151
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de Souza-Silva TG, Oliveira IA, da Silva GG, Giusti FCV, Novaes RD, de Almeida Paula HA. Impact of microplastics on the intestinal microbiota: A systematic review of preclinical evidence. Life Sci 2022; 294:120366. [DOI: 10.1016/j.lfs.2022.120366] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 01/25/2022] [Accepted: 01/26/2022] [Indexed: 12/14/2022]
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152
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Dhurjad P, Dhavaliker C, Gupta K, Sonti R. Exploring drug metabolism by the gut microbiota: modes of metabolism and experimental approaches. Drug Metab Dispos 2021; 50:224-234. [PMID: 34969660 DOI: 10.1124/dmd.121.000669] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 09/08/2021] [Indexed: 11/22/2022] Open
Abstract
Increasing evidence uncovers the involvement of gut microbiota in the metabolism of numerous pharmaceutical drugs. The human gut microbiome harbours 10-100 trillion symbiotic gut microbial bacteria that utilize drugs as substrates for enzymatic processes to alter host metabolism. Thus, microbiota-mediated drug metabolism can change the conventional drug action course and cause inter-individual differences in efficacy and toxicity, making it vital for drug discovery and development. This review focuses on drug biotransformation pathways and discusses different models for evaluating gut microbiota role in drug metabolism. Significance Statement This review emphasizes the importance of gut microbiota and different modes of drug metabolism mediated by them. It provides information on in vivo, in vitro, ex vivo, in silico and multi-omics approaches for identifying the role of gut microbiota in the metabolism. Further, it highlights the significance of gut microbiota mediated metabolism in the process of new drug discovery and development as a rationale for safe and efficacious drug therapy.
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Affiliation(s)
- Pooja Dhurjad
- National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Chinmayi Dhavaliker
- National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Kajal Gupta
- National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Rajesh Sonti
- National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
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153
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Boscaini S, Leigh SJ, Lavelle A, García-Cabrerizo R, Lipuma T, Clarke G, Schellekens H, Cryan JF. Microbiota and body weight control: Weight watchers within? Mol Metab 2021; 57:101427. [PMID: 34973469 PMCID: PMC8829807 DOI: 10.1016/j.molmet.2021.101427] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 12/08/2021] [Accepted: 12/23/2021] [Indexed: 02/07/2023] Open
Abstract
Background Despite several decades of research, managing body weight remains an unsolved clinical problem. Health problems associated with dysregulated body weight, such as obesity and cachexia, exhibit several gut microbiota alterations. There is an increased interest in utilising the gut microbiota for body weight control, as it responds to intervention and plays an important role in energy extraction from food, as well as biotransformation of nutrients. Scope of the review This review provides an overview of the role of the gut microbiota in the physiological and metabolic alterations observed in two body weight dysregulation-related disorders, namely obesity and cachexia. Second, we assess the available evidence for different strategies, including caloric restriction, intermittent fasting, ketogenic diet, bariatric surgery, probiotics, prebiotics, synbiotics, high-fibre diet, and fermented foods – effects on body weight and gut microbiota composition. This approach was used to give insights into the possible link between body weight control and gut microbiota configuration. Major conclusions Despite extensive associations between body weight and gut microbiota composition, limited success could be achieved in the translation of microbiota-related interventions for body weight control in humans. Manipulation of the gut microbiota alone is insufficient to alter body weight and future research is needed with a combination of strategies to enhance the effects of lifestyle interventions. The gut microbiota is involved in the control of nutrient availability, appetite, and body weight. Both obesity and cachexia are associated with altered gut microbiota. Specific dietary and surgical approaches positively impact body weight and gut microbiota. Manipulation of the gut microbiota alone is insufficient to alter body weight in humans.
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Affiliation(s)
- Serena Boscaini
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | | | - Aonghus Lavelle
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
| | | | - Timothy Lipuma
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
| | - Gerard Clarke
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland
| | - Harriët Schellekens
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
| | - John F Cryan
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland.
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154
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Sowers TD, Bone SE, Noerpel MR, Blackmon MD, Karna RR, Scheckel KG, Juhasz AL, Diamond GL, Thomas DJ, Bradham KD. Plumbojarosite Remediation of Soil Affects Lead Speciation and Elemental Interactions in Soil and in Mice Tissues. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:15950-15960. [PMID: 34806356 PMCID: PMC9606633 DOI: 10.1021/acs.est.1c06067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Lead (Pb) contamination of soils is of global concern due to the devastating impacts of Pb exposure in children. Because early-life exposure to Pb has long-lasting health effects, reducing exposure in children is a critical public health goal that has intensified research on the conversion of soil Pb to low bioavailability phases. Recently, plumbojarosite (PLJ) conversion of highly available soil Pb was found to decrease Pb relative bioavailability (RBA <10%). However, there is sparse information concerning interactions between Pb and other elements when contaminated soil, pre- and post-remediation, is ingested and moves through the gastrointestinal tract (GIT). Addressing this may inform drivers of effective chemical remediation strategies. Here, we utilize bulk and micro-focused Pb X-ray absorption spectroscopy to probe elemental interactions and Pb speciation in mouse diet, cecum, and feces samples following ingestion of contaminated soils pre- and post-PLJ treatment. RBA of treated soils was less than 1% with PLJ phases transiting the GIT with little absorption. In contrast, Pb associated with organics was predominantly found in the cecum. These results are consistent with transit of insoluble PLJ to feces following ingestion. The expanded understanding of Pb interactions during GIT transit complements our knowledge of elemental interactions with Pb that occur at higher levels of biological organization.
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Affiliation(s)
- Tyler D Sowers
- Center of Environmental Measurement and Modeling, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, North Carolina 27711, United States
| | - Sharon E Bone
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Matthew R Noerpel
- Center for Environmental Solutions & Emergency Response, Office of Research and Development, US Environmental Protection Agency, Cincinnati, Ohio 45268, United States
| | - Matthew D Blackmon
- Center of Environmental Measurement and Modeling, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, North Carolina 27711, United States
| | - Ranju R Karna
- Bennett Aerospace, Inc., Engineer Research and Development Center, USACE, Vicksburg, Mississippi 39183, United States
| | - Kirk G Scheckel
- Center for Environmental Solutions & Emergency Response, Office of Research and Development, US Environmental Protection Agency, Cincinnati, Ohio 45268, United States
| | - Albert L Juhasz
- Future Industries Institute, University of South Australia, Mawson Lakes Campus, Adelaide, SA 5095, Australia
| | - Gary L Diamond
- SRC, Inc., North Syracuse, New York 13212, United States
| | - David J Thomas
- Center for Computational Toxicology & Exposure, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, North Carolina 27711, United States
| | - Karen D Bradham
- Center of Environmental Measurement and Modeling, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, North Carolina 27711, United States
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155
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Thurman CE, Klores MM, Wolfe AE, Poueymirou WT, Levee EM, Ericsson AC, Franklin CL, Reddyjarugu B. Effect of Housing Condition and Diet on the Gut Microbiota of Weanling Immunocompromised Mice. Comp Med 2021; 71:485-491. [PMID: 34782034 PMCID: PMC8718622 DOI: 10.30802/aalas-cm-21-000015] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Gastrointestinal microbiota are affected by a wide variety of extrinsic and intrinsic factors. In the husbandry of laboratory mice and design of experiments, controlling these factors where possible provides more reproducible results. However, the microbiome is dynamic, particularly in the weeks immediately after weaning. In this study, we characterized the baseline gastrointestinal microbiota of immunocompromised mice housed under standard conditions for our facility for 6 weeks after weaning, with housing either in an isolator or in individually ventilated cages and a common antibiotic diet (trimethoprim sulfamethoxazole). We compared these conditions to a group fed a standard diet and a group that was weaned to a standard diet then switched to antibiotic diet after 2 weeks. We found no clear effect of diet on richness and α diversity of the gastrointestinal microbiota. However, diet did affect which taxa were enriched at the end of the experiment. The change to antibiotic diet during the experiment did not convert the gastrointestinal microbiome to a state similar to mice consistently fed antibiotic diet, which may highlight the importance of the initial post-weaning period in the establishment of the gastrointestinal microbiome. We also observed a strong effect of housing type (isolator compared with individually ventilated cage) on the richness, α diversity, β diversity, and taxa enriched over the course of the experiment. Investigating whether the diet or microbiome affects a certain strain's phenotype is warranted in some cases. However, our findings do not suggest that maintaining immunocompromised mice on antibiotic feed has a clinical benefit when potential pathogens are operationally excluded, nor does it result in a more consistent or controlled microbiome in the post-weaning period.
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Affiliation(s)
- Colleen E Thurman
- Regeneron Pharmaceuticals, Tarrytown, New York; NYU-Regeneron Training Program in Laboratory Animal Medicine, New York, New York; Animal Science Center, Boston University, Boston, Massachusetts;,
| | - Molly M Klores
- Regeneron Pharmaceuticals, Tarrytown, New York;,NYU-Regeneron Training Program in Laboratory Animal Medicine, New York, New York
| | - Annie E Wolfe
- Department of Veterinary Pathobiology, University of Missouri College of Veterinary Medicine
| | | | - Ellen M Levee
- Regeneron Pharmaceuticals, Tarrytown, New York;,NYU-Regeneron Training Program in Laboratory Animal Medicine, New York, New York
| | - Aaron C Ericsson
- Department of Veterinary Pathobiology, University of Missouri College of Veterinary Medicine,,University of Missouri Metagenomics Center, and,MU Mutant Mouse Resource and Research Center, University of Missouri, Columbia, Missouri
| | - Craig L Franklin
- Department of Veterinary Pathobiology, University of Missouri College of Veterinary Medicine,,University of Missouri Metagenomics Center, and,MU Mutant Mouse Resource and Research Center, University of Missouri, Columbia, Missouri
| | - Balu Reddyjarugu
- Regeneron Pharmaceuticals, Tarrytown, New York;,NYU-Regeneron Training Program in Laboratory Animal Medicine, New York, New York
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156
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Fung C, Cools B, Malagola S, Martens T, Tack J, Kazwiny Y, Vanden Berghe P. Luminal short-chain fatty acids and 5-HT acutely activate myenteric neurons in the mouse proximal colon. Neurogastroenterol Motil 2021; 33:e14186. [PMID: 34121274 DOI: 10.1111/nmo.14186] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 04/03/2021] [Accepted: 05/04/2021] [Indexed: 12/17/2022]
Abstract
BACKGROUND Gastrointestinal (GI) function is critically dependent on the control of the enteric nervous system (ENS), which is situated within the gut wall and organized into two ganglionated nerve plexuses: the submucosal and myenteric plexus. The ENS is optimally positioned and together with the intestinal epithelium, is well-equipped to monitor the luminal contents such as microbial metabolites and to coordinate appropriate responses accordingly. Despite the heightened interest in the gut microbiota and its influence on intestinal physiology and pathophysiology, how they interact with the host ENS remains unclear. METHODS Using full-thickness proximal colon preparations from transgenic Villin-CreERT2;R26R-GCaMP3 and Wnt1-Cre;R26R-GCaMP3 mice, which express a fluorescent Ca2+ indicator in their intestinal epithelium or in their ENS, respectively, we examined the effects of key luminal microbial metabolites (SCFAs and 5-HT) on the mucosa and underlying enteric neurons. KEY RESULTS We show that the SCFAs acetate, propionate, and butyrate, as well as 5-HT can, to varying extents, acutely elicit epithelial and neuronal Ca2+ responses. Furthermore, SCFAs exert differential effects on submucosal and myenteric neurons. Additionally, we found that submucosal ganglia are predominantly aligned along the striations of the transverse mucosal folds in the proximal colon. CONCLUSIONS & INFERENCES Taken together, our study demonstrates that different microbial metabolites, including SCFAs and 5-HT, can acutely stimulate Ca2+ signaling in the mucosal epithelium and in enteric neurons.
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Affiliation(s)
- Candice Fung
- Laboratory for Enteric NeuroScience (LENS) Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium
| | - Bert Cools
- Laboratory for Enteric NeuroScience (LENS) Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium
| | - Sergio Malagola
- Laboratory for Enteric NeuroScience (LENS) Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium
| | - Tobias Martens
- Laboratory for Enteric NeuroScience (LENS) Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium
| | - Jan Tack
- Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium
| | - Youcef Kazwiny
- Laboratory for Enteric NeuroScience (LENS) Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium
| | - Pieter Vanden Berghe
- Laboratory for Enteric NeuroScience (LENS) Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium
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157
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Effects of L. plantarum HY7715 on the Gut Microbial Community and Riboflavin Production in a Three-Stage Semi-Continuous Simulated Gut System. Microorganisms 2021; 9:microorganisms9122478. [PMID: 34946080 PMCID: PMC8704370 DOI: 10.3390/microorganisms9122478] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/23/2021] [Accepted: 11/26/2021] [Indexed: 12/26/2022] Open
Abstract
Probiotics should be well established in the gut, passing through the digestive tract with a high degree of viability, and produce metabolites that improve the gut environment by interacting with the gut microbiome. Our previous study revealed that the Lactiplantibacillus plantarum HY7715 strain shows good bile acid resistance and a riboflavin production capacity. To confirm the interaction between HY7715 and gut microbiome, we performed a metabolite and microbiome study using a simulated gut system (SGS) that mimics the intestinal environment. Changes in the microbiome were confirmed and compared with L. plantarum NCDO1752 as the control. After 14 days, the HY7715 treatment group showed a relatively high butyrate content compared to the control group, which showed increased acetate and propionate concentrations. Moreover, the riboflavin content was higher in the HY7715 treatment group, whereas the NCDO1752 treatment group produced only small amounts of riboflavin during the treatment period and showed a tendency to decrease during the washout stage; however, the HY7715 group produced riboflavin continuously in the ascending colon during the washout period. A correlation analysis of the genus that increased as the content of riboflavin increased revealed butyrate-producing microorganisms, such as Blautia and Flavonifractor. In conclusion, treatment with L. plantarum HY7715 induced the production and maintenance of riboflavin and the enrichment of the intestinal microbiome
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158
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Song X, An Y, Chen D, Zhang W, Wu X, Li C, Wang S, Dong W, Wang B, Liu T, Zhong W, Sun T, Cao H. Microbial metabolite deoxycholic acid promotes vasculogenic mimicry formation in intestinal carcinogenesis. Cancer Sci 2021; 113:459-477. [PMID: 34811848 PMCID: PMC8819290 DOI: 10.1111/cas.15208] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 10/30/2021] [Accepted: 11/08/2021] [Indexed: 12/15/2022] Open
Abstract
A high-fat diet (HFD) leads to long-term exposure to gut microbial metabolite secondary bile acids, such as deoxycholic acid (DCA), in the intestine, which is closely linked to colorectal cancer (CRC). Evidence reveals that vasculogenic mimicry (VM) is a critical event for the malignant transformation of cancer. Therefore, this study investigated the crucial roles of DCA in the regulation of VM and the progression of intestinal carcinogenesis. The effects of an HFD on VM formation and epithelial-mesenchymal transition (EMT) in human CRC tissues were investigated. The fecal DCA level was detected in HFD-treated Apcmin/+ mice. Then the effects of DCA on VM formation, EMT, and vascular endothelial growth factor receptor 2 (VEGFR2) signaling were evaluated in vitro and in vivo. Here we demonstrated that compared with a normal diet, an HFD exacerbated VM formation and EMT in CRC patients. An HFD could alter the composition of the gut microbiota and significantly increase the fecal DCA level in Apcmin/+ mice. More importantly, DCA promoted tumor cell proliferation, induced EMT, increased VM formation, and activated VEGFR2, which led to intestinal carcinogenesis. In addition, DCA enhanced the proliferation and migration of HCT-116 cells, and induced EMT process and vitro tube formation. Furthermore, the silence of VEGFR2 reduced DCA-induced EMT, VM formation, and migration. Collectively, our results indicated that microbial metabolite DCA promoted VM formation and EMT through VEGFR2 activation, which further exacerbated intestinal carcinogenesis.
