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García-Hoz C, Crespo L, Pariente R, De Andrés A, Rodríguez-Ramos R, Roy G. Intraepithelial Lymphogram in the Diagnosis of Celiac Disease in Adult Patients: A Validation Cohort. Nutrients 2024; 16:1117. [PMID: 38674808 PMCID: PMC11054949 DOI: 10.3390/nu16081117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/05/2024] [Accepted: 04/08/2024] [Indexed: 04/28/2024] Open
Abstract
BACKGROUND Celiac disease is a gluten-related pathology, highly prevalent and heterogeneous in its clinical presentation, which leads to delays in diagnosis and misdiagnosis. The analysis of duodenal intraepithelial lymphocytes (IELs) by flow cytometry (lymphogram) is emerging as a discriminative tool in the diagnosis of various forms of celiac disease (CD). AIMS The aim of this study was to validate IEL lymphogram performance in the largest adult series to our knowledge, in support of its use as a diagnostic tool and as a biomarker of the dynamic celiac process. METHODS This was a retrospective study including 768 adult patients (217 with active CD, 195 on a gluten-free diet, 15 potential CD patients, and 411 non-celiac controls). The IEL subset cut-off values were established to calculate the diagnostic accuracy of the lymphogram. RESULTS A complete celiac lymphogram profile (≥14% increase in T cell receptor [TCR]γδ IELs and simultaneous ≤4% decrease in surface-negative CD3 [sCD3-] IELs) was strongly associated with active and potential forms in over 80% of the confirmed patients with CD, whereas the remaining patients with CD had partial lymphogram profiles (≥14% increase in TCRγδ or ≤4% decrease in sCD3- IELs), with lower diagnostic certainty. None of these patients had a non-celiac lymphogram. Quantifying the TCRγδ versus sCD3- imbalance as a ratio (≥5) is a discriminative index to discard or suspect CD at diagnosis. CONCLUSIONS We have validated the IEL lymphogram's diagnostic efficiency (79% sensitivity, 98% specificity), with an LR+ accuracy of 36.2. As expected, the increase in TCRγδ IELs is a reliable marker for celiac enteropathy, while changes in sCD3- IEL levels throughout the dynamic CD process are useful biomarkers of mucosal lesions.
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Affiliation(s)
- Carlota García-Hoz
- Department of Immunology, University Hospital Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria, 28034 Madrid, Spain; (R.P.); (A.D.A.); (R.R.-R.); (G.R.)
| | - Laura Crespo
- Department of Gastroenterology, University Hospital Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria, 28034 Madrid, Spain;
| | - Roberto Pariente
- Department of Immunology, University Hospital Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria, 28034 Madrid, Spain; (R.P.); (A.D.A.); (R.R.-R.); (G.R.)
| | - Ana De Andrés
- Department of Immunology, University Hospital Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria, 28034 Madrid, Spain; (R.P.); (A.D.A.); (R.R.-R.); (G.R.)
| | - Rafael Rodríguez-Ramos
- Department of Immunology, University Hospital Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria, 28034 Madrid, Spain; (R.P.); (A.D.A.); (R.R.-R.); (G.R.)
| | - Garbiñe Roy
- Department of Immunology, University Hospital Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria, 28034 Madrid, Spain; (R.P.); (A.D.A.); (R.R.-R.); (G.R.)
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Núñez C, Carrasco A, Corzo M, Pariente R, Esteve M, Roy G. Flow cytometric analysis of duodenal intraepithelial lymphocytes (celiac lymphogram): A diagnostic test for celiac disease. Methods Cell Biol 2023; 179:143-155. [PMID: 37625872 DOI: 10.1016/bs.mcb.2022.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/27/2023]
Abstract
Celiac disease (CD) diagnosis in adults and certain cases of children mainly relies on the assessment of histopathological features in duodenal biopsies. However, none of the histological findings that characterize CD are pathognomonic. This, in addition to the clinical heterogeneity of the disease and the presence of seronegative forms, makes the diagnosis of CD still a challenge. A hallmark of the celiac mucosa is the elevated number of TCRγδ intraepithelial lymphocytes (IEL) in the epithelium, which may remain increased even long after gluten withdrawal. Active disease is also characterized by the decreased CD3- IEL subset. The use of flow cytometry enables a precise cell counting and phenotyping, allowing the ascertainment of both TCRγδ+ and CD3- IEL subsets, what is known as the "IEL lymphogram." Although determination of this lymphogram has become a routine evaluation tool in numerous hospitals, standardization of the technical method will guarantee an accurate performance in order to become a pivotal technique for CD diagnosis. Here we describe the protocol to process duodenal biopsies in order to obtain the IELs from the mucosa and to characterize lymphocyte populations by flow cytometry to obtain the IEL lymphogram.
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Affiliation(s)
- Concepción Núñez
- Laboratorio de Investigación en Genética de enfermedades complejas, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain.
| | - A Carrasco
- Department of Gastroenterology, Hospital Universitari Mútua Terrassa, Centro de Investigación Biomédica en Red de Enfermedades Hepática y Digestivas (CIBERehd), Barcelona, Spain
| | - María Corzo
- Laboratorio de Investigación en Genética de enfermedades complejas, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain
| | - R Pariente
- Servicio de Inmunología, Hospital Universitario Ramón y Cajal, IRYCIS, Madrid, Spain
| | - M Esteve
- Department of Gastroenterology, Hospital Universitari Mútua Terrassa, Centro de Investigación Biomédica en Red de Enfermedades Hepática y Digestivas (CIBERehd), Barcelona, Spain
| | - G Roy
- Servicio de Inmunología, Hospital Universitario Ramón y Cajal, IRYCIS, Madrid, Spain
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Camarero C, De Andrés A, García-Hoz C, Roldán B, Muriel A, León F, Roy G. Assessment of Duodenal Intraepithelial Lymphocyte Composition (Lymphogram) for Accurate and Prompt Diagnosis of Celiac Disease in Pediatric Patients. Clin Transl Gastroenterol 2021; 12:e00426. [PMID: 34757327 PMCID: PMC8585297 DOI: 10.14309/ctg.0000000000000426] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 09/23/2021] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION Quantitative and phenotypic analyses of duodenal intraepithelial lymphocytes (IELs) by flow cytometry (IEL lymphogram) confer specificity and enable the diagnosis even in unconventional presentations of celiac disease (CD). To evaluate the validity of the IEL lymphograms in the pediatric population for new insights into their use as biomarkers in the natural history of CD. METHODS We retrospectively included 1,211 children (602 with active CD, 92 on a gluten-free diet, 47 with potential CD, and 470 nonceliac controls) who required duodenal biopsies in this study. The cutoff values for IEL subsets were established to calculate the probability of disease according to the lymphogram. RESULTS A celiac lymphogram (a ≥15% increase in gamma-delta T-cell receptor IELs and a simultaneous ≤6% decrease in CD3 surface-negative [sCD3-]) IELs was strongly associated with the diagnosis of active CD, which was present in 89.7% of the confirmed patients. The remaining 10% of the celiac patients had a partial celiac lymphogram (≥15% increase gamma-delta T-cell receptor IELs or ≤6% decrease in sCD3- IELs), with lower diagnostic certainty. On a gluten-free diet, nearly 20% of the patients were indistinguishable from nonceliac subjects based on the lymphogram. In potential CD, a decrease in sCD3- IELs was a risk marker of progression to villous atrophy and a diagnosis of active CD. DISCUSSION If a biopsy is clinically indicated, the IEL lymphogram adds specificity to the histological findings, reducing diagnostic delays and misdiagnoses. The lymphogram is useful for monitoring the natural progression of the disease and predicting the transition from potential celiac to overt CD.
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Affiliation(s)
- Cristina Camarero
- Department of Pediatric Gastroenterology, University Hospital Ramón y Cajal, University of Alcal, Madrid, Spain;
| | - Ana De Andrés
- Department of Immunology, University Hospital Ramón y Cajal, IRYCIS Madrid, Spain;
| | - Carlota García-Hoz
- Department of Immunology, University Hospital Ramón y Cajal, IRYCIS Madrid, Spain;
| | - Belén Roldán
- Department of Pediatric Gastroenterology, University Hospital Ramón y Cajal, University of Alcal, Madrid, Spain;
| | - Alfonso Muriel
- Clinical Biostatistic Unit, University Hospital Ramón y Cajal IRYCIS, CIBERESP Nursing and Physiotherapy Department, University of Alcalá, Madrid, Spain;
| | | | - Garbiñe Roy
- Department of Immunology, University Hospital Ramón y Cajal, IRYCIS Madrid, Spain;
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Cellular and molecular bases of refractory celiac disease. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2021; 358:207-240. [PMID: 33707055 DOI: 10.1016/bs.ircmb.2020.12.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Refractory celiac disease (RCD) encompasses biologically heterogeneous disorders that develop in a small proportion (0.3%) of individuals with celiac disease that are associated with high morbidity. Two broad categories are currently recognized, type I (RCD I) and type II (RCD II), based on immunophenotypic and molecular features of the intraepithelial lymphocytes (IELs). RCD I is characterized by a polyclonal expansion of IELs displaying a normal immunophenotype, while RCD II represents a clonal proliferation of immunophenotypically "aberrant" IELs, and is considered a low-grade lymphoproliferative disorder. The pathogenesis of RCD I has not been clarified, but limited studies suggest multifactorial etiology. On the other hand, recent immunologic, molecular and immunophenotypic analyses have proposed lineage-negative innate IELs to be the cell of origin of a proportion of RCD II cases. Furthermore, sequencing studies have identified frequent, recurrent, activating mutations in members of the JAK-STAT pathway in RCD II. This finding, in conjunction with prior in vitro experimental observations, suggests roles of deregulated cytokine signaling in disease pathogenesis. In this review, we describe current understanding of environmental, immune and genetic factors associated with the development of RCD and briefly discuss diagnostic and therapeutic considerations.
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Meijerink N, van Haarlem DA, Velkers FC, Stegeman AJ, Rutten VPMG, Jansen CA. Analysis of chicken intestinal natural killer cells, a major IEL subset during embryonic and early life. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2021; 114:103857. [PMID: 32891731 DOI: 10.1016/j.dci.2020.103857] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 08/28/2020] [Accepted: 08/28/2020] [Indexed: 06/11/2023]
Abstract
Restrictions on antimicrobials demand alternative strategies to improve broiler health, such as supplying feed additives which stimulate innate immune cells like natural killer (NK) cells. The main objective of this study was to characterize intestinal NK cells in broiler chickens during embryonic and early life and compare these to NK cells in spleen, blood and bone marrow. Also T-cell subsets were determined. The majority of intestinal NK cells expressed IL-2Rα rather than 20E5 and 5C7, and showed low level of activation. Within intestinal NK cells the activation marker CD107 was mostly expressed on IL-2Rα+ cells while in spleen and blood 20E5+ NK cells primarily expressed CD107. High percentages of intestinal CD8αα+, CD8αβ+ and from 2 weeks onward also gamma delta T cells were found. Taken together, we observed several intestinal NK subsets in broiler chickens. Differences in NK subsets were mostly observed between organs, rather than differences over time. Targeting these intestinal NK subsets may be a strategy to improve immune-mediated resistance in broiler chickens.
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Affiliation(s)
- Nathalie Meijerink
- Department Biomolecular Health Sciences, Division Infectious Diseases and Immunology, Yalelaan 1, 3584, CL, the Netherlands.
| | - Daphne A van Haarlem
- Department Biomolecular Health Sciences, Division Infectious Diseases and Immunology, Yalelaan 1, 3584, CL, the Netherlands.
| | - Francisca C Velkers
- Department Population Health Sciences, Division Farm Animal Health, Yalelaan 7, 3584, CL, the Netherlands; Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands.
| | - Arjan J Stegeman
- Department Population Health Sciences, Division Farm Animal Health, Yalelaan 7, 3584, CL, the Netherlands; Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands.
| | - Victor P M G Rutten
- Department Biomolecular Health Sciences, Division Infectious Diseases and Immunology, Yalelaan 1, 3584, CL, the Netherlands; Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa.
| | - Christine A Jansen
- Department Biomolecular Health Sciences, Division Infectious Diseases and Immunology, Yalelaan 1, 3584, CL, the Netherlands.
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Yu X, Vargas J, Green PH, Bhagat G. Innate Lymphoid Cells and Celiac Disease: Current Perspective. Cell Mol Gastroenterol Hepatol 2020; 11:803-814. [PMID: 33309944 PMCID: PMC7851184 DOI: 10.1016/j.jcmgh.2020.12.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 12/03/2020] [Accepted: 12/04/2020] [Indexed: 12/15/2022]
Abstract
Celiac disease (CD) is a common autoimmune disorder triggered by the ingestion of gluten in genetically susceptible individuals. Although the mechanisms underlying gliadin-mediated activation of adaptive immunity in CD have been well-characterized, regulation of innate immune responses and the functions of certain immune cell populations within the epithelium and lamina propria are not well-understood at present. Innate lymphoid cells (ILCs) are types of innate immune cells that have lymphoid morphology, lack antigen-specific receptors, and play important roles in tissue homeostasis, inflammation, and protective immune responses against pathogens. Information regarding the diversity and functions of ILCs in lymphoid organs and at mucosal sites has grown over the past decade, and roles of different ILC subsets in the pathogenesis of some inflammatory intestinal diseases have been proposed. However, our understanding of the contribution of ILCs toward the initiation and progression of CD is still limited. In this review, we discuss current pathophysiological aspects of ILCs within the gastrointestinal tract, findings of recent investigations characterizing ILC alterations in CD and refractory CD, and suggest avenues for future research.
