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Alonso S, Edelblum K. Metabolic regulation of γδ intraepithelial lymphocytes. DISCOVERY IMMUNOLOGY 2023; 2:kyad011. [PMID: 38179241 PMCID: PMC10766425 DOI: 10.1093/discim/kyad011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
Elucidating the relationship between cellular metabolism and T cell function has substantially advanced our understanding of how T cells are regulated in response to activation. The metabolic profiles of circulating or peripheral T cells have been well-described, yet less is known regarding how complex local microenvironments shape or modulate the bioenergetic profile of tissue-resident T lymphocytes. Intraepithelial lymphocytes expressing the γδ T cell receptor (γδ IEL) provide immunosurveillance of the intestinal epithelium to limit tissue injury and microbial invasion; however, their activation and effector responses occur independently of antigen recognition. In this review, we will summarize the current knowledge regarding γδ T cell and IEL metabolic profiles and how this informs our understanding of γδ IEL metabolism. We will also discuss the role of the gut microbiota in shaping the metabolic profile of these sentinel lymphocytes, and in turn, how these bioenergetics contribute to regulation of γδ IEL surveillance behavior and effector function. Improved understanding of the metabolic processes involved in γδ IEL homeostasis and function may yield novel strategies to amplify the protective functions of these cells in the context of intestinal health and disease.
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Affiliation(s)
- Sara Alonso
- Department of Pathology, Molecular and Cell-Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Karen Edelblum
- Department of Pathology, Molecular and Cell-Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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2
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Han J, Liu N, Jin W, Zanvit P, Zhang D, Xu J, Bynum A, Kazmi R, Zhang J, He W, Chen W. TGF-β controls development of TCRγδ +CD8αα + intestinal intraepithelial lymphocytes. Cell Discov 2023; 9:52. [PMID: 37253786 DOI: 10.1038/s41421-023-00542-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 03/11/2023] [Indexed: 06/01/2023] Open
Abstract
γδ intestinal intraepithelial lymphocytes (IELs) constitute the majority of IELs with unique CD8αα+ homodimers that are distinct from γδT cells in other tissues. However, it remains largely unclear how those cells develop. Here we show that transforming growth factor beta (TGF-β) signaling controls the development of TCRγδ+CD8αα+ IELs. Deletion of TGF-β receptors or Smad3 and Smad2 in bone marrow stem cells caused a deficiency of TCRγδ+CD8αα+ IELs in mixed bone marrow chimeric mice. Mechanistically, TGF-β is required for the development of TCRγδ+CD8αα+ IELs thymic precursors (CD44-CD25- γδ thymocytes). In addition, TGF-β signaling induced CD8α in thymic γδT cells and maintained CD8α expression and survival in TCRγδ+CD8αα+ IELs. Moreover, TGF-β also indirectly controls TCRγδ+CD8αα+ IELs by modulating the function of intestinal epithelial cells (IECs). Importantly, TGF-β signaling in TCRγδ+CD8αα+ IELs safeguarded the integrity of the intestinal barrier in dextran sulfate sodium (DSS)-induced colitis.
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Affiliation(s)
- Jiajia Han
- Mucosal Immunology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
- CAMS Key Laboratory for T Cell and Immunotherapy, State Key Laboratory of Medical Molecular Biology, Department of Immunology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - Na Liu
- Mucosal Immunology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Wenwen Jin
- Mucosal Immunology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Peter Zanvit
- Mucosal Immunology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Dunfang Zhang
- Mucosal Immunology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Junji Xu
- Mucosal Immunology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Andrew Bynum
- Mucosal Immunology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Rida Kazmi
- Mucosal Immunology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Jianmin Zhang
- CAMS Key Laboratory for T Cell and Immunotherapy, State Key Laboratory of Medical Molecular Biology, Department of Immunology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and School of Basic Medicine, Peking Union Medical College, Beijing, China.
| | - Wei He
- CAMS Key Laboratory for T Cell and Immunotherapy, State Key Laboratory of Medical Molecular Biology, Department of Immunology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and School of Basic Medicine, Peking Union Medical College, Beijing, China.
| | - WanJun Chen
- Mucosal Immunology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA.
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3
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Xu W, Bergsbaken T, Edelblum KL. The multifunctional nature of CD103 (αEβ7 integrin) signaling in tissue-resident lymphocytes. Am J Physiol Cell Physiol 2022; 323:C1161-C1167. [PMID: 36036450 PMCID: PMC9576162 DOI: 10.1152/ajpcell.00338.2022] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 08/23/2022] [Accepted: 08/23/2022] [Indexed: 11/22/2022]
Abstract
Intestinal tissue-resident lymphocytes are critical for maintenance of the mucosal barrier and to prevent enteric infections. The activation of these lymphocytes must be tightly regulated to prevent aberrant inflammation and epithelial damage observed in autoimmune diseases, yet also ensure that antimicrobial host defense remains uncompromised. Tissue-resident lymphocytes express CD103, or αE integrin, which dimerizes with the β7 subunit to bind to E-cadherin expressed on epithelial cells. Although the role of CD103 in homing and retention of lymphocytes to and within peripheral tissues has been well characterized, the molecular signals activated following CD103 engagement remain understudied. Here, we highlight recent studies that elucidate the functional contribution of CD103 in various lymphocyte subpopulations, either as an independent signaling molecule or in the context of TCR co-stimulation. Finally, we will discuss the gaps in our understanding of CD103 biology and the therapeutic potential of targeting CD103 on tissue-resident lymphocytes.
