101
|
Merlin S, Cannizzo ES, Borroni E, Bruscaggin V, Schinco P, Tulalamba W, Chuah MK, Arruda VR, VandenDriessche T, Prat M, Valente G, Follenzi A. A Novel Platform for Immune Tolerance Induction in Hemophilia A Mice. Mol Ther 2017; 25:1815-1830. [PMID: 28552407 DOI: 10.1016/j.ymthe.2017.04.029] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 04/27/2017] [Accepted: 04/28/2017] [Indexed: 12/14/2022] Open
Abstract
Hemophilia A (HA) is an X-linked bleeding disease caused by factor VIII (FVIII) deficiency. We previously demonstrated that FVIII is produced specifically in liver sinusoid endothelial cells (LSECs) and to some degree in myeloid cells, and thus, in the present work, we seek to restrict the expression of FVIII transgene to these cells using cell-specific promoters. With this approach, we aim to limit immune response in a mouse model by lentiviral vector (LV)-mediated gene therapy encoding FVIII. To increase the target specificity of FVIII expression, we included miRNA target sequences (miRTs) (i.e., miRT-142.3p, miRT-126, and miRT-122) to silence expression in hematopoietic cells, endothelial cells, and hepatocytes, respectively. Notably, we report, for the first time, therapeutic levels of FVIII transgene expression at its natural site of production, which occurred without the formation of neutralizing antibodies (inhibitors). Moreover, inhibitors were eradicated in FVIII pre-immune mice through a regulatory T cell-dependent mechanism. In conclusion, targeting FVIII expression to LSECs and myeloid cells by using LVs with cell-specific promoter minimized off-target expression and immune responses. Therefore, at least for some transgenes, expression at the physiologic site of synthesis can enhance efficacy and safety, resulting in long-term correction of genetic diseases such as HA.
Collapse
Affiliation(s)
- Simone Merlin
- Department of Health Sciences, Università del Piemonte Orientale "A. Avogadro", 28100 Novara, Italy
| | - Elvira Stefania Cannizzo
- Department of Health Sciences, Università del Piemonte Orientale "A. Avogadro", 28100 Novara, Italy
| | - Ester Borroni
- Department of Health Sciences, Università del Piemonte Orientale "A. Avogadro", 28100 Novara, Italy
| | - Valentina Bruscaggin
- Department of Health Sciences, Università del Piemonte Orientale "A. Avogadro", 28100 Novara, Italy
| | - Piercarla Schinco
- Azienda Ospedaliera Universitaria Città della Salute e della Scienza, 10126 Torino, Italy
| | - Warut Tulalamba
- Department of Gene Therapy & Regenerative Medicine, Free University of Brussels, 1050 Brussels, Belgium; Department of Cardiovascular Sciences, KU Leuven, 3000 Leuven, Belgium
| | - Marinee K Chuah
- Department of Gene Therapy & Regenerative Medicine, Free University of Brussels, 1050 Brussels, Belgium; Department of Cardiovascular Sciences, KU Leuven, 3000 Leuven, Belgium
| | - Valder R Arruda
- The Children's Hospital of Philadelphia, Perelman School of Medicine at University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Thierry VandenDriessche
- Department of Gene Therapy & Regenerative Medicine, Free University of Brussels, 1050 Brussels, Belgium; Department of Cardiovascular Sciences, KU Leuven, 3000 Leuven, Belgium
| | - Maria Prat
- Department of Health Sciences, Università del Piemonte Orientale "A. Avogadro", 28100 Novara, Italy
| | - Guido Valente
- Department of Translational Medicine, Università del Piemonte Orientale "A. Avogadro", 28100 Novara, Italy
| | - Antonia Follenzi
- Department of Health Sciences, Università del Piemonte Orientale "A. Avogadro", 28100 Novara, Italy.
| |
Collapse
|
102
|
Le Guen V, Judor JP, Boeffard F, Gauttier V, Ferry N, Soulillou JP, Brouard S, Conchon S. Alloantigen gene transfer to hepatocytes promotes tolerance to pancreatic islet graft by inducing CD8 + regulatory T cells. J Hepatol 2017; 66:765-777. [PMID: 27914923 DOI: 10.1016/j.jhep.2016.11.019] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 11/10/2016] [Accepted: 11/13/2016] [Indexed: 12/04/2022]
Abstract
BACKGROUND & AIMS Induction of donor-specific immune tolerance is a good alternative to chronic life-long immunosuppression for transplant patients. Donor major histocompatibility complex (MHC) molecules represent the main targets of the allogeneic immune response of transplant recipients. Liver targeted gene transfer with viral vectors induces tolerance toward the encoded antigen. The aim of this work was to determine whether alloantigen gene transfer to hepatocytes induces tolerance and promotes graft acceptance. METHODS C57BL/6 (H-2b) mice were treated with adeno-associated viral (AAV) vector targeting the expression of the MHC class I molecule H-2Kd to hepatocytes, before transplantation with fully allogeneic pancreatic islet from BALB/c mice (H-2d). RESULTS AAV H-2Kd treated mice were tolerant to the alloantigen, as demonstrated by its long-term expression by the hepatocytes, even after a highly immunogenic challenge with an adenoviral vector. After chemical induction of diabetes, the AAV treated mice had significantly delayed rejection of fully allogeneic pancreatic islet grafts, with more than 40% of recipients tolerant (>100days). AAV-mediated expression of H-2Kd in the liver induced the local expansion of CD8+ T lymphocytes with allo-specific suppressive properties. The adoptive transfer of these liver-generated CD8+ Tregs into naive diabetic mice promoted the long-term survival of allogeneic pancreatic islet grafts. CONCLUSION AAV-mediated long-term expression of a single MHC class I molecule in the liver induces the generation of a subset of allo-specific CD8+ Treg cells, which promote tolerance toward fully allogeneic graft. Liver gene transfer represents a promising strategy for in vivo induction of donor-specific tolerance. LAY SUMMARY The liver has a special immune system, biased toward tolerance. In this study, we investigated the possibility of harnessing this property of the liver to induce tolerance to an allogeneic transplantation. We demonstrate for the first time that the in vivo gene transfer of an allogeneic antigen with an adeno-associated viral vector to mouse hepatocytes induces the expansion of a population of CD8+ regulatory T lymphocytes. These Tregs are then instrumental in preventing the rejection of allogeneic pancreatic islets transplanted in these animals. Allogeneic transplantation is the main treatment for the end-stage diseases of a number of organs. Life-long immunosuppressive treatments are still required to limit graft rejection, and these treatments exhibit serious side effects. Our present findings open a new avenue for promoting allo-specific tolerance via in vivo induction of CD8+ Treg expansion.
Collapse
Affiliation(s)
- Valentin Le Guen
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, Nantes, France; Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France
| | - Jean-Paul Judor
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, Nantes, France; Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France
| | - Françoise Boeffard
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, Nantes, France; Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France
| | - Vanessa Gauttier
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, Nantes, France; Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France
| | - Nicolas Ferry
- Département de Thérapie Cellulaire, CHU Saint Louis, Paris, France
| | - Jean-Paul Soulillou
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, Nantes, France; Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France
| | - Sophie Brouard
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, Nantes, France; Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France
| | - Sophie Conchon
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, Nantes, France; Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Nantes, France.
| |
Collapse
|
103
|
Liver macrophages in healthy and diseased liver. Pflugers Arch 2017; 469:553-560. [PMID: 28293730 DOI: 10.1007/s00424-017-1954-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 02/07/2017] [Indexed: 02/07/2023]
Abstract
Kupffer cells, the largest tissue resident macrophage population, are key for the maintenance of liver integrity and its restoration after injury and infections, as well as the local initiation and resolution of innate and adaptive immunity. These important roles of Kupffer cells were recently identified in healthy and diseased liver revealing diverse functions and phenotypes of hepatic macrophages. High-level phenotypic and genomic analysis revealed that Kupffer cells are not a homogenous population and that the hepatic microenvironment actively shapes both phenotype and function of liver macrophages. Compared to macrophages from other organs, hepatic macrophages bear unique properties that are instrumental for their diverse roles in local immunity as well as liver regeneration. The diverse and, in part, contradictory roles of hepatic macrophages in anti-tumor and inflammatory immune responses as well as regulatory and regenerative processes have been obscured by the lack of appropriate technologies to specifically target or ablate Kupffer cells or monocyte-derived hepatic macrophages. Future studies will need to dissect the exact role of the hepatic macrophages with distinct functional properties linked to their differentiation status and thereby provide insight into the functional plasticity of hepatic macrophages.