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Affiliation(s)
- Xuechen Yu
- Department of Medicine, Celiac Disease Center, Columbia University Irving Medical Center, New York, New York
| | - Justin Vargas
- Department of Medicine, Celiac Disease Center, Columbia University Irving Medical Center, New York, New York
| | - Peter H.R. Green
- Department of Medicine, Celiac Disease Center, Columbia University Irving Medical Center, New York, New York
| | - Govind Bhagat
- Department of Medicine, Celiac Disease Center, Columbia University Irving Medical Center, New York, New York,Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, New York,Correspondence Address correspondence to: Govind Bhagat, MD, Department of Pathology and Cell Biology, Columbia University Irving Medical Center, 630 West 168th Street, VC 14-228, New York, New York 10032. fax: (212) 305-2301.
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Manickam C, Sugawara S, Reeves RK. Friends or foes? The knowns and unknowns of natural killer cell biology in COVID-19 and other coronaviruses in July 2020. PLoS Pathog 2020; 16:e1008820. [PMID: 32845937 PMCID: PMC7449465 DOI: 10.1371/journal.ppat.1008820] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The COVID-19 pandemic has caused more than 575,000 deaths worldwide as of mid-July 2020 and still continues globally unabated. Immune dysfunction and cytokine storm complicate the disease, which in turn leads to the question of whether stimulation or suppression of the immune system would curb the disease. Given the varied antiviral and regulatory functions of natural killer (NK) cells, they could be potent and powerful immune allies in this global fight against COVID-19. Unfortunately, there is somewhat limited knowledge of the role of NK cells in SARS-CoV-2 infections and even in the related SARS-CoV-1 and MERS-CoV infections. Several NK cell therapeutic options already exist in the treatment of tumor and other viral diseases and could be repurposed against COVID-19. In this review, we describe the current understanding and potential roles of NK cells and other Fc receptor (FcR) effector cells in SARS-CoV-2 infection, advantages of using animals to model COVID-19, and NK cell-based therapeutics that are being investigated for COVID-19 therapy.
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Affiliation(s)
- Cordelia Manickam
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Sho Sugawara
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - R. Keith Reeves
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
- Ragon Institute of Massachusetts General Hospital, MIT, and Harvard, Cambridge, Massachusetts, United States of America
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Uhde M, Yu X, Bunin A, Brauner C, Lewis SK, Lebwohl B, Krishnareddy S, Alaedini A, Reizis B, Ghosh S, Green PH, Bhagat G. Phenotypic shift of small intestinal intra-epithelial type 1 innate lymphoid cells in celiac disease is associated with enhanced cytotoxic potential. Clin Exp Immunol 2020; 200:163-175. [PMID: 31907928 DOI: 10.1111/cei.13414] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/27/2019] [Indexed: 12/17/2022] Open
Abstract
The small intestinal (SI) epithelium harbors a heterogeneous population of lymphocytes that mediate mucosal damage and repair in celiac disease (CD). The composition and roles of human proximal SI intra-epithelial innate lymphoid cells (ILCs), and their alterations in CD, are not well understood. We report that duodenal intra-epithelial ILCs predominantly consist of natural killer (NK)p44+ CD127- cytotoxic ILC1s and NKp44- CD127+ helper ILC1s, while ILC3s only represent a minor population. In patients with newly diagnosed or active CD (ACD) and refractory CD type 1 (RCD I), the frequency of SI NKp44+ ILCs is decreased, with restoration of NKp44+ ILC frequency observed in patients adhering to a gluten-free diet who show evidence of mucosal healing. Moreover, the frequency of SI NKp44- ILCs is increased in ACD and RCD I patients and correlates with the severity of villous atrophy and epithelial damage, as assessed by serum levels of fatty acid binding protein 2 (FABP2). We show that the ILC alterations in CD represent a phenotypic shift of cytotoxic ILC1s rather than an increase in helper ILC1s or transdifferentiation of ILC1s to ILC3s, and activation-induced loss of NKp44 by cytotoxic ILC1s is associated with increased interferon (IFN)-γ expression and release of lytic granules. These findings suggest that intra-epithelial NKp44- CD127- cytotoxic ILC1s may contribute to mucosal damage in CD.
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Affiliation(s)
- M Uhde
- Department of Medicine, Celiac Disease Center, Columbia University Irving Medical Center, New York, NY, USA
| | - X Yu
- Department of Medicine, Celiac Disease Center, Columbia University Irving Medical Center, New York, NY, USA
| | - A Bunin
- Department of Medicine, Celiac Disease Center, Columbia University Irving Medical Center, New York, NY, USA
| | - C Brauner
- Department of Medicine, Celiac Disease Center, Columbia University Irving Medical Center, New York, NY, USA
| | - S K Lewis
- Department of Medicine, Celiac Disease Center, Columbia University Irving Medical Center, New York, NY, USA
| | - B Lebwohl
- Department of Medicine, Celiac Disease Center, Columbia University Irving Medical Center, New York, NY, USA
| | - S Krishnareddy
- Department of Medicine, Celiac Disease Center, Columbia University Irving Medical Center, New York, NY, USA
| | - A Alaedini
- Department of Medicine, Celiac Disease Center, Columbia University Irving Medical Center, New York, NY, USA.,Institute of Human Nutrition, Columbia University Irving Medical Center, New York, NY, USA
| | - B Reizis
- Department of Pathology, Department of Medicine, New York University Langone Medical Center, New York, NY, USA
| | - S Ghosh
- Department of Microbiology and Immunology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - P H Green
- Department of Medicine, Celiac Disease Center, Columbia University Irving Medical Center, New York, NY, USA
| | - G Bhagat
- Department of Medicine, Celiac Disease Center, Columbia University Irving Medical Center, New York, NY, USA.,Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY, USA
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Soderquist CR, Bhagat G. Gastrointestinal T- and NK-cell lymphomas and indolent lymphoproliferative disorders. Semin Diagn Pathol 2020; 37:11-23. [DOI: 10.1053/j.semdp.2019.08.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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10
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Fernández-Bañares F, Carrasco A, Martín A, Esteve M. Systematic Review and Meta-Analysis: Accuracy of Both Gamma Delta+ Intraepithelial Lymphocytes and Coeliac Lymphogram Evaluated by Flow Cytometry for Coeliac Disease Diagnosis. Nutrients 2019; 11:E1992. [PMID: 31443602 PMCID: PMC6769802 DOI: 10.3390/nu11091992] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 08/12/2019] [Accepted: 08/19/2019] [Indexed: 12/27/2022] Open
Abstract
It has been suggested that in doubtful cases of coeliac disease, a high CD3+ T-cell receptor gamma delta+ (TCRγδ+) intraepithelial lymphocyte count increases the likelihood of coeliac disease. AIM To evaluate the diagnostic accuracy of both an isolated increase of TCRγδ+ cells and a coeliac lymphogram (increase of TCRγδ+ plus decrease of CD3- intraepithelial lymphocytes) evaluated by flow cytometry in the diagnosis of coeliac disease. METHODS The literature search was conducted in MEDLINE and EMBASE. The inclusion criteria were: an article that allows for the construction of a 2 × 2 table of true and false positive and true and false negative values. A diagnostic accuracy test meta-analysis was performed. RESULTS The search provided 49 relevant citations, of which 6 were selected for the analysis, which represented 519 patients and 440 controls. Coeliac lymphogram: The pooled S and Sp were 93% and 98%, without heterogeneity. The area under the SROC curve (AUC) was 0.98 (95% CI, 0.97-0.99). TCRγδ+: Pooled S and Sp were both 95%, with significant heterogeneity. The AUC was 0.97 (95% CI, 0.95-0.98). Conclusions: Both TCRγδ+ count and coeliac lymphogram assessed by flow cytometry in duodenal mucosal samples are associated with a high level of diagnostic accuracy for and against coeliac disease.
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Affiliation(s)
- Fernando Fernández-Bañares
- Department of Gastroenterology, Hospital Universitari Mutua Terrassa, 08221 Terrassa (Barcelona), Spain.
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, 28029 Madrid, Spain.
| | - Ana Carrasco
- Department of Gastroenterology, Hospital Universitari Mutua Terrassa, 08221 Terrassa (Barcelona), Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Albert Martín
- Department of Gastroenterology, Hospital Universitari Mutua Terrassa, 08221 Terrassa (Barcelona), Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Maria Esteve
- Department of Gastroenterology, Hospital Universitari Mutua Terrassa, 08221 Terrassa (Barcelona), Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, 28029 Madrid, Spain
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11
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Poggi A, Benelli R, Venè R, Costa D, Ferrari N, Tosetti F, Zocchi MR. Human Gut-Associated Natural Killer Cells in Health and Disease. Front Immunol 2019; 10:961. [PMID: 31130953 PMCID: PMC6509241 DOI: 10.3389/fimmu.2019.00961] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Accepted: 04/15/2019] [Indexed: 12/14/2022] Open
Abstract
It is well established that natural killer (NK) cells are involved in both innate and adaptive immunity. Indeed, they can recognize molecules induced at the cell surface by stress signals and virus infections. The functions of NK cells in the gut are much more complex. Gut NK cells are not precisely organized in lymphoid aggregates but rather scattered in the epithelium or in the stroma, where they come in contact with a multitude of antigens derived from commensal or pathogenic microorganisms in addition to components of microbiota. Furthermore, NK cells in the bowel interact with several cell types, including epithelial cells, fibroblasts, macrophages, dendritic cells, and T lymphocytes, and contribute to the maintenance of immune homeostasis and development of efficient immune responses. NK cells have a key role in the response to intestinal bacterial infections, primarily through production of IFNγ, which can stimulate recruitment of additional NK cells from peripheral blood leading to amplification of the anti-bacterial immune response. Additionally, NK cells can have a role in the pathogenesis of gut autoimmune inflammatory bowel diseases (IBDs), such as Crohn's Disease and Ulcerative Colitis. These diseases are considered relevant to the generation of gastrointestinal malignancies. Indeed, the role of gut-associated NK cells in the immune response to bowel cancers is known. Thus, in the gut immune system, NK cells play a dual role, participating in both physiological and pathogenic processes. In this review, we will analyze the known functions of NK cells in the gut mucosa both in health and disease, focusing on the cross-talk among bowel microenvironment, epithelial barrier integrity, microbiota, and NK cells.
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Affiliation(s)
- Alessandro Poggi
- Molecular Oncology and Angiogenesis Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Roberto Benelli
- Immunology Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Roberta Venè
- Molecular Oncology and Angiogenesis Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Delfina Costa
- Molecular Oncology and Angiogenesis Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Nicoletta Ferrari
- Molecular Oncology and Angiogenesis Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Francesca Tosetti
- Molecular Oncology and Angiogenesis Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Maria Raffaella Zocchi
- Division of Immunology, Transplantation and Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy
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12
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Van Kaer L, Olivares-Villagómez D. Development, Homeostasis, and Functions of Intestinal Intraepithelial Lymphocytes. THE JOURNAL OF IMMUNOLOGY 2019; 200:2235-2244. [PMID: 29555677 PMCID: PMC5863587 DOI: 10.4049/jimmunol.1701704] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 01/25/2018] [Indexed: 12/13/2022]
Abstract
The intestine is continuously exposed to commensal microorganisms, food, and environmental agents and also serves as a major portal of entry for many pathogens. A critical defense mechanism against microbial invasion in the intestine is the single layer of epithelial cells that separates the gut lumen from the underlying tissues. The barrier function of the intestinal epithelium is supported by cells and soluble factors of the intestinal immune system. Chief among them are intestinal intraepithelial lymphocytes (iIELs), which are embedded in the intestinal epithelium and represent one of the single largest populations of lymphocytes in the body. Compared with lymphocytes in other parts of the body, iIELs exhibit unique phenotypic, developmental, and functional properties that reflect their key roles in maintaining the intestinal epithelial barrier. In this article, we review the biology of iIELs in supporting normal health and how their dysregulation can contribute to disease.
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Affiliation(s)
- Luc Van Kaer
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, TN 37232
| | - Danyvid Olivares-Villagómez
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, TN 37232
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13
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Fuchs S, Sawas N, Staedler N, Schubert DA, D'Andrea A, Zeiser R, Piali L, Hruz P, Frei AP. High-dimensional single-cell proteomics analysis identifies immune checkpoint signatures and therapeutic targets in ulcerative colitis. Eur J Immunol 2019; 49:462-475. [PMID: 30578679 DOI: 10.1002/eji.201847862] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 11/26/2018] [Accepted: 12/20/2018] [Indexed: 12/12/2022]
Abstract
Immune checkpoints are regulators of immune cells and play key roles in the modulation of immune responses. The role of checkpoints in autoimmune disease is poorly understood but likely to be central since checkpoint inhibition during cancer treatment can cause autoimmunity. We generated a high-dimensional single-cell proteomics data set from PBMCs of healthy individuals and patients with ulcerative colitis (UC) by mass cytometry, enabling systems-wide analyses of immune cell frequencies and cell type-specific expression patterns of 12 immune checkpoints. Subtle but significant changes in immune cell frequencies and checkpoint expression were observed between UC patients on different treatment regimens and between patients and healthy controls. Most strikingly, UC patients showed a reduced number of peripheral NK-cells and those cells showed an altered phenotype including increased TIGIT expression. Based on these results, we modulated NK-cell function ex vivo through targeting of TIGIT pathway members. In summary, we describe a pattern of changes in immune cell abundance and checkpoint expression as a basis for UC patient stratification and we show modulation of a corresponding immune cell subset through checkpoint targeting. Our approach can be used for the identification of pathogenic immune cell subsets and guide target selection in autoimmunity and chronic inflammation.