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Affiliation(s)
- Xueli Song
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin Medical University, Tianjin, China
| | - Yaping An
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin Medical University, Tianjin, China
| | - Danfeng Chen
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin Medical University, Tianjin, China
| | - Wanru Zhang
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin Medical University, Tianjin, China
| | - Xuemei Wu
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin Medical University, Tianjin, China
| | - Chuqiao Li
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin Medical University, Tianjin, China
| | - Sinan Wang
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin Medical University, Tianjin, China
| | - Wenxiao Dong
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin Medical University, Tianjin, China
| | - Bangmao Wang
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin Medical University, Tianjin, China
| | - Tianyu Liu
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin Medical University, Tianjin, China
| | - Weilong Zhong
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin Medical University, Tianjin, China
| | - Tao Sun
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy, Nankai University, Tianjin, China
| | - Hailong Cao
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin Medical University, Tianjin, China
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159
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Wang X, Wu M. Research progress of gut microbiota and frailty syndrome. Open Med (Wars) 2021; 16:1525-1536. [PMID: 34712824 PMCID: PMC8511967 DOI: 10.1515/med-2021-0364] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 07/27/2021] [Accepted: 08/23/2021] [Indexed: 12/30/2022] Open
Abstract
Frailty is a clinical syndrome caused by homeostasis imbalance. It is characterized by marked vulnerability to endogenous or exogenous stressors, reduced self-care ability, and increased mortality risk. This aging-related syndrome is common in individuals older than 65 years and carries an increased risk for poor health outcomes. These include falls, incident disability, incapacity, and mortality. In addition, it can result in a poor prognosis for other comorbidities. With the aging population, frailty increases the burden of adverse health outcomes. Studies on frailty are at their infancy. In addition, there is a lack of thorough understanding of its pathogenesis. Several studies have suggested that frailty is caused by chronic inflammation due to enhanced intestinal permeability following gut microbiota imbalance as well as pathogen-related antibodies entering the circulation system. These result in musculoskeletal system disorders and neurodegenerative diseases. However, this assumption has not been validated in large cohort-based studies. Several studies have suggested that inflammation is not the only cause of frailty. Hence, further studies are necessary to extend our understanding of its pathogenesis. This review summarizes the research findings in the field and expands on the possible role of the gut microbiota in frailty syndrome.
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Affiliation(s)
- Xiao Wang
- Geriatrics Department, Zhejiang Hospital, Hangzhou 310013, China
| | - Min Wu
- Geriatrics Department, Zhejiang Hospital, Hangzhou 310013, China
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160
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Yan Y, Li H, Fayyaz A, Gai Y. Metagenomic and network analysis revealed wide distribution of antibiotic resistance genes in monkey gut microbiota. Microbiol Res 2021; 254:126895. [PMID: 34742104 DOI: 10.1016/j.micres.2021.126895] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 10/09/2021] [Accepted: 10/13/2021] [Indexed: 12/31/2022]
Abstract
The emergence and spread of drug-resistant microorganisms that have acquired new resistance mechanisms, leading to antibiotic resistance, continue to threaten the health of humans and animals worldwide. Non-human primates (NHPs), as close living relatives of human beings in the world, have a high degree of genetic and physiological similarity to humans. However, despite its importance, we lack a comprehensive characterization or understanding of the similarities and differences of the antibiotic resistance genes of the gut microbiome carried by non-human primates and humans. In the present study, the diversity and abundance of antibiotic resistance genes carried by the gut microbiota of cynomolgus monkeys (Macaca fascicularis) were investigated by metagenomic analysis. In total, 60 resistance types conferring resistance to 11 categories of antibiotics were identified in the gut microbiome of cynomolgus monkeys. Interestingly, the composition and abundance of ARGs carried by the gut microbiota of cynomolgus monkeys can be significantly affected by dietary changes. Moreover, we found that all ARG types carried by humans are also present in cynomolgus monkeys. The tetracycline resistance gene tet(37) is evolutionarily conserved and highly homologous. Taken together, our study provides a comprehensive overview of the diversity and richness of ARGs in the gut microbiota of cynomolgus monkeys and underlines the potentially crucial role of diet in the gut health of monkeys and humans.
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Affiliation(s)
- Yueyang Yan
- Key Laboratory for Zoonoses Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Hao Li
- Key Laboratory of Plant Stress Biology, State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475001, China
| | - Amna Fayyaz
- Department of Plant Pathology, University of California, Davis, 95616, CA, USA
| | - Yunpeng Gai
- School of Grassland Science, Beijing Forestry University, Beijing, 100083, China; Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China.
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161
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Fois CAM, Schindeler A, Valtchev P, Dehghani F. Dynamic flow and shear stress as key parameters for intestinal cells morphology and polarization in an organ-on-a-chip model. Biomed Microdevices 2021; 23:55. [PMID: 34655329 PMCID: PMC8520520 DOI: 10.1007/s10544-021-00591-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/20/2021] [Indexed: 11/04/2022]
Abstract
Gut-on-a-chip microfluidic devices have emerged as versatile and practical systems for modeling the human intestine in vitro. Cells cultured under microfluidic conditions experience the effect of shear stress, used as a biomechanical cue to promote a faster cell polarization in Caco-2 cells when compared with static culture conditions. However, published systems to date have utilized a constant flow rate that fails to account for changes in cell shear stress (\documentclass[12pt]{minimal}
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\begin{document}$${\tau }_{c}$$\end{document}τc) resulting from changes in cell elongation that occur with differentiation. In this study, computational fluid dynamics (CFD) simulations predict that cells with villi-like morphology experience a \documentclass[12pt]{minimal}
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\begin{document}$${\tau }_{c}$$\end{document}τc higher than bulge-like cells at the initial growth stages. Therefore, we investigated the use of a dynamic flow rate to maintain a constant \documentclass[12pt]{minimal}
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\begin{document}$${\tau }_{c}$$\end{document}τc across the experiment. Microscopic assessment of cell morphology and dome formation confirmed the initiation of Caco-2 polarization within three days. Next, adopting our dynamic approach, we evaluated whether the following decreased flow could still contribute to complete cell differentiation if compared with the standard constant flow methodology. Caco-2 cells polarized under both conditions, secreted mucin-2 and villin and formed tight junctions and crypt-villi structures. Gene expression was not impacted using the dynamic flow rate. In conclusion, our dynamic flow approach still facilitates cell differentiation while enabling a reduced consumption of reagents.
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Affiliation(s)
- Chiara A M Fois
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, 2006, Australia.,Centre for Advanced Food Engineering, The University of Sydney, Sydney, 2006, Australia
| | - Aaron Schindeler
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, 2006, Australia.,Centre for Advanced Food Engineering, The University of Sydney, Sydney, 2006, Australia.,Bioengineering & Molecular Medicine Laboratory, The Children's Hospital at Westmead and the Westmead Institute for Medical Research, Westmead, 2145, Australia
| | - Peter Valtchev
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, 2006, Australia.,Centre for Advanced Food Engineering, The University of Sydney, Sydney, 2006, Australia
| | - Fariba Dehghani
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, 2006, Australia. .,Centre for Advanced Food Engineering, The University of Sydney, Sydney, 2006, Australia.
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162
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Microbiota-brain interactions: Moving toward mechanisms in model organisms. Neuron 2021; 109:3930-3953. [PMID: 34653349 DOI: 10.1016/j.neuron.2021.09.036] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 08/03/2021] [Accepted: 09/17/2021] [Indexed: 02/07/2023]
Abstract
Changes in the microbiota are associated with alterations in nervous system structure-function and behavior and have been implicated in the etiology of neuropsychiatric and neurodegenerative disorders. Most of these studies have centered on mammalian models due to their phylogenetic proximity to humans. Indeed, the germ-free mouse has been a particularly useful model organism for investigating microbiota-brain interactions. However, microbiota-brain axis research on simpler genetic model organisms with a vast and diverse scientific toolkit (zebrafish, Drosophila melanogaster, and Caenorhabditis elegans) is now also coming of age. In this review, we summarize the current state of microbiota-brain axis research in rodents and humans, and then we elaborate and discuss recent research on the neurobiological and behavioral effects of the microbiota in the model systems of fish, flies, and worms. We propose that a cross-species, holistic and mechanistic approach to unravel the microbiota-brain communication is an essential step toward rational microbiota-based therapeutics to combat brain disorders.
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163
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Gastric Organoids: Progress and Remaining Challenges. Cell Mol Gastroenterol Hepatol 2021; 13:19-33. [PMID: 34547535 PMCID: PMC8600088 DOI: 10.1016/j.jcmgh.2021.09.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 09/11/2021] [Accepted: 09/13/2021] [Indexed: 12/11/2022]
Abstract
The stomach is a complex and physiologically necessary organ, yet large differences in physiology between mouse and human stomachs have impeded translation of physiological discoveries and drug screens performed using murine gastric tissues. Gastric cancer (GC) is a global health threat, with a high mortality rate and limited treatment options. The heterogeneous nature of GC makes it poorly suited for current "one size fits all" standard treatments. In this review, we discuss the rapidly evolving field of gastric organoids, with a focus on studies expanding cultures from primary human tissues and describing the benefits of mouse organoid models. We introduce the differing methods for culturing healthy gastric tissue from adult tissues or pluripotent stem cells, discuss the promise these systems have for preclinical drug screens, and highlight applications of organoids for precision medicine. Finally, we discuss the limitations of these models and look to the future to present potential ways gastric organoids will advance treatment options for patients with GC.
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Subacute Exposure to an Environmentally Relevant Dose of Di-(2-ethylhexyl) Phthalate during Gestation Alters the Cecal Microbiome, but Not Pregnancy Outcomes in Mice. TOXICS 2021; 9:toxics9090215. [PMID: 34564366 PMCID: PMC8470982 DOI: 10.3390/toxics9090215] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 08/24/2021] [Accepted: 09/01/2021] [Indexed: 01/04/2023]
Abstract
Di-2-ethylhexyl phthalate (DEHP) is a plasticizer commonly found in polyvinyl chloride, medical equipment, and food packaging. DEHP has been shown to target the reproductive system and alter the gut microbiome in humans and experimental animals. However, very little is known about the impact of DEHP-induced microbiome changes and its effects during pregnancy. Thus, the objective of this study was to investigate the effects of DEHP exposure during pregnancy on the cecal microbiome and pregnancy outcomes. Specifically, this study tested the hypothesis that subacute exposure to DEHP during pregnancy alters the cecal microbiome in pregnant mice, leading to changes in birth outcomes. To test this hypothesis, pregnant dams were orally exposed to corn oil vehicle or 20 µg/kg/day DEHP for 10 days and euthanized 21 days after their last dose. Cecal contents were collected for 16S Illumina and shotgun metagenomic sequencing. Fertility studies were also conducted to examine whether DEHP exposure impacted birth outcomes. Subacute exposure to environmentally relevant doses of DEHP in pregnant dams significantly increased alpha diversity and significantly altered beta diversity. Furthermore, DEHP exposure during pregnancy significantly increased the relative abundance of Bacteroidetes and decreased the relative abundance of Firmicutes and Deferribacteres compared with controls. The affected taxonomic families included Deferribacteraceae, Lachnospiraceae, and Mucisprillum. In addition to changes in the gut microbiota, DEHP exposure significantly altered 14 functional pathways compared with the control. Finally, DEHP exposure did not significantly impact the fertility and birth outcomes compared with the control. Collectively, these data indicate that DEHP exposure during pregnancy shifts the cecal microbiome, but the shifts do not impact fertility and birth outcomes.
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Abstract
ABSTRACT Burn injuries are a common form of traumatic injury that leads to significant morbidity and mortality worldwide. Burn injuries are characterized by inflammatory processes and alterations in numerous organ systems and functions. Recently, it has become apparent that the gastrointestinal bacterial microbiome is a key component of regulating the immune response and recovery from burn and can also contribute to significant detrimental sequelae after injury, such as sepsis and multiple organ failure. Microbial dysbiosis has been linked to multiple disease states; however, its role in exacerbating acute traumatic injuries, such as burn, is poorly understood. In this article, we review studies that document changes in the intestinal microbiome after burn injury, assess the implications in post-burn pathogenesis, and the potential for further discovery and research.