Collapse
|
104
|
Zhang X, Lou J, Bai L, Chen Y, Zheng S, Duan Z. Immune Regulation of Intrahepatic Regulatory T Cells in Fibrotic Livers of Mice. Med Sci Monit 2017; 23:1009-1016. [PMID: 28235976 PMCID: PMC5338567 DOI: 10.12659/msm.899725] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Background Liver fibrosis is the result of chronic inflammation and repair, and many immune cells contribute to the process. Regulatory T cells (Tregs) mediate immune tolerance and are highly expressed in liver fibrosis. However, few reports have studied the specific effects of Tregs on regulating immune cells in liver fibrosis. The present study aimed to investigate the regulation of Tregs on intrahepatic immune cells in liver fibrosis by depleting Tregs in mice. Material/Methods Liver fibrosis was induced by carbon tetrachloride, and an anti-CD25 mAb (PC61) was used to deplete Tregs. Liver fibrosis and injury were reflected by immunofluorescence staining and alanine aminotransferase level. The expressions of immune cell Tregs and cytokines were detected by flow cytometry and/or real-time PCR. Interferon-γ (IFN-γ) concentration was measured by ELISA. Results Tregs were rich in fibrotic livers; after Tregs depletion, the intrahepatic CD4+ T cell and Kupffer cells (KC) populations did not change compared with liver fibrosis, but CD8+ T cells were slightly elevated. However, natural killer (NK) cells and IFN-γ levels were significantly decreased in fibrosis and increased after Tregs depletion. Interesting, we found Tregs promoted KC M1/M2 balance to M2, because inducible nitric oxide synthase (M1) was increased but arginase-1 (M2) was reduced after depleting Tregs. Furthermore, in isolated KCs from livers, IL-12 (M1) was increased, but TGF-β (M2) was reduced after depleting Tregs, compared with fibrotic livers. Conclusions Tregs are involved in the immune regulation of liver fibrosis, primarily by suppressing NK cells and M1 KCs, and mildly suppressing CD8+ T cells.
Collapse
Affiliation(s)
- Xiaohui Zhang
- Artificial Liver Treatment Center, Beijing YouAn Hospital, Capital Medical University, Beijing, China (mainland)
| | - Jinli Lou
- Clinical Laboratory Center, Beijing YouAn Hospital, Capital Medical University, Beijing, China (mainland)
| | - Li Bai
- Artificial Liver Treatment Center, Beijing YouAn Hospital, Capital Medical University, Beijing, China (mainland)
| | - Yu Chen
- Artificial Liver Treatment Center, Beijing YouAn Hospital, Capital Medical University, Beijing, China (mainland)
| | - Sujun Zheng
- Artificial Liver Treatment Center, Beijing YouAn Hospital, Capital Medical University, Beijing, China (mainland)
| | - Zhongping Duan
- Artificial Liver Treatment Center, Beijing YouAn Hospital, Capital Medical University, Beijing, China (mainland)
| |
Collapse
|
105
|
Liver immunology: How to reconcile tolerance with autoimmunity. Clin Res Hepatol Gastroenterol 2017; 41:6-16. [PMID: 27526967 DOI: 10.1016/j.clinre.2016.06.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Accepted: 06/01/2016] [Indexed: 02/04/2023]
Abstract
There are several examples of liver tolerance: the relative ease by which liver allografts are accepted and the exploitation of the hepatic microenvironment by the malarial parasite and hepatotrophic viruses are notable examples. The vasculature of the liver supports a unique population of antigen presenting cells specialised to maintain immunological tolerance despite continuous exposure to gut-derived antigens. Liver sinusoidal endothelial cells and Kupffer cells appear to be key to the maintenance of immune tolerance, by promoting T cell anergy or deletion and the generation of regulatory cell subsets. Despite this, there are three liver diseases with likely autoimmune involvement: primary biliary cirrhosis, primary sclerosing cholangitis and autoimmune hepatitis. How can we reconcile this with the inherent tolerogenicity of the liver? Genetic studies have uncovered several associations with genes involved in the activation of the innate and adaptive immune systems. There is also evidence pointing to pathogenic and xenobiotic triggers of autoimmune liver disease. Coupled to this, impaired immunoregulatory mechanisms potentially play a permissive role, allowing the autoimmune response to proceed.
Collapse
|
106
|
Greig JA, Wang Q, Reicherter AL, Chen SJ, Hanlon AL, Tipper CH, Clark KR, Wadsworth S, Wang L, Wilson JM. Characterization of Adeno-Associated Viral Vector-Mediated Human Factor VIII Gene Therapy in Hemophilia A Mice. Hum Gene Ther 2017; 28:392-402. [PMID: 28056565 DOI: 10.1089/hum.2016.128] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Adeno-associated viral (AAV) vectors are promising vehicles for hemophilia gene therapy, with favorable clinical trial data seen in the treatment of hemophilia B. In an effort to optimize the expression of human coagulation factor VIII (hFVIII) for the treatment of hemophilia A, an extensive study was performed with numerous combinations of liver-specific promoter and enhancer elements with a codon-optimized hFVIII transgene. After generating 42 variants of three reduced-size promoters and three small enhancers, transgene cassettes were packaged within a single AAV capsid, AAVrh10, to eliminate performance differences due to the capsid type. Each hFVIII vector was administered to FVIII knockout (KO) mice at a dose of 1010 genome copies (GC) per mouse. Criteria for distinguishing the performance of the different enhancer/promoter combinations were established prior to the initiation of the studies. These criteria included prominently the level of hFVIII activity (0.12-2.12 IU/mL) and the pattern of development of anti-hFVIII antibodies. In order to evaluate the impact of capsid on hFVIII expression and antibody formation, one of the enhancer and promoter combinations that exhibited high hFVIII immunogenicity was evaluated using AAV8, AAV9, AAVrh10, AAVhu37, and AAVrh64R1 capsids. The capsids subdivided into two groups: those that generated anti-hFVIII antibodies in ≤20% of mice (AAV8 and AAV9), and those that generated anti-hFVIII antibodies in >20% of mice (AAVrh10, AAVhu37, and AAVrh64R1). The results of this study, which entailed extensive vector optimization and in vivo testing, demonstrate the significant impact that transcriptional control elements and capsid can have on vector performance.