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Affiliation(s)
- Sebastian Fuchs
- Roche Pharma Research and Early Development, Immunology, Inflammation and Infectious Diseases (I3) Discovery and Translational Area, Roche Innovation Center Basel, Basel, Switzerland
| | - Nadia Sawas
- Roche Pharma Research and Early Development, Immunology, Inflammation and Infectious Diseases (I3) Discovery and Translational Area, Roche Innovation Center Basel, Basel, Switzerland
| | - Nicolas Staedler
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, BiOmics, Roche Innovation Center Basel, Basel, Switzerland
| | - David A Schubert
- Roche Pharma Research and Early Development, Immunology, Inflammation and Infectious Diseases (I3) Discovery and Translational Area, Roche Innovation Center Basel, Basel, Switzerland
| | - Annalisa D'Andrea
- Roche Pharma Research and Early Development, Immunology, Inflammation and Infectious Diseases (I3) Discovery and Translational Area, Roche Innovation Center Basel, Basel, Switzerland
| | - Robert Zeiser
- Department of Hematology, Oncology and Stem Cell Transplantation, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Luca Piali
- Roche Pharma Research and Early Development, Immunology, Inflammation and Infectious Diseases (I3) Discovery and Translational Area, Roche Innovation Center Basel, Basel, Switzerland
| | - Petr Hruz
- Department of Gastroenterology, University Hospital, Basel, Switzerland
| | - Andreas P Frei
- Roche Pharma Research and Early Development, Immunology, Inflammation and Infectious Diseases (I3) Discovery and Translational Area, Roche Innovation Center Basel, Basel, Switzerland
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14
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Chander U, Leeman-Neill RJ, Bhagat G. Pathogenesis of Enteropathy-Associated T Cell Lymphoma. Curr Hematol Malig Rep 2018; 13:308-317. [PMID: 29943210 DOI: 10.1007/s11899-018-0459-5] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE OF REVIEW To provide an update on the pathogenesis of enteropathy-associated T cell lymphoma (EATL) and its relationship with refractory celiac disease (RCD), in light of current knowledge of immune, genetic, and environmental factors that promote neoplastic transformation of intraepithelial lymphocytes (IELs). RECENT FINDINGS EATL frequently evolves from RCD type II (RCD II) but can occur "de novo" in individuals with celiac disease. Recurrent activating mutations in members of the JAK/STAT pathway have been recently described in EATL and RCD II, which suggests deregulation of cytokine signaling to be an early event in lymphomagenesis. Intraepithelial T cells are presumed to be the cell of origin of EATL (and RCD II). Recent in vitro molecular and phenotypic analyses and in vivo murine studies, however, suggest an origin of RCD II from innate IELs (NK/T cell precursors), which could also be the cell of origin of RCD II-derived EATL. The immune microenvironment of the small intestinal mucosa in celiac disease fosters the development of EATL, often in a multistep pathway.
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Affiliation(s)
- Udit Chander
- Department of Pathology and Cell Biology, Columbia University Medical Center, 630 West 168th Street, New York, NY, 10032, USA
| | - Rebecca J Leeman-Neill
- Department of Pathology and Cell Biology, Columbia University Medical Center, 630 West 168th Street, New York, NY, 10032, USA
| | - Govind Bhagat
- Department of Pathology and Cell Biology, Columbia University Medical Center, 630 West 168th Street, New York, NY, 10032, USA.
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15
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Lutter L, Hoytema van Konijnenburg DP, Brand EC, Oldenburg B, van Wijk F. The elusive case of human intraepithelial T cells in gut homeostasis and inflammation. Nat Rev Gastroenterol Hepatol 2018; 15:637-649. [PMID: 29973676 DOI: 10.1038/s41575-018-0039-0] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The epithelial barrier of the gastrointestinal tract is home to numerous intraepithelial T cells (IETs). IETs are functionally adapted to the mucosal environment and are among the first adaptive immune cells to encounter microbial and dietary antigens. They possess hallmark features of tissue-resident T cells: they are long-lived nonmigratory cells capable of rapidly responding to antigen challenges independent of T cell recruitment from the periphery. Gut-resident T cells have been implicated in the relapsing and remitting course and persisting low-grade inflammation of chronic gastrointestinal diseases, including IBD and coeliac disease. So far, most data IETs have been derived from experimental animal models; however, IETs and the environmental makeup differ between mice and humans. With advances in techniques, the number of human studies has grown exponentially in the past 5 years. Here, we review the literature on the involvement of human IETs in gut homeostasis and inflammation, and how these cells are influenced by the microbiota and dietary antigens. Finally, targeting of IETs in therapeutic interventions is discussed. Broad insight into the function and role of human IETs in gut homeostasis and inflammation is essential to identify future diagnostic, prognostic and therapeutic strategies.
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Affiliation(s)
- Lisanne Lutter
- Laboratory of Translational Immunology, Department of Pediatric Immunology, University Medical Center Utrecht, Utrecht, Netherlands.,Department of Gastroenterology and Hepatology, University Medical Center Utrecht, Utrecht, Netherlands
| | - David P Hoytema van Konijnenburg
- Laboratory of Translational Immunology, Department of Pediatric Immunology, University Medical Center Utrecht, Utrecht, Netherlands.,Laboratory of Mucosal Immunology, The Rockefeller University, New York, NY, USA
| | - Eelco C Brand
- Laboratory of Translational Immunology, Department of Pediatric Immunology, University Medical Center Utrecht, Utrecht, Netherlands.,Department of Gastroenterology and Hepatology, University Medical Center Utrecht, Utrecht, Netherlands
| | - Bas Oldenburg
- Department of Gastroenterology and Hepatology, University Medical Center Utrecht, Utrecht, Netherlands
| | - Femke van Wijk
- Laboratory of Translational Immunology, Department of Pediatric Immunology, University Medical Center Utrecht, Utrecht, Netherlands.
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16
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Olivares-Villagómez D, Van Kaer L. Intestinal Intraepithelial Lymphocytes: Sentinels of the Mucosal Barrier. Trends Immunol 2018; 39:264-275. [PMID: 29221933 PMCID: PMC8056148 DOI: 10.1016/j.it.2017.11.003] [Citation(s) in RCA: 161] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 11/14/2017] [Accepted: 11/15/2017] [Indexed: 02/06/2023]
Abstract
Intestinal intraepithelial lymphocytes (IELs) are a large and diverse population of lymphoid cells that reside between the intestinal epithelial cells (IECs) that form the intestinal mucosal barrier. Although IEL biology has traditionally focused on T cells, recent studies have identified several subsets of T cell receptor (TCR)-negative IELs with intriguing properties. New insight into the development, homeostasis, and functions of distinct IEL subsets has recently been provided. Additional studies have revealed intricate interactions between different IEL subsets, reciprocal interactions between IELs and IECs, and communication of IELs with immune cells that reside outside the intestinal epithelium. We review here sentinel functions of IELs in the maintenance of the mucosal barrier integrity, as well as how dysregulated IEL responses can contribute to pathology.
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Affiliation(s)
- Danyvid Olivares-Villagómez
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, TN, USA.
| | - Luc Van Kaer
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, TN, USA.
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17
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Sennepin A, Real F, Duvivier M, Ganor Y, Henry S, Damotte D, Revol M, Cristofari S, Bomsel M. The Human Penis Is a Genuine Immunological Effector Site. Front Immunol 2017; 8:1732. [PMID: 29312291 PMCID: PMC5735067 DOI: 10.3389/fimmu.2017.01732] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Accepted: 11/23/2017] [Indexed: 12/28/2022] Open
Abstract
The human penis is a main portal of entry for numerous pathogens, and vaccines able to control resulting infections locally are highly desirable. However, in contrast to the gastrointestinal or vaginal mucosa, the penile immune system and mechanisms inducing a penile immune response remain elusive. In this descriptive study, using multiparametric flow cytometry and immunohistochemistry, we characterized mucosal immune cells such as B, T, and natural killer (NK) cells from the urethra, fossa, and glans of human adult penile tissues. We show that memory B lymphocytes and CD138+ plasma cells are detected in all penile compartments. CD4+ and CD8+ T lymphocytes reside in the epithelium and lamina propria of the penile regions and have mostly a resting memory phenotype. All penile regions contain CD56dim NK cells surface expressing the natural cytotoxicity receptor NKp44 and the antibody-dependent cell cytotoxicity receptor CD16. These cells are also able to spontaneously secrete pro- and anti-inflammatory cytokines, such as IL-17 and IL-22. Finally, CCR10 is the main homing receptor detected in these penile cells although, together with CCR3, CCR6, and CCR9, their expression level differs between penile compartments. Unlike antigen-presenting cells which type differ between penile regions as we reported earlier, urethral, fossa, and glans content in immune B, T, and NK cells is comparable. However, median values per each analysis suggest that the glans, containing higher number and more activated NK cells together with higher number of terminally differentiate effector CD8+ T cells, is a superior effector site than the urethra and the fossa. Thus, the human penis is an immunologically active tissue containing the cellular machinery required to induce and produce a specific and effective response against mucosal pathogens. It can therefore be considered as a classic mucosal effector site, a feature that must be taken into account for the elaboration of efficient strategies, including vaccines, against sexually transmitted infections.
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Affiliation(s)
- Alexis Sennepin
- Laboratory of Mucosal Entry of HIV-1 and Mucosal Immunity, Department of Infection, Immunity and Inflammation, Cochin Institute, INSERM, Paris, France.,CNRS, UMR8104, Paris, France.,Paris Descartes University, Sorbonne Paris Cité, Paris, France
| | - Fernando Real
- Laboratory of Mucosal Entry of HIV-1 and Mucosal Immunity, Department of Infection, Immunity and Inflammation, Cochin Institute, INSERM, Paris, France.,CNRS, UMR8104, Paris, France.,Paris Descartes University, Sorbonne Paris Cité, Paris, France
| | - Marine Duvivier
- Laboratory of Mucosal Entry of HIV-1 and Mucosal Immunity, Department of Infection, Immunity and Inflammation, Cochin Institute, INSERM, Paris, France.,CNRS, UMR8104, Paris, France.,Paris Descartes University, Sorbonne Paris Cité, Paris, France
| | - Yonatan Ganor
- Laboratory of Mucosal Entry of HIV-1 and Mucosal Immunity, Department of Infection, Immunity and Inflammation, Cochin Institute, INSERM, Paris, France.,CNRS, UMR8104, Paris, France.,Paris Descartes University, Sorbonne Paris Cité, Paris, France
| | - Sonia Henry
- Laboratory of Mucosal Entry of HIV-1 and Mucosal Immunity, Department of Infection, Immunity and Inflammation, Cochin Institute, INSERM, Paris, France.,CNRS, UMR8104, Paris, France.,Paris Descartes University, Sorbonne Paris Cité, Paris, France
| | - Diane Damotte
- Anatomy and Pathological Cytology Service, GH Cochin-Saint Vincent de Paul, Paris, France
| | - Marc Revol
- Plastic Surgery Service, Saint Louis Hospital, Paris, France
| | | | - Morgane Bomsel
- Laboratory of Mucosal Entry of HIV-1 and Mucosal Immunity, Department of Infection, Immunity and Inflammation, Cochin Institute, INSERM, Paris, France.,CNRS, UMR8104, Paris, France.,Paris Descartes University, Sorbonne Paris Cité, Paris, France
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18
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Saborido R, Martinón N, Regueiro A, Crujeiras V, Eiras P, Leis R. Intraepithelial lymphocyte immunophenotype: a useful tool in the diagnosis of celiac disease. J Physiol Biochem 2017; 74:153-158. [PMID: 28815514 DOI: 10.1007/s13105-017-0586-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 07/24/2017] [Indexed: 12/20/2022]
Abstract
According to new ESPGHAN guidelines, gluten challenge is considered necessary when there is doubt about the initial diagnosis of celiac disease (CD). The main aim of this study was to quantify intraepithelial lymphocyte (IEL) immunophenotype on celiac patients on gluten-containing diet (GCD) compared to those on gluten-free diet (GFD). Another aim was to evaluate the clinical utility of IELs in the CD diagnosis, especially in selected patients on GFD where diagnostic uncertainty remains. IEL immunophenotype (TCRγδ and NK-like IELs) were studied by flow cytometry in 111 children with CD (81 children with CD on GCD and 30 celiac patients on GFD) and a control group (10 children). Duration of GFD was 5.4 ± 1.6 years. TCRγδ IELs in celiac patients receiving a GCD or GFD were significantly higher (p < 0.001) than in the control group. NK-like IELs in patients receiving a GCD or GFD were significantly lower than in the control group (p < 0.001). We observed a permanent decrease of NK-like IELs and an increment of TCRγδ IELs after following an adequate establishment and compliance of a long-term GFD in celiac patients. Recognition of IELs changes in the intestinal mucosa on celiac patients after long-term establishment of a GFD could constitute a useful tool for CD diagnosis in various situations: in which there is doubt about the initial diagnosis and repeat biopsy is necessary (avoiding the need of gluten challenges), and in those patients with symptoms/signs suggestive of CD who maintain a low gluten diet.
