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Xiang Z, Tong W, Guo Z, Xu Y, Guo J, Ruan Y, Zhao P. Rat H1 parvovirus infection leads to alterations in gut microbiota. Pathog Dis 2020; 77:5585884. [PMID: 31603501 DOI: 10.1093/femspd/ftz058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 10/09/2019] [Indexed: 01/21/2023] Open
Abstract
H1 parvovirus (H1PV) infection in rats is of concern to the research community as infection may compromise rodent-based experiments. The aim of this study was to evaluate the influence of H1PV infection on rat gut microbiota. Inbred Wistar rats were infected with H1PV by routine gavage and clinical signs were recorded. Gross anatomical and histopathological examination of the gut was performed, as was immune cytokine analysis. The cecal contents were also collected for 16S rRNA sequencing. Gross anatomical examination showed distention of the ileum associated with flatulence after infection, while histopathological examination showed hyperemia and inflammatory cell infiltration in the ileum. Upregulation of the interleukin-6 in sera in H1PV infected rats was also detected. The gut microbiota had been significantly changed in H1PV infected rats: there was a reduction in several bacteria species including probiotic bacteria from the genera Parabacteroides and Butyricicoccus, while others were increased, including those from the genera Methanobrevibacter and Syntrophococcus. Taken together, these results demonstrate that chronic H1PV infection in rats leads to gastrointestinal inflammation with flatulence. The gut microbiota alterations were associated with decreased polymorphisms, reduced abundance of probiotic bacteria and increased abundance of methane-producing bacteria.
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Affiliation(s)
- Zhiguang Xiang
- Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences, Peking Union Medical College, Panjiayuan nanli #5, Chaoyang District, Beijing 100021, China
| | - Wei Tong
- Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences, Peking Union Medical College, Panjiayuan nanli #5, Chaoyang District, Beijing 100021, China
| | - Zhi Guo
- Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences, Peking Union Medical College, Panjiayuan nanli #5, Chaoyang District, Beijing 100021, China
| | - Yanfeng Xu
- Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences, Peking Union Medical College, Panjiayuan nanli #5, Chaoyang District, Beijing 100021, China
| | - Jianguo Guo
- Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences, Peking Union Medical College, Panjiayuan nanli #5, Chaoyang District, Beijing 100021, China
| | - Yanshuo Ruan
- Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences, Peking Union Medical College, Panjiayuan nanli #5, Chaoyang District, Beijing 100021, China
| | - Peng Zhao
- Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences, Peking Union Medical College, Panjiayuan nanli #5, Chaoyang District, Beijing 100021, China
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Abstract
PURPOSE OF REVIEW Evidence is mounting that disturbances in the gut microbiota play a role in the rising incidence of type 1 diabetes (T1D) and new technologies are expanding our ability to understand microbial function and host interactions. Longitudinal data from large cohorts of children at risk of T1D are nor solidifying our understanding of the function of the microbiota in this disease. RECENT FINDINGS Although taxonomic changes in the gut microbiota associated with T1D are relatively modest, a functional defect in production of short-chain fatty acids (SCFAs) remains as a unifying feature across multiple studies and populations. Dysbiosis of the microbiota in T1D has been linked to decreased gut barrier and exocrine pancreas function. We explore factors contributing to the disturbed microbiota in T1D such as infant diet, probiotic use and genetic risk linked to defective immune regulation. We also discuss the interplay between immunotherapy, the gut immune response and the microbiota. SUMMARY Functional alterations in the microbiota are linked to pathogenesis of T1D and these findings provide a rationale for future investigations aimed at establishing a healthy microbiota and promoting SCFA production and prevention of T1D.