Collapse
Affiliation(s)
- Jenny A Greig
- 1 Gene Therapy Program, Department of Medicine, University of Pennsylvania , Philadelphia, Pennsylvania
| | - Qiang Wang
- 1 Gene Therapy Program, Department of Medicine, University of Pennsylvania , Philadelphia, Pennsylvania
| | - Amanda L Reicherter
- 1 Gene Therapy Program, Department of Medicine, University of Pennsylvania , Philadelphia, Pennsylvania
| | - Shu-Jen Chen
- 1 Gene Therapy Program, Department of Medicine, University of Pennsylvania , Philadelphia, Pennsylvania
| | - Alexandra L Hanlon
- 2 School of Nursing, University of Pennsylvania , Philadelphia, Pennsylvania
| | | | - K Reed Clark
- 3 Dimension Therapeutics , Cambridge, Massachusetts
| | | | - Lili Wang
- 4 Department of Pathology and Laboratory Medicine, University of Pennsylvania , Philadelphia, Pennsylvania
| | - James M Wilson
- 1 Gene Therapy Program, Department of Medicine, University of Pennsylvania , Philadelphia, Pennsylvania
| |
Collapse
|
107
|
Perrin GQ, Zolotukhin I, Sherman A, Biswas M, de Jong YP, Terhorst C, Davidoff AM, Herzog RW. Dynamics of antigen presentation to transgene product-specific CD4 + T cells and of Treg induction upon hepatic AAV gene transfer. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2016; 3:16083. [PMID: 27933310 PMCID: PMC5142511 DOI: 10.1038/mtm.2016.83] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 10/26/2016] [Accepted: 11/02/2016] [Indexed: 12/25/2022]
Abstract
The tolerogenic hepatic microenvironment impedes clearance of viral infections but is an advantage in viral vector gene transfer, which often results in immune tolerance induction to transgene products. Although the underlying tolerance mechanism has been extensively studied, our understanding of antigen presentation to transgene product-specific CD4+ T cells remains limited. To address this, we administered hepatotropic adeno-associated virus (AAV8) vector expressing cytoplasmic ovalbumin (OVA) into wt mice followed by adoptive transfer of transgenic OVA-specific T cells. We find that that the liver-draining lymph nodes (celiac and portal) are the major sites of MHC II presentation of the virally encoded antigen, as judged by in vivo proliferation of DO11.10 CD4+ T cells (requiring professional antigen-presenting cells, e.g., macrophages) and CD4+CD25+FoxP3+ Treg induction. Antigen presentation in the liver itself contributes to activation of CD4+ T cells egressing from the liver. Hepatic-induced Treg rapidly disseminate through the systemic circulation. By contrast, a secreted OVA transgene product is presented in multiple organs, and OVA-specific Treg emerge in both the thymus and periphery. In summary, liver draining lymph nodes play an integral role in hepatic antigen presentation and peripheral Treg induction, which results in systemic regulation of the response to viral gene products.
Collapse
Affiliation(s)
- George Q Perrin
- Department of Pediatrics, University of Florida , Gainesville, Florida, USA
| | - Irene Zolotukhin
- Department of Pediatrics, University of Florida , Gainesville, Florida, USA
| | - Alexandra Sherman
- Department of Pediatrics, University of Florida , Gainesville, Florida, USA
| | - Moanaro Biswas
- Department of Pediatrics, University of Florida , Gainesville, Florida, USA
| | - Ype P de Jong
- Division of Gastroenterology and Hepatology, Weill Cornell Medicine , New York, New York, USA
| | - Cox Terhorst
- Division of Immunology, Beth Israel Deaconess Medical Center, Harvard Medical School , Boston, Massachusetts, USA
| | - Andrew M Davidoff
- Department of Surgery, St. Jude Children's Research Hospital , Memphis, Tennessee, USA
| | - Roland W Herzog
- Department of Pediatrics, University of Florida , Gainesville, Florida, USA
| |
Collapse
|
108
|
Ma YH, Zhang J, Chen X, Xie YF, Pang YH, Liu XJ. Increased CD4 +CD45RA -FoxP3 low cells alter the balance between Treg and Th17 cells in colitis mice. World J Gastroenterol 2016; 22:9356-9367. [PMID: 27895423 PMCID: PMC5107699 DOI: 10.3748/wjg.v22.i42.9356] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Revised: 08/05/2016] [Accepted: 08/19/2016] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate the role of regulatory T cell (Treg) subsets in the balance between Treg and T helper 17 (Th17) cells in various tissues from mice with dextran sulfate sodium-induced colitis.
METHODS Treg cells, Treg cell subsets, Th17 cells, and CD4+CD25+FoxP3+IL-17+ cells from the lamina propria of colon (LPC) and other ulcerative colitis (UC) mouse tissues were evaluated by flow cytometry. Forkhead box protein 3 (FoxP3), interleukin 17A (IL-17A), and RORC mRNA levels were assessed by real-time PCR, while interleukin-10 (IL-10) and IL-17A levels were detected with a Cytometric Beads Array.
RESULTS In peripheral blood monocytes (PBMC), mesenteric lymph node (MLN), lamina propria of jejunum (LPJ) and LPC from UC mice, Treg cell numbers were increased (P < 0.05), and FoxP3 and IL-10 mRNA levels were decreased. Th17 cell numbers were also increased in PBMC and LPC, as were IL-17A levels in PBMC, LPJ, and serum. The number of FrI subset cells (CD4+CD45RA+FoxP3low) was increased in the spleen, MLN, LPJ, and LPC. FrII subset cells (CD4+CD45RA-FoxP3high) were decreased among PBMC, MLN, LPJ, and LPC, but the number of FrIII cells (CD4+CD45RA-FoxP3low) and CD4+CD25+FoxP3+IL-17A+ cells was increased. FoxP3 mRNA levels in CD4+CD45RA-FoxP3low cells decreased in PBMC, MLN, LPJ, and LPC in UC mice, while IL-17A and RORC mRNA increased. In UC mice the distribution of Treg, Th17 cells, CD4+CD45RA-FoxP3high, and CD4+CD45RA-FoxP3low cells was higher in LPC relative to other tissues.
CONCLUSION Increased numbers of CD4+CD45RA-FoxP3low cells may cause an imbalance between Treg and Th17 cells that is mainly localized to the LPC rather than secondary lymphoid tissues.
Collapse
MESH Headings
- Animals
- CD4 Lymphocyte Count
- Colitis, Ulcerative/chemically induced
- Colitis, Ulcerative/immunology
- Colitis, Ulcerative/metabolism
- Colitis, Ulcerative/pathology
- Colon/immunology
- Colon/metabolism
- Colon/pathology
- Dextran Sulfate
- Disease Models, Animal
- Forkhead Transcription Factors/genetics
- Forkhead Transcription Factors/immunology
- Forkhead Transcription Factors/metabolism
- Gene Expression Regulation
- Interleukin-17/genetics
- Interleukin-17/immunology
- Interleukin-17/metabolism
- Leukocyte Common Antigens/genetics
- Leukocyte Common Antigens/immunology
- Leukocyte Common Antigens/metabolism
- Male
- Mice, Inbred C57BL
- Nuclear Receptor Subfamily 1, Group F, Member 3/genetics
- Nuclear Receptor Subfamily 1, Group F, Member 3/immunology
- Nuclear Receptor Subfamily 1, Group F, Member 3/metabolism
- Phenotype
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- T-Lymphocytes, Regulatory/immunology
- T-Lymphocytes, Regulatory/metabolism
- Th17 Cells/immunology
- Th17 Cells/metabolism
Collapse
|
109
|
Moro-Sibilot L, Blanc P, Taillardet M, Bardel E, Couillault C, Boschetti G, Traverse-Glehen A, Defrance T, Kaiserlian D, Dubois B. Mouse and Human Liver Contain Immunoglobulin A-Secreting Cells Originating From Peyer's Patches and Directed Against Intestinal Antigens. Gastroenterology 2016; 151:311-23. [PMID: 27132185 DOI: 10.1053/j.gastro.2016.04.014] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 04/15/2016] [Accepted: 04/18/2016] [Indexed: 12/15/2022]
Abstract
BACKGROUND & AIMS The liver receives blood from the gastrointestinal tract through the portal vein, and thereby is exposed continuously to dietary antigens and commensal bacteria. Alcoholic liver disease (ALD) is associated with intestinal dysbiosis, increased intestinal permeability, release of microbes into the portal circulation, and increased serum levels and liver deposits of IgA. We characterized B-cell production of IgA in livers of mice at homeostasis, after oral immunization, in a mouse model of ALD and in human liver samples. METHODS We performed studies with Balb/c and C57BL/6-Ly5.1 mice, as well as transgenic mice (quasimonoclonal, activation-induced [cytidine] deaminase-Cre-tamoxifen-dependent estrogen receptor 2 [ERT2], Blimp-1-green fluorescent protein [GFP]). C57BL/6-Ly5.1 mice were fed chronic plus binge ethanol to create a model of ALD. Some mice also were given repeated injections of FTY720, which prevents egress of IgA-secreting cells from Peyer's patches. We obtained nontumor liver tissues from patients with colorectal carcinoma undergoing surgery for liver metastases or hepatocellular carcinoma. B cells were isolated from mouse and human liver tissues and analyzed by flow cytometry and enzyme-linked ImmunoSpot (ELISpot). In wild-type and transgenic mice, we traced newly generated IgA-secreting cells at steady state and after oral immunization with 4-hydroxy-3-nitrophenylacetyl (NP)-Ficoll or cholera toxin. IgA responses were also evaluated in our model of ALD. RESULTS Livers of control mice contained proliferative plasmablasts that originated from Peyer's patches and produced IgAs reactive to commensal bacteria. After oral immunization with cholera toxin or a thymus-independent antigen, a substantial number of antigen-specific IgA-secreting cells was found in the liver. Mice fed ethanol had features of hepatitis and increased numbers of IgA-secreting cells in liver, compared with mice given control diets, as well as higher levels of serum IgA and IgA deposits in liver sinusoids. Injection of FTY720 during ethanol feeding reduced liver and serum levels of IgA and IgA deposits in liver and prevented liver injury. Human liver tissues contained a significant proportion of IgA-producing plasma cells that shared phenotypic and functional attributes with those from mouse liver, including reactivity to commensal bacteria. CONCLUSIONS Based on studies of mice and human liver tissues, we found the liver to be a site of IgA production by B cells, derived from gut-associated lymphoid tissues. These IgAs react with commensal bacteria and oral antigens. Livers from mice with ethanol-induced injury contain increased numbers of IgA-secreting cells and have IgA deposits in sinusoids. IgAs in the liver could mediate clearance of gut-derived antigens that arrive through portal circulation at homeostasis and protect these organs from pathogens.