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Affiliation(s)
- Weili Xu
- Department of Pathology, Immunology and Laboratory Medicine, Center for Immunity and Inflammation, Rutgers New Jersey Medical School, Newark, New Jersey
| | - Tessa Bergsbaken
- Department of Pathology, Immunology and Laboratory Medicine, Center for Immunity and Inflammation, Rutgers New Jersey Medical School, Newark, New Jersey
| | - Karen L Edelblum
- Department of Pathology, Immunology and Laboratory Medicine, Center for Immunity and Inflammation, Rutgers New Jersey Medical School, Newark, New Jersey
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4
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Wu X, Gu B, Yang H. The role of γδ T cells in the interaction between commensal and pathogenic bacteria in the intestinal mucosa. Int Rev Immunol 2022; 42:379-392. [PMID: 35583374 DOI: 10.1080/08830185.2022.2076846] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 05/03/2022] [Accepted: 05/06/2022] [Indexed: 12/22/2022]
Abstract
The intestinal mucosa is an important structure involved in resistance to pathogen infection. It is mainly composed of four barriers, which have different but interrelated functions. Pathogenic bacteria can damage these intestinal mucosal barriers. Here, we mainly review the mechanisms of pathogen damage to biological barriers. Most γδ T cells are located on the surface of the intestinal mucosa, with the ability to migrate and engage in crosstalk with microorganisms. Commensal bacteria are involved in the activation and migration of γδ T cells to monitor the invasion of pathogens. Pathogen invasion alters the migration pattern of γδ T cells. γδ T cells accelerate pathogen clearance and limit opportunistic invasion of commensal bacteria. By discussing these interactions among γδ T cells, commensal bacteria and pathogenic bacteria, we suggest that γδ T cells may link the interactions between commensal bacteria and pathogenic bacteria.
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Affiliation(s)
- Xiaoxiao Wu
- Xuzhou Key Laboratory of Laboratory Diagnostics, School of Medical Technology, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Bing Gu
- Xuzhou Key Laboratory of Laboratory Diagnostics, School of Medical Technology, Xuzhou Medical University, Xuzhou, Jiangsu, China
- Laboratory Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China
| | - Huan Yang
- Xuzhou Key Laboratory of Laboratory Diagnostics, School of Medical Technology, Xuzhou Medical University, Xuzhou, Jiangsu, China
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5
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Jia L, Wu G, Alonso S, Zhao C, Lemenze A, Lam YY, Zhao L, Edelblum KL. A transmissible γδ intraepithelial lymphocyte hyperproliferative phenotype is associated with the intestinal microbiota and confers protection against acute infection. Mucosal Immunol 2022; 15:772-782. [PMID: 35589986 PMCID: PMC9262869 DOI: 10.1038/s41385-022-00522-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 03/27/2022] [Accepted: 04/20/2022] [Indexed: 02/04/2023]
Abstract
Intraepithelial lymphocytes expressing the γδ T cell receptor (γδ IELs) serve as a first line of defense against luminal microbes. Although the presence of an intact microbiota is dispensable for γδ IEL development, several microbial factors contribute to the maintenance of this sentinel population. However, whether specific commensals influence population of the γδ IEL compartment under homeostatic conditions has yet to be determined. We identified a novel γδ IEL hyperproliferative phenotype that arises early in life and is characterized by expansion of multiple Vγ subsets. Horizontal transfer of this hyperproliferative phenotype to mice harboring a phenotypically normal γδ IEL compartment was prevented following antibiotic treatment, thus demonstrating that the microbiota is both necessary and sufficient for the observed increase in γδ IELs. Further, we identified two guilds of small intestinal or fecal bacteria represented by 12 amplicon sequence variants (ASV) that are strongly associated with γδ IEL expansion. Using intravital microscopy, we find that hyperproliferative γδ IELs also exhibit increased migratory behavior leading to enhanced protection against bacterial infection. These findings reveal that transfer of a specific group of commensals can regulate γδ IEL homeostasis and immune surveillance, which may provide a novel means to reinforce the epithelial barrier.
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Affiliation(s)
- Luo Jia
- Center for Immunity and Inflammation, Department of Pathology, Immunology and Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ
| | - Guojun Wu
- New Jersey Institute for Food, Nutrition & Health, Department of Biochemistry and Microbiology, Rutgers University, New Brunswick, NJ
| | - Sara Alonso
- Center for Immunity and Inflammation, Department of Pathology, Immunology and Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ
| | - Cuiping Zhao
- New Jersey Institute for Food, Nutrition & Health, Department of Biochemistry and Microbiology, Rutgers University, New Brunswick, NJ
| | - Alexander Lemenze
- Center for Immunity and Inflammation, Department of Pathology, Immunology and Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ
| | - Yan Y. Lam
- New Jersey Institute for Food, Nutrition & Health, Department of Biochemistry and Microbiology, Rutgers University, New Brunswick, NJ,Gut Microbiota and Metabolism Group, Centre for Chinese Herbal Medicine Drug Development, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong
| | - Liping Zhao
- New Jersey Institute for Food, Nutrition & Health, Department of Biochemistry and Microbiology, Rutgers University, New Brunswick, NJ
| | - Karen L. Edelblum
- Center for Immunity and Inflammation, Department of Pathology, Immunology and Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ,Correspondence: Karen Edelblum, 205 South Orange Ave, Cancer Center G1228, Newark, NJ 07103, tel: 973-972-3071,
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Li Y, Ma Y, Jin Y, Peng X, Wang X, Zhang P, Liu P, Liang C, Yang Q. Porcine intraepithelial lymphocytes undergo migration and produce an antiviral response following intestinal virus infection. Commun Biol 2022; 5:252. [PMID: 35318455 PMCID: PMC8941121 DOI: 10.1038/s42003-022-03205-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 03/01/2022] [Indexed: 11/27/2022] Open
Abstract
The location of intraepithelial lymphocytes (IELs) between epithelial cells provide a first line of immune defense against enteric infection. It is assumed that IELs migrate only along the basement membrane or into the lateral intercellular space (LIS) between epithelial cells. Here, we identify a unique transepithelial migration of porcine IELs as they move to the free surface of the intestinal epithelia. The major causative agent of neonatal diarrhea in piglets, porcine epidemic diarrhea virus (PEDV), increases the number of IELs entering the LIS and free surface of the intestinal epithelia, driven by chemokine CCL2 secreted from virus-infected intestinal epithelial cells. Remarkably, only virus pre-activated IELs inhibits PEDV infection and their antiviral activity depends on the further activation by virus-infected cells. Although high levels of perforin is detected in the co-culture system, the antiviral function of activated IELs is mainly mediated by IFN-γ secretion inducing robust antiviral response in virus-infected cells. Our results uncover a unique migratory behavior of porcine IELs as well as their protective role in the defense against intestinal infection. When piglets are infected with intestinal virus, porcine intraepithelial lymphocytes undergo intra-and trans-epithelial migration promoted by chemokines from infected epithelial cells and produce an antiviral response.
