1000 times lower than that found in NARs. Data comparing the microbial load in SPF and axenic facilities can be used to improve the effectiveness of their microbial control procedures.
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Affiliation(s)
- Maria Lebeuf
- Département de biochimie, microbiologie et bioinformatique, Université Laval, Quebec city, Quebec, Canada
| | - Nathalie Turgeon
- Research center, Institut universitaire de cardiologie et de pneumologie de Québec, Quebec City, Quebec, Canada
| | - Cynthia Faubert
- Research animal facility, Institut universitaire de cardiologie et de pneumologie de Québec, Quebec City, Quebec, Canada
| | - Justin Robillard
- Research animal facility, Institut universitaire de cardiologie et de pneumologie de Québec, Quebec City, Quebec, Canada
| | - Éric Paradis
- Research center, Institut universitaire de cardiologie et de pneumologie de Québec, Quebec City, Quebec, Canada
| | - Caroline Duchaine
- Département de biochimie, microbiologie et bioinformatique, Université Laval, Quebec city, Quebec, Canada; Tier-1, Canada Research Chair on Bioaerosols, Institutuniversitaire de cardiologie et de pneumologie de Québec, Quebec City, Quebec, Canada
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Gheorghe CE, Ritz NL, Martin JA, Wardill HR, Cryan JF, Clarke G. Investigating causality with fecal microbiota transplantation in rodents: applications, recommendations and pitfalls. Gut Microbes 2021; 13:1941711. [PMID: 34328058 PMCID: PMC8331043 DOI: 10.1080/19490976.2021.1941711] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 06/02/2021] [Accepted: 06/04/2021] [Indexed: 02/04/2023] Open
Abstract
In recent years, studies investigating the role of the gut microbiota in health and diseases have increased enormously - making it essential to deepen and question the research methodology employed. Fecal microbiota transplantation (FMT) in rodent studies (either from human or animal donors) allows us to better understand the causal role of the intestinal microbiota across multiple fields. However, this technique lacks standardization and requires careful experimental design in order to obtain optimal results. By comparing several studies in which rodents are the final recipients of FMT, we summarize the common practices employed. In this review, we document the limitations of this method and highlight different parameters to be considered while designing FMT Studies. Standardizing this method is challenging, as it differs according to the research topic, but avoiding common pitfalls is feasible. Several methodological questions remain unanswered to this day and we offer a discussion on issues to be explored in future studies.
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Affiliation(s)
- Cassandra E. Gheorghe
- Department of Psychiatry and Neurobehavioral Science, University College Cork, Cork, Ireland
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Nathaniel L. Ritz
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Jason A. Martin
- Department of Psychiatry and Neurobehavioral Science, University College Cork, Cork, Ireland
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Hannah R. Wardill
- Precision Medicine, South Australian Health and Medical Research Institute (SAHMRI), Adelaide, Australia
- Adelaide Medical School, the University of Adelaide, Adelaide, Australia
| | - John F. Cryan
- Department of Psychiatry and Neurobehavioral Science, University College Cork, Cork, Ireland
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Gerard Clarke
- Department of Psychiatry and Neurobehavioral Science, University College Cork, Cork, Ireland
- APC Microbiome Ireland, University College Cork, Cork, Ireland
- INFANT Research Centre, University College Cork, Cork, Ireland
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Ka Y, Ogura T, Tomiyama K, Ueno M, Nozu R, Tsuruzono N, Nozawa Y, Hamano M, Takakura A, Takahashi R. Creation of an experimental rearing environment for microbiome animal research using an individually ventilated cage system and bioBUBBLE enclosure. Exp Anim 2020; 70:177-184. [PMID: 33239489 PMCID: PMC8150247 DOI: 10.1538/expanim.20-0129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
To avoid microbial contamination risk, vinyl film isolators are generally used in animal microbiome experiments involving germ-free (GF) mice and/or
gnotobiotic (GB) mice. However, it can take several months to gain expertise in operating the isolator competently. Furthermore, sterilization and sterility
testing, which are essential for isolator preparation, can take more than 20 days. Hence, we built an experimental rearing environment that combines an
individual ventilation cage system and a bioBUBBLE clean room enclosure to easily set up an experimental animal microbiome environment for animal facilities. In
this work, a three-step evaluation was conducted. First, we examined whether GF mice can be maintained in this rearing environment without bacterial
contamination. Next, we examined whether GF and GB mice can be maintained without cross-contamination in one individual ventilation cage rack. Finally, we
tested whether GF mice can be maintained in a biological safety cabinet controlled by negative pressure. In our series of experiments, no microbial
contamination occurred over more than 3 months. These results indicated that our rearing system that combines the individual ventilation cage and bioBUBBLE
systems can be used not only for experiments with GF mice but also for Biosafety Level 2 experiments that handle bacteria. Our system can mitigate various
disadvantages of using vinyl film isolators. In conclusion, we established an experimental method with improved working time and efficiency compared with those
of the previous vinyl isolator method.