Collapse
Affiliation(s)
- Ludovic Moro-Sibilot
- International Center for Infectiology Research (CIRI), Lyon, France; Inserm U1111, Lyon, France; CNRS UMR5308, Lyon, France; Ecole Normale Superieure, Lyon, France; Universite Claude Bernard Lyon 1, Lyon, France
| | - Pascal Blanc
- International Center for Infectiology Research (CIRI), Lyon, France; Inserm U1111, Lyon, France; CNRS UMR5308, Lyon, France; Ecole Normale Superieure, Lyon, France; Universite Claude Bernard Lyon 1, Lyon, France
| | - Morgan Taillardet
- International Center for Infectiology Research (CIRI), Lyon, France; Inserm U1111, Lyon, France; CNRS UMR5308, Lyon, France; Ecole Normale Superieure, Lyon, France; Universite Claude Bernard Lyon 1, Lyon, France
| | - Emilie Bardel
- International Center for Infectiology Research (CIRI), Lyon, France; Inserm U1111, Lyon, France; CNRS UMR5308, Lyon, France; Ecole Normale Superieure, Lyon, France; Universite Claude Bernard Lyon 1, Lyon, France
| | - Coline Couillault
- Univ Lyon, Universite Claude Bernard Lyon 1, Inserm U1052, CNRS 5286, Centre de Recherche en Cancérologie de Lyon, Lyon, France
| | - Gilles Boschetti
- International Center for Infectiology Research (CIRI), Lyon, France; Inserm U1111, Lyon, France; CNRS UMR5308, Lyon, France; Ecole Normale Superieure, Lyon, France; Universite Claude Bernard Lyon 1, Lyon, France
| | | | - Thierry Defrance
- International Center for Infectiology Research (CIRI), Lyon, France; Inserm U1111, Lyon, France; CNRS UMR5308, Lyon, France; Ecole Normale Superieure, Lyon, France; Universite Claude Bernard Lyon 1, Lyon, France
| | - Dominique Kaiserlian
- International Center for Infectiology Research (CIRI), Lyon, France; Inserm U1111, Lyon, France; CNRS UMR5308, Lyon, France; Ecole Normale Superieure, Lyon, France; Universite Claude Bernard Lyon 1, Lyon, France.
| | - Bertrand Dubois
- International Center for Infectiology Research (CIRI), Lyon, France; Inserm U1111, Lyon, France; CNRS UMR5308, Lyon, France; Ecole Normale Superieure, Lyon, France; Universite Claude Bernard Lyon 1, Lyon, France.
| |
Collapse
|
110
|
Liang Y, Kwota Z, Sun J. Intrahepatic regulation of antiviral T cell responses at initial stages of viral infection. Int Immunopharmacol 2016; 39:106-112. [PMID: 27459170 DOI: 10.1016/j.intimp.2016.07.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 07/19/2016] [Accepted: 07/19/2016] [Indexed: 12/17/2022]
Abstract
It is generally accepted that the appropriate boost of early immune response will control viral replications and limit the immune-mediated pathology in viral hepatitis. However, poor immunity results in viral persistence, chronic inflammation and finally liver cirrhosis and carcinoma. As a peripheral non-lymphoid organ of immune surveillance, the liver continually encounters hundreds of molecules from the blood, including nutrients, toxins and pathogens. In this way, the liver maintains immune tolerance under healthy conditions, but responds quickly to the hepatotropic pathogens during the early stages of an infection. Although our knowledge of liver cell compositions and functions has been improved significantly in recent years, the intrahepatic immune regulation of antiviral T cells at the initial stage is complex and not well elucidated. Here, we summarize the role of liver cell subpopulations in regulating antiviral T cell response at the initial stages of viral infection. A better understanding of early hepatic immune regulation will pave the way for the development of novel therapies and vaccine design for human viral hepatitis.
Collapse
Affiliation(s)
- Yuejin Liang
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555-1070, USA.
| | - Zakari Kwota
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555-1070, USA
| | - Jiaren Sun
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555-1070, USA
| |
Collapse
|
111
|
Immunohistopathology of the Newly Discovered Giant Papillae Tongue Disorder in Organ-Transplanted Children. Transplantation 2016; 101:1441-1448. [PMID: 27336393 DOI: 10.1097/tp.0000000000001205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Giant papillae tongue disorder (GPTD) is a newly discovered, long-lasting clinical disorder that may develop in organ-transplanted pediatric recipients. The key feature of this disorder is the unique tongue lesion, which comprises swollen fungiform papillae. The aim of this study was to characterize the immunohistopathology of this novel inflammatory condition. METHODS Six organ transplanted children with GPTD were included in the study. Routine histopathology and immunohistochemical stainings for CD3, CD4, CD8, CD25, FOXP3, CD20, CD138, CD68, CD1a, CD15, CD23, and mast cell tryptase were performed. RESULTS Immunohistochemical analyses of the oral lesions revealed a subepithelial infiltrate that was primarily composed of CD3- and CD4-positive T cells, CD20-expressing B cells, macrophages, and CD138-positive plasma cells. The CD20-positive cells did not display the typical B cell morphology, having in general a more dendritic cell-like appearance. The CD138-expressing plasma cells were distinctly localized as a dense infiltrate beneath the accumulation of T cells and B cells. Increased numbers of CD1a-expressing Langerhans cells were detected both in the epithelium and connective tissue. Because no granulomas were observed and only single lesional eosinophils were detected, GPTD does not resemble a granulomatous or eosinophilic condition. CONCLUSIONS We describe for the first time the immunopathological characteristics of a novel inflammatory disorder of the oral cavity, which may develop after solid organ transplantation in children.