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Affiliation(s)
- Marisa E. Luck
- Burn & Shock Trauma Research Institute, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL 60153, USA
- Alcohol Research Program, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL 60153, USA
- Integrative Cell Biology Program, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL 60153, USA
| | - Caroline J. Herrnreiter
- Burn & Shock Trauma Research Institute, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL 60153, USA
- Alcohol Research Program, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL 60153, USA
- Biochemistry and Molecular Biology Program, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL 60153, USA
| | - Mashkoor A. Choudhry
- Burn & Shock Trauma Research Institute, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL 60153, USA
- Alcohol Research Program, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL 60153, USA
- Department of Surgery, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL 60153, USA
- Department of Microbiology and Immunology, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL 60153, USA
- Integrative Cell Biology Program, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL 60153, USA
- Biochemistry and Molecular Biology Program, Stritch School of Medicine, Loyola University Chicago Health Sciences Division, Maywood, IL 60153, USA
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Yang C, Long D, Sung J, Alghoul Z, Merlin D. Orally Administered Natural Lipid Nanoparticle-Loaded 6-Shogaol Shapes the Anti-Inflammatory Microbiota and Metabolome. Pharmaceutics 2021; 13:1355. [PMID: 34575431 PMCID: PMC8472296 DOI: 10.3390/pharmaceutics13091355] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Revised: 08/20/2021] [Accepted: 08/25/2021] [Indexed: 01/10/2023] Open
Abstract
The past decade has seen increasing interest in microbiota-targeting therapeutic strategies that aim to modulate the gut microbiota's composition and/or function to treat chronic diseases, such as inflammatory bowel disease (IBD), metabolic symptoms, and obesity. While targeting the gut microbiota is an innovative means for treating IBD, it typically requires an extended treatment time, hampering its potential application. Herein, using an established natural-lipid nanoparticle (nLNP) platform, we demonstrate that nLNPs encapsulated with the drug candidate 6-shogaol (6S/nLNP) distinctly altered microbiota composition within one day of treatment, significantly accelerating a process that usually requires five days using free 6-shogaol (6S). In addition, the change in the composition of the microbiota induced by five-day treatment with 6S/nLNP was maintained for at least 15 days (from day five to day 20). The consequent alteration in the fecal metabolic profile stemming from this compositional change manifested as functional changes that enhanced the in vitro anti-inflammatory and wound-healing efficacy of macrophage cells (Raw 264.7) and epithelial cells (Caco-2 BBE1), respectively. Further, this metabolic compositional change, as reflected in an altered metabolic profile, promoted a robust anti-inflammatory effect in a DSS-induced mouse model of acute colitis. Our study demonstrates that, by near-instantly modulating microbiota composition and function, an nLNP-based drug-delivery platform might be a powerful tool for treating ulcerative colitis.
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Affiliation(s)
- Chunhua Yang
- Digestive Disease Research Group, Institute for Biomedical Sciences, Georgia State University, Atlanta, GA 30303, USA; (D.L.); (J.S.); (Z.A.); (D.M.)
- Atlanta Veterans Affairs Medical Center, Decatur, GA 30302, USA
| | - Dingpei Long
- Digestive Disease Research Group, Institute for Biomedical Sciences, Georgia State University, Atlanta, GA 30303, USA; (D.L.); (J.S.); (Z.A.); (D.M.)
| | - Junsik Sung
- Digestive Disease Research Group, Institute for Biomedical Sciences, Georgia State University, Atlanta, GA 30303, USA; (D.L.); (J.S.); (Z.A.); (D.M.)
| | - Zahra Alghoul
- Digestive Disease Research Group, Institute for Biomedical Sciences, Georgia State University, Atlanta, GA 30303, USA; (D.L.); (J.S.); (Z.A.); (D.M.)
- Department of Chemistry, Georgia State University, Atlanta, GA 30303, USA
| | - Didier Merlin
- Digestive Disease Research Group, Institute for Biomedical Sciences, Georgia State University, Atlanta, GA 30303, USA; (D.L.); (J.S.); (Z.A.); (D.M.)
- Atlanta Veterans Affairs Medical Center, Decatur, GA 30302, USA
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167
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Surcel M, Munteanu A, Isvoranu G, Ibram A, Caruntu C, Constantin C, Neagu M. Unconventional Therapy with IgY in a Psoriatic Mouse Model Targeting Gut Microbiome. J Pers Med 2021; 11:jpm11090841. [PMID: 34575618 PMCID: PMC8466815 DOI: 10.3390/jpm11090841] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 08/22/2021] [Accepted: 08/25/2021] [Indexed: 12/15/2022] Open
Abstract
Psoriasis has a multifactorial pathogenesis and recently it was shown that alterations in the skin and intestinal microbiome are involved in the pathogenesis of psoriasis. Therefore, microbiome restoration becomes a promising preventive/therapy strategy in psoriasis. In our pre-clinical study design using a mice model of induced psoriatic dermatitis (Ps) we have tested the proof-of-concept that IgY raised against pathological human bacteria resistant to antibiotics can alleviate psoriatic lesions and restore deregulated immune cell parameters. Besides clinical evaluation of the mice and histology of the developed psoriatic lesions, cellular immune parameters were monitored. Immune cells populations/subpopulations from peripheral blood and spleen cell suspensions that follow the clinical improvement were assessed using flow cytometry. We have quantified T lymphocytes (CD3ε+) with T-helper (CD4+CD8-) and T-suppressor/cytotoxic (CD8a+CD4-) subsets, B lymphocytes (CD3ε-CD19+) and NK cells (CD3ε-NK1.1+). Improved clinical evolution of the induced Ps along with the restoration of immune cells parameters were obtained when orally IgY was administered. We pin-point that IgY specific compound can be used as a possible pre-biotic-like alternative adjuvant in psoriasis.
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Affiliation(s)
- Mihaela Surcel
- Immunology Department, “Victor Babes” National Institute of Pathology, 99-101 Spl. Independentei, 050096 Bucharest, Romania; (M.S.); (A.M.); (C.C.)
| | - Adriana Munteanu
- Immunology Department, “Victor Babes” National Institute of Pathology, 99-101 Spl. Independentei, 050096 Bucharest, Romania; (M.S.); (A.M.); (C.C.)
- Faculty of Biology, Doctoral School of Biology, University of Bucharest, 91-95 Spl. Independentei, 030018 Bucharest, Romania
| | - Gheorghita Isvoranu
- Animal Husbandry, “Victor Babes” National Institute of Pathology, 99-101 Spl. Independentei, 050096 Bucharest, Romania;
| | - Alef Ibram
- Research Laboratory, Romvac Company SA, 077190 Voluntari, Romania;
| | - Constantin Caruntu
- Department of Physiology, “Carol Davila” University of Pharmacy and Medicine, 37 Dionisie Lupu Street, 020021 Bucharest, Romania;
| | - Carolina Constantin
- Immunology Department, “Victor Babes” National Institute of Pathology, 99-101 Spl. Independentei, 050096 Bucharest, Romania; (M.S.); (A.M.); (C.C.)
- Department of Pathology, Colentina University Hospital, 020125 Bucharest, Romania
| | - Monica Neagu
- Immunology Department, “Victor Babes” National Institute of Pathology, 99-101 Spl. Independentei, 050096 Bucharest, Romania; (M.S.); (A.M.); (C.C.)
- Faculty of Biology, Doctoral School of Biology, University of Bucharest, 91-95 Spl. Independentei, 030018 Bucharest, Romania
- Department of Pathology, Colentina University Hospital, 020125 Bucharest, Romania
- Correspondence:
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Khan AA, Langston HC, Costa FC, Olmo F, Taylor MC, McCann CJ, Kelly JM, Lewis MD. Local association of Trypanosoma cruzi chronic infection foci and enteric neuropathic lesions at the tissue micro-domain scale. PLoS Pathog 2021; 17:e1009864. [PMID: 34424944 PMCID: PMC8412264 DOI: 10.1371/journal.ppat.1009864] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 09/02/2021] [Accepted: 08/04/2021] [Indexed: 11/19/2022] Open
Abstract
Digestive Chagas disease (DCD) is an enteric neuropathy caused by Trypanosoma cruzi infection. The mechanism of pathogenesis is poorly understood and the lack of a robust, predictive animal model has held back research. We screened a series of mouse models using gastrointestinal tracer assays and in vivo infection imaging systems to discover a subset exhibiting chronic digestive transit dysfunction and significant retention of faeces in both sated and fasted conditions. The colon was a specific site of both tissue parasite persistence, delayed transit and dramatic loss of myenteric neurons as revealed by whole-mount immunofluorescence analysis. DCD mice therefore recapitulated key clinical manifestations of human disease. We also exploited dual reporter transgenic parasites to home in on locations of rare chronic infection foci in the colon by ex vivo bioluminescence imaging and then used fluorescence imaging in tissue microdomains to reveal co-localisation of infection and enteric nervous system lesions. This indicates that long-term T. cruzi-host interactions in the colon drive DCD pathogenesis, suggesting that the efficacy of anti-parasitic chemotherapy against chronic disease progression warrants further pre-clinical investigation. Chagas disease (American trypanosomiasis) is caused by the protozoan parasite Trypanosoma cruzi. Chagas disease has two types, the cardiac form and the digestive form; some patients have symptoms of both. How the parasite causes digestive disease is poorly understood. It is known that damage to the gut’s nervous system is an important factor, but it has been unclear exactly where and when this damage occurs during the course of an infection and also why only a subset of infected people suffer from this outcome. We studied infections in mice and found certain combinations of strains of parasites and mice that exhibited symptoms similar to human digestive Chagas patients, including a problem with peristalsis that localised specifically to the colon. Using parasites that were genetically engineered to emit both bioluminescent and fluorescent light, we tracked infections over time and were able to analyse rare infected cells deep within the muscle tissue of the wall of the colon. We found evidence of damaged neurons in the same location as these infection foci over 6 months after initial infection. Our results show that digestive Chagas disease probably develops as a result of chronic infection and inflammation, which potentially changes approaches to treatment.
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Affiliation(s)
- Archie A. Khan
- Department of Infection Biology, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Harry C. Langston
- Department of Infection Biology, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Fernanda C. Costa
- Department of Infection Biology, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Francisco Olmo
- Department of Infection Biology, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Martin C. Taylor
- Department of Infection Biology, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Conor J. McCann
- Stem Cells and Regenerative Medicine, University College London, Institute of Child Health, London, United Kingdom
| | - John M. Kelly
- Department of Infection Biology, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Michael D. Lewis
- Department of Infection Biology, London School of Hygiene and Tropical Medicine, London, United Kingdom
- * E-mail:
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Nicoletti F, Hammer L, Furtado S, Mangano K, Mathiowitz E, Green B, Auci DL. Oral Delivery of Encapsulated All-Trans Retinoic Acid Ameliorates Disease in Rodent Models of Colitis. Inflamm Bowel Dis 2021; 28:455-465. [PMID: 34417826 PMCID: PMC8889276 DOI: 10.1093/ibd/izab204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Indexed: 12/09/2022]
Abstract
BACKGROUND All-trans retinoic acid (ATRA) is a biologically active isomer of retinoic acid (RA). Topical ATRA (retin-a, retin-a micro, atralin, renova, and avita) is the active pharmaceutical ingredient for FDA-approved treatments for acne and skin wrinkles. Oral formulations (Vesanoid) treat acute promyelocytic leukemia, but oral dosing can induce severe side effects. Despite benefits in various rodent models of inflammatory bowel disease (IBD), toxicity and controversial clinical observations have diminished enthusiasm for ATRA IBD clinical trials. To circumvent these issues and to use ATRA's key role in maintaining gut tolerance, we developed a poly(lactic-co-glycolic acid) (PLGA) microsphere (MS) encapsulated ATRA formulation aimed at directing ATRA delivery to immune structures of the gut, limiting systemic exposure. Initially, ATRA MS was developed as a component of a combinatorial product (TreXTAM) that also contained encapsulated transforming growth factor (TGF)-β and ATRA in a 1:2 w/w ratio. Although the combination was optimal, benefit was also observed when ATRA MS was given alone in the CD4+ CD25-T-cell adoptive transfer (ACT) colitis model. METHODS We used the ACT and DSS-induced murine models of colitis to expand on the dose-dependent effects of oral ATRA MS when given alone. The DSS model was also used to compare the efficacy of ATRA MS and soluble ATRA, while healthy animals were used to compare the pharmacokinetics of the two drugs. RESULTS In both the ACT and DSS-induced murine models of colitis, ATRA MS was observed to be effective in ameliorating disease. ATRA MS was also observed to be more effective than soluble ATRA in these models and displayed more favorable pharmacokinetics. CONCLUSIONS We suggest ATRA MS, as a standalone product, may attenuate IBD and perhaps limit fibrosis, while limiting systemic side effects.
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Affiliation(s)
| | | | | | | | | | | | - Dominick L Auci
- Therapyx, Inc., Louisville, Kentucky, USA,Address correspondence to: Dominick L. Auci, PhD, Vice President, Research and Development, Therapyx, Inc., 2010 Cherokee Pkwy, Suite 2, Louisville, KY 40204, USA ()
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Sauvaitre T, Etienne-Mesmin L, Sivignon A, Mosoni P, Courtin CM, Van de Wiele T, Blanquet-Diot S. Tripartite relationship between gut microbiota, intestinal mucus and dietary fibers: towards preventive strategies against enteric infections. FEMS Microbiol Rev 2021; 45:5918835. [PMID: 33026073 DOI: 10.1093/femsre/fuaa052] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 10/05/2020] [Indexed: 02/06/2023] Open
Abstract
The human gut is inhabited by a large variety of microorganims involved in many physiological processes and collectively referred as to gut microbiota. Disrupted microbiome has been associated with negative health outcomes and especially could promote the onset of enteric infections. To sustain their growth and persistence within the human digestive tract, gut microbes and enteric pathogens rely on two main polysaccharide compartments, namely dietary fibers and mucus carbohydrates. Several evidences suggest that the three-way relationship between gut microbiota, dietary fibers and mucus layer could unravel the capacity of enteric pathogens to colonise the human digestive tract and ultimately lead to infection. The review starts by shedding light on similarities and differences between dietary fibers and mucus carbohydrates structures and functions. Next, we provide an overview of the interactions of these two components with the third partner, namely, the gut microbiota, under health and disease situations. The review will then provide insights into the relevance of using dietary fibers interventions to prevent enteric infections with a focus on gut microbial imbalance and impaired-mucus integrity. Facing the numerous challenges in studying microbiota-pathogen-dietary fiber-mucus interactions, we lastly describe the characteristics and potentialities of currently available in vitro models of the human gut.
