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Sharma P, Arora A. Basic Understanding of Liver Transplant Immunology. J Clin Exp Hepatol 2023; 13:1091-1102. [PMID: 37975047 PMCID: PMC10643508 DOI: 10.1016/j.jceh.2023.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 05/14/2023] [Indexed: 11/19/2023] Open
Abstract
The liver is a specialized organ and plays an important role in our immune system. The liver constitutes parenchymal cells which are hepatocytes and cholangiocytes (60-80%) and non-parenchymal cells like liver sinusoidal endothelial cells (LSECs), hepatic satellite/Ito cells, Kupffer cells, neutrophils, mononuclear cells, T and B lymphocytes (conventional and non-conventional), natural killer cells, and natural killer T (NKT) cells. The liver mounts a rapid and strong immune response, under unfavorable conditions and acts as an immune tolerance to a variety of non-pathogenic antigens. This delicate and dynamic interaction between different kinds of immune cells in the liver maintains a balance between immune screening and immune tolerance. The liver allografts are privileged immunologically; however, allograft rejection is not uncommon and is classified as cell or antibody-mediated. Advancements in transplant immunology help in the prevention of allografts rejection by immune reactions of the host thus leading to better graft and host survival. Fewer patients may not require immunosuppression due to systemic donor-specific T-cell tolerance. The liver tolerance mechanism is poorly studied, and LSEC and unconventional lymphocytes play an important role that dampens T cell response either by inducing apoptosis of cells or inhibiting co-stimulatory pathways. Newer cell-based therapy based on Treg, dendritic cells, and mesenchymal stromal cells will probably change the future of immunosuppression. Various invasive and non-invasive biomarkers and artificial intelligence have also been investigated to predict graft survival, post-transplant complications, and immunotolerance in the future.
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Affiliation(s)
- Praveen Sharma
- Department of Gastroenterology, Sir Ganga Ram Hospital, New Delhi, India
| | - Anil Arora
- Department of Gastroenterology and Hepatology, Sir Ganga Ram Hospital, New Delhi, India
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Podhorzer A, Machicote A, Belén S, Lauferman L, Imventarza O, Montal S, Marciano S, Galdame O, Podesta LG, Fainboim L. Intrahepatic and peripheral blood phenotypes of natural killer and T cells: differential surface expression of killer cell immunoglobulin-like receptors. Immunology 2018; 154:261-273. [PMID: 29247515 DOI: 10.1111/imm.12880] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 11/28/2017] [Accepted: 11/29/2017] [Indexed: 01/16/2023] Open
Abstract
Deep characterization of the frequencies, phenotypes and functionalities of liver and peripheral blood natural killer (NK), natural killer T (NKT) and T cells from healthy individuals is an essential step to further interpret changes in liver diseases. These data indicate that CCR7, a chemokine essential for cell migration through lymphoid organs, is almost absent in liver NK and T cells. CD56bright NK cells, which represent half of liver NK cells, showed lower expression of the inhibitory molecule NKG2A and an increased frequency of the activation marker NKp44. By contrast, a decrease of CD16 expression with a potential decreased capacity to perform antibody-dependent cellular cytotoxicity was the main difference between liver and peripheral blood CD56dim NK cells. Liver T cells with an effector memory or terminally differentiated phenotype showed an increased frequency of MAIT cells,T-cell receptor-γδ (TCR-γδ) T cells and TCR-αβ CD8+ cells, with few naive T cells. Most liver NK and T cells expressed the homing markers CD161 and CD244. Liver T cells revealed a unique expression pattern of killer cell immunoglobulin-like receptors (KIR) receptors, with increased degranulation ability and higher secretion of interferon-γ. Hence, the liver possesses a large amount of memory and terminally differentiated CD8+ cells with a unique expression pattern of KIR activating receptors that have a potent functional capacity as well as a reduced amount of CCR7, which are unable to migrate to regional lymph nodes. These results are consistent with previous studies showing that liver T (and also NK) cells likely remain and die in the liver.