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Affiliation(s)
- Rebeca Saborido
- Paediatric Gastroenterology, Hepatology and Nutrition Unit, Department of Paediatrics, University Clinical Hospital of Santiago de Compostela, Travesa da Choupana, s/n CP 15706, Santiago de Compostela, A Coruña, Spain.
| | - Nazareth Martinón
- Paediatric Gastroenterology, Hepatology and Nutrition Unit, Department of Paediatrics, University Clinical Hospital of Santiago de Compostela, Travesa da Choupana, s/n CP 15706, Santiago de Compostela, A Coruña, Spain
| | - Alexandra Regueiro
- Paediatric Gastroenterology, Hepatology and Nutrition Unit, Department of Paediatrics, University Clinical Hospital of Santiago de Compostela, Travesa da Choupana, s/n CP 15706, Santiago de Compostela, A Coruña, Spain
| | - Vanesa Crujeiras
- Paediatric Gastroenterology, Hepatology and Nutrition Unit, Department of Paediatrics, University Clinical Hospital of Santiago de Compostela, Travesa da Choupana, s/n CP 15706, Santiago de Compostela, A Coruña, Spain
| | - Pablo Eiras
- Immunological Laboratory, University Clinical Hospital of Santiago de Compostela, Santiago de Compostela, Spain
| | - Rosaura Leis
- Paediatric Gastroenterology, Hepatology and Nutrition Unit, Department of Paediatrics, University Clinical Hospital of Santiago de Compostela, Travesa da Choupana, s/n CP 15706, Santiago de Compostela, A Coruña, Spain
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19
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Hosomi S, Grootjans J, Tschurtschenthaler M, Krupka N, Matute JD, Flak MB, Martinez-Naves E, Gomez Del Moral M, Glickman JN, Ohira M, Lanier LL, Kaser A, Blumberg R. Intestinal epithelial cell endoplasmic reticulum stress promotes MULT1 up-regulation and NKG2D-mediated inflammation. J Exp Med 2017; 214:2985-2997. [PMID: 28747426 PMCID: PMC5626394 DOI: 10.1084/jem.20162041] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Revised: 05/25/2017] [Accepted: 07/10/2017] [Indexed: 12/25/2022] Open
Abstract
Hosomi et al. show that intestinal epithelial cell–specific deletion of X-box–binding protein 1, an unfolded protein response–related transcription factor, results in CHOP-dependent increased expression of specific natural killer group 2 member D (NKG2D) ligands. This activates NKG2D-expressing intraepithelial group 1 ILCs and promotes small intestinal inflammation. Endoplasmic reticulum (ER) stress is commonly observed in intestinal epithelial cells (IECs) and can, if excessive, cause spontaneous intestinal inflammation as shown by mice with IEC-specific deletion of X-box–binding protein 1 (Xbp1), an unfolded protein response–related transcription factor. In this study, Xbp1 deletion in the epithelium (Xbp1ΔIEC) is shown to cause increased expression of natural killer group 2 member D (NKG2D) ligand (NKG2DL) mouse UL16-binding protein (ULBP)–like transcript 1 and its human orthologue cytomegalovirus ULBP via ER stress–related transcription factor C/EBP homology protein. Increased NKG2DL expression on mouse IECs is associated with increased numbers of intraepithelial NKG2D-expressing group 1 innate lymphoid cells (ILCs; NK cells or ILC1). Blockade of NKG2D suppresses cytolysis against ER-stressed epithelial cells in vitro and spontaneous enteritis in vivo. Pharmacological depletion of NK1.1+ cells also significantly improved enteritis, whereas enteritis was not ameliorated in Recombinase activating gene 1−/−;Xbp1ΔIEC mice. These experiments reveal innate immune sensing of ER stress in IECs as an important mechanism of intestinal inflammation.
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Affiliation(s)
- Shuhei Hosomi
- Department of Medicine, Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA.,Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Joep Grootjans
- Department of Medicine, Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA.,Department of Gastroenterology and Hepatology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Markus Tschurtschenthaler
- Department of Medicine, Division of Gastroenterology, University of Cambridge, Cambridge, England, UK
| | - Niklas Krupka
- Department of Medicine, Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Juan D Matute
- Department of Medicine, Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA.,Division of Newborn Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA
| | - Magdalena B Flak
- Department of Medicine, Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Eduardo Martinez-Naves
- Department of Microbiology and Immunology, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
| | - Manuel Gomez Del Moral
- Department of Cell Biology, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
| | | | - Mizuki Ohira
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Lewis L Lanier
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA.,Parker Institute for Cancer Immunotherapy, University of California, San Francisco, San Francisco, CA
| | - Arthur Kaser
- Department of Gastroenterology and Hepatology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Richard Blumberg
- Department of Medicine, Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
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20
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NK cells are biologic and biochemical targets of 6-mercaptopurine in Crohn's disease patients. Clin Immunol 2016; 175:82-90. [PMID: 28011186 DOI: 10.1016/j.clim.2016.12.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 12/11/2016] [Accepted: 12/16/2016] [Indexed: 01/18/2023]
Abstract
NK cells, which contribute to immune defense against certain viral infections and neoplasia, are emerging as modifiers of chronic immunologic diseases including transplant rejection and autoimmune diseases. Immunobiology and genetic studies have implicated NK cells as a modifier of Crohn's disease, a condition often treated with thiopurine agents such as 6-mercaptopurine (6-MP). Here, we demonstrate that thiopurines mediate NK cell apoptosis via a caspase 3 and 9 inclusive pathway, and that this process is triggered by thiopurine-mediated inhibition of Rac1. We also show that CD patients in clinical remission maintained on 6-MP have decreased NK cell Rac1 activity, and decreased NK cell numbers in their intestinal biopsies. These observations suggest that thiopurine targeting of NK cells may be a previously unappreciated therapeutic action of these agents in IBD.
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21
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Valle J, Morgado JMT, Ruiz-Martín J, Guardiola A, Lopes-Nogueras M, García-Vela A, Martín-Sacristán B, Sánchez-Muñoz L. Flow cytometry of duodenal intraepithelial lymphocytes improves diagnosis of celiac disease in difficult cases. United European Gastroenterol J 2016; 5:819-826. [PMID: 29026596 DOI: 10.1177/2050640616682181] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 10/25/2016] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Diagnosis of celiac disease is difficult when the combined results of serology and histology are inconclusive. Studies using flow cytometry of intraepithelial lymphocytes (IELs) have found that celiac patients have increased numbers of γδ IELs, along with a decrease in CD3-CD103 + IELs. OBJECTIVE The objective of this article is to assess the role of flow cytometric analysis of IELs in the diagnosis of celiac disease in difficult cases. METHODS A total of 312 patients with suspicion of celiac disease were included in the study. Duodenal biopsy samples were used for histological assessment and for flow cytometric analysis of IELs. RESULTS In 46 out of 312 cases (14.7%) the combination of serology and histology did not allow the confirmation or exclusion of celiac disease. HLA typing had been performed in 42 of these difficult cases. Taking into account HLA typing and the response to a gluten-free diet, celiac disease was excluded in 30 of these cases and confirmed in the remaining 12. Flow cytometric analysis of IELs allowed a correct diagnosis in 39 out of 42 difficult cases (92.8%) and had a sensitivity of 91.7% (95% CI: 61.5% to 99.8%) and a specificity of 93.3% (95% CI: 77.9% to 99.2%) for the diagnosis of celiac disease in this setting. CONCLUSION Flow cytometric analysis of IELs is useful for the diagnosis of celiac disease in difficult cases.
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Affiliation(s)
- Julio Valle
- Department of Gastroenterology, Complejo Hospitalario de Toledo, Spain
| | - José Mario T Morgado
- Instituto de Estudios de Mastocitosis de Castilla La Mancha, Complejo Hospitalario de Toledo, Spain
| | | | - Antonio Guardiola
- Department of Gastroenterology, Complejo Hospitalario de Toledo, Spain
| | | | | | | | - Laura Sánchez-Muñoz
- Instituto de Estudios de Mastocitosis de Castilla La Mancha, Complejo Hospitalario de Toledo, Spain
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22
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Zuber J, Shonts B, Lau SP, Obradovic A, Fu J, Yang S, Lambert M, Coley S, Weiner J, Thome J, DeWolf S, Farber DL, Shen Y, Caillat-Zucman S, Bhagat G, Griesemer A, Martinez M, Kato T, Sykes M. Bidirectional intragraft alloreactivity drives the repopulation of human intestinal allografts and correlates with clinical outcome. Sci Immunol 2016; 1. [PMID: 28239678 DOI: 10.1126/sciimmunol.aah3732] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A paradigm in transplantation states that graft-infiltrating T cells are largely non-alloreactive "bystander" cells. However, the origin and specificity of allograft T cells over time has not been investigated in detail in animals or humans. Here, we use polychromatic flow cytometry and high throughput TCR sequencing of serial biopsies to show that gut-resident T cell turnover kinetics in human intestinal allografts are correlated with the balance between intra-graft host-vs-graft (HvG) and graft-vs-host (GvH) reactivities and with clinical outcomes. In the absence of rejection, donor T cells were enriched for GvH-reactive clones that persisted long-term in the graft. Early expansion of GvH clones in the graft correlated with rapid replacement of donor APCs by the recipient. Rejection was associated with transient infiltration by blood-like recipient CD28+ NKG2DHi CD8+ alpha beta T cells, marked predominance of HvG clones, and accelerated T cell turnover in the graft. Ultimately, these recipient T cells acquired a steady state tissue-resident phenotype, but regained CD28 expression during rejections. Increased ratios of GvH to HvG clones were seen in non-rejectors, potentially mitigating the constant threat of rejection posed by HvG clones persisting within the tissue-resident graft T cell population.
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Affiliation(s)
- Julien Zuber
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, USA.,Department of Medicine, Columbia University, New York, USA
| | - Brittany Shonts
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, USA
| | - Sai-Ping Lau
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, USA
| | - Aleksandar Obradovic
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, USA
| | - Jianing Fu
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, USA.,Department of Medicine, Columbia University, New York, USA
| | - Suxiao Yang
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, USA.,Department of Medicine, Columbia University, New York, USA
| | | | - Shana Coley
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, USA.,Department of Pathology and Cell Biology, Columbia University, New York, USA
| | - Joshua Weiner
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, USA.,Department of Surgery, Columbia University, New York, USA
| | - Joseph Thome
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, USA.,Department of Microbiology & Immunology, Columbia University, New York, USA
| | - Susan DeWolf
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, USA.,Department of Medicine, Columbia University, New York, USA
| | - Donna L Farber
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, USA.,Department of Surgery, Columbia University, New York, USA.,Department of Microbiology & Immunology, Columbia University, New York, USA
| | - Yufeng Shen
- Center for Computational Biology and Bioinformatics, Columbia University Medical Center, New York, USA
| | | | - Govind Bhagat
- Department of Pathology and Cell Biology, Columbia University, New York, USA
| | - Adam Griesemer
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, USA.,Department of Surgery, Columbia University, New York, USA
| | | | - Tomoaki Kato
- Department of Surgery, Columbia University, New York, USA
| | - Megan Sykes
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, USA.,Department of Surgery, Columbia University, New York, USA.,Department of Microbiology & Immunology, Columbia University, New York, USA.,Department of Medicine, Columbia University, New York, USA
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23
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Ettersperger J, Montcuquet N, Malamut G, Guegan N, Lopez-Lastra S, Gayraud S, Reimann C, Vidal E, Cagnard N, Villarese P, Andre-Schmutz I, Gomes Domingues R, Godinho-Silva C, Veiga-Fernandes H, Lhermitte L, Asnafi V, Macintyre E, Cellier C, Beldjord K, Di Santo JP, Cerf-Bensussan N, Meresse B. Interleukin-15-Dependent T-Cell-like Innate Intraepithelial Lymphocytes Develop in the Intestine and Transform into Lymphomas in Celiac Disease. Immunity 2016; 45:610-625. [PMID: 27612641 DOI: 10.1016/j.immuni.2016.07.018] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 05/12/2016] [Accepted: 06/02/2016] [Indexed: 01/19/2023]
Abstract
The nature of gut intraepithelial lymphocytes (IELs) lacking antigen receptors remains controversial. Herein we showed that, in humans and in mice, innate intestinal IELs expressing intracellular CD3 (iCD3(+)) differentiate along an Id2 transcription factor (TF)-independent pathway in response to TF NOTCH1, interleukin-15 (IL-15), and Granzyme B signals. In NOTCH1-activated human hematopoietic precursors, IL-15 induced Granzyme B, which cleaved NOTCH1 into a peptide lacking transcriptional activity. As a result, NOTCH1 target genes indispensable for T cell differentiation were silenced and precursors were reprogrammed into innate cells with T cell marks including intracellular CD3 and T cell rearrangements. In the intraepithelial lymphoma complicating celiac disease, iCD3(+) innate IELs acquired gain-of-function mutations in Janus kinase 1 or Signal transducer and activator of transcription 3, which enhanced their response to IL-15. Overall we characterized gut T cell-like innate IELs, deciphered their pathway of differentiation and showed their malignant transformation in celiac disease.