Collapse
|
112
|
Okada T, Kimura A, Kanki K, Nakatani S, Nagahara Y, Hiraga M, Watanabe Y. Liver Resident Macrophages (Kupffer Cells) Share Several Functional Antigens in Common with Endothelial Cells. Scand J Immunol 2016; 83:139-50. [PMID: 26678711 DOI: 10.1111/sji.12402] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 12/05/2015] [Indexed: 12/21/2022]
Abstract
The identification and specific functions of Kupffer cells (KCs), a liver resident macrophage subpopulation, are still unclear. We compared KCs with peritoneal macrophages using cDNA microarray analysis and found that these cells share some antigens with endothelial cells. KCs highly express VCAM-1 and VEGF receptors (VEGF-Rs) at transcriptional and protein levels. VCAM-1 mediates the functional binding of KCs with lymphocytes and induces KC activation. Among the VEGF receptors, VEGF-R2 and VEGF-R3 were expressed on the KCs, while VEGF-R1 was expressed on other tissue macrophage subsets. VEGF120, a ligand of both VEGF-R1 and VEGF-R2, transduced strong survival and chemotactic signals through the KCs, when compared to PIGF, a VEGF-R1 ligand, indicating that VEGF-R2 plays significant roles in regulating KC activities. Expression of the VEGF-Rs was regulated by TLR4 signalling. These results suggest that the function of KCs is partly regulated by the common antigens shared with endothelial cells.
Collapse
Affiliation(s)
- T Okada
- Department of Pharmaceutical Sciences, Musashino University, Tokyo, Japan
| | - A Kimura
- Denka Seiken Co. Ltd., Niigata, Japan
| | - K Kanki
- Tottori University Faculty of Medicine, Institute of Regenerative Medicine and Biofunction, Yonago, Japan
| | - S Nakatani
- Department of Biotechnology, College of Science and Engineering, Tokyo Denki University, Saitama, Japan
| | - Y Nagahara
- Department of Biotechnology, College of Science and Engineering, Tokyo Denki University, Saitama, Japan
| | - M Hiraga
- Department of Pharmaceutical Sciences, Musashino University, Tokyo, Japan
| | - Y Watanabe
- Department of Pharmaceutical Sciences, Musashino University, Tokyo, Japan
| |
Collapse
|
113
|
Zeng Z, Li L, Chen Y, Wei H, Sun R, Tian Z. Interferon-γ facilitates hepatic antiviral T cell retention for the maintenance of liver-induced systemic tolerance. J Exp Med 2016; 213:1079-93. [PMID: 27139489 PMCID: PMC4886358 DOI: 10.1084/jem.20151218] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Accepted: 04/11/2016] [Indexed: 12/29/2022] Open
Abstract
IFN-γ mediates hepatic T cell retention and the maintenance of systemic tolerance during hepatitis B virus persistence in the liver. Persistent exposure to liver pathogens leads to systemic antigen-specific tolerance, a major cause of chronicity during hepatotropic infection. The mechanism regarding how this systemic tolerance is maintained remains poorly elucidated. In a well established mouse model of hepatitis B virus (HBV) persistence–induced systemic tolerance, we observed that interferon-γ (IFN-γ) deficiency led to complete loss of tolerance, resulting in robust anti-HBV responses upon peripheral vaccination. The recovery of vaccine-induced anti-HBV responses was mainly caused by the retained antigen-specific CD4+ T cells rather than decreased functional inhibitory cells in the periphery. Mechanistically, HBV persistence induced sustained hepatic CD4+ T cell–derived IFN-γ production. IFN-γ was found to promote CXCL9 secretion from liver-resident macrophages. This T cell chemokine facilitated the retention of antiviral CD4+ T cells in the liver in a CXCR3-dependent manner. Hepatic sequestrated antiviral CD4+ T cells subsequently underwent local apoptotic elimination partially via cytotoxic T lymphocyte–associated protein 4 ligation. These findings reveal an unexpected tolerogenic role for IFN-γ during viral persistence in the liver, providing new mechanistic insights regarding the maintenance of systemic antigen-specific tolerance during HBV persistence.
Collapse
Affiliation(s)
- Zhutian Zeng
- Institute of Immunology and the Key Laboratory of Innate Immunity and Chronic Disease, Chinese Academy of Science, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei 230027, China
| | - Lu Li
- Institute of Immunology and the Key Laboratory of Innate Immunity and Chronic Disease, Chinese Academy of Science, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei 230027, China Hefei National Laboratory for Physical Sciences at the Microscale, Hefei 230027, China
| | - Yongyan Chen
- Institute of Immunology and the Key Laboratory of Innate Immunity and Chronic Disease, Chinese Academy of Science, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei 230027, China
| | - Haiming Wei
- Institute of Immunology and the Key Laboratory of Innate Immunity and Chronic Disease, Chinese Academy of Science, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei 230027, China
| | - Rui Sun
- Institute of Immunology and the Key Laboratory of Innate Immunity and Chronic Disease, Chinese Academy of Science, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei 230027, China
| | - Zhigang Tian
- Institute of Immunology and the Key Laboratory of Innate Immunity and Chronic Disease, Chinese Academy of Science, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei 230027, China Hefei National Laboratory for Physical Sciences at the Microscale, Hefei 230027, China Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, China
| |
Collapse
|
114
|
Akbarpour M, Goudy KS, Cantore A, Russo F, Sanvito F, Naldini L, Annoni A, Roncarolo MG. Insulin B chain 9-23 gene transfer to hepatocytes protects from type 1 diabetes by inducing Ag-specific FoxP3+ Tregs. Sci Transl Med 2016; 7:289ra81. [PMID: 26019217 DOI: 10.1126/scitranslmed.aaa3032] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Antigen (Ag)-specific tolerance in type 1 diabetes (T1D) in human has not been achieved yet. Targeting lentiviral vector (LV)-mediated gene expression to hepatocytes induces active tolerance toward the encoded Ag. The insulin B chain 9-23 (InsB9-23) is an immunodominant T cell epitope in nonobese diabetic (NOD) mice. To determine whether auto-Ag gene transfer to hepatocytes induces tolerance and control of T1D, NOD mice were treated with integrase-competent LVs (ICLVs) that selectively target the expression of InsB9-23 to hepatocytes. ICLV treatment induced InsB9-23-specific effector T cells but also FoxP3(+) regulatory T cells (Tregs), which halted islet immune cell infiltration, and protected from T1D. Moreover, ICLV treatment combined with a single suboptimal dose of anti-CD3 monoclonal antibody (mAb) is effective in T1D reversal. Splenocytes from LV.InsB9-23-treated mice, but not from LV.OVA (ovalbumin)-treated control mice, stopped diabetes development, demonstrating that protection is Ag-specific. Depletion of CD4(+)CD25(+)FoxP3(+) T cells led to diabetes progression, indicating that Ag-specific FoxP3(+) Tregs mediate protection. Integrase-defective LVs (IDLVs).InsB9-23, which alleviate the concerns for insertional mutagenesis and support transient transgene expression in hepatocytes, were also efficient in protecting from T1D. These data demonstrate that hepatocyte-targeted auto-Ag gene expression prevents and resolves T1D and that stable integration of the transgene is not required for this protection. Gene transfer to hepatocytes can be used to induce Ag-specific tolerance in autoimmune diseases.