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Affiliation(s)
- Ariel Podhorzer
- Instituto de Inmunología, Genética y Metabolismo (INIGEM-CONICET), Hospital de Clínicas "José de San Martín", Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Andrés Machicote
- Instituto de Inmunología, Genética y Metabolismo (INIGEM-CONICET), Hospital de Clínicas "José de San Martín", Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Santiago Belén
- Instituto de Inmunología, Genética y Metabolismo (INIGEM-CONICET), Hospital de Clínicas "José de San Martín", Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Leandro Lauferman
- Servicio de Trasplante hepático, Garrahan Children's Hospital, Buenos Aires, Argentina
| | - Oscar Imventarza
- Servicio de Trasplante hepático, Garrahan Children's Hospital, Buenos Aires, Argentina
| | - Silvina Montal
- Unidad de Cirugía Hepato-Biliar y Trasplante, Hospital Universitario Austral, Buenos Aires, Argentina
| | - Sebastián Marciano
- Servicio de Hepatología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Omar Galdame
- Servicio de Hepatología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Luis G Podesta
- Unidad de Cirugía Hepato-Biliar y Trasplante, Hospital Universitario Austral, Buenos Aires, Argentina
| | - Leonardo Fainboim
- Instituto de Inmunología, Genética y Metabolismo (INIGEM-CONICET), Hospital de Clínicas "José de San Martín", Universidad de Buenos Aires, Buenos Aires, Argentina.,Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina de la, Universidad de Buenos Aires, Buenos Aires, Argentina
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Henriksen EKK, Jørgensen KK, Kaveh F, Holm K, Hamm D, Olweus J, Melum E, Chung BK, Eide TJ, Lundin KEA, Boberg KM, Karlsen TH, Hirschfield GM, Liaskou E. Gut and liver T-cells of common clonal origin in primary sclerosing cholangitis-inflammatory bowel disease. J Hepatol 2017; 66:116-122. [PMID: 27647428 DOI: 10.1016/j.jhep.2016.09.002] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 09/01/2016] [Accepted: 09/04/2016] [Indexed: 12/18/2022]
Abstract
BACKGROUND & AIMS Recruitment of gut-derived memory T-cells to the liver is believed to drive hepatic inflammation in primary sclerosing cholangitis (PSC). However, whether gut-infiltrating and liver-infiltrating T-cells share T cell receptors (TCRs) and antigenic specificities is unknown. We used paired gut and liver samples from PSC patients with concurrent inflammatory bowel disease (PSC-IBD), and normal tissue samples from colon cancer controls, to assess potential T cell clonotype overlap between the two compartments. METHODS High-throughput sequencing of TCRβ repertoires was applied on matched colon, liver and blood samples from patients with PSC-IBD (n=10), and on paired tumor-adjacent normal gut and liver tissue samples from colon cancer patients (n=10). RESULTS An average of 9.7% (range: 4.7-19.9%) memory T cell clonotypes overlapped in paired PSC-IBD affected gut and liver samples, after excluding clonotypes present at similar frequencies in blood. Shared clonotypes constituted on average 16.0% (range: 8.7-32.6%) and 15.0% (range: 5.9-26.3%) of the liver and gut memory T-cells, respectively. A significantly higher overlap was observed between paired PSC-IBD affected samples (8.7%, p=0.0007) compared to paired normal gut and liver samples (3.6%), after downsampling to equal number of reads. CONCLUSION Memory T-cells of common clonal origin were detected in paired gut and liver samples of patients with PSC-IBD. Our data indicate that this is related to PSC-IBD pathogenesis, suggesting that memory T-cells driven by shared antigens are present in the gut and liver of PSC-IBD patients. Our findings support efforts to therapeutically target memory T cell recruitment in PSC-IBD. LAY SUMMARY Primary sclerosing cholangitis (PSC) is a devastating liver disease strongly associated with inflammatory bowel disease (IBD). The cause of PSC is unknown, but it has been suggested that the immune reactions in the gut and the liver are connected. Our data demonstrate for the first time that a proportion of the T-cells in the gut and the liver react to similar triggers, and that this proportion is particularly high in patients with PSC and IBD.