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Affiliation(s)
- Thomas Sauvaitre
- Université Clermont Auvergne, UMR 454 INRAe, Microbiology, Digestive Environment and Health (MEDIS), Clermont-Ferrand, France.,Ghent University, Faculty of Bioscience Engineering, Center for Microbial Ecology and Technology (CMET), Ghent, Belgium
| | - Lucie Etienne-Mesmin
- Université Clermont Auvergne, UMR 454 INRAe, Microbiology, Digestive Environment and Health (MEDIS), Clermont-Ferrand, France
| | - Adeline Sivignon
- Université Clermont Auvergne, UMR 1071 Inserm, USC-INRAe 2018, Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), Clermont-Ferrand, France
| | - Pascale Mosoni
- Université Clermont Auvergne, UMR 454 INRAe, Microbiology, Digestive Environment and Health (MEDIS), Clermont-Ferrand, France
| | - Christophe M Courtin
- KU Leuven, Faculty of Bioscience Engineering, Laboratory of Food Chemistry and Biochemistry & Leuven Food Science and Nutrition Research Centre (LFoRCe), Leuven, Belgium
| | - Tom Van de Wiele
- Ghent University, Faculty of Bioscience Engineering, Center for Microbial Ecology and Technology (CMET), Ghent, Belgium
| | - Stéphanie Blanquet-Diot
- Université Clermont Auvergne, UMR 454 INRAe, Microbiology, Digestive Environment and Health (MEDIS), Clermont-Ferrand, France
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Fournier E, Etienne-Mesmin L, Grootaert C, Jelsbak L, Syberg K, Blanquet-Diot S, Mercier-Bonin M. Microplastics in the human digestive environment: A focus on the potential and challenges facing in vitro gut model development. JOURNAL OF HAZARDOUS MATERIALS 2021; 415:125632. [PMID: 33770682 DOI: 10.1016/j.jhazmat.2021.125632] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 03/05/2021] [Accepted: 03/07/2021] [Indexed: 05/02/2023]
Abstract
Plastic pollution is a major issue worldwide, generating massive amounts of smaller plastic particles, including microplastics (MPs). Their ubiquitous nature in the environment but also in foodstuff and consumer packaged goods has revealed potential threats to humans who can be contaminated mainly through air, food and water consumption. In this review, the current literature on human exposure to MPs is summarized with a focus on the gastrointestinal tract as portal of entry. Then, we discuss the vector effect of MPs, in their pristine versus weathered forms, with well-known contaminants as heavy metals and chemicals, or more emerging ones as antibiotics or microbial pathogens, like Pseudomonas spp., Vibrio spp., Campylobacter spp. and Escherichia coli. Comprehensive knowledge on MP fate in the gastrointestinal tract and their potential impact on gut homeostasis disruption, including gut microbiota, mucus and epithelial barrier, is reported in vitro and in vivo in mammals. Special emphasis is given on the crucial need of developing robust in vitro gut models to adequately simulate human digestive physiology and absorption processes. Finally, this review points out future research directions on MPs in human intestinal health.
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Affiliation(s)
- Elora Fournier
- Université Clermont Auvergne, INRAE, MEDIS (Microbiology, Digestive Environment and Health), 28 Place Henri Dunant, 63000 Clermont-Ferrand, France; Toxalim (Research Center in Food Toxicology), Université de Toulouse, INRAE, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Lucie Etienne-Mesmin
- Université Clermont Auvergne, INRAE, MEDIS (Microbiology, Digestive Environment and Health), 28 Place Henri Dunant, 63000 Clermont-Ferrand, France
| | - Charlotte Grootaert
- Department of Food technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Ghent 9000, Belgium
| | - Lotte Jelsbak
- Department of Science and Environment, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark
| | - Kristian Syberg
- Department of Science and Environment, Roskilde University, Universitetsvej 1, DK-4000 Roskilde, Denmark
| | - Stéphanie Blanquet-Diot
- Université Clermont Auvergne, INRAE, MEDIS (Microbiology, Digestive Environment and Health), 28 Place Henri Dunant, 63000 Clermont-Ferrand, France
| | - Muriel Mercier-Bonin
- Toxalim (Research Center in Food Toxicology), Université de Toulouse, INRAE, ENVT, INP-Purpan, UPS, Toulouse, France.
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Hartwig O, Shetab Boushehri MA, Shalaby KS, Loretz B, Lamprecht A, Lehr CM. Drug delivery to the inflamed intestinal mucosa - targeting technologies and human cell culture models for better therapies of IBD. Adv Drug Deliv Rev 2021; 175:113828. [PMID: 34157320 DOI: 10.1016/j.addr.2021.113828] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 06/09/2021] [Accepted: 06/10/2021] [Indexed: 12/19/2022]
Abstract
Current treatment strategies for inflammatory bowel disease (IBD) seek to alleviate the undesirable symptoms of the disorder. Despite the higher specificity of newer generation therapeutics, e.g. monoclonal antibodies, adverse effects still arise from their interference with non-specific systemic immune cascades. To circumvent such undesirable effects, both conventional and newer therapeutic options can benefit from various targeting strategies. Of course, both the development and the assessment of the efficiency of such targeted delivery systems necessitate the use of suitable in vivo and in vitro models representing relevant pathophysiological manifestations of the disorder. Accordingly, the current review seeks to provide a comprehensive discussion of the available preclinical models with emphasis on human in vitro models of IBD, along with their potentials and limitations. This is followed by an elaboration on the advancements in the field of biology- and nanotechnology-based targeted drug delivery systems and the potential rooms for improvement to facilitate their clinical translation.
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Affiliation(s)
- Olga Hartwig
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) - Helmholtz Centre for Infection Research (HZI), D-66123 Saarbrücken, Germany; Department of Pharmacy, Saarland University, D-66123 Saarbrücken, Germany
| | | | - Karim S Shalaby
- Department of Pharmaceutics, University of Bonn, D-53121 Bonn, Germany; Department of Pharmaceutics and Industrial Pharmacy, Ain Shams University, Cairo, Egypt
| | - Brigitta Loretz
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) - Helmholtz Centre for Infection Research (HZI), D-66123 Saarbrücken, Germany
| | - Alf Lamprecht
- Department of Pharmaceutics, University of Bonn, D-53121 Bonn, Germany.
| | - Claus-Michael Lehr
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) - Helmholtz Centre for Infection Research (HZI), D-66123 Saarbrücken, Germany; Department of Pharmacy, Saarland University, D-66123 Saarbrücken, Germany.
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Perez L, Scarcello E, Ibouraadaten S, Yakoub Y, Leinardi R, Ambroise J, Bearzatto B, Gala JL, Paquot A, Muccioli GG, Bouzin C, van den Brule S, Lison D. Dietary nanoparticles alter the composition and function of the gut microbiota in mice at dose levels relevant for human exposure. Food Chem Toxicol 2021; 154:112352. [PMID: 34153347 DOI: 10.1016/j.fct.2021.112352] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/02/2021] [Accepted: 06/12/2021] [Indexed: 12/24/2022]
Abstract
BACKGROUND Nanotechnologies provide new opportunities for improving the safety, quality, shelf life, flavor and appearance of foods. The most common nanoparticles (NPs) in human diet are silver metal, mainly present in food packaging and appliances, and silicon and titanium dioxides used as additives. The rapid development and commercialization of consumer products containing these engineered NPs is, however, not well supported by appropriate toxicological studies and risk assessment. Local and systemic toxicity and/or disruption of the gut microbiota (GM) have already been observed after oral administration of NPs in experimental animals, but results are not consistent and doses used were often much higher than the estimated human intakes. In view of the strong evidence linking alterations of the GM to cardiometabolic (CM) diseases, we hypothesized that dietary NPs might disturb this GM-CM axis. MATERIALS AND METHODS We exposed male C57BL/6JRj mice (n = 13 per dose group) to dietary NPs mixed in food pellets at doses relevant for human exposure: Ag (0, 4, 40 or 400 μg/kg pellet), SiO2 (0, 0.8, 8 and 80 mg/kg pellet) or TiO2 (0, 0.4, 4 or 40 mg/kg pellet). After 24 weeks of exposure, we assessed effects on the GM and CM health (n = 8 per dose group). The reversibility of the effects was examined after 8 additional weeks without NPs exposure (recovery period, n ≤ 5 per dose group). RESULTS No overt toxicity was recorded. The GM β-diversity was dose-dependently disrupted by the three NPs, and the bacterial short chain fatty acids (SCFAs) were dose-dependently reduced after the administration of SiO2 and TiO2 NPs. These effects disappeared completely or partly after the recovery period, strengthening the association with dietary NPs. We did not observe atheromatous disease or glucose intolerance after NP exposure. Instead, dose-dependent decreases in the expression of IL-6 in the liver, circulating triglycerides (TG) and urea nitrogen (BUN) were recorded after administration of the NPs. CONCLUSION We found that long-term oral exposure to dietary NPs at doses relevant for estimated human intakes disrupts the GM composition and function. These modifications did not appear associated with atheromatous or deleterious metabolic outcomes.
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Affiliation(s)
- Laeticia Perez
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Louvain centre for Toxicology and Applied Pharmacology, Avenue Hippocrate 57, 1200, Brussels, Belgium.
| | - Eleonora Scarcello
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Louvain centre for Toxicology and Applied Pharmacology, Avenue Hippocrate 57, 1200, Brussels, Belgium
| | - Saloua Ibouraadaten
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Louvain centre for Toxicology and Applied Pharmacology, Avenue Hippocrate 57, 1200, Brussels, Belgium
| | - Yousof Yakoub
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Louvain centre for Toxicology and Applied Pharmacology, Avenue Hippocrate 57, 1200, Brussels, Belgium
| | - Riccardo Leinardi
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Louvain centre for Toxicology and Applied Pharmacology, Avenue Hippocrate 57, 1200, Brussels, Belgium
| | - Jérôme Ambroise
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Centre de Technologies Moléculaires Appliquées, Clos Chapelle-aux-champs 30, 1200, Brussels, Belgium
| | - Bertrand Bearzatto
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Centre de Technologies Moléculaires Appliquées, Clos Chapelle-aux-champs 30, 1200, Brussels, Belgium
| | - Jean-Luc Gala
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Centre de Technologies Moléculaires Appliquées, Clos Chapelle-aux-champs 30, 1200, Brussels, Belgium
| | - Adrien Paquot
- Université catholique de Louvain, Louvain Drug Research Institute, Bioanalysis and Pharmacology of Bioactive Lipids Research Group, Avenue Mounier 73, B1.72.01, 1200, Brussels, Belgium
| | - Giulio G Muccioli
- Université catholique de Louvain, Louvain Drug Research Institute, Bioanalysis and Pharmacology of Bioactive Lipids Research Group, Avenue Mounier 73, B1.72.01, 1200, Brussels, Belgium
| | - Caroline Bouzin
- IREC Imaging Platform (2IP), Institut de Recherche Expérimentale et Clinique, UCLouvain, Brussels, Belgium
| | - Sybille van den Brule
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Louvain centre for Toxicology and Applied Pharmacology, Avenue Hippocrate 57, 1200, Brussels, Belgium
| | - Dominique Lison
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Louvain centre for Toxicology and Applied Pharmacology, Avenue Hippocrate 57, 1200, Brussels, Belgium.
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Kumari R, Palaniyandi S, Hildebrandt GC. The microbiome-the revealing of a long time unbeknownst factor for outcome in murine models of graft-versus-host disease. Bone Marrow Transplant 2021; 56:1777-1783. [PMID: 34052837 DOI: 10.1038/s41409-021-01325-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 04/13/2021] [Accepted: 04/21/2021] [Indexed: 02/04/2023]
Affiliation(s)
- Reena Kumari
- Division of Hematology & Blood and Marrow Transplantation, Markey Cancer Center, University of Kentucky, Lexington, KY, USA
| | - Senthilnathan Palaniyandi
- Division of Hematology & Blood and Marrow Transplantation, Markey Cancer Center, University of Kentucky, Lexington, KY, USA
| | - Gerhard Carl Hildebrandt
- Division of Hematology & Blood and Marrow Transplantation, Markey Cancer Center, University of Kentucky, Lexington, KY, USA.
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175
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Scavizzi F, Bassi C, Lupini L, Guerriero P, Raspa M, Sabbioni S. A comprehensive approach for microbiota and health monitoring in mouse colonies using metagenomic shotgun sequencing. Anim Microbiome 2021; 3:53. [PMID: 34325744 PMCID: PMC8323313 DOI: 10.1186/s42523-021-00113-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 07/16/2021] [Indexed: 01/13/2023] Open
Abstract
Background Health surveillance of murine colonies employed for scientific purposes aim at detecting unwanted infection that can affect the well-being of animals and personnel, and potentially undermine scientific results. In this study, we investigated the use of a next-generation sequencing (NGS) metagenomic approach for monitoring the microbiota composition and uncovering the possible presence of pathogens in mice housed in specific pathogen-free (SPF) or conventional (non-SPF) facilities.
Results Analysis of metagenomic NGS assay through public and free algorithms and databases allowed to precisely assess the composition of mouse gut microbiome and quantify the contribution of the different microorganisms at the species level. Sequence analysis allowed the uncovering of pathogens or the presence of imbalances in the microbiota composition. In several cases, fecal pellets taken from conventional facilities were found to carry gene sequences from bacterial pathogens (Helicobacter hepaticus, Helicobacter typhlonius, Chlamydia muridarum, Streptococcus pyogenes, Rodentibacter pneumotropicus, Citrobacter rodentium, Staphylococcus aureus), intestinal protozoa (Entamoeba muris, Tritrichomonas muris, Spironucleus muris) nematoda (Aspiculuris tetraptera, Syphacia obvelata), eukaryotic parasites (Myocoptes musculinus) and RNA virus (Norwalk virus). Thus, the use of NGS metagenomics can reduce the number of tests required for the detection of pathogens and avoid the use of sentinel mice. Conclusions In summary, in comparison with standard approaches, which require multiple types of test, NGS assay can detect bacteria, fungi, DNA and RNA viruses, and eukaryotic parasites from fecal pellets in a single test. Considering the need to protect animal well-being and to improve the success and reproducibility of preclinical studies, this work provides the proof-of-concept that the use of NGS metagenomics for health monitoring of laboratory mice is a feasible and dependable approach, that is able to broaden the current concept of health monitoring of laboratory mice from “pathogen surveillance” to a more inclusive “microbiota surveillance”. Supplementary Information The online version contains supplementary material available at 10.1186/s42523-021-00113-4.
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Affiliation(s)
- Ferdinando Scavizzi
- National Research Council (IBBC), CNR-Campus International Development, (EMMA-INFRAFRONTIER- IMPC), Monterotondo Scalo, Italy
| | - Cristian Bassi
- Department of Morphology, Surgery and Experimental Medicine, University of Ferrara, 44121, Ferrara, Italy.,Laboratorio Per Le Tecnologie Delle Terapie Avanzate (LTTA), University of Ferrara, 44121, Ferrara, Italy
| | - Laura Lupini
- Department of Morphology, Surgery and Experimental Medicine, University of Ferrara, 44121, Ferrara, Italy
| | - Paola Guerriero
- Department of Morphology, Surgery and Experimental Medicine, University of Ferrara, 44121, Ferrara, Italy
| | - Marcello Raspa
- National Research Council (IBBC), CNR-Campus International Development, (EMMA-INFRAFRONTIER- IMPC), Monterotondo Scalo, Italy
| | - Silvia Sabbioni
- Laboratorio Per Le Tecnologie Delle Terapie Avanzate (LTTA), University of Ferrara, 44121, Ferrara, Italy. .,Department of Life Science and Biotechnology, University of Ferrara, Via Luigi Borsari 46, 44121, Ferrara, Italy.