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Affiliation(s)
- Julien Ettersperger
- INSERM UMR1163, Laboratory of Intestinal Immunity, Institut Imagine, 75015 Paris, France; Université Paris Descartes-Sorbonne Paris Cité and Institut Imagine, 75015 Paris, France
| | - Nicolas Montcuquet
- INSERM UMR1163, Laboratory of Intestinal Immunity, Institut Imagine, 75015 Paris, France; Université Paris Descartes-Sorbonne Paris Cité and Institut Imagine, 75015 Paris, France
| | - Georgia Malamut
- INSERM UMR1163, Laboratory of Intestinal Immunity, Institut Imagine, 75015 Paris, France; Université Paris Descartes-Sorbonne Paris Cité and Institut Imagine, 75015 Paris, France; AP-HP, Department of Gastroenterology, Hôpital Européen Georges Pompidou, 75015 Paris, France
| | - Nicolas Guegan
- INSERM UMR1163, Laboratory of Intestinal Immunity, Institut Imagine, 75015 Paris, France; Université Paris Descartes-Sorbonne Paris Cité and Institut Imagine, 75015 Paris, France
| | - Silvia Lopez-Lastra
- Innate Immunity Unit, Institut Pasteur, 75015 Paris, France; INSERM U 668, 75015 Paris, France
| | - Ségolène Gayraud
- INSERM UMR1163, Laboratory of Intestinal Immunity, Institut Imagine, 75015 Paris, France; Université Paris Descartes-Sorbonne Paris Cité and Institut Imagine, 75015 Paris, France
| | - Christian Reimann
- Université Paris Descartes-Sorbonne Paris Cité and Institut Imagine, 75015 Paris, France; INSERM UMR1163, Laboratory of Human Lymphohematopoiesis, 75015 Paris, France
| | - Elodie Vidal
- Université Paris Descartes-Sorbonne Paris Cité, Institut Necker-Enfants-Malades, INSERM UMR1151 and, Biological Hematology, AP-HP Necker-Enfants-Malades, 75015 Paris, France
| | | | - Patrick Villarese
- Université Paris Descartes-Sorbonne Paris Cité, Institut Necker-Enfants-Malades, INSERM UMR1151 and, Biological Hematology, AP-HP Necker-Enfants-Malades, 75015 Paris, France
| | - Isabelle Andre-Schmutz
- Université Paris Descartes-Sorbonne Paris Cité and Institut Imagine, 75015 Paris, France; INSERM UMR1163, Laboratory of Human Lymphohematopoiesis, 75015 Paris, France
| | - Rita Gomes Domingues
- Instituto de Medicina Molecular, Faculdade de Medicina de Lisboa, 1649-028 Lisboa, Portugal
| | - Cristina Godinho-Silva
- Instituto de Medicina Molecular, Faculdade de Medicina de Lisboa, 1649-028 Lisboa, Portugal
| | | | - Ludovic Lhermitte
- Université Paris Descartes-Sorbonne Paris Cité, Institut Necker-Enfants-Malades, INSERM UMR1151 and, Biological Hematology, AP-HP Necker-Enfants-Malades, 75015 Paris, France
| | - Vahid Asnafi
- Université Paris Descartes-Sorbonne Paris Cité, Institut Necker-Enfants-Malades, INSERM UMR1151 and, Biological Hematology, AP-HP Necker-Enfants-Malades, 75015 Paris, France
| | - Elizabeth Macintyre
- Université Paris Descartes-Sorbonne Paris Cité, Institut Necker-Enfants-Malades, INSERM UMR1151 and, Biological Hematology, AP-HP Necker-Enfants-Malades, 75015 Paris, France
| | - Christophe Cellier
- INSERM UMR1163, Laboratory of Intestinal Immunity, Institut Imagine, 75015 Paris, France; Université Paris Descartes-Sorbonne Paris Cité and Institut Imagine, 75015 Paris, France; AP-HP, Department of Gastroenterology, Hôpital Européen Georges Pompidou, 75015 Paris, France
| | - Kheira Beldjord
- Université Paris Descartes-Sorbonne Paris Cité, Institut Necker-Enfants-Malades, INSERM UMR1151 and, Biological Hematology, AP-HP Necker-Enfants-Malades, 75015 Paris, France; Institut Universitaire d'Hématologie, Hôpital Saint-Louis, 75010 Paris, France
| | - James P Di Santo
- Innate Immunity Unit, Institut Pasteur, 75015 Paris, France; INSERM U 668, 75015 Paris, France
| | - Nadine Cerf-Bensussan
- INSERM UMR1163, Laboratory of Intestinal Immunity, Institut Imagine, 75015 Paris, France; Université Paris Descartes-Sorbonne Paris Cité and Institut Imagine, 75015 Paris, France.
| | - Bertrand Meresse
- INSERM UMR1163, Laboratory of Intestinal Immunity, Institut Imagine, 75015 Paris, France; Université Paris Descartes-Sorbonne Paris Cité and Institut Imagine, 75015 Paris, France.
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24
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Schmitz F, Kooy-Winkelaar Y, Wiekmeijer AS, Brugman MH, Mearin ML, Mulder C, Chuva de Sousa Lopes S, Mummery CL, Staal FJ, van Bergen J, Koning F. The composition and differentiation potential of the duodenal intraepithelial innate lymphocyte compartment is altered in coeliac disease. Gut 2016; 65:1269-78. [PMID: 25966995 DOI: 10.1136/gutjnl-2014-308153] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 04/02/2015] [Indexed: 01/01/2023]
Abstract
OBJECTIVE Coeliac disease (CD), a gluten-induced enteropathy, alters the composition and function of duodenal intraepithelial T cells. The intestine also harbours four types of CD3-negative intraepithelial lymphocytes (IELs) with largely unknown function: CD56(-)CD127(-), CD56(-)CD127(+), CD56(+)CD127(-) and CD56(+)CD127(+). Here we aimed to gain insight into the potential function of these innate IELs in health and disease. DESIGN We determined the phenotypes, relative abundance and differentiation potential of these innate IEL subsets in duodenal biopsies from controls and patients with CD or patients with refractory CD type II (RCDII). RESULTS Hierarchical clustering analysis of the expression of 15 natural killer and T cell surface markers showed that innate IELs differed markedly from innate peripheral blood lymphocytes and divided innate IEL subsets into two main branches: a CD127(-) branch expressing high levels of interleukin (IL) 2/15Rβ but no IL-21R, and a CD127(+) branch with the opposite phenotype. While CD was characterised by the contraction of all four innate IEL subsets, a selective expansion of CD56(-)CD127(-) and CD56(-)CD127(+) innate IEL was detected in RCDII. In vitro, in the presence of IL-15, CD56(-)CD127(-) IEL from controls and patients with CD, but not from patients with RCDII, differentiated into functional natural killer and T cells, the latter largely dependent on notch-signalling. Furthermore, compared with non-coeliac controls, CD56(-)CD127(-) IEL from patients with CD expressed more intracellular CD3ε and CD3γ and gave more pronounced T cell differentiation. CONCLUSIONS Thus, we demonstrate previously unappreciated diversity and plasticity of the innate IEL compartment and its loss of differentiation potential in patients with RCDII.
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Affiliation(s)
- Frederike Schmitz
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands
| | - Yvonne Kooy-Winkelaar
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands
| | - Anna-Sophia Wiekmeijer
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands
| | | | - M Luisa Mearin
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands Department of Pediatrics, Leiden University Medical Center, Leiden, The Netherlands
| | - Chris Mulder
- Department of Gastroenterology, Free University Medical Center, Amsterdam, The Netherlands
| | | | - Christine L Mummery
- Department of Anatomy and Embryology, Leiden University Medical Center, Leiden, The Netherlands
| | - Frank Jt Staal
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands
| | - Jeroen van Bergen
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands
| | - Frits Koning
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands
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25
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Abstract
During the last decade, probiotics have been established to be important mediators of host immunity. Their effects on both innate and adaptive immunity have been documented in the literature. Although several reports have correlated different strains of bacteria as probiotics, their effects on immunity vary. Clearly, there is a complex interplay between various constituents of probiotics and the immune response in humans. The role of probiotics on natural killer (NK) cells in the gut has been the subject of a few reports. In this review, we summarize the reported findings on the role of probiotics in the activation of gut-associated NK cells and the response of NK cells to stimuli elicited by probiotics and their microenvironment. The effects of probiotics on the activation of NK cells and their secretion of immune factors (e.g., interferon-γ, tumor necrosis factor-α, interleukin-2, etc.) are discussed in regard to their clinical significance in various diseases. Current investigations are being pursued, in particular, on the role of probiotics-activated NK cells in promoting the adaptive immune response against pathogens.
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Affiliation(s)
- Nabil Aziz
- Department of Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine, Jonsson Comprehensive Cancer Center, University of California, Los Angeles, CA 90095
| | - Benjamin Bonavida
- Department of Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine, Jonsson Comprehensive Cancer Center, University of California, Los Angeles, CA 90095
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26
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Talayero P, Mancebo E, Calvo-Pulido J, Rodríguez-Muñoz S, Bernardo I, Laguna-Goya R, Cano-Romero FL, García-Sesma A, Loinaz C, Jiménez C, Justo I, Paz-Artal E. Innate Lymphoid Cells Groups 1 and 3 in the Epithelial Compartment of Functional Human Intestinal Allografts. Am J Transplant 2016; 16:72-82. [PMID: 26317573 DOI: 10.1111/ajt.13435] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 05/27/2015] [Accepted: 06/21/2015] [Indexed: 01/25/2023]
Abstract
We examined intraepithelial lymphocytes (IELs) in 213 ileal biopsies from 16 bowel grafts and compared them with 32 biopsies from native intestines. During the first year posttransplantation, grafts exhibited low levels of IELs (percentage of CD103(+) cells) principally due to reduced CD3(+) CD8(+) cells, while CD103(+) CD3(-) cell numbers became significantly higher. Changes in IEL subsets did not correlate with histology results, isolated intestine, or multivisceral transplants, but CD3(-) IELs were significantly higher in patients receiving corticosteroids. Compared with controls, more CD3(-) IELs of the grafts expressed CD56, NKp44, interleukin (IL)-23 receptor, retinoid-related orphan receptor gamma t (RORγt), and CCR6. No difference was observed in granzyme B, and CD3(-) CD127(+) cells were more abundant in native intestines. Ex vivo, and after in vitro activation, CD3(-) IELs in grafts produced significantly more interferon (IFN)-γ and IL-22, and a double IFNγ(+) IL-22(+) population was observed. Epithelial cell-depleted grafts IELs were cytotoxic, whereas this was not observed in controls. In conclusion, different from native intestines, a CD3(-) IEL subset predominates in grafts, showing features of natural killer cells and intraepithelial ILC1 (CD56(+) , NKp44(+) , CCR6(+) , CD127(-) , cytotoxicity, and IFNγ secretion), ILC3 (CD56(+) , NKp44(+) , IL-23R(+) , CCR6(+) , RORγt(+) , and IL-22 secretion), and intermediate ILC1-ILC3 phenotypes (IFNγ(+) IL-22(+) ). Viability of intestinal grafts may depend on the balance among proinflammatory and homeostatic roles of ILC subsets.
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Affiliation(s)
- P Talayero
- Department of Immunology, University Hospital 12 de Octubre, Madrid, Spain.,I+12 Research Institute, University Hospital 12 de Octubre, Madrid, Spain
| | - E Mancebo
- Department of Immunology, University Hospital 12 de Octubre, Madrid, Spain.,I+12 Research Institute, University Hospital 12 de Octubre, Madrid, Spain
| | - J Calvo-Pulido
- Department of General and Digestive Surgery and Abdominal Organ Transplantation, University Hospital 12 de Octubre, Madrid, Spain
| | - S Rodríguez-Muñoz
- Department of Gastroenterology, University Hospital 12 de Octubre, Madrid, Spain
| | - I Bernardo
- Department of Immunology, University Hospital 12 de Octubre, Madrid, Spain
| | - R Laguna-Goya
- Department of Immunology, University Hospital 12 de Octubre, Madrid, Spain.,I+12 Research Institute, University Hospital 12 de Octubre, Madrid, Spain
| | - F L Cano-Romero
- I+12 Research Institute, University Hospital 12 de Octubre, Madrid, Spain
| | - A García-Sesma
- Department of General and Digestive Surgery and Abdominal Organ Transplantation, University Hospital 12 de Octubre, Madrid, Spain
| | - C Loinaz
- Department of General and Digestive Surgery and Abdominal Organ Transplantation, University Hospital 12 de Octubre, Madrid, Spain
| | - C Jiménez
- I+12 Research Institute, University Hospital 12 de Octubre, Madrid, Spain.,Department of General and Digestive Surgery and Abdominal Organ Transplantation, University Hospital 12 de Octubre, Madrid, Spain.,School of Medicine, Complutense University, Madrid, Spain
| | - I Justo
- Department of General and Digestive Surgery and Abdominal Organ Transplantation, University Hospital 12 de Octubre, Madrid, Spain
| | - E Paz-Artal
- Department of Immunology, University Hospital 12 de Octubre, Madrid, Spain.,I+12 Research Institute, University Hospital 12 de Octubre, Madrid, Spain.,School of Medicine, Complutense University, Madrid, Spain.,Section of Immunology, San Pablo CEU University, Madrid, Spain
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27
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Effector Cells of the Mucosal Immune System. Mucosal Immunol 2015. [DOI: 10.1016/b978-0-12-415847-4.00039-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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28
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Sharma R, Das A. Organ-specific phenotypic and functional features of NK cells in humans. Immunol Res 2014; 58:125-31. [PMID: 24366663 DOI: 10.1007/s12026-013-8477-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Natural killer (NK) cells kill virus-infected and tumor target cells without prior sensitization. Each NK cell expresses a multitude of activating and inhibitory receptors, and the interplay of signals determines the outcome of NK cell activity. NK cell-mediated cytolysis of target cell involves polarized degranulation at effector-target interface. Peripheral blood NK cell constitutes about 10% of lymphocytes, and approximately 90% of peripheral blood NK cells are CD56(dim)CD16(+); however, there is a distinct subset of NK cells, CD56(bright)CD16(-), expressed by certain lymphoid organs which are able to produce large amounts of cytokines including interferon-γ, tumor necrosis factor, and granulocyte-macrophage colony-stimulating factor, but the cytotoxicity is attained only on their prolonged activation. In this review, we discuss the accumulated data on distinct phenotypes of NK cells in human uterus, liver, intestine, skin, and lung and also attempt to correlate their phenotype with corresponding activity and functions, with significant stress on the role of NK cells in pathology in the specific organs. Our detailed understanding of altered NK cell activity in different organs and their inherent cytotoxic activity against tumor target cells will help us design better immunotherapeutic strategies in NK cell-mediated cancer therapies.