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Affiliation(s)
- Eva Kristine Klemsdal Henriksen
- Norwegian PSC Research Center, Department of Transplantation Medicine, Division of Surgery, Inflammatory Medicine and Transplantation, Oslo University Hospital Rikshospitalet, Oslo, Norway; Research Institute of Internal Medicine, Division of Surgery, Inflammatory Medicine and Transplantation, Oslo University Hospital Rikshospitalet, Oslo, Norway; K.G. Jebsen Inflammation Research Centre, Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Kristin Kaasen Jørgensen
- Norwegian PSC Research Center, Department of Transplantation Medicine, Division of Surgery, Inflammatory Medicine and Transplantation, Oslo University Hospital Rikshospitalet, Oslo, Norway; Department of Gastroenterology, Akershus University Hospital, Lørenskog, Norway
| | - Fatemeh Kaveh
- K.G. Jebsen Inflammation Research Centre, Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway; Department of Medical Genetics, Oslo University Hospital Ullevål, Oslo, Norway
| | - Kristian Holm
- Norwegian PSC Research Center, Department of Transplantation Medicine, Division of Surgery, Inflammatory Medicine and Transplantation, Oslo University Hospital Rikshospitalet, Oslo, Norway; Research Institute of Internal Medicine, Division of Surgery, Inflammatory Medicine and Transplantation, Oslo University Hospital Rikshospitalet, Oslo, Norway; K.G. Jebsen Inflammation Research Centre, Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - David Hamm
- Adaptive Biotechnologies Corp., Seattle, WA, USA
| | - Johanna Olweus
- K.G. Jebsen Inflammation Research Centre, Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Department of Cancer Immunology, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet, Oslo, Norway; K.G. Jebsen Center for Cancer Immunotherapy, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Espen Melum
- Norwegian PSC Research Center, Department of Transplantation Medicine, Division of Surgery, Inflammatory Medicine and Transplantation, Oslo University Hospital Rikshospitalet, Oslo, Norway; Research Institute of Internal Medicine, Division of Surgery, Inflammatory Medicine and Transplantation, Oslo University Hospital Rikshospitalet, Oslo, Norway; K.G. Jebsen Inflammation Research Centre, Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Section of Gastroenterology, Department of Transplantation Medicine, Division of Surgery, Inflammatory Medicine and Transplantation, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Brian K Chung
- Norwegian PSC Research Center, Department of Transplantation Medicine, Division of Surgery, Inflammatory Medicine and Transplantation, Oslo University Hospital Rikshospitalet, Oslo, Norway; Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway; Centre for Liver Research and NIHR Birmingham Biomedical Research Unit, Institute of Biomedical Research, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK
| | - Tor J Eide
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway; Department of Pathology, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Knut E A Lundin
- Section of Gastroenterology, Department of Transplantation Medicine, Division of Surgery, Inflammatory Medicine and Transplantation, Oslo University Hospital Rikshospitalet, Oslo, Norway; Centre for Immune Regulation, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Kirsten Muri Boberg
- Norwegian PSC Research Center, Department of Transplantation Medicine, Division of Surgery, Inflammatory Medicine and Transplantation, Oslo University Hospital Rikshospitalet, Oslo, Norway; K.G. Jebsen Inflammation Research Centre, Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway; Section of Gastroenterology, Department of Transplantation Medicine, Division of Surgery, Inflammatory Medicine and Transplantation, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Tom H Karlsen
- Norwegian PSC Research Center, Department of Transplantation Medicine, Division of Surgery, Inflammatory Medicine and Transplantation, Oslo University Hospital Rikshospitalet, Oslo, Norway; Research Institute of Internal Medicine, Division of Surgery, Inflammatory Medicine and Transplantation, Oslo University Hospital Rikshospitalet, Oslo, Norway; K.G. Jebsen Inflammation Research Centre, Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway; Section of Gastroenterology, Department of Transplantation Medicine, Division of Surgery, Inflammatory Medicine and Transplantation, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Gideon M Hirschfield
- Centre for Liver Research and NIHR Birmingham Biomedical Research Unit, Institute of Biomedical Research, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK
| | - Evaggelia Liaskou
- Centre for Liver Research and NIHR Birmingham Biomedical Research Unit, Institute of Biomedical Research, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK.
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Sun E. Cell death recognition model for the immune system. Med Hypotheses 2007; 70:585-96. [PMID: 17681705 DOI: 10.1016/j.mehy.2007.05.049] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2007] [Accepted: 05/31/2007] [Indexed: 12/11/2022]
Abstract
It is essential for the immune system to recognize markers or understand rules required for discriminating antigens that should be actively responded to from those be tolerated. Although the classic self-nonself theory over the past five decades has been challenged by "danger" model and "infectious nonself" model, etc., no theories could fit for all. Cell death is important not only for its role in homeostasis, but also for its decisive effects on the immune responses. Different ways of cell death, apoptosis or necrosis, transmit fundamentally opposite driving forces for the immune system, inducing tolerance or initiating adaptive immune responses. The progress in understanding phagocytosis and process of apoptotic and necrotic cells leads the author to propose "cell death" recognition model for the immune system. Four principles are important in this model. First, only antigens shedding from apoptotic or necrotic cells rather than those from healthy cells, can be presented to naïve T cells. Second, either apoptotic cells or necrotic cells, but not healthy cells, can attract phagocytes, namely dendritic cells (DC) or macrophages that are also antigen presenting cells (APC), to scavenge dead cells. Third, macrophages or DC residing in non-lymphoid tissues phagocytose dying/dead cells, migrate to lymphoid tissues and present antigens to naïve T cells there. Fourth, tolerance or adaptive responses are not dependent on whether the antigens are self or nonself, but on the ways of cell death during antigen presentation. Importantly, tolerance and adaptive immunity are all dominant responses and the impact of cell death on immune responses is a dynamic balance between them. "Cell death" recognition model could more easily explain various immune phenomena, including infection, self tolerance and autoimmunity, tumor immunity as well as transplant rejection. Investigation into the roles and mechanisms of cell death mediated immune responses and finding out key modulators will prompt better understanding the ways of immune recognition and provide novel strategies for the management of autoimmunity, tumors, infections as well as transplantation.