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Affiliation(s)
- Patrick G Gavin
- The University of Queensland Diamantina Institute, The University of Queensland, Woolloongabba, Queensland, Australia
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Corbin KD, Driscoll KA, Pratley RE, Smith SR, Maahs DM, Mayer-Davis EJ. Obesity in Type 1 Diabetes: Pathophysiology, Clinical Impact, and Mechanisms. Endocr Rev 2018; 39:629-663. [PMID: 30060120 DOI: 10.1210/er.2017-00191] [Citation(s) in RCA: 137] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 06/21/2018] [Indexed: 02/07/2023]
Abstract
There has been an alarming increase in the prevalence of obesity in people with type 1 diabetes in recent years. Although obesity has long been recognized as a major risk factor for the development of type 2 diabetes and a catalyst for complications, much less is known about the role of obesity in the initiation and pathogenesis of type 1 diabetes. Emerging evidence suggests that obesity contributes to insulin resistance, dyslipidemia, and cardiometabolic complications in type 1 diabetes. Unique therapeutic strategies may be required to address these comorbidities within the context of intensive insulin therapy, which promotes weight gain. There is an urgent need for clinical guidelines for the prevention and management of obesity in type 1 diabetes. The development of these recommendations will require a transdisciplinary research strategy addressing metabolism, molecular mechanisms, lifestyle, neuropsychology, and novel therapeutics. In this review, the prevalence, clinical impact, energy balance physiology, and potential mechanisms of obesity in type 1 diabetes are described, with a special focus on the substantial gaps in knowledge in this field. Our goal is to provide a framework for the evidence base needed to develop type 1 diabetes-specific weight management recommendations that account for the competing outcomes of glycemic control and weight management.
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Affiliation(s)
- Karen D Corbin
- Translational Research Institute for Metabolism and Diabetes, Florida Hospital, Orlando, Florida
| | - Kimberly A Driscoll
- Department of Pediatrics, School of Medicine, University of Colorado Denver, Aurora, Colorado.,Barbara Davis Center for Diabetes, Aurora, Colorado
| | - Richard E Pratley
- Translational Research Institute for Metabolism and Diabetes, Florida Hospital, Orlando, Florida
| | - Steven R Smith
- Translational Research Institute for Metabolism and Diabetes, Florida Hospital, Orlando, Florida
| | - David M Maahs
- Division of Pediatric Endocrinology, Department of Pediatrics, Stanford University, Stanford, California
| | - Elizabeth J Mayer-Davis
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
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Yuan X, Long Y, Ji Z, Gao J, Fu T, Yan M, Zhang L, Su H, Zhang W, Wen X, Pu Z, Chen H, Wang Y, Gu X, Yan B, Kaliannan K, Shao Z. Green Tea Liquid Consumption Alters the Human Intestinal and Oral Microbiome. Mol Nutr Food Res 2018; 62:e1800178. [PMID: 29750437 PMCID: PMC6033105 DOI: 10.1002/mnfr.201800178] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 04/12/2018] [Indexed: 12/16/2022]
Abstract
SCOPE GTPs (green tea polyphenols) exert anti-CRC (colorectal cancer) activity. The intestinal microbiota and intestinal colonization by bacteria of oral origin has been implicated in colorectal carcinogenesis. GT modulates the composition of mouse gut microbiota harmonious with anticancer activity. Therefore, the effect of green tea liquid (GTL) consumption on the gut and oral microbiome is investigated in healthy volunteers (n = 12). METHODS AND RESULTS 16S sequencing and phylogenetic investigation of communities by reconstruction of unobserved states (PICRUSt) analysis of both fecal and saliva samples (collected before intervention, after 2 weeks of GTL (400 mL per day) and after a washout period of one week) in healthy volunteers show changes in microbial diversity and core microbiota and difference in clear classification (partial least squares-discriminant analysis [PLS-DA]). An irreversible, increased FIR:BAC (Firmicutes to Bacteroidetes ratio), elevated SCFA producing genera, and reduction of bacterial LPS synthesis in feces are discovered in response to GTL. GTL alters the salivary microbiota and reduces the functional pathways abundance relevance to carcinogenesis. Similar bacterial networks in fecal and salivary microbiota datasets comprising putative oral bacteria are found and GTL reduces the fecal levels of Fusobacterium. Interestingly, both Lachnospiraceae and B/E (Bifidobacterium to Enterobacteriacea ratio-markers of colonization resistance [CR]) are negatively associated with the presence of oral-like bacterial networks in the feces. CONCLUSION These results suggest that GTL consumption causes both oral and gut microbiome alterations.