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Affiliation(s)
- Richa Sharma
- Department of Biotechnology, Delhi Technological University, Bawana Road, New Delhi, 110042, Delhi, India
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29
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NK cells in mucosal defense against infection. BIOMED RESEARCH INTERNATIONAL 2014; 2014:413982. [PMID: 25197644 PMCID: PMC4150440 DOI: 10.1155/2014/413982] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Accepted: 07/31/2014] [Indexed: 01/06/2023]
Abstract
Conventional natural killer cells (NK cells) provide continual surveillance for cancer and rapid responses to infection. They develop in the bone marrow, emerge as either NK precursor cells, immature, or mature cells, and disperse throughout the body. In the periphery NK cells provide critical defense against pathogens and cancer and are noted to develop features of adaptive immune responses. In the tightly regulated and dynamic mucosal tissues, they set up residency via unknown mechanisms and from sources that are yet to be defined. Once resident, they appear to have the ability to functionally mature dependent on the mucosal tissue microenvironment. Mucosal NK cells play a pivotal role in early protection through their cytolytic function and IFNγ production against bacteria, fungi, viruses, and parasitic infections. This review presents what is known about NK cell development and phenotypes of mucosal tissue resident conventional NK cells. The question of how they come to reside in their tissues and published data on their function against pathogens during mucosal infection are discussed. Dissecting major questions highlighted in this review will be important to the further understanding of NK cell homing and functional diversity and improve rational design of NK cell based therapies against mucosal infection.
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30
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Lin L, Ma C, Wei B, Aziz N, Rajalingam R, Yusung S, Erlich HA, Trachtenberg EA, Targan SR, McGovern DPB, Heath JR, Braun J. Human NK cells licensed by killer Ig receptor genes have an altered cytokine program that modifies CD4+ T cell function. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2014; 193:940-9. [PMID: 24935928 PMCID: PMC4096688 DOI: 10.4049/jimmunol.1400093] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
NK cells are innate immune cells known for their cytolytic activities toward tumors and infections. They are capable of expressing diverse killer Ig-like receptors (KIRs), and KIRs are implicated in susceptibility to Crohn's disease (CD), a chronic intestinal inflammatory disease. However, the cellular mechanism of this genetic contribution is unknown. In this study, we show that the "licensing" of NK cells, determined by the presence of KIR2DL3 and homozygous HLA-C1 in host genome, results in their cytokine reprogramming, which permits them to promote CD4(+) T cell activation and Th17 differentiation ex vivo. Microfluidic analysis of thousands of NK single cells and bulk secretions established that licensed NK cells are more polarized to proinflammatory cytokine production than unlicensed NK cells, including production of IFN-γ, TNF-α, CCL-5, and MIP-1β. Cytokines produced by licensed NK augmented CD4(+) T cell proliferation and IL-17A/IL-22 production. Ab blocking indicated a primary role for IFN-γ, TNF-α, and IL-6 in the augmented T cell-proliferative response. In conclusion, NK licensing mediated by KIR2DL2/3 and HLA-C1 elicits a novel NK cytokine program that activates and induces proinflammatory CD4(+) T cells, thereby providing a potential biologic mechanism for KIR-associated susceptibility to CD and other chronic inflammatory diseases.
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Affiliation(s)
- Lin Lin
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095; Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095
| | - Chao Ma
- Division of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125
| | - Bo Wei
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095
| | - Najib Aziz
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095
| | - Raja Rajalingam
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095
| | - Susy Yusung
- Mattel Children's Hospital, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095
| | - Henry A Erlich
- Children's Hospital Oakland Research Institute, Oakland, CA 94609
| | | | - Stephan R Targan
- Translational Genomics Group, F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Los Angeles, CA 90048
| | - Dermot P B McGovern
- Translational Genomics Group, F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Los Angeles, CA 90048; Medical Genetics Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048
| | - James R Heath
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095; NanoSystems Biology Cancer Center, California Institute of Technology, Pasadena, CA 91125; and Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125
| | - Jonathan Braun
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095; Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095;
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31
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Fernández-Bañares F, Carrasco A, García-Puig R, Rosinach M, González C, Alsina M, Loras C, Salas A, Viver JM, Esteve M. Intestinal intraepithelial lymphocyte cytometric pattern is more accurate than subepithelial deposits of anti-tissue transglutaminase IgA for the diagnosis of celiac disease in lymphocytic enteritis. PLoS One 2014; 9:e101249. [PMID: 25010214 PMCID: PMC4091865 DOI: 10.1371/journal.pone.0101249] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 06/04/2014] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND & AIMS An increase in CD3+TCRγδ+ and a decrease in CD3- intraepithelial lymphocytes (IEL) is a characteristic flow cytometric pattern of celiac disease (CD) with atrophy. The aim was to evaluate the usefulness of both CD IEL cytometric pattern and anti-TG2 IgA subepithelial deposit analysis (CD IF pattern) for diagnosing lymphocytic enteritis due to CD. METHODS Two-hundred and five patients (144 females) who underwent duodenal biopsy for clinical suspicion of CD and positive celiac genetics were prospectively included. Fifty had villous atrophy, 70 lymphocytic enteritis, and 85 normal histology. Eight patients with non-celiac atrophy and 15 with lymphocytic enteritis secondary to Helicobacter pylori acted as control group. Duodenal biopsies were obtained to assess both CD IEL flow cytometric (complete or incomplete) and IF patterns. RESULTS Sensitivity of IF, and complete and incomplete cytometric patterns for CD diagnosis in patients with positive serology (Marsh 1+3) was 92%, 85 and 97% respectively, but only the complete cytometric pattern had 100% specificity. Twelve seropositive and 8 seronegative Marsh 1 patients had a CD diagnosis at inclusion or after gluten free-diet, respectively. CD cytometric pattern showed a better diagnostic performance than both IF pattern and serology for CD diagnosis in lymphocytic enteritis at baseline (95% vs 60% vs 60%, p = 0.039). CONCLUSIONS Analysis of the IEL flow cytometric pattern is a fast, accurate method for identifying CD in the initial diagnostic biopsy of patients presenting with lymphocytic enteritis, even in seronegative patients, and seems to be better than anti-TG2 intestinal deposits.
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Affiliation(s)
- Fernando Fernández-Bañares
- Department of Gastroenterology, Hospital Universitari Mutua Terrassa, University of Barcelona, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Terrassa (Barcelona), Spain
- * E-mail:
| | - Anna Carrasco
- Department of Gastroenterology, Hospital Universitari Mutua Terrassa, University of Barcelona, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Terrassa (Barcelona), Spain
| | - Roger García-Puig
- Department of Pediatrics, Hospital Universitari Mutua Terrassa, University of Barcelona, Terrassa (Barcelona), Spain
| | - Mercè Rosinach
- Department of Gastroenterology, Hospital Universitari Mutua Terrassa, University of Barcelona, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Terrassa (Barcelona), Spain
| | - Clarisa González
- Department of Pathology, Hospital Universitari Mutua Terrassa, University of Barcelona, CIBERehd, Terrassa (Barcelona), Spain
| | | | - Carme Loras
- Department of Gastroenterology, Hospital Universitari Mutua Terrassa, University of Barcelona, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Terrassa (Barcelona), Spain
| | - Antonio Salas
- Department of Pathology, Hospital Universitari Mutua Terrassa, University of Barcelona, CIBERehd, Terrassa (Barcelona), Spain
| | - Josep M. Viver
- Department of Gastroenterology, Hospital Universitari Mutua Terrassa, University of Barcelona, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Terrassa (Barcelona), Spain
| | - Maria Esteve
- Department of Gastroenterology, Hospital Universitari Mutua Terrassa, University of Barcelona, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Terrassa (Barcelona), Spain
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32
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Olsen L, Boysen P, Åkesson CP, Gunnes G, Connelley T, Storset AK, Espenes A. Characterization of NCR1+ cells residing in lymphoid tissues in the gut of lambs indicates that the majority are NK cells. Vet Res 2013; 44:109. [PMID: 24219350 PMCID: PMC4176090 DOI: 10.1186/1297-9716-44-109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Accepted: 10/10/2013] [Indexed: 12/20/2022] Open
Abstract
Natural killer (NK) cells are important for immune protection of the gut mucosa. Previous studies have shown that under pathologic conditions NK cells, T cells and dendritic cells are found co-localised in secondary lymphoid organs where their interaction coordinates immune responses. However, in the gut-associated lymphoid tissues (GALTs), there are few detailed reports on the distribution of NK cells. Sheep harbour several types of organised lymphoid tissues in the gut that have different functions. The ileal Peyer's patch (IPP) functions as a primary lymphoid tissue for B cell generation, while the jejunal Peyer's patches (JPPs) and colon patches (CPs) are considered secondary lymphoid tissues. In the present study, we analysed tissues from healthy lambs by flow cytometry and in situ multicolour immunofluorescence, using recently described NCR1 antibodies to identify ovine NK cells. Most NCR1+ cells isolated from all tissues were negative for the pan T cell marker CD3, and thus comply with the general definition of NK cells. The majority of NCR1+ cells in blood as well as secondary lymphoid organs expressed CD16, but in the GALT around half of the NCR1+ cells were negative for CD16. A semi-quantitative morphometric study on tissue sections was used to compare the density of NK cells in four compartments of the IPPs, JPP and CPs. NCR1+ cells were found in all gut segments. Statistical analysis revealed significant differences between compartments of the primary lymphoid organ IPP and the secondary lymphoid organs of the JPPs and CP. NK cells co-localised and made close contact with T cells, dendritic cells and other NK cells, but did not show signs of proliferation. We conclude that NK cells are present in all investigated segments of the sheep gut, but that presence of other innate lymphoid cells expressing NCR1 cannot be excluded.
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Affiliation(s)
- Line Olsen
- Department of Basic Sciences and Aquatic Medicine, Norwegian School of Veterinary Science, Oslo, Norway.
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Abstract
Certain subsets of the population are at a greater risk of acquiring foodborne infections and have a greater propensity to develop serious complications. Susceptibility to foodborne infection is dependent on numerous factors that largely relate to the status of an individual's defense systems in regard to both preventing and mitigating foodborne illness. Key examples include the increased susceptibility of pregnant women to listeriosis and increased severity of enteric bacterial infections in patients with AIDS. Clinicians must communicate with higher-risk patients about the risks of foodborne illness, and provide patients with information regarding safe food-handling practices.
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Kosaka A, Yan H, Ohashi S, Gotoh Y, Sato A, Tsutsui H, Kaisho T, Toda T, Tsuji NM. Lactococcus lactis subsp. cremoris FC triggers IFN-γ production from NK and T cells via IL-12 and IL-18. Int Immunopharmacol 2012; 14:729-33. [PMID: 23102661 DOI: 10.1016/j.intimp.2012.10.007] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Revised: 10/06/2012] [Accepted: 10/11/2012] [Indexed: 12/13/2022]
Abstract
Lactic acid bacteria (LAB) benefit health as probiotics in a strain-dependent way. In this study, we investigated the immunomodulatory effects of Lactococcus lactis subsp. cremoris FC (LcFC) on dendritic cells (DCs), natural killer (NK) cells and T cells. LcFC induced the production of cytokines such as IL-10, IL-12, IL-6 and TNF-α from murine bone marrow DCs (BMDCs) via MyD88-dependent pathway. In comparison with the type strain L. lactis subsp. cremoris ATCC 19257, LcFC induced particularly high production of IL-12 while induction of IL-6 was moderate. Consequently, LcFC triggered IFN-γ production in splenic NK, CD8(+), and CD4(+) cells. Most prominent effect of LcFC on IFN-γ production was observed in NK cells, followed by CD8(+) cells, which was completely inhibited by combination of neutralizing anti-IL-12 and anti-IL-18 mAbs. Moreover, oral administration of LcFC enhanced the production of IFN-γ and IL-10 from splenocytes of treated mice. These findings suggest that this LAB strain is an efficient activator of protective cellular immunity via stimulation of myeloid cells including DCs.