Collapse
Affiliation(s)
- Mahzad Akbarpour
- San Raffaele Telethon Institute for Gene Therapy, Division of Regenerative Medicine, Stem Cells and Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan 20132, Italy. Vita-Salute San Raffaele University, Milan 20132, Italy
| | - Kevin S Goudy
- San Raffaele Telethon Institute for Gene Therapy, Division of Regenerative Medicine, Stem Cells and Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan 20132, Italy
| | - Alessio Cantore
- San Raffaele Telethon Institute for Gene Therapy, Division of Regenerative Medicine, Stem Cells and Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan 20132, Italy
| | - Fabio Russo
- San Raffaele Telethon Institute for Gene Therapy, Division of Regenerative Medicine, Stem Cells and Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan 20132, Italy
| | - Francesca Sanvito
- Pathology Unit, Department of Oncology, IRCCS San Raffaele Scientific Institute, Milan 20132, Italy
| | - Luigi Naldini
- San Raffaele Telethon Institute for Gene Therapy, Division of Regenerative Medicine, Stem Cells and Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan 20132, Italy. Vita-Salute San Raffaele University, Milan 20132, Italy
| | - Andrea Annoni
- San Raffaele Telethon Institute for Gene Therapy, Division of Regenerative Medicine, Stem Cells and Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan 20132, Italy
| | - Maria Grazia Roncarolo
- San Raffaele Telethon Institute for Gene Therapy, Division of Regenerative Medicine, Stem Cells and Gene Therapy, IRCCS San Raffaele Scientific Institute, Milan 20132, Italy. Vita-Salute San Raffaele University, Milan 20132, Italy. Department of Pediatrics, Stanford School of Medicine, Stanford, CA 94305, USA.
| |
Collapse
|
115
|
Ren S, Wang J, Chen TL, Li HY, Wan YS, Peng NF, Gui XE, Zhu Y. Hepatitis B Virus Stimulated Fibronectin Facilitates Viral Maintenance and Replication through Two Distinct Mechanisms. PLoS One 2016; 11:e0152721. [PMID: 27023403 PMCID: PMC4811540 DOI: 10.1371/journal.pone.0152721] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Accepted: 03/17/2016] [Indexed: 02/07/2023] Open
Abstract
Fibronectin (FN) is a high molecular weight extracellular matrix protein that functions in cell adhesion, growth, migration, and embryonic development. However, little is known about the role of FN during viral infection. In the present study, we found significantly higher levels of FN in sera, and liver tissues from hepatitis B virus (HBV) patients relative to healthy individuals. HBV expression enhanced FN mRNA and protein levels in the hepatic cell lines Huh7 and HepG2. HBV infection of susceptible HepG2-sodium taurocholate co-transporting polypeptide cells also increased FN expression. We also found that transcriptional factor specificity protein 1 was involved in the induction of FN by HBV. Knockdown of FN expression significantly inhibited HBV DNA replication and protein synthesis through activating endogenous IFN-α production. In addition, FN interacted with the transforming growth factor β-activated protein kinase 1 (TAK1) and TAK1-binding protein complex and attenuated interferon signaling by inhibiting TAK1 phosphorylation. Furthermore, the nuclear translocation of NF-κB/p65 was found to be inhibited by FN. We also observed that FN promoted HBV enhancers to support HBV expression. These results suggest novel functions of endogenous FN involved in immune evasion and maintenance of HBV replication.
Collapse
Affiliation(s)
- Sheng Ren
- The State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Jun Wang
- Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Tie-Long Chen
- Department of Infectious Diseases, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Hao-Yu Li
- The State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Yu-Shun Wan
- The State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Nan-Fang Peng
- The State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Xi-En Gui
- Department of Infectious Diseases, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Ying Zhu
- The State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
- * E-mail:
| |
Collapse
|
116
|
Oldhafer F, Bock M, Falk CS, Vondran FWR. Immunological aspects of liver cell transplantation. World J Transplant 2016; 6:42-53. [PMID: 27011904 PMCID: PMC4801804 DOI: 10.5500/wjt.v6.i1.42] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 10/21/2015] [Accepted: 12/08/2015] [Indexed: 02/05/2023] Open
Abstract
Within the field of regenerative medicine, the liver is of major interest for adoption of regenerative strategies due to its well-known and unique regenerative capacity. Whereas therapeutic strategies such as liver resection and orthotopic liver transplantation (OLT) can be considered standards of care for the treatment of a variety of liver diseases, the concept of liver cell transplantation (LCTx) still awaits clinical breakthrough. Success of LCTx is hampered by insufficient engraftment/long-term acceptance of cellular allografts mainly due to rejection of transplanted cells. This is in contrast to the results achieved for OLT where long-term graft survival is observed on a regular basis and, hence, the liver has been deemed an immune-privileged organ. Immune responses induced by isolated hepatocytes apparently differ considerably from those observed following transplantation of solid organs and, thus, LCTx requires refined immunological strategies to improve its clinical outcome. In addition, clinical usage of LCTx but also related basic research efforts are hindered by the limited availability of high quality liver cells, strongly emphasizing the need for alternative cell sources. This review focuses on the various immunological aspects of LCTx summarizing data available not only for hepatocyte transplantation but also for transplantation of non-parenchymal liver cells and liver stem cells.
Collapse
|
117
|
Nati M, Haddad D, Birkenfeld AL, Koch CA, Chavakis T, Chatzigeorgiou A. The role of immune cells in metabolism-related liver inflammation and development of non-alcoholic steatohepatitis (NASH). Rev Endocr Metab Disord 2016; 17:29-39. [PMID: 26847547 DOI: 10.1007/s11154-016-9339-2] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The low grade inflammatory state present in obesity promotes the progression of Non-Alcoholic Fatty Liver Disease (NAFLD). In Non-Alcoholic Steatohepatitis (NASH), augmented hepatic steatosis is accompanied by aberrant intrahepatic inflammation and exacerbated hepatocellular injury. NASH is an important disorder and can lead to fibrosis, cirrhosis and even neoplasia. The pathology of NASH involves a complex network of mechanisms, including increased infiltration of different subsets of immune cells, such as monocytes, T-lymphocytes and neutrophils, to the liver, as well as activation and in situ expansion of liver resident cells such as Kupffer cells or stellate cells. In this review, we summarize recent advances regarding understanding the role of the various cells of the innate and adaptive immunity in NASH development and progression, and discuss possible future therapeutic options and tools to interfere with disease progression.
Collapse
Affiliation(s)
- Marina Nati
- Department of Clinical Pathobiochemistry, Faculty of Medicine, Technische Universität Dresden, MTZ, Fiedlerstrasse 42, 01307, Dresden, Germany
| | - David Haddad
- Department of Clinical Pathobiochemistry, Faculty of Medicine, Technische Universität Dresden, MTZ, Fiedlerstrasse 42, 01307, Dresden, Germany
| | - Andreas L Birkenfeld
- Section of Metabolic Vascular Medicine, Medical Clinic III, Faculty of Medicine, TU Dresden, Dresden, Germany
- Paul Langerhans Institute Dresden of the Helmholtz Center Munich at University Hospital and Faculty of Medicine, TU Dresden, Dresden, Germany
- German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany
- Division of Diabetes and Nutritional Sciences, Rayne Institute, King's College London, London, UK
| | - Christian A Koch
- Division of Endocrinology, Endocrine Tumor Program, Cancer Institute, University of Mississippi Medical Center, Jackson, MS, USA
| | - Triantafyllos Chavakis
- Department of Clinical Pathobiochemistry, Faculty of Medicine, Technische Universität Dresden, MTZ, Fiedlerstrasse 42, 01307, Dresden, Germany
- Paul Langerhans Institute Dresden of the Helmholtz Center Munich at University Hospital and Faculty of Medicine, TU Dresden, Dresden, Germany
- German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, TU Dresden, Dresden, Germany
| | - Antonios Chatzigeorgiou
- Department of Clinical Pathobiochemistry, Faculty of Medicine, Technische Universität Dresden, MTZ, Fiedlerstrasse 42, 01307, Dresden, Germany.
- Paul Langerhans Institute Dresden of the Helmholtz Center Munich at University Hospital and Faculty of Medicine, TU Dresden, Dresden, Germany.
- German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany.