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176
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Packialakshmi B, Stewart IJ, Burmeister DM, Chung KK, Zhou X. Large animal models for translational research in acute kidney injury. Ren Fail 2021; 42:1042-1058. [PMID: 33043785 PMCID: PMC7586719 DOI: 10.1080/0886022x.2020.1830108] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
While extensive research using animal models has improved the understanding of acute kidney injury (AKI), this knowledge has not been translated into effective treatments. Many promising interventions for AKI identified in mice and rats have not been validated in subsequent clinical trials. As a result, the mortality rate of AKI patients remains high. Inflammation plays a fundamental role in the pathogenesis of AKI, and one reason for the failure to translate promising therapeutics may lie in the profound difference between the immune systems of rodents and humans. The immune systems of large animals such as swine, nonhuman primates, sheep, dogs and cats, more closely resemble the human immune system. Therefore, in the absence of a basic understanding of the pathophysiology of human AKI, large animals are attractive models to test novel interventions. However, there is a lack of reviews on large animal models for AKI in the literature. In this review, we will first highlight differences in innate and adaptive immunities among rodents, large animals, and humans in relation to AKI. After illustrating the potential merits of large animals in testing therapies for AKI, we will summarize the current state of the evidence in terms of what therapeutics have been tested in large animal models. The aim of this review is not to suggest that murine models are not valid to study AKI. Instead, our objective is to demonstrate that large animal models can serve as valuable and complementary tools in translating potential therapeutics into clinical practice.
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Affiliation(s)
| | - Ian J Stewart
- Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - David M Burmeister
- Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Kevin K Chung
- Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Xiaoming Zhou
- Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
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Wolff NS, Jacobs MC, Wiersinga WJ, Hugenholtz F. Pulmonary and intestinal microbiota dynamics during Gram-negative pneumonia-derived sepsis. Intensive Care Med Exp 2021; 9:35. [PMID: 34250564 PMCID: PMC8272965 DOI: 10.1186/s40635-021-00398-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 06/01/2021] [Indexed: 12/27/2022] Open
Abstract
Background The gut microbiome plays a protective role in the host defense against pneumonia. The composition of the lung microbiota has been shown to be predictive of clinical outcome in critically ill patients. However, the dynamics of the lung and gut microbiota composition over time during severe pneumonia remains ill defined. We used a mouse model of pneumonia-derived sepsis caused by Klebsiella pneumoniae in order to follow the pathogen burden as well as the composition of the lung, tongue and fecal microbiota from local infection towards systemic spread. Results Already at 6 h post-inoculation with K. pneumoniae, marked changes in the lung microbiota were seen. The alpha diversity of the lung microbiota did not change throughout the infection, whereas the beta diversity did. A shift between the prominent lung microbiota members of Streptococcus and Klebsiella was seen from 12 h onwards and was most pronounced at 18 h post-inoculation (PI) which was also reflected in the release of pro-inflammatory cytokines indicating severe pulmonary inflammation. Around 18 h PI, K. pneumoniae bacteremia was observed together with a systemic inflammatory response. The composition of the tongue microbiota was not affected during infection, even at 18–30 h PI when K. pneumoniae had become the dominant bacterium in the lung. Moreover, we observed differences in the gut microbiota during pulmonary infection. The gut microbiota contributed to the lung microbiota at 12 h PI, however, this decreased at a later stage of the infection. Conclusions At 18 h PI, K. pneumoniae was the dominant member in the lung microbiota. The lung microbiota profiles were significantly explained by the lung K. pneumoniae bacterial counts and Klebsiella and Streptococcus were correlating with the measured cytokine levels in the lung and/or blood. The oral microbiota in mice, however, was not influenced by the severity of murine pneumonia, whereas the gut microbiota was affected. This study is of significance for future studies investigating the role of the lung microbiota during pneumonia and sepsis. Supplementary Information The online version contains supplementary material available at 10.1186/s40635-021-00398-4.
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Affiliation(s)
- Nora S Wolff
- Center for Experimental and Molecular Medicine, Amsterdam Infection & Immunity Institute, Amsterdam UMC, Location AMC, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Max C Jacobs
- Center for Experimental and Molecular Medicine, Amsterdam Infection & Immunity Institute, Amsterdam UMC, Location AMC, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - W Joost Wiersinga
- Center for Experimental and Molecular Medicine, Amsterdam Infection & Immunity Institute, Amsterdam UMC, Location AMC, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands. .,Department of Medicine, Division of Infectious Diseases, Amsterdam UMC, Location AMC, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.
| | - Floor Hugenholtz
- Center for Experimental and Molecular Medicine, Amsterdam Infection & Immunity Institute, Amsterdam UMC, Location AMC, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
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178
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Fournier E, Roussel C, Dominicis A, Ley D, Peyron MA, Collado V, Mercier-Bonin M, Lacroix C, Alric M, Van de Wiele T, Chassard C, Etienne-Mesmin L, Blanquet-Diot S. In vitro models of gut digestion across childhood: current developments, challenges and future trends. Biotechnol Adv 2021; 54:107796. [PMID: 34252564 DOI: 10.1016/j.biotechadv.2021.107796] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 07/05/2021] [Accepted: 07/06/2021] [Indexed: 02/08/2023]
Abstract
The human digestion is a multi-step and multi-compartment process essential for human health, at the heart of many issues raised by academics, the medical world and industrials from the food, nutrition and pharma fields. In the first years of life, major dietary changes occur and are concomitant with an evolution of the whole child digestive tract anatomy and physiology, including colonization of gut microbiota. All these phenomena are influenced by child exposure to environmental compounds, such as drugs (especially antibiotics) and food pollutants, but also childhood infections. Due to obvious ethical, regulatory and technical limitations, in vivo approaches in animal and human are more and more restricted to favor complementary in vitro approaches. This review summarizes current knowledge on the evolution of child gut physiology from birth to 3 years old regarding physicochemical, mechanical and microbial parameters. Then, all the available in vitro models of the child digestive tract are described, ranging from the simplest static mono-compartmental systems to the most sophisticated dynamic and multi-compartmental models, and mimicking from the oral phase to the colon compartment. Lastly, we detail the main applications of child gut models in nutritional, pharmaceutical and microbiological studies and discuss the limitations and challenges facing this field of research.
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Affiliation(s)
- Elora Fournier
- Université Clermont Auvergne, INRAE, UMR 454 MEDIS, Microbiologie Environnement Digestif et Santé, CRNH Auvergne, 63000 Clermont-Ferrand, France; Toxalim, Research Centre in Food Toxicology, INRAE, ENVT, INP-Purpan, UPS, Université de Toulouse, 31000 Toulouse, France
| | - Charlène Roussel
- Laval University, INAF Institute of Nutrition and Functional Foods, G1V 0A6 Quebec, Canada
| | - Alessandra Dominicis
- European Reference Laboratory for E. coli, Istituto Superiore di Sanità, Rome, Italy
| | - Delphine Ley
- Université Lille 2, Faculté de Médecine, Inserm U995 Nutritional Modulation of Infection and Inflammation, 59045 Lille, France
| | - Marie-Agnès Peyron
- Université Clermont Auvergne, INRAE, UNH, Unité de Nutrition Humaine, CRNH Auvergne, 63000 Clermont-Ferrand, France
| | - Valérie Collado
- Université Clermont Auvergne, EA 4847, CROC, Centre de Recherche en Odontologie Clinique, 63000 Clermont-Ferrand, France
| | - Muriel Mercier-Bonin
- Toxalim, Research Centre in Food Toxicology, INRAE, ENVT, INP-Purpan, UPS, Université de Toulouse, 31000 Toulouse, France
| | - Christophe Lacroix
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, ETH Zurich, 8092 Zürich, Switzerland
| | - Monique Alric
- Université Clermont Auvergne, INRAE, UMR 454 MEDIS, Microbiologie Environnement Digestif et Santé, CRNH Auvergne, 63000 Clermont-Ferrand, France
| | - Tom Van de Wiele
- Ghent University, Center for Microbial Ecology and Technology (CMET), Coupure Links 653, 9000 Ghent, Belgium
| | - Christophe Chassard
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMRF, 15000 Aurillac, France
| | - Lucie Etienne-Mesmin
- Université Clermont Auvergne, INRAE, UMR 454 MEDIS, Microbiologie Environnement Digestif et Santé, CRNH Auvergne, 63000 Clermont-Ferrand, France
| | - Stéphanie Blanquet-Diot
- Université Clermont Auvergne, INRAE, UMR 454 MEDIS, Microbiologie Environnement Digestif et Santé, CRNH Auvergne, 63000 Clermont-Ferrand, France.
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179
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Glucuronides Hydrolysis by Intestinal Microbial β-Glucuronidases (GUS) Is Affected by Sampling, Enzyme Preparation, Buffer pH, and Species. Pharmaceutics 2021; 13:pharmaceutics13071043. [PMID: 34371734 PMCID: PMC8309147 DOI: 10.3390/pharmaceutics13071043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 07/03/2021] [Accepted: 07/06/2021] [Indexed: 01/02/2023] Open
Abstract
Glucuronides hydrolysis by intestinal microbial β-Glucuronidases (GUS) is an important procedure for many endogenous and exogenous compounds. The purpose of this study is to determine the impact of experimental conditions on glucuronide hydrolysis by intestinal microbial GUS. Standard probe 4-Nitrophenyl β-D-glucopyranoside (pNPG) and a natural glucuronide wogonoside were used as the model compounds. Feces collection time, buffer conditions, interindividual, and species variations were evaluated by incubating the substrates with enzymes. The relative reaction activity of pNPG, reaction rates, and reaction kinetics for wogonoside were calculated. Fresh feces showed the highest hydrolysis activities. Sonication increased total protein yield during enzyme preparation. The pH of the reaction system increased the activity in 0.69–1.32-fold, 2.9–12.9-fold, and 0.28–1.56-fold for mouse, rat, and human at three different concentrations of wogonoside, respectively. The Vmax for wogonoside hydrolysis was 2.37 ± 0.06, 4.48 ± 0.11, and 5.17 ± 0.16 μmol/min/mg and Km was 6.51 ± 0.71, 3.04 ± 0.34, and 0.34 ± 0.047 μM for mouse, rat, and human, respectively. The inter-individual difference was significant (4–6-fold) using inbred rats as the model animal. Fresh feces should be used to avoid activity loss and sonication should be utilized in enzyme preparation to increase hydrolysis activity. The buffer pH should be appropriate according to the species. Inter-individual and species variations were significant.
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180
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Liu X, Yang Y, Inda ME, Lin S, Wu J, Kim Y, Chen X, Ma D, Lu TK, Zhao X. Magnetic Living Hydrogels for Intestinal Localization, Retention, and Diagnosis. ADVANCED FUNCTIONAL MATERIALS 2021; 31:2010918. [PMID: 35903441 PMCID: PMC9328153 DOI: 10.1002/adfm.202010918] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
Natural microbial sensing circuits can be rewired into new gene networks to build living sensors that detect and respond to disease-associated biomolecules. However, synthetic living sensors, once ingested, are cleared from the gastrointestinal (GI) tract within 48 hours; retaining devices in the intestinal lumen is prone to intestinal blockage or device migration. To localize synthetic microbes and safely extend their residence in the GI tract for health monitoring and sustained drug release, an ingestible magnetic hydrogel carrier is developed to transport diagnostic microbes to specific intestinal sites. The magnetic living hydrogel is localized and retained by attaching a magnet to the abdominal skin, resisting the peristaltic waves in the intestine. The device retention is validated in a human intestinal phantom and an in vivo rodent model, showing that the ingestible hydrogel maintains the integrated living bacteria for up to seven days, which allows the detection of heme for GI bleeding in the harsh environment of the gut. The retention of microelectronics is also demonstrated by incorporating a temperature sensor into the magnetic hydrogel carrier.
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Affiliation(s)
- Xinyue Liu
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Yueying Yang
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Maria Eugenia Inda
- Synthetic Biology Group, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Shaoting Lin
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Jingjing Wu
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Yoonho Kim
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Xiaoyu Chen
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Dacheng Ma
- Synthetic Biology Group, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Timothy K Lu
- Synthetic Biology Group, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Xuanhe Zhao
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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Bancil AS, Sandall AM, Rossi M, Chassaing B, Lindsay JO, Whelan K. Food Additive Emulsifiers and Their Impact on Gut Microbiome, Permeability, and Inflammation: Mechanistic Insights in Inflammatory Bowel Disease. J Crohns Colitis 2021; 15:1068-1079. [PMID: 33336247 DOI: 10.1093/ecco-jcc/jjaa254] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The global burden of inflammatory bowel disease [IBD] has increased over the 21st century. Despite multiple studies investigating the pathogenesis of IBD, the causative mechanisms pertaining to its increased prevalence remain unclear. There is growing evidence that aspects of a 'Western diet' increase the risk of developing IBD. More recently, evidence implicating dietary emulsifiers has accumulated, with ecological studies showing a positive correlation between inflammatory bowel disease and emulsifier consumption. Further to these, cell and animal studies have demonstrated plausible mechanisms by which dietary emulsifiers may contribute to IBD pathogenesis through mechanisms including: promotion of pro-inflammatory intestinal microbiota; disruption of mucus architecture; increased intestinal permeability; activation of inflammatory pathways; and disruption of the cell cycle. This review critically analyses the current evidence for these mechanisms that may be of pathological relevance to IBD, evaluates recent dietary trials, acknowledges the challenges of dietary intervention studies, and gives an overview of ongoing and future clinical trials in this important area.
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Affiliation(s)
- Aaron S Bancil
- King's College London, Department of Nutritional Sciences, London, UK
| | - Alicia M Sandall
- King's College London, Department of Nutritional Sciences, London, UK
| | - Megan Rossi
- King's College London, Department of Nutritional Sciences, London, UK
| | - Benoit Chassaing
- INSERM U1016, CNRS UMR 8104, Université de Paris, Paris, France.,Neuroscience Institute, Georgia State University, Atlanta, GA, USA.,Institute for Biomedical Sciences, Center for Inflammation, Immunity and Infection, Georgia State University, Atlanta, GA, USA
| | - James O Lindsay
- Queen Mary University of London, Blizard Institute, Barts and the London School of Medicine, London, UK
| | - Kevin Whelan
- King's College London, Department of Nutritional Sciences, London, UK
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Bastiaanssen TFS, Cussotto S, Claesson MJ, Clarke G, Dinan TG, Cryan JF. Gutted! Unraveling the Role of the Microbiome in Major Depressive Disorder. Harv Rev Psychiatry 2021; 28:26-39. [PMID: 31913980 PMCID: PMC7012351 DOI: 10.1097/hrp.0000000000000243] [Citation(s) in RCA: 82] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Microorganisms can be found in virtually any environment. In humans, the largest collection of microorganisms is found in the gut ecosystem. The adult gut microbiome consists of more genes than its human host and typically spans more than 60 genera from across the taxonomic tree. In addition, the gut contains the largest number of neurons in the body, after the brain. In recent years, it has become clear that the gut microbiome is in communication with the brain, through the gut-brain axis. A growing body of literature shows that the gut microbiome plays a shaping role in a variety of psychiatric disorders, including major depressive disorder (MDD). In this review, the interplay between the microbiome and MDD is discussed in three facets. First, we discuss factors that affect the onset/development of MDD that also greatly impinge on the composition of the gut microbiota-especially diet and stressful life events. We then examine the interplay between the microbiota and MDD. We examine evidence suggesting that the microbiota is altered in MDD, and we discuss why the microbiota should be considered during MDD treatment. Finally, we look toward the future and examine how the microbiota might become a therapeutic target for MDD. This review is intended to introduce those familiar with the neurological and psychiatric aspects of MDD to the microbiome and its potential role in the disorder. Although research is in its very early days, with much yet to be the understood, the microbiome is offering new avenues for developing potentially novel strategies for managing MDD.