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Affiliation(s)
- Yuchen Li
- MOE Joint International Research Laboratory of Animal Health and Food Safety, college of veterinary medicine, Nanjing Agricultural University, Weigang 1, Nanjing, Jiangsu, 210095, PR China
| | - Yichao Ma
- MOE Joint International Research Laboratory of Animal Health and Food Safety, college of veterinary medicine, Nanjing Agricultural University, Weigang 1, Nanjing, Jiangsu, 210095, PR China
| | - Yuxin Jin
- MOE Joint International Research Laboratory of Animal Health and Food Safety, college of veterinary medicine, Nanjing Agricultural University, Weigang 1, Nanjing, Jiangsu, 210095, PR China
| | - Xuebin Peng
- MOE Joint International Research Laboratory of Animal Health and Food Safety, college of veterinary medicine, Nanjing Agricultural University, Weigang 1, Nanjing, Jiangsu, 210095, PR China
| | - Xiuyu Wang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, college of veterinary medicine, Nanjing Agricultural University, Weigang 1, Nanjing, Jiangsu, 210095, PR China
| | - Penghao Zhang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, college of veterinary medicine, Nanjing Agricultural University, Weigang 1, Nanjing, Jiangsu, 210095, PR China
| | - Peng Liu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, college of veterinary medicine, Nanjing Agricultural University, Weigang 1, Nanjing, Jiangsu, 210095, PR China
| | - Chun Liang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, college of veterinary medicine, Nanjing Agricultural University, Weigang 1, Nanjing, Jiangsu, 210095, PR China
| | - Qian Yang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, college of veterinary medicine, Nanjing Agricultural University, Weigang 1, Nanjing, Jiangsu, 210095, PR China.
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7
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Hu MD, Golovchenko NB, Burns GL, Nair PM, Kelly TJ, Agos J, Irani MZ, Soh WS, Zeglinski MR, Lemenze A, Bonder EM, Sandrock I, Prinz I, Granville DJ, Keely S, Watson AJ, Edelblum KL. γδ Intraepithelial Lymphocytes Facilitate Pathological Epithelial Cell Shedding Via CD103-Mediated Granzyme Release. Gastroenterology 2022; 162:877-889.e7. [PMID: 34861219 PMCID: PMC8881348 DOI: 10.1053/j.gastro.2021.11.028] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 11/16/2021] [Accepted: 11/19/2021] [Indexed: 12/22/2022]
Abstract
BACKGROUND & AIMS Excessive shedding of apoptotic enterocytes into the intestinal lumen is observed in inflammatory bowel disease and is correlated with disease relapse. Based on their cytolytic capacity and surveillance behavior, we investigated whether intraepithelial lymphocytes expressing the γδ T cell receptor (γδ IELs) are actively involved in the shedding of enterocytes into the lumen. METHODS Intravital microscopy was performed on GFP γδ T cell reporter mice treated with intraperitoneal lipopolysaccharide (10 mg/kg) for 90 minutes to induce tumor necrosis factor-mediated apoptosis. Cell shedding in various knockout or transgenic mice in the presence or absence of blocking antibody was quantified by immunostaining for ZO-1 funnels and cleaved caspase-3 (CC3). Granzyme A and granzyme B release from ex vivo-stimulated γδ IELs was quantified by enzyme-linked immunosorbent assay. Immunostaining for γδ T cell receptor and CC3 was performed on duodenal and ileal biopsies from controls and patients with Crohn's disease. RESULTS Intravital microscopy of lipopolysaccharide-treated mice revealed that γδ IELs make extended contact with shedding enterocytes. These prolonged interactions require CD103 engagement by E-cadherin, and CD103 knockout or blockade significantly reduced lipopolysaccharide-induced shedding. Furthermore, we found that granzymes A and B, but not perforin, are required for cell shedding. These extracellular granzymes are released by γδ IELs both constitutively and after CD103/E-cadherin ligation. Moreover, we found that the frequency of γδ IEL localization to CC3-positive enterocytes is increased in Crohn's disease biopsies compared with healthy controls. CONCLUSIONS Our results uncover a previously unrecognized role for γδ IELs in facilitating tumor necrosis factor-mediated shedding of apoptotic enterocytes via CD103-mediated extracellular granzyme release.