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, TU Dresden, Dresden, Germany.
| |
Collapse
|
118
|
Wang X, Terhorst C, Herzog RW. In vivo induction of regulatory T cells for immune tolerance in hemophilia. Cell Immunol 2016; 301:18-29. [PMID: 26454643 PMCID: PMC4761281 DOI: 10.1016/j.cellimm.2015.10.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 10/01/2015] [Accepted: 10/02/2015] [Indexed: 12/22/2022]
Abstract
Current therapy for the X-linked coagulation disorder hemophilia is based on intravenous infusion of the specifically deficient coagulation factor. However, 20-30% of hemophilia A patients (factor VIII, FVIII, deficiency) generate inhibitory antibodies against FVIII. While formation of inhibitors directed against factor IX, FIX, resulting from hemophilia B treatment is comparatively rare, a serious complication that is often associated with additional immunotoxicities, e.g. anaphylaxis, occurs. Current immune tolerance protocols to eradiate inhibitors are lengthy, expensive, not effective in all patients, and there are no prophylactic tolerance regimens to prevent inhibitor formation. The outcomes of recent experiments in animal models of hemophilia demonstrate that regulatory CD4(+) T cells (Treg) are of paramount importance in controlling B cell responses to FVIII and FIX. This article reviews several novel strategies designed to in vivo induce coagulation factor-specific Treg cells and discusses the subsets of Treg that may promote immune tolerance in hemophilia. Among others, drug- and gene transfer-based protocols, lymphocyte transplant, and oral tolerance are reviewed.
Collapse
Affiliation(s)
- Xiaomei Wang
- Dept. Pediatrics, University of Florida, Gainesville, FL 32610, USA
| | - Cox Terhorst
- Div. Immunology, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
| | - Roland W Herzog
- Dept. Pediatrics, University of Florida, Gainesville, FL 32610, USA.
| |
Collapse
|
119
|
Zhang X, Feng M, Liu X, Bai L, Kong M, Chen Y, Zheng S, Liu S, Wan YJY, Duan Z, Han YP. Persistence of cirrhosis is maintained by intrahepatic regulatory T cells that inhibit fibrosis resolution by regulating the balance of tissue inhibitors of metalloproteinases and matrix metalloproteinases. Transl Res 2016; 169:67-79.e1-2. [PMID: 26613891 DOI: 10.1016/j.trsl.2015.10.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 10/07/2015] [Accepted: 10/29/2015] [Indexed: 12/26/2022]
Abstract
Fibrosis is the result of the abnormal accumulation of the extracellular matrix and ineffective clearance of fibroplasia. CD4(+)CD25(+)Foxp3(+) regulatory T cells (Tregs) are immunosuppressive lymphocytes that are highly expressed in the fibrotic tissues and peripheral blood of patients with cirrhosis or hepatocellular carcinoma. The role of Tregs in the progression of liver fibrosis is not well understood. Our experiments reveal that abundant of Tregs was scattered around sites of fibroplasia. Conversely, the depletion of Tregs promoted the resolution of liver fibrosis. As a consequence of Tregs depletion, the expression of matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs) was altered; mmp9 and timp1 were reduced, whereas mmp2 and mmp14 were enhanced. The mmp9/timp1, mmp13/timp1, and mmp14/timp2 ratios were significantly increased in association with fibrosis resolution. Kupffer cells (KCs) are the main source of MMP. We observed that when KCs were cocultured with Tregs, the Tregs were able to inhibit MMP expression of KCs even at a low ratio; and anti-transforming growth factor-β (TGF-β) significantly reversed the inhibition of Tregs on MMP. Meanwhile, we also found that after Tregs depletion, TGF-β levels decreased in the mice liver, unlike in fibrosis. Furthermore, double depletion of both KCs and Tregs did not cause fiber resolution in mice. Thus, our results demonstrate that the persistence of liver cirrhosis is maintained by increased Tregs in the sites of fibroplasia and the subsequent regulation of the MMP/TIMP balance and that the suppression of KC-mediated MMP expression contributed to the regulatory process.
Collapse
Affiliation(s)
- Xiaohui Zhang
- Artificial Liver Treatment Center, Beijing YouAn Hospital, Capital Medical University, Beijing, China
| | - Min Feng
- Department of Liver Transplantation, First Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Xin Liu
- Artificial Liver Treatment Center, Beijing YouAn Hospital, Capital Medical University, Beijing, China
| | - Li Bai
- Artificial Liver Treatment Center, Beijing YouAn Hospital, Capital Medical University, Beijing, China
| | - Ming Kong
- Artificial Liver Treatment Center, Beijing YouAn Hospital, Capital Medical University, Beijing, China
| | - Yu Chen
- Artificial Liver Treatment Center, Beijing YouAn Hospital, Capital Medical University, Beijing, China
| | - Sujun Zheng
- Artificial Liver Treatment Center, Beijing YouAn Hospital, Capital Medical University, Beijing, China
| | - Shuang Liu
- Artificial Liver Treatment Center, Beijing YouAn Hospital, Capital Medical University, Beijing, China
| | - Yu-Jui Yvonne Wan
- Department of Medical Pathology and Laboratory Medicine, University of California, Davis Health Systems, Sacramento, Calif
| | - Zhongping Duan
- Artificial Liver Treatment Center, Beijing YouAn Hospital, Capital Medical University, Beijing, China.
| | - Yuan-Ping Han
- The Center for Growth, Metabolism and Aging, The Key Laboratory for Bio-Resource and Eco-Environment, College of Life Science, and The National Key Laboratory of Biotherapy, Sichuan University, Chengdu, China.
| |
Collapse
|
120
|
Dara L, Liu ZX, Kaplowitz N. Mechanisms of adaptation and progression in idiosyncratic drug induced liver injury, clinical implications. Liver Int 2016; 36:158-65. [PMID: 26484420 PMCID: PMC4718752 DOI: 10.1111/liv.12988] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 10/13/2015] [Indexed: 12/13/2022]
Abstract
In the past decade our understanding of idiosyncratic drug induced liver injury (IDILI) and the contribution of genetic susceptibility and the adaptive immune system to the pathogenesis of this disease process has grown tremendously. One of the characteristics of IDILI is that it occurs rarely and only in a subset of individuals with a presumed susceptibility to the drug. Despite a clear association between single nucleotide polymorphisms in human leukocyte antigen (HLA) genes and certain drugs that cause IDILI, not all individuals with susceptible HLA genotypes develop clinically significant liver injury when exposed to drugs. The adaptation hypothesis has been put forth as an explanation for why only a small percentage of susceptible individuals develop overt IDILI and severe injury, while the majority with susceptible genotypes develop only mild abnormalities that resolve spontaneously upon continuation of the drug. This spontaneous resolution is referred to as clinical adaptation. Failure to adapt or defective adaptation leads to clinically significant liver injury. In this review we explore the immuno-tolerant microenvironment of the liver and the mechanisms of clinical adaptation in IDILI with a focus on the role of immune-tolerance and cellular adaptive responses.
Collapse
Affiliation(s)
- Lily Dara
- Research Center for Liver Disease, Keck School of Medicine, University of Southern California, Los Angeles CA
| | - Zhang-Xu Liu
- Research Center for Liver Disease, Keck School of Medicine, University of Southern California, Los Angeles CA
| | - Neil Kaplowitz
- Research Center for Liver Disease, Keck School of Medicine, University of Southern California, Los Angeles CA
| |
Collapse
|
121
|
Doerfler PA, Nayak S, Corti M, Morel L, Herzog RW, Byrne BJ. Targeted approaches to induce immune tolerance for Pompe disease therapy. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2016; 3:15053. [PMID: 26858964 PMCID: PMC4729315 DOI: 10.1038/mtm.2015.53] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 11/04/2015] [Accepted: 11/28/2015] [Indexed: 12/31/2022]
Abstract
Enzyme and gene replacement strategies have developed into viable therapeutic approaches for the treatment of Pompe disease (acid α-glucosidase (GAA) deficiency). Unfortunately, the introduction of GAA and viral vectors encoding the enzyme can lead to detrimental immune responses that attenuate treatment benefits and can impact patient safety. Preclinical and clinical experience in addressing humoral responses toward enzyme and gene therapy for Pompe disease have provided greater understanding of the immunological consequences of the provided therapy. B- and T-cell modulation has been shown to be effective in preventing infusion-associated reactions during enzyme replacement therapy in patients and has shown similar success in the context of gene therapy. Additional techniques to induce humoral tolerance for Pompe disease have been the targeted expression or delivery of GAA to discrete cell types or tissues such as the gut-associated lymphoid tissues, red blood cells, hematopoietic stem cells, and the liver. Research into overcoming preexisting immunity through immunomodulation and gene transfer are becoming increasingly important to achieve long-term efficacy. This review highlights the advances in therapies as well as the improved understanding of the molecular mechanisms involved in the humoral immune response with emphasis on methods employed to overcome responses associated with enzyme and gene therapies for Pompe disease.