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183
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Selective estrogen receptor modulator lasofoxifene suppresses spondyloarthritis manifestation and affects characteristics of gut microbiota in zymosan-induced SKG mice. Sci Rep 2021; 11:11923. [PMID: 34099783 PMCID: PMC8184804 DOI: 10.1038/s41598-021-91320-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 05/07/2021] [Indexed: 12/22/2022] Open
Abstract
Ankylosing spondylitis is a male-predominant disease and previous study revealed that estrogens have an anti-inflammatory effect on the spondyloarthritis (SpA) manifestations in zymosan-induced SKG mice. This study aimed to evaluate the effect of selective estrogen receptor modulator (SERM) lasofoxifene (Laso) on disease activity of SpA. Mice were randomized into zymosan-treated, zymosan + 17β-estradiol (E2)-treated, and zymosan + Laso-treated groups. Arthritis was assessed by 18F-fluorodeoxyglucose (18F-FDG) small-animal positron emission tomography/computed tomography and bone mineral density (BMD) was measured. Fecal samples were collected and 16S ribosomal RNA gene sequencing was used to determine gut microbiota differences. Both zymosan + E2-treated mice and zymosan + Laso-treated mice showed lower arthritis clinical scores and lower 18F-FDG uptake than zymosan-treated mice. BMD was significantly higher in zymosan + E2-treated mice and zymosan + Laso-treated mice than zymosan-treated mice, respectively. Fecal calprotectin levels were significantly elevated at 8 weeks after zymosan injection in zymosan-treated mice, but it was not significantly changed in zymosan + E2-treated mice and zymosan + Laso-treated mice. Gut microbiota diversity of zymosan-treated mice was significantly different from zymosan + E2-treated mice and zymosan + Laso-treated mice, respectively. There was no significant difference in gut microbiota diversity between zymosan + E2-treated mice and zymosan + Laso -treated mice. Laso inhibited joint inflammation and enhanced BMD in SKG mice, a model of SpA. Laso also affected the composition and biodiversity of gut microbiota. This study provides new knowledge regarding that selected SpA patients could benefit from SERM treatment.
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184
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Grifka-Walk HM, Jenkins BR, Kominsky DJ. Amino Acid Trp: The Far Out Impacts of Host and Commensal Tryptophan Metabolism. Front Immunol 2021; 12:653208. [PMID: 34149693 PMCID: PMC8213022 DOI: 10.3389/fimmu.2021.653208] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 05/11/2021] [Indexed: 12/12/2022] Open
Abstract
Tryptophan (Trp) is an essential amino acid primarily derived from the diet for use by the host for protein synthesis. The intestinal tract is lined with cells, both host and microbial, that uptake and metabolize Trp to also generate important signaling molecules. Serotonin (5-HT), kynurenine and its downstream metabolites, and to a lesser extent other neurotransmitters are generated by the host to signal onto host receptors and elicit physiological effects. 5-HT production by neurons in the CNS regulates sleep, mood, and appetite; 5-HT production in the intestinal tract by enterochromaffin cells regulates gastric motility and inflammation in the periphery. Kynurenine can signal onto the aryl hydrocarbon receptor (AHR) to elicit pleiotropic responses from several cell types including epithelial and immune cells, or can be further metabolized into bioactive molecules to influence neurodegenerative disease. There is a remarkable amount of cross-talk with the microbiome with regard to tryptophan metabolites as well. The gut microbiome can regulate the production of host tryptophan metabolites and can use dietary or recycled trp to generate bioactive metabolites themselves. Trp derivatives like indole are able to signal onto xenobiotic receptors, including AHR, to elicit tolerogenic effects. Here, we review studies that demonstrate that tryptophan represents a key intra-kingdom signaling molecule.
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Affiliation(s)
- Heather M Grifka-Walk
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, United States
| | - Brittany R Jenkins
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, United States
| | - Douglas J Kominsky
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, United States
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185
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Low A, Soh M, Miyake S, Aw VZJ, Feng J, Wong A, Seedorf H. Longitudinal Changes in Diet Cause Repeatable and Largely Reversible Shifts in Gut Microbial Communities of Laboratory Mice and Are Observed across Segments of the Entire Intestinal Tract. Int J Mol Sci 2021; 22:5981. [PMID: 34205981 PMCID: PMC8198505 DOI: 10.3390/ijms22115981] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 05/27/2021] [Accepted: 05/27/2021] [Indexed: 01/04/2023] Open
Abstract
Dietary changes are known to alter the composition of the gut microbiome. However, it is less understood how repeatable and reversible these changes are and how diet switches affect the microbiota in the various segments of the gastrointestinal tract. Here, a treatment group of conventionally raised laboratory mice is subjected to two periods of western diet (WD) interrupted by a period of standard diet (SD) of the same duration. Beta-diversity analyses show that diet-induced microbiota changes are largely reversible (q = 0.1501; PERMANOVA, weighted-UniFrac comparison of the treatment-SD group to the control-SD group) and repeatable (q = 0.032; PERMANOVA, weighted-UniFrac comparison of both WD treatments). Furthermore, we report that diet switches alter the gut microbiota composition along the length of the intestinal tract in a segment-specific manner, leading to gut segment-specific Firmicutes/Bacteroidota ratios. We identified prevalent and distinct Amplicon Sequencing Variants (ASVs), particularly in genera of the recently described Muribaculaceae, along the gut as well as ASVs that are differentially abundant between segments of treatment and control groups. Overall, this study provides insights into the reversibility of diet-induced microbiota changes and highlights the importance of expanding sampling efforts beyond the collections of fecal samples to characterize diet-dependent and segment-specific microbiome differences.
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Affiliation(s)
- Adrian Low
- Temasek Life Sciences Laboratory, 1 Research Link, Singapore 117604, Singapore; (A.L.); (M.S.); (S.M.); (V.Z.J.A.); (J.F.); (A.W.)
| | - Melissa Soh
- Temasek Life Sciences Laboratory, 1 Research Link, Singapore 117604, Singapore; (A.L.); (M.S.); (S.M.); (V.Z.J.A.); (J.F.); (A.W.)
| | - Sou Miyake
- Temasek Life Sciences Laboratory, 1 Research Link, Singapore 117604, Singapore; (A.L.); (M.S.); (S.M.); (V.Z.J.A.); (J.F.); (A.W.)
| | - Vanessa Zhi Jie Aw
- Temasek Life Sciences Laboratory, 1 Research Link, Singapore 117604, Singapore; (A.L.); (M.S.); (S.M.); (V.Z.J.A.); (J.F.); (A.W.)
| | - Jian Feng
- Temasek Life Sciences Laboratory, 1 Research Link, Singapore 117604, Singapore; (A.L.); (M.S.); (S.M.); (V.Z.J.A.); (J.F.); (A.W.)
| | - Adeline Wong
- Temasek Life Sciences Laboratory, 1 Research Link, Singapore 117604, Singapore; (A.L.); (M.S.); (S.M.); (V.Z.J.A.); (J.F.); (A.W.)
| | - Henning Seedorf
- Temasek Life Sciences Laboratory, 1 Research Link, Singapore 117604, Singapore; (A.L.); (M.S.); (S.M.); (V.Z.J.A.); (J.F.); (A.W.)
- Department of Biological Sciences, National University of Singapore, Singapore 117604, Singapore
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186
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Renwick S, Ganobis CM, Elder RA, Gianetto-Hill C, Higgins G, Robinson AV, Vancuren SJ, Wilde J, Allen-Vercoe E. Culturing Human Gut Microbiomes in the Laboratory. Annu Rev Microbiol 2021; 75:49-69. [PMID: 34038159 DOI: 10.1146/annurev-micro-031021-084116] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The human gut microbiota is a complex community of prokaryotic and eukaryotic microbes and viral particles that is increasingly associated with many aspects of host physiology and health. However, the classical microbiology approach of axenic culture cannot provide a complete picture of the complex interactions between microbes and their hosts in vivo. As such, recently there has been much interest in the culture of gut microbial ecosystems in the laboratory as a strategy to better understand their compositions and functions. In this review, we discuss the model platforms and methods available in the contemporary microbiology laboratory to study human gut microbiomes, as well as current knowledge surrounding the isolation of human gut microbes for the potential construction of defined communities for use in model systems. Expected final online publication date for the Annual Review of Microbiology, Volume 75 is October 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Simone Renwick
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada; , , , , , , , ,
| | - Caroline M Ganobis
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada; , , , , , , , ,
| | - Riley A Elder
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada; , , , , , , , ,
| | - Connor Gianetto-Hill
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada; , , , , , , , ,
| | - Gregory Higgins
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada; , , , , , , , ,
| | - Avery V Robinson
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada; , , , , , , , ,
| | - Sarah J Vancuren
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada; , , , , , , , ,
| | - Jacob Wilde
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada; , , , , , , , ,
| | - Emma Allen-Vercoe
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada; , , , , , , , ,
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187
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Li R, Mao Z, Ye X, Zuo T. Human Gut Microbiome and Liver Diseases: From Correlation to Causation. Microorganisms 2021; 9:microorganisms9051017. [PMID: 34066850 PMCID: PMC8151257 DOI: 10.3390/microorganisms9051017] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 04/25/2021] [Accepted: 04/30/2021] [Indexed: 02/06/2023] Open
Abstract
The important role of human gut microbiota in liver diseases has long been recognized as dysbiosis and the translocation of certain microbes from the gut to liver. With the development of high-throughput DNA sequencing, the complexity and integrity of the gut microbiome in the whole spectrum of liver diseases is emerging. Specific patterns of gut microbiota have been identified in liver diseases with different causes, including alcoholic, non-alcoholic, and virus induced liver diseases, or even at different stages, ranging from steatohepatitis, fibrosis, cirrhosis, to hepatocellular carcinoma. At the same time, the mechanism of how microbiota contributes to liver diseases goes beyond the traditional function of the gut–liver axis which could lead to liver injury and inflammation. With the application of proteomics, metabolomics, and modern molecular technologies, more microbial metabolites and the complicated interaction of microbiota with host immunity come into our understanding in the liver pathogenesis. Germ-free animal models serve as a workhorse to test the function of microbiota and their derivatives in liver disease models. Here, we review the current evidence on the relationship between gut microbiota and liver diseases, and the mechanisms underlying this phenotype. In addition to original liver diseases, gut microbiota might also affect liver injury in systemic disorders involving multiple organs, as in the case of COVID-19 at a severe state. A better understanding of the gut microbial contribution to liver diseases might help us better benefit from this guest–host relationship and pave the way for novel therapies.
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Affiliation(s)
- Rui Li
- Department of Geriatrics, Zhongnan Hospital of Wuhan University, Wuhan 430070, China;
- Correspondence: (R.L.); (T.Z.); Tel.: +86-13-62-86-35-351 (R.L.); +86-13-24-20-77-365 (T.Z.)
| | - Zhengsheng Mao
- Department of Neurology, Wuhan Fourth Hospital, Puai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430074, China;
| | - Xujun Ye
- Department of Geriatrics, Zhongnan Hospital of Wuhan University, Wuhan 430070, China;
| | - Tao Zuo
- Guangdong Institute of Gastroenterology, The Sixth Affiliated Hospital of Sun Yat-Sen University, Sun Yat-Sen University, Guangzhou 510000, China
- Correspondence: (R.L.); (T.Z.); Tel.: +86-13-62-86-35-351 (R.L.); +86-13-24-20-77-365 (T.Z.)
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188
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Jakobsen LMA, Sundekilde UK, Andersen HJ, Kot W, Mejia JLC, Nielsen DS, Hansen AK, Bertram HC. Administration of Bovine Milk Oligosaccharide to Weaning Gnotobiotic Mice Inoculated with a Simplified Infant Type Microbiota. Microorganisms 2021; 9:microorganisms9051003. [PMID: 34066501 PMCID: PMC8148552 DOI: 10.3390/microorganisms9051003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 04/22/2021] [Accepted: 05/04/2021] [Indexed: 12/18/2022] Open
Abstract
Bovine milk oligosaccharides (BMO) share structural similarity to selected human milk oligosaccharides, which are natural prebiotics for infants. Thus, there is a potential in including BMOs as a prebiotic in infant formula. To examine the in vivo effect of BMO-supplementation on the infant gut microbiota, a BMO-rich diet (2% w/w) was fed to gnotobiotic mice (n = 11) inoculated with an infant type co-culture and compared with gnotobiotic mice receiving a control diet (n = 9). Nuclear magnetic resonance metabolomics in combination with high-throughput 16S rRNA gene amplicon sequencing was used to compare metabolic activity and microbiota composition in different compartments of the lower gastrointestinal tract. BMO components were detected in cecum and colon contents, revealing that BMO was available for the gut bacteria. The gut microbiota was dominated by Enterobacteriaceae and minor abundance of Lactobacilliaceae, while colonization of Bifidobacteriaceae did not succeed. Apart from a lower E. coli population in cecum content and lower formate (in colon) and succinate (in colon and cecum) concentrations, BMO supplementation did not result in significant changes in microbiota composition nor metabolic activity. The present study corroborates the importance of the presence of bifidobacteria for obtaining microbial-derived effects of milk oligosaccharides in the gastrointestinal tract.
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Affiliation(s)
- Louise Margrethe Arildsen Jakobsen
- Department of Food Science, Aarhus University, Agro Food Park 48, 8200 Aarhus N, Denmark; (U.K.S.); (H.C.B.)