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Affiliation(s)
- Madeleine D. Hu
- Center for Immunity and Inflammation, Department of Pathology, Immunology & Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ, 07103, USA
| | - Natasha B. Golovchenko
- Center for Immunity and Inflammation, Department of Pathology, Immunology & Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ, 07103, USA
| | - Grace L. Burns
- NHMRC Centre of Research Excellence in Digestive Health, College of Health, Medicine and Wellbeing, University of Newcastle, Callaghan, NSW, 2308, Australia; Hunter Medical Research Institute, Lot 1 Kookaburra Circuit, New Lambton Heights, NSW, 2305, Australia
| | - Prema M. Nair
- NHMRC Centre of Research Excellence in Digestive Health, College of Health, Medicine and Wellbeing, University of Newcastle, Callaghan, NSW, 2308, Australia; Hunter Medical Research Institute, Lot 1 Kookaburra Circuit, New Lambton Heights, NSW, 2305, Australia
| | - Thomas J. Kelly
- Center for Immunity and Inflammation, Department of Pathology, Immunology & Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ, 07103, USA
| | - Jonathan Agos
- Center for Immunity and Inflammation, Department of Pathology, Immunology & Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ, 07103, USA
| | - Mudar Zand Irani
- NHMRC Centre of Research Excellence in Digestive Health, College of Health, Medicine and Wellbeing, University of Newcastle, Callaghan, NSW, 2308, Australia; Hunter Medical Research Institute, Lot 1 Kookaburra Circuit, New Lambton Heights, NSW, 2305, Australia
| | - Wai Sinn Soh
- NHMRC Centre of Research Excellence in Digestive Health, College of Health, Medicine and Wellbeing, University of Newcastle, Callaghan, NSW, 2308, Australia; Hunter Medical Research Institute, Lot 1 Kookaburra Circuit, New Lambton Heights, NSW, 2305, Australia
| | - Matthew R. Zeglinski
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, V6T 2B5, Canada
| | - Alexander Lemenze
- Center for Immunity and Inflammation, Department of Pathology, Immunology & Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ, 07103, USA
| | - Edward M. Bonder
- Department of Biological Sciences, Rutgers University – The State University of New Jersey, Newark, NJ, 07102, USA
| | - Inga Sandrock
- Institute of Immunology, Hannover Medical School, Hannover, Germany
| | - Immo Prinz
- Institute of Systems Immunology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - David J. Granville
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, V6T 2B5, Canada
| | - Simon Keely
- NHMRC Centre of Research Excellence in Digestive Health, College of Health, Medicine and Wellbeing, University of Newcastle, Callaghan, NSW, 2308, Australia; Hunter Medical Research Institute, Lot 1 Kookaburra Circuit, New Lambton Heights, NSW, 2305, Australia
| | - Alastair J.M. Watson
- Department of Gastroenterology and Gut Biology, Norwich Medical School, University of East Anglia, Norwich, UK
| | - Karen L. Edelblum
- Center for Immunity and Inflammation, Department of Pathology, Immunology & Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ, 07103, USA
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Li M, Bou-Dargham MJ, Yu J, Etwebi Z, Sun H, Chen YH. TIPE polarity proteins are required for mucosal deployment of T lymphocytes and mucosal defense against bacterial infection. MOLECULAR BIOMEDICINE 2021; 2:41. [PMID: 34939151 PMCID: PMC8695405 DOI: 10.1186/s43556-021-00059-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 11/05/2021] [Indexed: 11/18/2022] Open
Abstract
Mucosal surfaces are continuously exposed to, and challenged by, numerous commensal and pathogenic organisms. To guard against infections, a majority of the thymus-derived T lymphocytes are deployed at the mucosa. Although chemokines are known to be involved in the mucosal lymphocyte deployment, it is not clear whether lymphocytes enter the mucosa through directed migration or enhanced random migration. Here we report that TIPE (tumor necrosis factor-α-induced protein 8 (TNFAIP8)-like) proteins mediate directed migration of T lymphocytes into lung mucosa, and they are crucial for mucosal immune defense against Streptococcus pneumoniae infection. Knockout of both Tnfaip8 and Tipe2, which encode polarity proteins that control the directionality of lymphocyte migration, significantly reduced the numbers of T lymphocytes in the lung of mice. Compared with wild-type mice, Tnfaip8−/−Tipe2−/− mice also developed more severe infection with more pathogens entering blood circulation upon nasal Streptococcus pneumoniae challenge. Single-cell RNA-sequencing analysis revealed that TIPE proteins selectively affected mucosal homing of a unique subpopulation of T cells, called “T cells-2”, which expressed high levels of Ccr9, Tcf7, and Rag1/2 genes. TNFAIP8 and TIPE2 appeared to have overlapping functions since deficiency in both yielded the strongest phenotype. These data demonstrate that TIPE family of proteins are crucial for lung mucosal immunity. Strategies targeting TIPE proteins may help develop mucosal vaccines or treat inflammatory diseases of the lung.