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Affiliation(s)
- Xiaojie Yuan
- Department of EpidemiologySchool of Public HealthFourth Military Medical UniversityXi'anShannxi710032China
| | - Yong Long
- Department of EpidemiologySchool of Public HealthFourth Military Medical UniversityXi'anShannxi710032China
| | - Zhaohua Ji
- Department of EpidemiologySchool of Public HealthFourth Military Medical UniversityXi'anShannxi710032China
| | - Jie Gao
- Department of EpidemiologySchool of Public HealthFourth Military Medical UniversityXi'anShannxi710032China
| | - Ting Fu
- Department of EpidemiologySchool of Public HealthFourth Military Medical UniversityXi'anShannxi710032China
| | - Min Yan
- Department of EpidemiologySchool of Public HealthFourth Military Medical UniversityXi'anShannxi710032China
| | - Lei Zhang
- Department of EpidemiologySchool of Public HealthFourth Military Medical UniversityXi'anShannxi710032China
| | - Haixia Su
- Department of EpidemiologySchool of Public HealthFourth Military Medical UniversityXi'anShannxi710032China
| | - Weilu Zhang
- Department of EpidemiologySchool of Public HealthFourth Military Medical UniversityXi'anShannxi710032China
| | - Xiaohui Wen
- Department of EpidemiologySchool of Public HealthFourth Military Medical UniversityXi'anShannxi710032China
| | - Zhongshu Pu
- Department of EpidemiologySchool of Public HealthFourth Military Medical UniversityXi'anShannxi710032China
| | - Hui Chen
- Department of EpidemiologySchool of Public HealthFourth Military Medical UniversityXi'anShannxi710032China
| | - Yufei Wang
- Department of EpidemiologySchool of Public HealthFourth Military Medical UniversityXi'anShannxi710032China
| | - Xu Gu
- Department of EpidemiologySchool of Public HealthFourth Military Medical UniversityXi'anShannxi710032China
| | - Binyuan Yan
- Department of EpidemiologySchool of Public HealthFourth Military Medical UniversityXi'anShannxi710032China
| | - Kanakaraju Kaliannan
- Laboratory for Lipid Medicine and TechnologyDepartment of Medicine, 149 13th StreetMassachusetts General Hospital and Harvard Medical SchoolBostonMA02129USA
| | - Zhongjun Shao
- Department of EpidemiologySchool of Public HealthFourth Military Medical UniversityXi'anShannxi710032China
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Zununi Vahed S, Moghaddas Sani H, Rahbar Saadat Y, Barzegari A, Omidi Y. Type 1 diabetes: Through the lens of human genome and metagenome interplay. Biomed Pharmacother 2018; 104:332-342. [PMID: 29775902 DOI: 10.1016/j.biopha.2018.05.052] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 05/09/2018] [Accepted: 05/09/2018] [Indexed: 02/07/2023] Open
Abstract
Diabetes is a genetic- and epigenetic-related disease from which a large population worldwide suffers. Some genetic factors along with various mutations related to the immune system for disease mechanism(s) have contrastively been determined. However, sometimes mechanisms have not been fully managed for the clarification of the initiation and/or progression of diseases to help patients. In the recent years, due to familiarity with the role of gut microbiota in the health, it has been found that the changes of the microbial balance in the industrialized societies can cause a battery of modern diseases, for which we have no specific definition of how they emerge. This work aims to explore the relationship between the human gut microbiota and the immune system along with their possible role in avoiding/emerging of type 1 diabetes (T1D) accompanied with the relation between genome and metagenome and their imbalance in causing T1D. Moreover, it provides novel view on how to balance the intestinal microbiota by lifestyle to hinder the mechanisms leading to T1D.
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Affiliation(s)
| | | | - Yalda Rahbar Saadat
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Abolfazl Barzegari
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Yadollah Omidi
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Pharmaceutics, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.