- Correspondence: ; Tel.: +45-2073-1316
| | - Ulrik Kræmer Sundekilde
- Department of Food Science, Aarhus University, Agro Food Park 48, 8200 Aarhus N, Denmark; (U.K.S.); (H.C.B.)
| | | | - Witold Kot
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark;
| | - Josue Leonardo Castro Mejia
- Department of Food Science, University of Copenhagen, Rolighedsvej 30, 1958 Frederiksberg C, Denmark; (J.L.C.M.); (D.S.N.)
| | - Dennis Sandris Nielsen
- Department of Food Science, University of Copenhagen, Rolighedsvej 30, 1958 Frederiksberg C, Denmark; (J.L.C.M.); (D.S.N.)
| | - Axel Kornerup Hansen
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Grønnegårdsvej 17, 1870 Frederiksberg C, Denmark;
| | - Hanne Christine Bertram
- Department of Food Science, Aarhus University, Agro Food Park 48, 8200 Aarhus N, Denmark; (U.K.S.); (H.C.B.)
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189
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Badger R, Aho K, Serve K. Short-term exposure to synthetic flaxseed lignan LGM2605 alters gut microbiota in mice. Microbiologyopen 2021; 10:e1185. [PMID: 33970540 PMCID: PMC8087944 DOI: 10.1002/mbo3.1185] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 03/24/2021] [Accepted: 03/24/2021] [Indexed: 12/11/2022] Open
Abstract
LGM2605 is a synthetic version of the naturally occurring flaxseed lignan secoisolariciresinol diglucoside (SDG), with known anti‐inflammatory and antioxidant properties; however, its effects on gut microbial composition have not previously been evaluated. In the present study, we sought to determine how the 10‐day oral administration of LGM2605 alters the gut microbiota of mice. Eight‐week‐old female C57BL/6 mice were treated with either LGM2605 or saline, administered daily via oral gavage over a 10‐day treatment period. Upon termination of treatment, mouse cecums (n = 31) were collected, and cecal DNA was isolated. 16S rRNA genes were sequenced and analyzed in Mothur to identify changes in gut microbial composition induced by LGM2605 treatment (v. saline control). We then assessed community composition, performed indicator taxa analysis, and measured alpha and beta diversity. Overall, LGM2605 significantly altered the gut microbiota of mice; we reported alterations in 3 bacterial phyla and 22 genera as a result of treatment. The study here identifies for the first time significant alterations in the gut microbiota of mice following oral administration of LGM2605, in general shifting toward a more anti‐inflammatory composition. These findings lay the foundation for future investigations utilizing LGM2605 to control gut dysbiosis and, by extension, systemic inflammation.
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Affiliation(s)
- Reagan Badger
- Department of Biological Sciences, Idaho State University, Pocatello, ID, USA
| | - Ken Aho
- Department of Biological Sciences, Idaho State University, Pocatello, ID, USA
| | - Kinta Serve
- Department of Biological Sciences, Idaho State University, Pocatello, ID, USA
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190
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Jacobsen EA, Jackson DJ, Heffler E, Mathur SK, Bredenoord AJ, Pavord ID, Akuthota P, Roufosse F, Rothenberg ME. Eosinophil Knockout Humans: Uncovering the Role of Eosinophils Through Eosinophil-Directed Biological Therapies. Annu Rev Immunol 2021; 39:719-757. [PMID: 33646859 PMCID: PMC8317994 DOI: 10.1146/annurev-immunol-093019-125918] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The enigmatic eosinophil has emerged as an exciting component of the immune system, involved in a plethora of homeostatic and inflammatory responses. Substantial progress has been achieved through experimental systems manipulating eosinophils in vivo, initially in mice and more recently in humans. Researchers using eosinophil knockout mice have identified a contributory role for eosinophils in basal and inflammatory processes and protective immunity. Primarily fueled by the purported proinflammatory role of eosinophils in eosinophil-associated diseases, a series of anti-eosinophil therapeutics have emerged as a new class of drugs. These agents, which dramatically deplete eosinophils, provide a valuable opportunity to characterize the consequences of eosinophil knockout humans. Herein, we comparatively describe mouse and human eosinophil knockouts. We put forth the view that human eosinophils negatively contribute to a variety of diseases and, unlike mouse eosinophils, do not yet have an identified role in physiological health; thus, clarifying all roles of eosinophils remains an ongoing pursuit.
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Affiliation(s)
- Elizabeth A Jacobsen
- Division of Allergy, Asthma and Clinical Immunology, Mayo Clinic, Scottsdale, Arizona 85259, USA;
| | - David J Jackson
- Guy's and St Thomas' Hospitals, London WC2R 2LS, United Kingdom;
- Department of Immunobiology, King's College London, London WC2R 2LS, United Kingdom
| | - Enrico Heffler
- Department of Biomedical Sciences, Humanitas University, 20090 Milan, Italy
- Personalized Medicine, Asthma and Allergy Unit, Humanitas Clinical and Research Center IRCCS, 20089 Milan, Italy;
| | - Sameer K Mathur
- Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin 53792, USA;
| | - Albert J Bredenoord
- Department of Gastroenterology and Hepatology, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands;
| | - Ian D Pavord
- Respiratory Medicine Unit, Oxford Respiratory NIHR BRC, Nuffield Department of Medicine, Oxford OX3 9DU, United Kingdom;
| | - Praveen Akuthota
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, University of California, San Diego, La Jolla, California 92093, USA;
| | - Florence Roufosse
- Médecine Interne, Hôpital Erasme, Université Libre de Bruxelles, 1070 Brussels, Belgium;
| | - Marc E Rothenberg
- Division of Allergy and Immunology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio 45229, USA;
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191
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Thymoquinone, a Dietary Bioactive Compound, Exerts Anti-Inflammatory Effects in Colitis by Stimulating Expression of the Colonic Epithelial PPAR-γ Transcription Factor. Nutrients 2021; 13:nu13041343. [PMID: 33920708 PMCID: PMC8073634 DOI: 10.3390/nu13041343] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 04/07/2021] [Accepted: 04/15/2021] [Indexed: 01/24/2023] Open
Abstract
Inflammatory bowel diseases (IBD) are chronic inflammatory disorders with increasing incidence and prevalence worldwide. Here, we investigated thymoquinone (TQ), a naturally occurring phytochemical present in Nigella sativa, for anti-inflammatory effects in colonic inflammation. To address this, we used in vivo (mice) and in vitro (HT-29 cells) models in this investigation. Our results showed that TQ treatment significantly reduced the disease activity index (DAI), myeloperoxidase (MPO) activity, and protected colon microscopic architecture. In addition, TQ also reduced the expression of proinflammatory cytokines and mediators at both the mRNA and protein levels. Further, TQ decreased phosphorylation of the activated mitogen-activated protein kinase (MAPK) signaling pathway and nuclear factor kappa B (NF-κB) proteins and enhanced colon epithelial PPAR-γ transcription factor expression. TQ significantly decreased proinflammatory chemokines (CXCL-1 and IL-8), and mediator (COX-2) mRNA expression in HT-29 cells treated with TNF-α. TQ also increased HT-29 PPAR-γ mRNA, PPAR-γ protein expression, and PPAR-γ promoter activity. These results indicate that TQ inhibits MAPK and NF-κB signaling pathways and transcriptionally regulates PPAR-γ expression to induce potent anti-inflammatory activity in vivo and in vitro models of colon inflammation.
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192
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Consumption of indigestible saccharides and administration of Bifidobacterium pseudolongum reduce mucosal serotonin in murine colonic mucosa. Br J Nutr 2021; 127:513-525. [PMID: 33849681 DOI: 10.1017/s0007114521001306] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
SCFA increase serotonin (5-hydroxytryptamine, 5-HT) synthesis and content in the colon in vitro and ex vivo, but little is known in vivo. We tested whether dietary indigestible saccharides, utilised as a substrate to produce SCFA by gut microbiota, would increase colonic 5-HT content in mice. Male C57BL/6J mice were fed a purified diet and water supplemented with 4 % (w/v) 1-kestose (KES) for 2 weeks. Colonic 5-HT content and enterochromaffin (EC) cell numbers were lower in mice supplemented with KES than those without supplementation, while monoamine oxidase A activity and mRNA levels of tryptophan hydroxylase 1 (Tph1), chromogranin A (Chga), Slc6a4 and monoamine oxidase A (Maoa) genes in the colonic mucosa, serum 5-HT concentration and total 5-HT content in the colonic contents did not differ between groups. Caecal acetate concentration and Bifidobacterium pseudolongum population were higher in KES-supplemented mice. Similar trends were observed in mice supplemented with other indigestible saccharides, that is, fructo-oligosaccharides, inulin and raffinose. Intragastric administration of live B. pseudolongum (108 colony-forming units/d) for 2 weeks reduced colonic 5-HT content and EC cell numbers. These results suggest that changes in synthesis, reuptake, catabolism and overflow of 5-HT in the colonic mucosa are not involved in the reduction of colonic 5-HT content by dietary indigestible saccharides in mice. We propose that gut microbes including B. pseudolongum could contribute to the reduction of 5-HT content in the colonic mucosa via diminishing EC cells.
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193
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Genome-Based Targeted Sequencing as a Reproducible Microbial Community Profiling Assay. mSphere 2021; 6:6/2/e01325-20. [PMID: 33827913 PMCID: PMC8546724 DOI: 10.1128/msphere.01325-20] [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: 11/30/2022] Open
Abstract
Current sequencing-based methods for profiling microbial communities rely on marker gene (e.g., 16S rRNA) or metagenome shotgun sequencing (mWGS) analysis. We present an approach based on a single-primer extension reaction using a highly multiplexed oligonucleotide probe pool. This approach, termed MA-GenTA (microbial abundances from genome tagged analysis), enables quantitative, straightforward, cost-effective microbiome profiling that combines desirable features of both 16S rRNA and mWGS strategies. The use of multiple probes per target genome and rigorous probe design criteria enabled robust determination of relative abundance. To test the utility of the MA-GenTA assay, probes were designed for 830 genome sequences representing bacteria present in mouse stool specimens. Comparison of the MA-GenTA data with mWGS data demonstrated excellent correlation down to 0.01% relative abundance and a similar number of organisms detected per sample. Despite the incompleteness of the reference database, nonmetric multidimensional scaling (NMDS) clustering based on the Bray-Curtis dissimilarity metric of sample groups was consistent between MA-GenTA, mWGS, and 16S rRNA data sets. MA-GenTA represents a potentially useful new method for microbiome community profiling based on reference genomes. IMPORTANCE New methods for profiling the microbial communities can create new approaches to understanding the composition and function of those communities. In this study, we combined bacterial genome-specific probe design with a highly multiplexed single primer extension reaction as a new method to profile microbial communities, using stool from various mouse strains as a test case. This method, termed MA-GenTA, was benchmarked against 16S rRNA gene sequencing and metagenome sequencing methods and delivered similar relative abundance and clustering data. Since the probes were generated from reference genomes, MA-GenTA was also able to provide functional pathway data for the stool microbiome in the assayed samples. The method is more informative than 16S rRNA analysis while being less costly than metagenome shotgun sequencing.
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194
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Sun D, Bai R, Zhou W, Yao Z, Liu Y, Tang S, Ge X, Luo L, Luo C, Hu GF, Sheng J, Xu Z. Angiogenin maintains gut microbe homeostasis by balancing α-Proteobacteria and Lachnospiraceae. Gut 2021; 70:666-676. [PMID: 32843357 PMCID: PMC7904960 DOI: 10.1136/gutjnl-2019-320135] [Citation(s) in RCA: 88] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Revised: 06/18/2020] [Accepted: 07/12/2020] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Antimicrobial peptides (AMPs) play essential roles in maintaining gut health and are associated with IBD. This study is to elucidate the effect of angiogenin (ANG), an intestine-secreted AMP, on gut microbiota and its relevance with IBD. DESIGN The effect of ANG on microbiota and its contribution to colitis were evaluated in different colitis models with co-housing and faecal microbiota transplantation. ANG-regulated bacteria were determined by 16S rDNA sequencing and their functions in colitis were analysed by bacterial colonisation. The species-specific antimicrobial activity of ANG and its underlying mechanism were further investigated with microbiological and biochemical methods. ANG level and the key bacteria were characterised in IBD faecal samples. RESULTS ANG regulated microbiota composition and inhibited intestinal inflammation. Specifically, Ang1 deficiency in mice led to a decrease in the protective gut commensal strains of Lachnospiraceae but an increase in the colitogenic strains of α-Proteobacteria. Direct binding of ANG to α-Proteobacteria resulted in lethal disruption of bacterial membrane integrity, and consequently promoted the growth of Lachnospiraceae, which otherwise was antagonised by α-Proteobacteria. Oral administration of ANG1 reversed the dysbiosis and attenuated the severity of colitis in Ang1-deficient mice. The correlation among ANG, the identified bacteria and IBD status was established in patients. CONCLUSION These findings demonstrate a novel role of ANG in shaping gut microbe composition and thus maintaining gut health, suggesting that the ANG-microbiota axis could be developed as a potential preventive and/or therapeutic approach for dysbiosis-related gut diseases.
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Affiliation(s)
- Desen Sun
- Institute of Environmental Medicine, and Cancer Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou, Zhejiang, China
- Zhejiang Laboratory for Systems and Precison Medicine, Zhejiang University Medical Center, Hangzhou, Zhejiang, China
| | - Rongpan Bai
- Institute of Environmental Medicine, and Cancer Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou, Zhejiang, China
| | - Wei Zhou
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Zhengrong Yao
- Institute of Environmental Medicine, and Cancer Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yaxin Liu
- Institute of Environmental Medicine, and Cancer Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou, Zhejiang, China
| | - Shasha Tang
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Xiaolong Ge
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Liang Luo
- Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Chi Luo
- Institute of Environmental Medicine, and Cancer Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Bioelectromagnetics Laboratory, Zhejiang University School of Public Health, Hangzhou, Zhejiang, China
| | - Guo-Fu Hu
- Division of Hematology and Oncology, Department of Medicine, Tufts Medical Center, Boston, Massachusetts, USA
| | - Jinghao Sheng
- Institute of Environmental Medicine, and Cancer Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou, Zhejiang, China
- Zhejiang Laboratory for Systems and Precison Medicine, Zhejiang University Medical Center, Hangzhou, Zhejiang, China
- Bioelectromagnetics Laboratory, Zhejiang University School of Public Health, Hangzhou, Zhejiang, China
| | - Zhengping Xu
- Institute of Environmental Medicine, and Cancer Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou, Zhejiang, China
- Zhejiang Laboratory for Systems and Precison Medicine, Zhejiang University Medical Center, Hangzhou, Zhejiang, China
- Bioelectromagnetics Laboratory, Zhejiang University School of Public Health, Hangzhou, Zhejiang, China
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195
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Abeynaike S, Paust S. Humanized Mice for the Evaluation of Novel HIV-1 Therapies. Front Immunol 2021; 12:636775. [PMID: 33868262 PMCID: PMC8047330 DOI: 10.3389/fimmu.2021.636775] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 03/01/2021] [Indexed: 12/13/2022] Open
Abstract
With the discovery of antiretroviral therapy, HIV-1 infection has transitioned into a manageable but chronic illness, which requires lifelong treatment. Nevertheless, complete eradication of the virus has still eluded us. This is partly due to the virus’s ability to remain in a dormant state in tissue reservoirs, ‘hidden’ from the host’s immune system. Also, the high mutation rate of HIV-1 results in escape mutations in response to many therapeutics. Regardless, the development of novel cures for HIV-1 continues to move forward with a range of approaches from immunotherapy to gene editing. However, to evaluate in vivo pathogenesis and the efficacy and safety of therapeutic approaches, a suitable animal model is necessary. To this end, the humanized mouse was developed by McCune in 1988 and has continued to be improved on over the past 30 years. Here, we review the variety of humanized mouse models that have been utilized through the years and describe their specific contribution in translating HIV-1 cure strategies to the clinic.