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Liu N, Feng G, Zhang X, Hu Q, Sun S, Sun J, Sun Y, Wang R, Zhang Y, Wang P, Li Y. The Functional Role of Lactoferrin in Intestine Mucosal Immune System and Inflammatory Bowel Disease. Front Nutr 2021; 8:759507. [PMID: 34901112 PMCID: PMC8655231 DOI: 10.3389/fnut.2021.759507] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 10/18/2021] [Indexed: 12/21/2022] Open
Abstract
Inflammatory bowel disease (IBD), encompassing ulcerative colitis (UC) and Crohn's disease (CD), is one of the main types of intestinal inflammatory diseases with intestine mucosal immune disorder. Intestine mucosal immune system plays a remarkable and important role in the etiology and pathogenesis of IBD. Therefore, understanding the intestine mucosal immune mechanism is a key step to develop therapeutic interventions for IBD. Intestine mucosal immune system and IBD are influenced by various factors, such as inflammation, gut permeability, gut microbiota, and nutrients. Among these factors, emerging evidence show that nutrients play a key role in inflammation activation, integrity of intestinal barrier, and immune cell modulation. Lactoferrin (LF), an iron-binding glycoprotein belonging to transferrin family, is a dietary bioactive component abundantly found in mammalian milk. Notably, LF has been reported to perform diverse biological functions including antibacterial activity, anti-inflammatory activity, intestinal barrier protection, and immune cell modulation, and is involved in maintaining intestine mucosal immune homeostasis. The improved understanding of the properties of LF in intestine mucosal immune system and IBD will facilitate its application in nutrition, clinical medicine, and health. Herein, this review outlines the recent advancements on LF as a potential therapeutic intervention for IBD associated with intestine mucosal immune system dysfunction. We hope this review will provide a reference for future studies and lay a theoretical foundation for LF-based therapeutic interventions for IBD by understanding the particular effects of LF on intestine mucosal immune system.
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Affiliation(s)
- Ning Liu
- Key Laboratory of Precision Nutrition and Food Quality, Ministry of Education, Department of Nutrition and Health, China Agricultural University, Beijing, China
- Key Laboratory of Functional Dairy, Ministry of Education, Department of Nutrition and Health, China Agricultural University, Beijing, China
| | - Gang Feng
- Inner Mongolia Yili Industrial Group, Co., Ltd., Hohhot, China
- Yili Maternal & Infant Nutrition Institute, Beijing, China
| | - Xiaoying Zhang
- Inner Mongolia Yili Industrial Group, Co., Ltd., Hohhot, China
- Yili Maternal & Infant Nutrition Institute, Beijing, China
| | - Qingjuan Hu
- Key Laboratory of Precision Nutrition and Food Quality, Ministry of Education, Department of Nutrition and Health, China Agricultural University, Beijing, China
- Key Laboratory of Functional Dairy, Ministry of Education, Department of Nutrition and Health, China Agricultural University, Beijing, China
| | - Shiqiang Sun
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, Groningen, Netherlands
- Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, Netherlands
| | - Jiaqi Sun
- Inner Mongolia Yili Industrial Group, Co., Ltd., Hohhot, China
- Yili Maternal & Infant Nutrition Institute, Beijing, China
| | - Yanan Sun
- Key Laboratory of Precision Nutrition and Food Quality, Ministry of Education, Department of Nutrition and Health, China Agricultural University, Beijing, China
- Key Laboratory of Functional Dairy, Ministry of Education, Department of Nutrition and Health, China Agricultural University, Beijing, China
| | - Ran Wang
- Key Laboratory of Precision Nutrition and Food Quality, Ministry of Education, Department of Nutrition and Health, China Agricultural University, Beijing, China
- Key Laboratory of Functional Dairy, Ministry of Education, Department of Nutrition and Health, China Agricultural University, Beijing, China
| | - Yan Zhang
- Key Laboratory of Precision Nutrition and Food Quality, Ministry of Education, Department of Nutrition and Health, China Agricultural University, Beijing, China
- Key Laboratory of Functional Dairy, Ministry of Education, Department of Nutrition and Health, China Agricultural University, Beijing, China
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, China
| | - Pengjie Wang
- Key Laboratory of Precision Nutrition and Food Quality, Ministry of Education, Department of Nutrition and Health, China Agricultural University, Beijing, China
- Key Laboratory of Functional Dairy, Ministry of Education, Department of Nutrition and Health, China Agricultural University, Beijing, China
| | - Yixuan Li
- Key Laboratory of Precision Nutrition and Food Quality, Ministry of Education, Department of Nutrition and Health, China Agricultural University, Beijing, China
- Key Laboratory of Functional Dairy, Ministry of Education, Department of Nutrition and Health, China Agricultural University, Beijing, China
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10
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Zou J, Liu C, Jiang S, Qian D, Duan J. Cross Talk between Gut Microbiota and Intestinal Mucosal Immunity in the Development of Ulcerative Colitis. Infect Immun 2021; 89:e0001421. [PMID: 33526559 PMCID: PMC8370674 DOI: 10.1128/iai.00014-21] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Ulcerative colitis (UC), a nonspecific inflammatory disease, is characterized by inflammation and mucosal damage in the colon, and its prevalence in the world is increasing. Nevertheless, the exact pathogenesis of UC is still unclear. Accumulating data have suggested that its pathogenesis is multifactorial, involving genetic predisposition, environmental factors, microbial dysbiosis, and dysregulated immune responses. Generally, UC is aroused by inappropriate immune activation based on the interaction of host and intestinal microbiota. The relationship between microbiota and host immune system in the pathogenesis of UC is complicated. However, increasing evidence indicates that the shift of microbiota composition can substantially influence intestinal immunity. In this review, we primarily focus on the delicate balance between microbiota and gut mucosal immunity during UC progression.