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Affiliation(s)
- Akemi Kosaka
- Biomedial Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8566, Japan
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Abstract
From the publication of the first AIDS issue onwards, major advances have been made in the field of innate immunity during HIV infection. Innate immunity can be defined as the first and unspecific lines of defense constitutively present and ready to be mobilized upon infection. Although a large body of literature adamantly highlights that innate immunity is a critical weapon of defense against HIV and its simian parents (simian immunodeficiency virus, SIV), innate immunity is still underexplored. Focusing on innate immunity may open new paths for the development of innovative therapeutics and vaccine strategies against HIV. Understanding innate immunity may shed light on the natural protection occurring in rare HIV-1-infected individuals who control their infection. This review focuses on innate mechanisms sensing HIV-1 entry and controlling HIV-1 infection, as well as promoting inflammation and shaping adaptive immunity.
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Abstract
The human gut mucosa is a major site of human immunodeficiency virus (HIV) infection and infection-associated pathogenesis. Increasing evidence shows that natural killer (NK) cells have an important role in control of HIV infection, but the mechanism(s) by which they mediate antiviral activity in the gut is unclear. Here, we show that two distinct subsets of NK cells exist in the gut, one localized to intraepithelial spaces (intraepithelial lymphocytes, IELs) and the other to the lamina propria (LP). The frequency of both subsets of NK cells was reduced in chronic infection, whereas IEL NK cells remained stable in spontaneous controllers with protective killer immunoglobulin-like receptor/human leukocyte antigen genotypes. Both IEL and LP NK cells were significantly expanded in immunological non-responsive patients, who incompletely recovered CD4+ T cells on highly active antiretroviral therapy (HAART). These data suggest that both IEL and LP NK cells may expand in the gut in an effort to compensate for compromised CD4+ T-cell recovery, but that only IEL NK cells may be involved in providing durable control of HIV in the gut.
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Fuchs A, Colonna M. Natural killer (NK) and NK-like cells at mucosal epithelia: Mediators of anti-microbial defense and maintenance of tissue integrity. Eur J Microbiol Immunol (Bp) 2011; 1:257-66. [PMID: 24516732 DOI: 10.1556/eujmi.1.2011.4.1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2011] [Accepted: 10/11/2011] [Indexed: 12/30/2022] Open
Abstract
Natural killer (NK) cells are innate lymphocytes that play important roles in the defense against microbial pathogens through secretion of IFN-γ and recognition and lysis of virally or bacterially infected host cells. A recently identified population of NK-like cells that shares characteristics of both NK cells and lymphoid tissue inducer (LTi) cells promotes innate immune responses in epithelial tissue through the secretion of IL-22. In contrast to classical NK cells, NK-like cells are localized preferentially at mucosal sites, such as the intestinal mucosa. In this review, we consider the function of NK and NK-like cells in anti-microbial defense as well as the maintenance of tissue integrity in the mucosal epithelium of the intestine, lung, and female reproductive tract. Current experimental evidence supports an important protective role for IL-22-producing NK-like cells during intestinal infections, whereas classical NK cells are crucial in the early defense against many pathogens in the respiratory tract. NK cells isolated from the pregnant uterus differ significantly in phenotype and function from those at other tissue locations. Uterine NK cells clearly contribute to the tissue remodeling that takes place during placentation, but their role in anti-microbial defense remains largely undefined.
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Affiliation(s)
- A Fuchs
- Department of Pathology and Immunology, Washington University School of Medicine St. Louis, Missouri 63110 USA
| | - M Colonna
- Department of Pathology and Immunology, Washington University School of Medicine St. Louis, Missouri 63110 USA
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Dynamics of non-conventional intraepithelial lymphocytes-NK, NKT, and γδ T-in celiac disease: relationship with age, diet, and histopathology. Dig Dis Sci 2011; 56:2042-9. [PMID: 21221796 DOI: 10.1007/s10620-010-1534-5] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2010] [Accepted: 12/10/2010] [Indexed: 01/12/2023]
Abstract
BACKGROUND Intraepithelial lymphocytes (IEL) are a heterogeneous population of lymphocytes raised in celiac disease (CD), whose role in CD pathogenesis remains to be defined. AIMS To investigate how the age of diagnosis, diet, and the severity of the histological lesions are related to the changes observed in unconventional IEL populations. METHODS Prospective analysis of 101 confirmed celiac patients from a single center, including 66 at diagnosis (45 children, 21 adults) and 112 non-celiac controls (12 children, 100 adults). IEL from duodenal biopsies were studied by six-color flow cytometry. The results were analyzed in relationship with age, diet (gluten intake), and histopathology (Marsh type). RESULTS In comparison with respective age controls, both children and adult patients showed duodenal intraepithelial lymphocytosis with significant differences in every single non-conventional IEL population: CD3+ TCR γδ, NK (CD3-, CD16+, CD56+), NKT (CD3+, CD161+, CD56+), and iNKT (CD3+ Vα24) (P < 0.001 for all). Gluten intake was not only directly associated with severe atrophy, but also with decreased percentages of NK (P = 0.02), NKT (P = 0.003), and iNKT (P = 0.03). Changes in iNKT and γδ IEL were more marked in celiac children compared with celiac adults (P = 0.02 and 0.01, respectively). In contrast, increased CD3+ TCR γδ were diet- and Marsh grade-independent. CONCLUSIONS The typical phenotypical profile of intraepithelial lymphocytosis in untreated pediatric and adult celiacs consists of increased CD3+ TCR γδ populations with decreased NK, NKT, and iNKT cells. NK, NKT, and iNKT IEL, but not γδ IEL, are dynamic populations associated with diet, age, and histopathology.
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Potential role of NK cells in the pathogenesis of inflammatory bowel disease. J Biomed Biotechnol 2011; 2011:348530. [PMID: 21687547 PMCID: PMC3114561 DOI: 10.1155/2011/348530] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2010] [Accepted: 04/11/2011] [Indexed: 12/15/2022] Open
Abstract
NK cells are a major component of the innate immune system and play an important role in the tissue inflammation associated with autoimmune diseases such as inflammatory bowel disease (IBD). NK cells are unique in bearing both stimulatory and inhibitory receptors specific for MHC class I molecules, and their function is regulated by a series of inhibiting or activating signals. The delicate balance between activation and inhibition that decides NK cell final action provides an opportunity for their possible modulatory effect on specific therapeutic settings. Intestinal NK cells are phenotypically distinct from their counterparts in the blood and resemble “helper” NK cells, which have potentially important functions both in promoting antipathogen responses and in the maintenance of intestinal epithelial homeostasis. NK cell activities have been found to be significantly below normal levels in both remissive and active stages of IBD patients. However, some proinflammatory cytokines (e.g., IL-15, IL-21, and IL-23) could potently induce NK cell activation to secret high levels of proinflammatory cytokines (e.g., IFN-γ and TNF) and promote the cytolytic activities against the target cells. This paper provides the characteristics of intestinal NK cells and their potential role in the pathogenesis of IBD.
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Role of natural killer and dendritic cell crosstalk in immunomodulation by commensal bacteria probiotics. J Biomed Biotechnol 2011; 2011:473097. [PMID: 21660136 PMCID: PMC3110311 DOI: 10.1155/2011/473097] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Accepted: 03/01/2011] [Indexed: 02/07/2023] Open
Abstract
A cooperative dialogue between natural killer (NK) cells and dendritic cells (DCs) has been elucidated in the last years. They help each other to acquire their complete functions, both in the periphery and in the secondary lymphoid organs. Thus, NK cells' activation by dendritic cells allows the killing of transformed or infected cells in the periphery but may also be important for the generation of adaptive immunity. Indeed, it has been shown that NK cells may play a key role in polarizing a Th1 response upon interaction with DCs exposed to microbial products. This regulatory role of DC/NK cross-talk is of particular importance at mucosal surfaces such as the intestine, where the immune system exists in intimate association with commensal bacteria such as lactic acid bacteria (LAB). We here review NK/DC interactions in the presence of gut-derived commensal bacteria and their role in bacterial strain-dependent immunomodulatory effects. We particularly aim to highlight the ability of distinct species of commensal bacterial probiotics to differently affect the outcome of DC/NK cross-talk and consequently to differently influence the polarization of the adaptive immune response.
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Steel AW, Mela CM, Lindsay JO, Gazzard BG, Goodier MR. Increased proportion of CD16(+) NK cells in the colonic lamina propria of inflammatory bowel disease patients, but not after azathioprine treatment. Aliment Pharmacol Ther 2011; 33:115-26. [PMID: 21083588 DOI: 10.1111/j.1365-2036.2010.04499.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Distinct functional subsets of natural killer cells potentially contribute to the pathology of inflammatory bowel disease (IBD). AIM To report the phenotypic and functional characteristics of natural killer cells in blood and lamina propria of IBD patients, and the effect of azathioprine. METHODS Natural killer cells from blood and lamina propria of healthy controls or patients with Crohn's disease, or ulcerative colitis were studied by flow cytometry. Activation, cytokine production, proliferation and apoptosis of natural killer cell subsets were studied in vitro. RESULTS CD16(+) natural killer cells are increased in frequency in the lamina propria comparing Crohn's disease or ulcerative colitis with healthy controls. Azathioprine therapy was associated with a reduction in total natural killer cells in blood and lamina propria, preferentially of the CD16(+) subset. Azathioprine therapy did not impair natural killer degranulation, but reduced natural and cytokine-activated cytotoxicity and interferon-gamma (IFN-γ) production. Culture of resting peripheral blood mononuclear cells with azathioprine resulted in loss of natural killer cells and inhibition of activation and IFN-γ production. Azathioprine preferentially inhibited proliferation of CD16(+) natural killer cells and induced apoptosis in resting but not in pre-activated natural killer cells. CONCLUSIONS Natural killer cells with cytolytic potential are enriched in the colonic lamina propria of individuals with IBD. Azathioprine is associated with a reduction in these cells and a normalization of natural killer cell populations.
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Affiliation(s)
- A W Steel
- Department of Gastroenterology, Chelsea and Westminster Hospital, London, UK
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Leon F. Flow cytometry of intestinal intraepithelial lymphocytes in celiac disease. J Immunol Methods 2010; 363:177-86. [PMID: 20833175 DOI: 10.1016/j.jim.2010.09.002] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2010] [Revised: 08/21/2010] [Accepted: 09/01/2010] [Indexed: 01/04/2023]
Abstract
This article reviews the multiple uses of flow cytometry in the diagnosis, monitoring and research of celiac disease, the most prevalent chronic autoimmune gastrointestinal disease. The phenotyping of intraepithelial lymphocytes (IELs) is of clinical relevance in the diagnosis of the disease given the characteristic features of elevated CD3+ IELs (αβ and γδ TcR) and the decrease in CD3- IELs. IEL biomarkers are also useful in the assessment of the response to the gluten-free diet and, importantly, in the diagnosis of the severe complications of celiac disease: refractory celiac disease and enteropathy-associated T-cell lymphoma. Novel applications of flow cytometry for the detection of anti-transglutaminase antibodies (a validated biomarker of celiac disease) and of gluten (the triggering antigen of the autoimmune process) are also discussed. The assessment of diagnostic and prognostic biomarkers by flow cytometry in celiac disease is performed routinely in a growing number of centers and it is an example of the versatility of this technique and its applicability to the research and clinical study of solid tissues.
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Affiliation(s)
- Francisco Leon
- Clinical Development, Alba Therapeutics, 800 W. Baltimore St, Suite 400, Baltimore, MD 21201, USA.
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Ng SC, Plamondon S, Al-Hassi HO, English N, Gellatly N, Kamm MA, Knight SC, Stagg AJ. A novel population of human CD56+ human leucocyte antigen D-related (HLA-DR+) colonic lamina propria cells is associated with inflammation in ulcerative colitis. Clin Exp Immunol 2009; 158:205-18. [PMID: 19737136 DOI: 10.1111/j.1365-2249.2009.04012.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Ulcerative colitis (UC) involves inappropriate mucosal immune responses to intestinal microbiota. Gut dendritic cells (DC) are central immunoregulators of the response to commensal bacteria, and the subset of CD11c(+) cells within the human leucocyte antigen D-related (HLA-DR(+)) lineage (lin)(-/dim) population are activated in inflammatory bowel disease. We hypothesized that CD11c(-) cells within this population may also be involved in intestinal inflammation. HLA-DR(+) lin(-/dim) cells were identified in freshly isolated lamina propria mononuclear cells by multi-colour flow cytometry in 54 UC patients and 22 controls. Proportion and number of CD11c(+) and CD11c(-) cells, and surface expression of activation markers CD40, CD86, Toll-like receptor (TLR)-2, TLR-4, and CD56(+)[natural killer (NK) marker], were determined. Cytokine production was assessed by intracellular staining. Lamina propria colonic CD11c(-) HLA-DR(+) lin(-/dim) cells were increased significantly in inflamed and 'non-inflamed' UC tissue, compared with control tissue. CD11c(+) HLA-DR(+) lin(-/dim) cells were unchanged. Fewer CD11c(-) cells expressed activation markers and produced intracellular cytokines than their CD11c(+) counterparts, and they were weakly stimulatory in mixed leucocyte reactions. Few CD11c(-) cells expressed blood plasmacytoid DC markers, but a major subset expressed high levels of CD56. CD11c(-) cells decreased after inflammation resolved. Intestinal inflammation in UC is associated with the presence of cells that share phenotypic features of both DC and NK cells. This novel population of human colonic CD56(+) HLA-DR(+) cells may play a role in immune regulation or tissue repair. Their increase in quiescent UC may be a marker of subclinical inflammation.