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Nycz BT, Dominguez SR, Friedman D, Hilden JM, Ir D, Robertson CE, Frank DN. Evaluation of bloodstream infections, Clostridium difficile infections, and gut microbiota in pediatric oncology patients. PLoS One 2018; 13:e0191232. [PMID: 29329346 PMCID: PMC5766145 DOI: 10.1371/journal.pone.0191232] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 12/29/2017] [Indexed: 01/11/2023] Open
Abstract
Bloodstream infections (BSI) and Clostridium difficile infections (CDI) in pediatric oncology/hematology/bone marrow transplant (BMT) populations are associated with significant morbidity and mortality. The objective of this study was to explore possible associations between altered microbiome composition and the occurrence of BSI and CDI in a cohort of pediatric oncology patients. Stool samples were collected from all patients admitted to the pediatric oncology floor from Oct.-Dec. 2012. Bacterial profiles from patient stools were determined by bacterial 16S rRNA gene profiling. Differences in overall microbiome composition were assessed by a permutation-based multivariate analysis of variance test, while differences in the relative abundances of specific taxa were assessed by Kruskal-Wallis tests. At admission, 9 of 42 patients (21%) were colonized with C. difficile, while 6 of 42 (14%) subsequently developed a CDI. Furthermore, 3 patients (7%) previously had a BSI and 6 patients (14%) subsequently developed a BSI. Differences in overall microbiome composition were significantly associated with disease type (p = 0.0086), chemotherapy treatment (p = 0.018), BSI following admission from any cause (p < 0.0001) or suspected gastrointestinal organisms (p = 0.00043). No differences in baseline microbiota were observed between individuals who did or did not subsequently develop C. difficile infection. Additionally, multiple bacterial groups varied significantly between subjects with post-admission BSI compared with no BSI. Our results suggest that differences in gut microbiota not only are associated with type of cancer and chemotherapy, but may also be predictive of subsequent bloodstream infection.
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Affiliation(s)
- Bryan T. Nycz
- Division of Adult Infectious Diseases, University of Colorado School of Medicine, Aurora, Colorado, United States of America
| | - Samuel R. Dominguez
- Division of Pediatric Infectious Diseases, University of Colorado School of Medicine, Aurora, Colorado, United States of America
| | - Deborah Friedman
- Department of Epidemiology, Children’s Hospital Colorado, Aurora, Colorado, United States of America
| | - Joanne M. Hilden
- Center for Blood and Cancer Disorders, Children’s Hospital Colorado, Aurora, Colorado, United States of America
| | - Diana Ir
- Division of Adult Infectious Diseases, University of Colorado School of Medicine, Aurora, Colorado, United States of America
| | - Charles E. Robertson
- Division of Adult Infectious Diseases, University of Colorado School of Medicine, Aurora, Colorado, United States of America
| | - Daniel N. Frank
- Division of Adult Infectious Diseases, University of Colorado School of Medicine, Aurora, Colorado, United States of America
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Abstract
PURPOSE OF REVIEW Despite immense research efforts, type 1 diabetes (T1D) remains an autoimmune disease without a known trigger or approved intervention. Over the last three decades, studies have primarily focused on delineating the role of the adaptive immune system in the mechanism of T1D. The discovery of Toll-like receptors in the 1990s has advanced the knowledge on the role of the innate immune system in host defense as well as mechanisms that regulate adaptive immunity including the function of autoreactive T cells. RECENT FINDINGS Recent investigations suggest that inflammation plays a key role in promoting a large number of autoimmune disorders including T1D. Data from the LEW1.WR1 rat model of virus-induced disease and the RIP-B7.1 mouse model of diabetes suggest that innate immune signaling plays a key role in triggering disease progression. There is also evidence that innate immunity may be involved in the course of T1D in humans; however, a small number of clinical trials have shown that interfering with the function of the innate immune system following disease onset exerts only a modest effect on β-cell function. The data implying that innate immune pathways are linked with mechanisms of islet autoimmunity hold great promise for the identification of novel disease pathways that may be harnessed for clinical intervention. Nevertheless, more work needs to be done to better understand mechanisms by which innate immunity triggers β-cell destruction and assess the therapeutic value in blocking innate immunity for diabetes prevention.
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Affiliation(s)
- James C Needell
- Barbara Davis Center for Childhood Diabetes, University of Colorado Denver, Aurora, CO, 80045, USA
| | - Danny Zipris
- Innate Biotechnologies LLC, Denver, CO, 80231, USA.
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