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Affiliation(s)
- Junfeng Zou
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing, People’s Republic of China
| | - Chen Liu
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing, People’s Republic of China
| | - Shu Jiang
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing, People’s Republic of China
| | - Dawei Qian
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing, People’s Republic of China
| | - Jinao Duan
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing, People’s Republic of China
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11
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Zimmer CL, von Seth E, Buggert M, Strauss O, Hertwig L, Nguyen S, Wong AYW, Zotter C, Berglin L, Michaëlsson J, Hansson MR, Arnelo U, Sparrelid E, Ellis ECS, Söderholm JD, Keita ÅV, Holm K, Özenci V, Hov JR, Mold JE, Cornillet M, Ponzetta A, Bergquist A, Björkström NK. A biliary immune landscape map of primary sclerosing cholangitis reveals a dominant network of neutrophils and tissue-resident T cells. Sci Transl Med 2021; 13:13/599/eabb3107. [PMID: 34162753 DOI: 10.1126/scitranslmed.abb3107] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 03/13/2021] [Accepted: 05/17/2021] [Indexed: 12/14/2022]
Abstract
The human biliary system, a mucosal barrier tissue connecting the liver and intestine, is an organ often affected by serious inflammatory and malignant diseases. Although these diseases are linked to immunological processes, the biliary system represents an unexplored immunological niche. By combining endoscopy-guided sampling of the biliary tree with a high-dimensional analysis approach, comprehensive mapping of the human biliary immunological landscape in patients with primary sclerosing cholangitis (PSC), a severe biliary inflammatory disease, was conducted. Major differences in immune cell composition in bile ducts compared to blood were revealed. Furthermore, biliary inflammation in patients with PSC was characterized by high presence of neutrophils and T cells as compared to control individuals without PSC. The biliary T cells displayed a CD103+CD69+ effector memory phenotype, a combined gut and liver homing profile, and produced interleukin-17 (IL-17) and IL-22. Biliary neutrophil infiltration in PSC associated with CXCL8, possibly produced by resident T cells, and CXCL16 was linked to the enrichment of T cells. This study uncovers the immunological niche of human bile ducts, defines a local immune network between neutrophils and biliary-resident T cells in PSC, and provides a resource for future studies of the immune responses in biliary disorders.
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Affiliation(s)
- Christine L Zimmer
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, 14152 Stockholm, Sweden
| | - Erik von Seth
- Division of Upper GI Diseases, Karolinska University Hospital, 14157 Stockholm, Sweden.,Unit of Gastroenterology and Rheumatology, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, 14157 Stockholm, Sweden
| | - Marcus Buggert
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, 14152 Stockholm, Sweden
| | - Otto Strauss
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, 14152 Stockholm, Sweden
| | - Laura Hertwig
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, 14152 Stockholm, Sweden
| | - Son Nguyen
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104-6076, USA.,Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Alicia Y W Wong
- Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institutet, 14152 Stockholm, Sweden
| | - Chiara Zotter
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, 14152 Stockholm, Sweden
| | - Lena Berglin
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, 14152 Stockholm, Sweden
| | - Jakob Michaëlsson
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, 14152 Stockholm, Sweden
| | - Marcus Reuterwall Hansson
- Division of Surgery, Department of Clinical Science, Intervention, and Technology, Karolinska Institutet, 14152 Stockholm, Sweden
| | - Urban Arnelo
- Division of Surgery, Department of Clinical Science, Intervention, and Technology, Karolinska Institutet, 14152 Stockholm, Sweden.,Department of Surgical and Perioperative sciences, Surgery, Umeå University, 90187 Umeå, Sweden
| | - Ernesto Sparrelid
- Division of Surgery, Department of Clinical Science, Intervention, and Technology, Karolinska Institutet, 14152 Stockholm, Sweden
| | - Ewa C S Ellis
- Division of Transplantation Surgery, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, 14186 Stockholm, Sweden
| | - Johan D Söderholm
- Department of Biomedical and Clinical Sciences, Linköping University, 58183 Linköping, Sweden.,Department of Surgery, Linköping University Hospital, 58185 Linköping, Sweden
| | - Åsa V Keita
- Department of Biomedical and Clinical Sciences, Linköping University, 58183 Linköping, Sweden
| | - Kristian Holm
- Institute of Clinical Medicine, University of Oslo, 0318 Oslo, Norway.,Norwegian PSC Research Center, Department of Transplantation Medicine, Oslo University Hospital, 0424 Oslo, Norway
| | - Volkan Özenci
- Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institutet, 14152 Stockholm, Sweden
| | - Johannes R Hov
- Institute of Clinical Medicine, University of Oslo, 0318 Oslo, Norway.,Norwegian PSC Research Center, Department of Transplantation Medicine, Oslo University Hospital, 0424 Oslo, Norway.,Section of Gastroenterology, Department of Transplantation Medicine, Oslo University Hospital, 0424 Oslo, Norway.,Research Institute of Internal Medicine, Oslo University Hospital, 0424 Oslo, Norway
| | - Jeff E Mold
- Department of Cell and Molecular Biology, Karolinska Institutet, 17177 Stockholm, Sweden
| | - Martin Cornillet
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, 14152 Stockholm, Sweden
| | - Andrea Ponzetta
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, 14152 Stockholm, Sweden
| | - Annika Bergquist
- Division of Upper GI Diseases, Karolinska University Hospital, 14157 Stockholm, Sweden.,Unit of Gastroenterology and Rheumatology, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, 14157 Stockholm, Sweden
| | - Niklas K Björkström
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, 14152 Stockholm, Sweden.
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12
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Suslov AV, Chairkina E, Shepetovskaya MD, Suslova IS, Khotina VA, Kirichenko TV, Postnov AY. The Neuroimmune Role of Intestinal Microbiota in the Pathogenesis of Cardiovascular Disease. J Clin Med 2021; 10:1995. [PMID: 34066528 PMCID: PMC8124579 DOI: 10.3390/jcm10091995] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 04/19/2021] [Accepted: 05/03/2021] [Indexed: 02/07/2023] Open
Abstract
Currently, a bidirectional relationship between the gut microbiota and the nervous system, which is considered as microbiota-gut-brain axis, is being actively studied. This axis is believed to be a key mechanism in the formation of somatovisceral functions in the human body. The gut microbiota determines the level of activation of the hypothalamic-pituitary system. In particular, the intestinal microbiota is an important source of neuroimmune mediators in the pathogenesis of cardiovascular disease. This review reflects the current state of publications in PubMed and Scopus databases until December 2020 on the mechanisms of formation and participation of neuroimmune mediators associated with gut microbiota in the development of cardiovascular disease.