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Affiliation(s)
- Erwei Sun
- Institute of Transplant Immunology, Organ Transplantation Department, Zhujiang Hospital, Southern Medical University, 253 Gongye Road, Guangzhou 510282, China.
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Williams AM, Bland PW, Phillips AC, Turner S, Brooklyn T, Shaya G, Spicer RD, Probert CSJ. Intestinal αβ T Cells Differentiate and Rearrange Antigen Receptor Genes In Situ in the Human Infant. THE JOURNAL OF IMMUNOLOGY 2004; 173:7190-9. [PMID: 15585840 DOI: 10.4049/jimmunol.173.12.7190] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Intestinal Ag exposure during neonatal life influences appropriate adult immune responses. To define the mechanisms shaping the T cell repertoire during this period, we examined T cell differentiation and receptor diversity in the intestine of human infants. Developmental phenotypes of intraepithelial and lamina propria intestinal T cells from infants aged 1 day to 2 years were assessed ex vivo by flow cytometry and in situ by triple-fluorescent immunohistochemistry. Gene recombination-specific enzymes were assessed by PCR. TCR beta-chain V region gene diversity was determined by sequencing. Several different early lineage T cell populations were present neonatally: CD3(+)4(-)8(-) T cells were present at birth and numbers decreased during the neonatal period; CD3(+)4(+)8(+) T cells were present in low numbers throughout infancy; and CD3(+)4(+)8(-) or CD3(+)4(-)8(+) T cells increased with age. Very early lineage T cells, CD3(-)2(-)7(+) and CD3(-)2(+)7(+), were present neonatally, but were essentially absent at 1 year. Most lamina propria T cells differentiated rapidly after birth, but maturation of intraepithelial T cells took place over 1 year. Intestinal samples from infants less than 6 mo old contained transcripts of T early alpha and TdT, and 15 of 19 infant samples contained mRNA for RAG-1, some coexpressing RAG-2. TCR beta-chain repertoires were polyclonal in infants. Immature T cells, pre-T cells, and genes involved in T cell recombination were found in the intestine during infancy. T cell differentiation occurs within the neonatal human intestine, and the TCR repertoire of these developing immature T cells is likely to be influenced by luminal Ags. Thus, mucosal T cell responsiveness to environmental Ag is shaped in situ during early life.
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MESH Headings
- Adolescent
- Aging/genetics
- Aging/immunology
- Cell Differentiation/genetics
- Cell Differentiation/immunology
- Child, Preschool
- Clone Cells
- Gene Rearrangement, alpha-Chain T-Cell Antigen Receptor
- Gene Rearrangement, beta-Chain T-Cell Antigen Receptor
- Humans
- Immunophenotyping
- Infant
- Infant, Newborn
- Intestinal Mucosa/cytology
- Intestinal Mucosa/immunology
- Intestinal Mucosa/metabolism
- Intestine, Large/cytology
- Intestine, Large/immunology
- Intestine, Large/metabolism
- Intestine, Small/cytology
- Intestine, Small/immunology
- Intestine, Small/metabolism
- Lymphocyte Count
- Organ Specificity/genetics
- Organ Specificity/immunology
- Receptors, Antigen, T-Cell, alpha-beta/biosynthesis
- Receptors, Antigen, T-Cell, alpha-beta/genetics
- Recombination, Genetic
- Stem Cells/cytology
- Stem Cells/immunology
- Stem Cells/metabolism
- T-Lymphocyte Subsets/cytology
- T-Lymphocyte Subsets/immunology
- T-Lymphocyte Subsets/metabolism
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Affiliation(s)
- Amanda M Williams
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA.
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