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Affiliation(s)
- S C Ng
- Antigen Presentation Research Group, Faculty of Medicine, Imperial College London, Northwick Park and St Mark's Campus, Watford Road, Harrow, UK
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Liu Z, Yang L, Cui Y, Wang X, Guo C, Huang Z, Kan Q, Liu Z, Liu Y. Il-21 enhances NK cell activation and cytolytic activity and induces Th17 cell differentiation in inflammatory bowel disease. Inflamm Bowel Dis 2009; 15:1133-44. [PMID: 19322899 DOI: 10.1002/ibd.20923] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Interleukin-21 (IL-21) is involved in T and NK cell activation and effector response and promotes Th17 cell differentiation. Here we investigated IL-21 receptor (IL-21R) expression in inflamed mucosa of inflammatory bowel disease (IBD) and evaluated its role in the induction of NK cell cytotoxicity and activation as well as Th17 differentiation. METHODS Expression of IL-21R was performed by immunohistochemistry and flow cytometry. NK cell cytotoxicity was detected by a standard (51)Cr-release assay. Cytokine levels were analyzed by enzyme-linked immunosorbent assay (ELISA) and quantitative real-time polymerase chain reaction (PCR). RESULTS IL-21R-positive cells were significantly increased in inflamed mucosa of IBD compared with controls, and mainly expressed in freshly isolated peripheral blood (PB)- and lamina propria (LP)-CD4(+), CD8(+) T, B, and NK cells. PB-NK cells from IBD patients produced higher levels of interferon gamma (IFN-gamma) and tumor necrosis factor (TNF) than controls when stimulated with immobilized human IgG and IL-21. IL-21-primed IBD NK cells showed a more potent antitumor cytotoxicity to NK-sensitive K562 cells than controls. Moreover, PB-T and LP-T cells from IBD patients produced large amounts of proinflammatory cytokines (e.g., TNF, IFN-gamma) than controls when stimulated with IL-21 and anti-CD3. Importantly, IL-21 facilitated IBD CD4(+) T cell to differentiate into Th17 cells, characterized by increased expression of IL-17A and ROR gamma t. CONCLUSIONS IL-21 enhances IBD NK cell cytotoxic response, triggers T cells to produce proinflammatory cytokines, and induces IBD CD4(+) T cells to differentiate into Th17 cells, suggesting that IL-21 is involved in the pathogenesis of IBD and that blocking IL-21R signaling may have a therapeutic potential in IBD.
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Affiliation(s)
- Zhanju Liu
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.
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Castellazzi AM, Valsecchi C, Montagna L, Malfa P, Ciprandi G, Avanzini MA, Marseglia GL. In vitroActivation of Mononuclear Cells by Two Probiotics:Lactobacillus paracaseiI 1688,Lactobacillus salivariusI 1794, and their Mixture (PSMIX). Immunol Invest 2009; 36:413-21. [PMID: 17691023 DOI: 10.1080/08820130701361160] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND Most studies on probiotics have described their effects on the human immune system after ingestion of LAB, but little is known about their effect on in vitro stimulation of human immune cells. AIM OF THE STUDY Evaluate the "in vitro" activity of Lactobacillus paracasei (I 1688), Lactobacillus salivarius (I 1794), and a commercial mix of the two (PSMIX, Proge Farm), on immune cells from healthy individuals. MATERIALS Two probiotic strains, Lactobacillus salivarius (I 1794; Proge Farm, Italy) and Lactobacillus paracasei (I 1688; Proge Farm, Italy), which are contained in the functional food ENTEROBACILLI, were evaluated for their ability to stimulate peripheral blood mononuclear cells and modulate surface phenotype and cytokine production. RESULTS All subjects responded to the bacteria, with different levels of response. The cell populations that showed a significant percent increase were CD4+/CD25+ cells (T-helper activated regulatory cells), CD8+/CD25+ (T-suppressor/cytotoxic activated cells), and CD16+/CD56+ (NK cells) (p<0.05). IL-12 and IFN-gamma in vitro production significantly increased with exposure to probiotics (p<0.05 for both). CONCLUSIONS This study provides the first evidence that Lactobacillus paracasei and Lactobacillus salivarius are capable of inducing a specific immune response that may be useful in the clinical setting for improving innate and adaptive immune responses.
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Affiliation(s)
- A M Castellazzi
- Department of Pediatric Sciences, Foundation IRCCS Policlinico San Matteo, University of Pavia, Italy.
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Different levels of humoral immunoreactivity to different wheat cultivars gliadin are present in patients with celiac disease and in patients with multiple myeloma. BMC Immunol 2009; 10:32. [PMID: 19480718 PMCID: PMC2696423 DOI: 10.1186/1471-2172-10-32] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2008] [Accepted: 05/31/2009] [Indexed: 11/28/2022] Open
Abstract
Background Immunity to food antigens (gliadin, cow's milk proteins) is in the centre of the attention of modern medicine focused on the prevention of diseases, prevention which is based on the use of appropriate restriction diet. Detection of the enhanced levels of the immune reactions to antigen(s) present in food is from this point of view of great importance because there are reports that some of health disturbances, like celiac disease (CD) and some premalignant conditions, like monoclonal gammopathy of undetermined significance (MGUS), were vanished after the appropriate restriction diets. It is well known that gliadin is toxic to small bowel mucosa of relatively small population of genetically predisposed individuals, who under this toxic action develop celiac disease (CD). As the quantity of immunogenic gliadin could vary between different wheat species, the first aim of this work was to determine the percentage of immunogenic gliadin in ten bread wheat cultivars and in three commercially grown durum wheat cultivars. The second part of the study was initiated by results of previous publication, reporting that sera of some of multiple myeloma (MM) patients showed the presence of elevated levels of anti-gliadin IgA, without the enhanced levels of anti-gliadin IgG antibodies, determined with commercial ELISA test. It was designed to assess is it possible to reveal is there any hidden, especially anti-gliadin IgG immunoreactivity, in serum of mentioned group of patients. For this purpose we tested MM patients sera, as well as celiac disease (CD) patients sera for the immunoreaction with the native gliadin isolated from wheat species used for bread and pasta making in corresponding geographic region. Results Gliadin was isolated from wheat flour by two step 60% ehanolic extraction. Its content was determined by commercial R5 Mendez Elisa using PWG gliadin as the standard. Results obtained showed that immunogenic gliadin content varies between 50.4 and 65.4 mg/g in bread wheat cultivars and between 20 and 25.6 mg/g in durum wheat cultivars. Anti-gliadin IgA and IgG immunoreactivity of patients' sera in (IU/ml) was firstly determined by commercial diagnostic Binding Site ELISA test, and then additionally by non-commercial ELISA tests, using standardized ethanol wheat extracts -gliadin as the antigen. In both patients groups IgA immunoreactivity to gliadin from different cultivars was almost homogenous and in correlation with results from commercial test (except for one patient with IgA(λ) myeloma, they were more then five times higher). But, results for IgG immunoreactivity were more frequently inhomogeneous, and especially for few MM patients, they were more then five times higher and did not correlate with results obtained using Binding Site test. Conclusion Results obtained showed different content of immunogenic gliadin epitopes in various species of wheat. They also point for new effort to elucidate is there a need to develop new standard antigen, the representative mixture of gliadin isolated from local wheat species used for bread production in corresponding geographic region for ELISA diagnostic tests.
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Abstract
In the intestinal tract, only a single layer of epithelial cells separates innate and adaptive immune effector cells from a vast amount of antigens. Here, the immune system faces a considerable challenge in tolerating commensal flora and dietary antigens while preventing the dissemination of potential pathogens. Failure to tightly control immune reactions may result in detrimental inflammation. In this respect, 'conventional' regulatory CD4(+) T cells, including naturally occurring and adaptive CD4(+) CD25(+) Foxp3(+) T cells, Th3 and Tr1 cells, have recently been the focus of considerable attention. However, regulatory mechanisms in the intestinal mucosa are highly complex, including adaptations of nonhaematopoietic cells and innate immune cells as well as the presence of unconventional T cells with regulatory properties such as resident TCRgammadelta or TCRalphabeta CD8(+) intraepithelial lymphocytes. This review aims to summarize the currently available knowledge on conventional and unconventional regulatory T cell subsets (Tregs), with special emphasis on clinical data and the potential role or malfunctioning of Tregs in four major human gastrointestinal diseases, i.e. inflammatory bowel diseases, coeliac disease, food allergy and colorectal cancer. We conclude that the clinical data confirms some but not all of the findings derived from experimental animal models.
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Affiliation(s)
- L Saurer
- Institute of Pathology, University of Bern, Switzerland
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48
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Olivencia Palomar P, Cano Ruiz A, Martín Scapa MA, León Prieto F, Roy Ariño G, Redondo Verge C. [Adult celiac disease and intraepithelial lymphocytes. New options for diagnosis?]. GASTROENTEROLOGIA Y HEPATOLOGIA 2009; 31:555-9. [PMID: 19091242 DOI: 10.1157/13128293] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
BACKGROUND Permanent changes have been found in intraepithelial lymphocyte (IEL) subsets in patients with celiac disease. OBJECTIVE The main aim of this study was to demonstrate the utility of determining CD3()/CD7(+) and T cell receptor (TCR) gamma-delta IEL subsets by flow cytometry as a diagnostic marker of adult celiac disease. PATIENTS AND METHODS We performed a prospective study in a sample of 128 adult patients (70 with celiac disease and 58 controls). In all patients, distal duodenal biopsy was performed and IEL subsets were determined by flow cytometry. RESULTS Patients with celiac disease showed an increase in gamma-delta IEL subsets and a decrease in CD3(-)/CD7(+) IEL subsets in comparison with the control group, independently of diet. CONCLUSIONS The results indicate that IEL subset determination by flow cytometry could be useful to confirm diagnosis of celiac disease. IEL subsets should be investigated in diseases other than celiac disease, as well as in patients with potential or latent celiac disease.
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Satoh-Takayama N, Vosshenrich CAJ, Lesjean-Pottier S, Sawa S, Lochner M, Rattis F, Mention JJ, Thiam K, Cerf-Bensussan N, Mandelboim O, Eberl G, Di Santo JP. Microbial flora drives interleukin 22 production in intestinal NKp46+ cells that provide innate mucosal immune defense. Immunity 2008; 29:958-70. [PMID: 19084435 DOI: 10.1016/j.immuni.2008.11.001] [Citation(s) in RCA: 882] [Impact Index Per Article: 55.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2008] [Revised: 11/13/2008] [Accepted: 11/19/2008] [Indexed: 12/24/2022]
Abstract
Natural killer (NK) cells are innate lymphocytes with spontaneous antitumor activity, and they produce interferon-gamma (IFN-gamma) that primes immune responses. Whereas T helper cell subsets differentiate from naive T cells via specific transcription factors, evidence for NK cell diversification is limited. In this report, we characterized intestinal lymphocytes expressing the NK cell natural cytotoxicity receptor NKp46. Gut NKp46+ cells were distinguished from classical NK cells by limited IFN-gamma production and absence of perforin, whereas several subsets expressed the nuclear hormone receptor retinoic acid receptor-related orphan receptor t (RORgammat) and interleukin-22 (IL-22). Intestinal NKp46+IL-22+ cells were generated via a local process that was conditioned by commensal bacteria and required RORgammat. Mice lacking IL-22-producing NKp46+ cells showed heightened susceptibility to the pathogen Citrobacter rodentium, consistent with a role for intestinal NKp46+ cells in immune protection. RORgammat-driven diversification of intestinal NKp46+ cells thereby specifies an innate cellular defense mechanism that operates at mucosal surfaces.
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MESH Headings
- Animals
- Antigens, Ly/immunology
- Antigens, Ly/metabolism
- Citrobacter rodentium/immunology
- Enterobacteriaceae Infections/immunology
- Enterobacteriaceae Infections/microbiology
- Immunity, Innate
- Immunity, Mucosal/immunology
- Interleukins/immunology
- Interleukins/metabolism
- Intestinal Mucosa/metabolism
- Intestines/immunology
- Intestines/microbiology
- Killer Cells, Natural/immunology
- Killer Cells, Natural/metabolism
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Natural Cytotoxicity Triggering Receptor 1/immunology
- Natural Cytotoxicity Triggering Receptor 1/metabolism
- Nuclear Receptor Subfamily 1, Group F, Member 3
- Perforin/immunology
- Perforin/metabolism
- Receptors, Retinoic Acid/immunology
- Receptors, Retinoic Acid/metabolism
- Receptors, Thyroid Hormone/immunology
- Receptors, Thyroid Hormone/metabolism
- Signal Transduction/immunology
- Interleukin-22
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Affiliation(s)
- Naoko Satoh-Takayama
- Cytokines and Lymphoid Development Unit, Institut Pasteur, Paris F-75724, France
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Abstract
Inflammatory bowel disease (IBD) is closely associated with the abnormal immune response of intestinal immune system to enterobacteria and dietary antigens. Large amounts of mononuclear lymphocyte infiltrates and high expression levels of proinflammatory cytokines and costimulatory molecules are present in inflamed mucosa. NK cells, involved in innate and acquired immune response, have cytolitic activities through secretion of lytic proteins, and produce proinflammatory mediators. Increased infiltration of NK cells present in inflamed mucosa of IBD expresses high levels of activated molecules and proinflammatory cytokines, and plays a role in intestinal mucosal damage.
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