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Affiliation(s)
- Andrey V. Suslov
- I.M. Sechenov First Moscow State Medical University, Ministry of Health of Russia, 8-2 Trubetskaya Str., 119992 Moscow, Russia; (A.V.S.); (E.C.); (M.D.S.)
| | - Elizaveta Chairkina
- I.M. Sechenov First Moscow State Medical University, Ministry of Health of Russia, 8-2 Trubetskaya Str., 119992 Moscow, Russia; (A.V.S.); (E.C.); (M.D.S.)
| | - Maria D. Shepetovskaya
- I.M. Sechenov First Moscow State Medical University, Ministry of Health of Russia, 8-2 Trubetskaya Str., 119992 Moscow, Russia; (A.V.S.); (E.C.); (M.D.S.)
| | - Irina S. Suslova
- Central State Medical Academy of the Administrative Department of the President of the Russian Federation, 19-1A Marshal Timoshenko Str., 121359 Moscow, Russia;
| | - Victoria A. Khotina
- Research Institute of Human Morphology, 3 Tsyurupy Str., 117418 Moscow, Russia; (V.A.K.); (A.Y.P.)
- Institute of General Pathology and Pathophysiology, 8 Baltiyskaya Str., 125315 Moscow, Russia
| | - Tatiana V. Kirichenko
- Research Institute of Human Morphology, 3 Tsyurupy Str., 117418 Moscow, Russia; (V.A.K.); (A.Y.P.)
- National Medical Research Center of Cardiology, 15A 3-rd Cherepkovskaya Str., 121552 Moscow, Russia
| | - Anton Y. Postnov
- Research Institute of Human Morphology, 3 Tsyurupy Str., 117418 Moscow, Russia; (V.A.K.); (A.Y.P.)
- National Medical Research Center of Cardiology, 15A 3-rd Cherepkovskaya Str., 121552 Moscow, Russia
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13
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Suzuki T, Hayman L, Kilbey A, Edwards J, Coffelt SB. Gut γδ T cells as guardians, disruptors, and instigators of cancer. Immunol Rev 2020; 298:198-217. [PMID: 32840001 DOI: 10.1111/imr.12916] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 07/24/2020] [Accepted: 07/26/2020] [Indexed: 08/17/2023]
Abstract
Colorectal cancer is the third most common cancer worldwide with nearly 2 million cases per year. Immune cells and inflammation are a critical component of colorectal cancer progression, and they are used as reliable prognostic indicators of patient outcome. With the growing appreciation for immunology in colorectal cancer, interest is growing on the role γδ T cells have to play, as they represent one of the most prominent immune cell populations in gut tissue. This group of cells consists of both resident populations-γδ intraepithelial lymphocytes (γδ IELs)-and transient populations that each has unique functions. The homeostatic role of these γδ T cell subsets is to maintain barrier integrity and prevent microorganisms from breaching the mucosal layer, which is accomplished through crosstalk with enterocytes and other immune cells. Recent years have seen a surge in discoveries regarding the regulation of γδ IELs in the intestine and the colon with particular new insights into the butyrophilin family. In this review, we discuss the development, specialities, and functions of γδ T cell subsets during cancer progression. We discuss how these cells may be used to predict patient outcome, as well as how to exploit their behavior for cancer immunotherapy.
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Affiliation(s)
- Toshiyasu Suzuki
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
- Cancer Research UK Beatson Institute, Glasgow, UK
| | - Liam Hayman
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Anna Kilbey
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
- Cancer Research UK Beatson Institute, Glasgow, UK
| | - Joanne Edwards
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Seth B Coffelt
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
- Cancer Research UK Beatson Institute, Glasgow, UK
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14
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Fischer MA, Golovchenko NB, Edelblum KL. γδ T cell migration: Separating trafficking from surveillance behaviors at barrier surfaces. Immunol Rev 2020; 298:165-180. [PMID: 32845516 PMCID: PMC7968450 DOI: 10.1111/imr.12915] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/22/2020] [Accepted: 07/23/2020] [Indexed: 12/23/2022]
Abstract
γδ T cells are found in highest numbers at barrier surfaces throughout the body, including the skin, intestine, lung, gingiva, and uterus. Under homeostatic conditions, γδ T cells provide immune surveillance of the epidermis, intestinal, and oral mucosa, whereas the presence of pathogenic microorganisms in the dermis or lungs elicits a robust γδ17 response to clear the infection. Although T cell migration is most frequently defined in the context of trafficking, analysis of specific migratory behaviors of lymphocytes within the tissue microenvironment can provide valuable insight into their function. Intravital imaging and computational analyses have been used to define "search" behavior associated with conventional αβ T cells; however, based on the known role of γδ T cells as immune sentinels at barrier surfaces and their TCR-independent functions, we put forth the need to classify distinct migratory patterns that reflect the surveillance capacity of these unconventional lymphocytes. This review will focus on how γδ T cells traffic to various barrier surfaces and how recent investigation into their migratory behavior has provided unique insight into the contribution of γδ T cells to barrier immunity.