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Affiliation(s)
- Shawn Abeynaike
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, United States.,The Skaggs Graduate Program in Chemical and Biological Sciences, The Scripps Research Institute, La Jolla, CA, United States
| | - Silke Paust
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, United States.,The Skaggs Graduate Program in Chemical and Biological Sciences, The Scripps Research Institute, La Jolla, CA, United States
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196
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Huang K, Liu C, Peng M, Su Q, Liu R, Guo Z, Chen S, Li Z, Chang G. Glycoursodeoxycholic Acid Ameliorates Atherosclerosis and Alters Gut Microbiota in Apolipoprotein E-Deficient Mice. J Am Heart Assoc 2021; 10:e019820. [PMID: 33787322 PMCID: PMC8174342 DOI: 10.1161/jaha.120.019820] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background Although glycoursodeoxycholic acid (GUDCA) has been associated with the improvement of metabolic disorders, its effect on atherosclerosis remains elusive. This study aimed to investigate the role of GUDCA in the development of atherosclerosis and its potential mechanisms. Methods and Results Human THP‐1 macrophages were used to investigate the effect of GUDCA on oxidized low‐density lipoprotein–induced foam cell formation in vitro. We found that GUDCA downregulated scavenger receptor A1 mRNA expression, reduced oxidized low‐density lipoprotein uptake, and inhibited macrophage foam cell formation. In an in vivo study, apolipoprotein E–deficient mice were fed a Western diet for 10 weeks to induce atherosclerosis, and then were gavaged once daily with or without GUDCA for 18 weeks. Parameters of systemic metabolism and atherosclerosis were detected. We found that GUDCA improved cholesterol homeostasis and protected against atherosclerosis progression as evidenced by reduced plaque area along with lipid deposition, ameliorated local chronic inflammation, and elevated plaque stability. In addition, 16S rDNA sequencing showed that GUDCA administration partially normalized the Western diet–associated gut microbiota dysbiosis. Interestingly, the changes of bacterial genera (Alloprevotella, Parabacteroides, Turicibacter, and Alistipes) modulated by GUDCA were correlated with the plaque area in mice aortas. Conclusions Our study for the first time indicates that GUDCA attenuates the development of atherosclerosis, probably attributable to the inhibition of foam cell formation, maintenance of cholesterol homeostasis, and modulation of gut microbiota.
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Affiliation(s)
- Kan Huang
- Division of Vascular Surgery First Affiliated Hospital, Sun Yat-sen University Guangzhou China.,National-Guangdong Joint Engineering Laboratory for Diagnosis and Treatment of Vascular Diseases First Affiliated Hospital, Sun Yat-sen University Guangzhou China
| | - Chenshu Liu
- Division of Vascular Surgery First Affiliated Hospital, Sun Yat-sen University Guangzhou China.,National-Guangdong Joint Engineering Laboratory for Diagnosis and Treatment of Vascular Diseases First Affiliated Hospital, Sun Yat-sen University Guangzhou China
| | - Meixiu Peng
- Division of Vascular Surgery First Affiliated Hospital, Sun Yat-sen University Guangzhou China.,National-Guangdong Joint Engineering Laboratory for Diagnosis and Treatment of Vascular Diseases First Affiliated Hospital, Sun Yat-sen University Guangzhou China
| | - Qiao Su
- Animal Center First Affiliated Hospital, Sun Yat-sen University Guangzhou China
| | - Ruiming Liu
- National-Guangdong Joint Engineering Laboratory for Diagnosis and Treatment of Vascular Diseases First Affiliated Hospital, Sun Yat-sen University Guangzhou China
| | - Zeling Guo
- Zhongshan School of Medicine Sun Yat-sen University Guangzhou China
| | - Sifan Chen
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation Medical Research Center Sun Yat-Sen Memorial Hospital Guangzhou China
| | - Zilun Li
- Division of Vascular Surgery First Affiliated Hospital, Sun Yat-sen University Guangzhou China.,National-Guangdong Joint Engineering Laboratory for Diagnosis and Treatment of Vascular Diseases First Affiliated Hospital, Sun Yat-sen University Guangzhou China
| | - Guangqi Chang
- Division of Vascular Surgery First Affiliated Hospital, Sun Yat-sen University Guangzhou China.,National-Guangdong Joint Engineering Laboratory for Diagnosis and Treatment of Vascular Diseases First Affiliated Hospital, Sun Yat-sen University Guangzhou China
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197
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The Effects of Pro-, Pre-, and Synbiotics on Muscle Wasting, a Systematic Review-Gut Permeability as Potential Treatment Target. Nutrients 2021; 13:nu13041115. [PMID: 33805286 PMCID: PMC8065581 DOI: 10.3390/nu13041115] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 03/18/2021] [Accepted: 03/23/2021] [Indexed: 02/08/2023] Open
Abstract
Muscle wasting is a frequently observed, inflammation-driven condition in aging and disease, known as sarcopenia and cachexia. Current treatment strategies target the muscle directly and are often not able to reverse the process. Because a reduced gut function is related to systemic inflammation, this might be an indirect target to ameliorate muscle wasting, by administering pro-, pre-, and synbiotics. Therefore, this review aimed to study the potential of pro-, pre-, and synbiotics to treat muscle wasting and to elucidate which metabolites and mechanisms affect the organ crosstalk in cachexia. Overall, the literature shows that Lactobacillus species pluralis (spp.) and possibly other genera, such as Bifidobacterium, can ameliorate muscle wasting in mouse models. The beneficial effects of Lactobacillus spp. supplementation may be attributed to its potential to improve microbiome balance and to its reported capacity to reduce gut permeability. A subsequent literature search revealed that the reduction of a high gut permeability coincided with improved muscle mass or strength, which shows an association between gut permeability and muscle mass. A possible working mechanism is proposed, involving lactate, butyrate, and reduced inflammation in gut–brain–muscle crosstalk. Thus, reducing gut permeability via Lactobacillus spp. supplementation could be a potential treatment strategy for muscle wasting.
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198
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Bayer G, Ganobis CM, Allen-Vercoe E, Philpott DJ. Defined gut microbial communities: promising tools to understand and combat disease. Microbes Infect 2021; 23:104816. [PMID: 33785422 DOI: 10.1016/j.micinf.2021.104816] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 03/18/2021] [Accepted: 03/22/2021] [Indexed: 12/17/2022]
Abstract
Defined gut microbial communities are emerging tools that allow detailed studies of microbial ecosystems and their interactions with the host. In this article, we review strategies underlying the design of defined consortia and summarize the efforts to introduce simplified communities into in vitro and in vivo models. We conclude by highlighting the potential of defined microbial ecosystems as effective modulation strategies for health benefits.
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Affiliation(s)
- Giuliano Bayer
- Department of Immunology, University of Toronto, Toronto, Ontario, M5S 1A8, Canada
| | - Caroline M Ganobis
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| | - Emma Allen-Vercoe
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| | - Dana J Philpott
- Department of Immunology, University of Toronto, Toronto, Ontario, M5S 1A8, Canada.
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199
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Xiang S, Ye K, Li M, Ying J, Wang H, Han J, Shi L, Xiao J, Shen Y, Feng X, Bao X, Zheng Y, Ge Y, Zhang Y, Liu C, Chen J, Chen Y, Tian S, Zhu X. Xylitol enhances synthesis of propionate in the colon via cross-feeding of gut microbiota. MICROBIOME 2021; 9:62. [PMID: 33736704 PMCID: PMC7977168 DOI: 10.1186/s40168-021-01029-6] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 02/05/2021] [Indexed: 05/12/2023]
Abstract
BACKGROUND Xylitol, a white or transparent polyol or sugar alcohol, is digestible by colonic microorganisms and promotes the proliferation of beneficial bacteria and the production of short-chain fatty acids (SCFAs), but the mechanism underlying these effects remains unknown. We studied mice fed with 0%, 2% (2.17 g/kg/day), or 5% (5.42 g/kg/day) (weight/weight) xylitol in their chow for 3 months. In addition to the in vivo digestion experiments in mice, 3% (weight/volume) (0.27 g/kg/day for a human being) xylitol was added to a colon simulation system (CDMN) for 7 days. We performed 16S rRNA sequencing, beneficial metabolism biomarker quantification, metabolome, and metatranscriptome analyses to investigate the prebiotic mechanism of xylitol. The representative bacteria related to xylitol digestion were selected for single cultivation and co-culture of two and three bacteria to explore the microbial digestion and utilization of xylitol in media with glucose, xylitol, mixed carbon sources, or no-carbon sources. Besides, the mechanisms underlying the shift in the microbial composition and SCFAs were explored in molecular contexts. RESULTS In both in vivo and in vitro experiments, we found that xylitol did not significantly influence the structure of the gut microbiome. However, it increased all SCFAs, especially propionate in the lumen and butyrate in the mucosa, with a shift in its corresponding bacteria in vitro. Cross-feeding, a relationship in which one organism consumes metabolites excreted by the other, was observed among Lactobacillus reuteri, Bacteroides fragilis, and Escherichia coli in the utilization of xylitol. At the molecular level, we revealed that xylitol dehydrogenase (EC 1.1.1.14), xylulokinase (EC 2.7.1.17), and xylulose phosphate isomerase (EC 5.1.3.1) were key enzymes in xylitol metabolism and were present in Bacteroides and Lachnospiraceae. Therefore, they are considered keystone bacteria in xylitol digestion. Also, xylitol affected the metabolic pathway of propionate, significantly promoting the transcription of phosphate acetyltransferase (EC 2.3.1.8) in Bifidobacterium and increasing the production of propionate. CONCLUSIONS Our results revealed that those key enzymes for xylitol digestion from different bacteria can together support the growth of micro-ecology, but they also enhanced the concentration of propionate, which lowered pH to restrict relative amounts of Escherichia and Staphylococcus. Based on the cross-feeding and competition among those bacteria, xylitol can dynamically balance proportions of the gut microbiome to promote enzymes related to xylitol metabolism and SCFAs. Video Abstract.
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Affiliation(s)
- Shasha Xiang
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Kun Ye
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Mian Li
- Zhejiang Huakang Pharmaceutical Co., Ltd., Kaihua, 324302 China
| | - Jian Ying
- Nutrition and Health Research Institute, COFCO Ltd., Beijing, 102209 China
| | - Huanhuan Wang
- School of Medicine, Hangzhou Normal University, Hangzhou, 310018 China
- Laboratory of Aging and Cancer Biology of Zhejiang Province, Hangzhou Normal University, Hangzhou, 311121 China
| | - Jianzhong Han
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Lihua Shi
- Zhejiang Huakang Pharmaceutical Co., Ltd., Kaihua, 324302 China
| | - Jie Xiao
- Nutrition and Health Research Institute, COFCO Ltd., Beijing, 102209 China
| | - Yubiao Shen
- Yangtze Delta Institute of Tsinghua University, Jiaxing, 314000 China
| | - Xiao Feng
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Xuan Bao
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Yiqing Zheng
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Yin Ge
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Yalin Zhang
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Chang Liu
- School of Food Science and Technology, Jiangnan University, Wuxi, 214122 China
| | - Jie Chen
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Yuewen Chen
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Shiyi Tian
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Xuan Zhu
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
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Mu W, Sharma M, Heymans R, Ritou E, Rezek V, Hamid P, Kossyvakis A, Sen Roy S, Grijalva V, Chattopadhyay A, Papesh J, Meriwether D, Kitchen SG, Fogelman AM, Reddy ST, Kelesidis T. Apolipoprotein A-I mimetics attenuate macrophage activation in chronic treated HIV. AIDS 2021; 35:543-553. [PMID: 33306550 PMCID: PMC8010648 DOI: 10.1097/qad.0000000000002785] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
OBJECTIVES Despite antiretroviral therapy (ART), there is an unmet need for therapies to mitigate immune activation in HIV infection. The goal of this study is to determine whether the apoA-I mimetics 6F and 4F attenuate macrophage activation in chronic HIV. DESIGN Preclinical assessment of the in-vivo impact of Tg6F and the ex-vivo impact of apoA-I mimetics on biomarkers of immune activation and gut barrier dysfunction in treated HIV. METHODS We used two humanized murine models of HIV infection to determine the impact of oral Tg6F with ART (HIV+ART+Tg6F+) on innate immune activation (plasma human sCD14, sCD163) and gut barrier dysfunction [murine I-FABP, endotoxin (LPS), LPS-binding protein (LBP), murine sCD14]. We also used gut explants from 10 uninfected and 10 HIV-infected men on potent ART and no morbidity, to determine the impact of ex-vivo treatment with 4F for 72 h on secretion of sCD14, sCD163, and I-FABP from gut explants. RESULTS When compared with mice treated with ART alone (HIV+ART+), HIV+ART+Tg6F+ mice attenuated macrophage activation (h-sCD14, h-sCD163), gut barrier dysfunction (m-IFABP, LPS, LBP, and m-sCD14), plasma and gut tissue oxidized lipoproteins. The results were consistent with independent mouse models and ART regimens. Both 4F and 6F attenuated shedding of I-FABP and sCD14 from gut explants from HIV-infected and uninfected participants. CONCLUSION Given that gut barrier dysfunction and macrophage activation are contributors to comorbidities like cardiovascular disease in HIV, apoA-I mimetics should be tested as therapy for morbidity in chronic treated HIV.
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Affiliation(s)
- William Mu
- Division of Infectious Diseases
- Division of Hematology and Oncology
| | | | | | | | | | - Philip Hamid
- Division of Infectious Diseases
- Division of Hematology and Oncology
| | | | | | - Victor Grijalva
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine
| | - Arnab Chattopadhyay
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine
| | - Jeremy Papesh
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine
| | - David Meriwether
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine
| | | | - Alan M Fogelman
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine
| | - Srinivasa T Reddy
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine
- Department of Molecular and Medical Pharmacology
- Molecular Toxicology Interdepartmental Degree Program, University of California Los Angeles
- Department of Obstetrics and Gynecology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, USA
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