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Affiliation(s)
- Yuyo Ka
- Central Institute for Experimental Animals, 3-25-12 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-0821, Japan
| | - Tomoyuki Ogura
- Central Institute for Experimental Animals, 3-25-12 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-0821, Japan
| | - Kayo Tomiyama
- Central Institute for Experimental Animals, 3-25-12 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-0821, Japan
| | - Masami Ueno
- Central Institute for Experimental Animals, 3-25-12 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-0821, Japan
| | - Ryoko Nozu
- Central Institute for Experimental Animals, 3-25-12 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-0821, Japan
| | - Nobuyuki Tsuruzono
- NOMURA JIMUSHO, Inc., Hibiya Central Bldg, 1-2-9 Nishi Shimbashi, Minato-ku, Tokyo 105-0003, Japan
| | - Yuya Nozawa
- CLEA Japan, Inc., 1-2-7 Higashiyama, Meguro-ku, Tokyo 153-8533, Japan
| | - Mariko Hamano
- CLEA Japan, Inc., 1-2-7 Higashiyama, Meguro-ku, Tokyo 153-8533, Japan
| | - Akira Takakura
- Central Institute for Experimental Animals, 3-25-12 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-0821, Japan
| | - Riichi Takahashi
- Central Institute for Experimental Animals, 3-25-12 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-0821, Japan
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Chen YC, Miao ZF, Yip KL, Cheng YA, Liu CJ, Li LH, Lin CY, Wang JW, Wu DC, Cheng TL, Wang JY. Gut Fecal Microbiota Transplant in a Mouse Model of Orthotopic Rectal Cancer. Front Oncol 2020; 10:568012. [PMID: 33194651 PMCID: PMC7658813 DOI: 10.3389/fonc.2020.568012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 10/06/2020] [Indexed: 12/12/2022] Open
Abstract
The gut microbiota is reported to play an important role in carcinogenesis and the treatment of CRC. SW480 and SW620 colon cancer cells integrated with infrared fluorescent proteins were injected into the rectal submucosa of nude mice. In the subsequent 30 days, we observed tumor growth weekly using an in vivo imaging system. The bacterial solution was infused anally into the mice to perform bacterial transplant. Phosphate-buffered saline, Acinetobacter lwoffii, and Bifidobacterium longum solutions were infused individually. The 16S ribosomal DNA (rDNA) and polymerase chain reaction of murine feces were investigated to confirm the colonization of target bacteria. In the SW620 orthotopic xenograft rectal cancer model, 4 of 5 mice developed rectal cancer by 30 days after submucosal injection. In the SW480 orthotopic xenograft rectal cancer model, 2 of 6 mice developed rectal cancer by 30 days after submucosal injection. For the 16S rDNA analysis, the mice receiving the bacterial solution infusion demonstrated positive findings for A. lwoffii and B. longum. With the successful establishment of a mouse model of orthotopic rectal cancer and transplant of target bacteria, we can further explore the relationship between gut microbiota and CRC. The role of fecal microbiota transplant in the treatment and alleviation of adverse events of chemotherapy in CRC could be clarified in subsequent studies.
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Affiliation(s)
- Yen-Cheng Chen
- Division of Colorectal Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Zhi-Feng Miao
- Division of Colorectal Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Kwan-Ling Yip
- Division of Colorectal Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yi-An Cheng
- Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung, Taiwan.,Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chung-Jung Liu
- Division of Gastroenterology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Ling-Hui Li
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Chung-Yen Lin
- Institute of Information Science, Academia Sinica, Taipei, Taiwan
| | - Jiunn-Wei Wang
- Division of Gastroenterology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.,Department of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Deng-Chyang Wu
- Division of Gastroenterology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.,Department of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Tian-Lu Cheng
- Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung, Taiwan.,Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan.,College of Medicine, Graduate Institute of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Jaw-Yuan Wang
- Division of Colorectal Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,College of Medicine, Graduate Institute of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Surgery, Faculty of Medicine, College of Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Graduate Institute of Clinical Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Center for Cancer Research, Kaohsiung Medical University, Kaohsiung, Taiwan.,Center for Liquid Biopsy and Cohort Research, Kaohsiung Medical University, Kaohsiung, Taiwan
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