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Affiliation(s)
- Matthew A. Fischer
- Center for Immunity and Inflammation, Department of Pathology, Immunology & Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ
| | - Natasha B. Golovchenko
- Center for Immunity and Inflammation, Department of Pathology, Immunology & Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ
| | - Karen L. Edelblum
- Center for Immunity and Inflammation, Department of Pathology, Immunology & Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ
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15
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The Influence of Small Intestinal Bacterial Overgrowth in Digestive and Extra-Intestinal Disorders. Int J Mol Sci 2020; 21:ijms21103531. [PMID: 32429454 PMCID: PMC7279035 DOI: 10.3390/ijms21103531] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 05/13/2020] [Accepted: 05/15/2020] [Indexed: 02/07/2023] Open
Abstract
Small intestinal bacterial overgrowth (SIBO) is a condition hallmarked by an increase in the concentration of colonic-type bacteria in the small bowel. Watery diarrhea, bloating, abdominal pain and distension are the most common clinical manifestations. Additionally, malnutrition and vitamin (B12, D, A, and E) as well as minerals (iron and calcium) deficiency may be present. SIBO may mask or worsen the history of some diseases (celiac disease, irritable bowel disease), may be more common in some extra-intestinal disorders (scleroderma, obesity), or could even represent a pathogenetic link with some diseases, in which a perturbation of intestinal microbiota may be involved. On these bases, we performed a review to explore the multiple links between SIBO and digestive and extra-intestinal diseases.
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16
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George MM, Rahman M, Connors J, Stadnyk AW. Opinion: Are Organoids the End of Model Evolution for Studying Host Intestinal Epithelium/Microbe Interactions? Microorganisms 2019; 7:microorganisms7100406. [PMID: 31569537 PMCID: PMC6843211 DOI: 10.3390/microorganisms7100406] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 09/21/2019] [Accepted: 09/27/2019] [Indexed: 12/12/2022] Open
Abstract
In the pursuit to understand intestinal epithelial cell biology in health and disease, researchers have established various model systems, from whole animals (typically rodents) with experimentally induced disease to transformed human carcinomas. The obvious limitation to the ex vivo or in vitro cell systems was enriching, maintaining, and expanding differentiated intestinal epithelial cell types. The popular concession was human and rodent transformed cells of mainly undifferentiated cells, with a few select lines differentiating along the path to becoming goblet cells. Paneth cells, in particular, remained unculturable. The breakthrough came in the last decade with the report of conditions to grow mouse intestinal organoids. Organoids are 3-dimensional ex vivo “mini-organs” of the organ from which the stem cells were derived. Intestinal organoids contain fully differentiated epithelial cells in the same spatial organization as in the native epithelium. The cells are suitably polarized and produce and secrete mucus onto the apical surface. This review introduces intestinal organoids and provide some thoughts on strengths and weaknesses in the application of organoids to further advance our understanding of the intestinal epithelial–microbe relationship.
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Affiliation(s)
- Michelle M George
- Department of Pediatrics, Division of Gastroenterology & Nutrition, Dalhousie University, 5850 University Avenue, Halifax, NS B3K 6R8, Canada.
| | - Mushfiqur Rahman
- Department of Pediatrics, Division of Gastroenterology & Nutrition, Dalhousie University, 5850 University Avenue, Halifax, NS B3K 6R8, Canada.
| | - Jessica Connors
- Department of Pediatrics, Division of Gastroenterology & Nutrition, Dalhousie University, 5850 University Avenue, Halifax, NS B3K 6R8, Canada.
| | - Andrew W Stadnyk
- Department of Pediatrics, Division of Gastroenterology & Nutrition, Dalhousie University, 5850 University Avenue, Halifax, NS B3K 6R8, Canada.
- Department of Microbiology & Immunology, Dalhousie University, 5850 College Street, Halifax, NS B3H 4R2, Canada.
- Department of Pathology, Dalhousie University, 5850 College Street, Halifax, NS B3H 4R2, Canada.
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17
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Effects of force-feeding on immunology, digestive function and oxidative stress in the duodenal and jejunal mucosa of Pekin ducks. Animal 2019; 13:2199-2206. [PMID: 30944048 DOI: 10.1017/s1751731119000612] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Force-feeding was considered as a traditional high-efficiency approach to improve growth performance and accelerate fat deposition of Pekin ducks. However, force-feeding is a serious violation of international advocacy on animal welfare, because it can induce serious injuries to animals, such as damages to the digestive tract, effects on immunity and even severe oxidative stress. Therefore, it is urgent to stop force-feeding. The aim of this study was to determine the effects of force feeding on immune function, digestive function and oxidative stress in the mucosa of duodenum and jejunum of Pekin ducks. A total of 500 ducks were randomly divided into two groups. The control group was allowed to feed freely on a basal diet. The experimental group was force-fed by inserting a plastic feeding tube 8 to 10 inches long down the esophagus for 6 days. Compared with the control group, there was a significant (P<0.05) increase in serum diamine oxidase, d-lactic acid, endotoxin and corticosterone levels in the force-feeding group. The crypt depth in duodenum and jejunum showed significant differences (P<0.05) between the two groups and the intestinal villus epithelium cell was severely damaged in force-feeding group. Similarly, the activities of digestive enzymes as well as the levels of immune function in the duodenal and jejunal mucosa in the force-feeding group were significantly higher than the control group (P<0.05). However, there was a significant decrease in the superoxide dismutase, glutathione peroxidase and catalase levels with a marked increase in malondialdehyde level in duodenal and jejunal mucosa (P<0.05). In summary, at the end of the fattening period with force-feeding for 6 days, Pekin ducks experienced an adverse effect on the integrity of their duodenal and jejunal mucosa epithelium cell as well as their immune function and antioxidant capacity of Pekin ducks but also had improvement in digestive enzyme activities.
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