Collapse
Affiliation(s)
- Phillip A Doerfler
- Department of Pediatrics, University of Florida , Gainesville, Florida, USA
| | - Sushrusha Nayak
- Department of Medicine, Karolinska Institute , Stockholm, Sweden
| | - Manuela Corti
- Department of Pediatrics, University of Florida , Gainesville, Florida, USA
| | - Laurence Morel
- Department of Pathology, Immunology, and Laboratory Medicine, University of Florida , Gainesville, Florida, USA
| | - Roland W Herzog
- Department of Pediatrics, University of Florida , Gainesville, Florida, USA
| | - Barry J Byrne
- Department of Pediatrics, University of Florida , Gainesville, Florida, USA
| |
Collapse
|
122
|
Merlin S, Bhargava KK, Ranaldo G, Zanolini D, Palestro CJ, Santambrogio L, Prat M, Follenzi A, Gupta S. Kupffer Cell Transplantation in Mice for Elucidating Monocyte/Macrophage Biology and for Potential in Cell or Gene Therapy. THE AMERICAN JOURNAL OF PATHOLOGY 2016; 186:539-51. [PMID: 26773351 DOI: 10.1016/j.ajpath.2015.11.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 10/16/2015] [Accepted: 11/09/2015] [Indexed: 02/06/2023]
Abstract
Kupffer cells (KC) play major roles in immunity and tissue injury or repair. Because recapitulation of KC biology and function within liver will allow superior insights into their functional repertoire, we studied the efficacy of the cell transplantation approach for this purpose. Mouse KC were isolated from donor livers, characterized, and transplanted into syngeneic recipients. To promote cell engraftment through impairments in native KC, recipients were preconditioned with gadolinium chloride. The targeting, fate, and functionality of transplanted cells were evaluated. The findings indicated that transplanted KC engrafted and survived in recipient livers throughout the study period of 3 months. Transplanted KC expressed macrophage functions, including phagocytosis and cytokine expression, with or without genetic modifications using lentiviral vectors. This permitted studies of whether transplanted KC could affect outcomes in the context of acetaminophen hepatotoxicity or hepatic ischemia-reperfusion injury. Transplanted KC exerted beneficial effects in these injury settings. The benefits resulted from cytoprotective factors including vascular endothelial growth factor. In conclusion, transplanted adult KC were successfully targeted and engrafted in the liver with retention of innate immune and tissue repair functions over the long term. This will provide excellent opportunities to address critical aspects in the biogenesis, fate, and function of KC within their native liver microenvironment and to develop the cell and gene therapy potential of KC transplantation.
Collapse
Affiliation(s)
- Simone Merlin
- Department of Health Sciences, Università del Piemonte Orientale "A. Avogadro", Novara, Italy
| | - Kuldeep K Bhargava
- Division of Nuclear Medicine and Molecular Imaging, North Shore - Long Island Jewish Health System, New Hyde Park, New York
| | - Gabriella Ranaldo
- Department of Health Sciences, Università del Piemonte Orientale "A. Avogadro", Novara, Italy
| | - Diego Zanolini
- Department of Health Sciences, Università del Piemonte Orientale "A. Avogadro", Novara, Italy
| | - Christopher J Palestro
- Division of Nuclear Medicine and Molecular Imaging, North Shore - Long Island Jewish Health System, New Hyde Park, New York
| | - Laura Santambrogio
- Department of Pathology, Albert Einstein College of Medicine, Bronx, New York
| | - Maria Prat
- Department of Health Sciences, Università del Piemonte Orientale "A. Avogadro", Novara, Italy
| | - Antonia Follenzi
- Department of Health Sciences, Università del Piemonte Orientale "A. Avogadro", Novara, Italy; Department of Pathology, Albert Einstein College of Medicine, Bronx, New York.
| | - Sanjeev Gupta
- Department of Pathology, Albert Einstein College of Medicine, Bronx, New York; Department of Medicine, Marion Bessin Liver Research Center, Cancer Research Center, Diabetes Center, Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, and Institute for Clinical and Translational Research, Albert Einstein College of Medicine, Bronx, New York.
| |
Collapse
|
123
|
Fan C, Zhang Y, Zhou Y, Li B, He Y, Guo Y, Jia Z. Up-regulation of A20/ABIN1 contributes to inefficient M1 macrophage polarization during Hepatitis C virus infection. Virol J 2015; 12:147. [PMID: 26382585 PMCID: PMC4574525 DOI: 10.1186/s12985-015-0379-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 09/01/2015] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Anti-hepatitis C virus (HCV) responses are often accompanied by an increase in alanine aminotransferase levels in HCV-infected patients, indicating that inflammatory responses are compromised by the virus. Additionally, inflammation is associated with M1-polarizated macrophages, which secrete cytokines such as tumor necrosis factor-α, interleukin-1, and interleukin-12, and present antigens through phagocytosis. HCV-encoded proteins are presented as specific viral antigens in particular infectious steps that influence the immune response. For instance, HCV antigens impact macrophage PD-1 and Tim-3 expression, and contribute to impaired viral clearance. Furthermore, circulatory HCV antigens from infected patients inhibit dendritic cell differentiation, which raises the possibility that HCV antigens may also interfere with macrophage polarization. METHODS In this study, the impact of HCV antigen stimulation on M1-polarized macrophages was investigated. The influence of HCV antigens was evaluated by reverse transcription polymerase chain reaction and enzyme-linked immunosorbent assay. Specific changes were investigated clinically by flow cytometry and immunofluorescence. Effects of NF-κB during the process were analyzed by western blot. RESULTS HCV infection dampened M1 macrophage polarization ex vivo and in vitro. After antigen stimulation, NF-κB signaling was suppressed by the up-regulation of A20 and A20-binding inhibitor of NF-κB binding protein, which likely leads to a variation of functional molecules such as tumor necrosis factor-α, CD163, matrix metalloproteinases, transferrin receptor-1, and CD100, reflecting an anti-inflammatory reaction against M1-polarization. CONCLUSION HCV antigens stimulation up-regulates A20/A20-binding inhibitor of NF-κB binding protein expression, which consequently contributes to inefficient M1 macrophage polarization.
Collapse
Affiliation(s)
- Chao Fan
- Department of Infectious Diseases and Center of liver Diseases, Tangdu Hospital, the Fourth Military Medical University, Xi'an, 710038, China.
| | - Ying Zhang
- Department of Infectious Diseases and Center of liver Diseases, Tangdu Hospital, the Fourth Military Medical University, Xi'an, 710038, China.
| | - Yun Zhou
- Department of Infectious Diseases and Center of liver Diseases, Tangdu Hospital, the Fourth Military Medical University, Xi'an, 710038, China.
| | - Bingjie Li
- Department of Infectious Diseases and Center of liver Diseases, Tangdu Hospital, the Fourth Military Medical University, Xi'an, 710038, China.
| | - Yu He
- Department of Infectious Diseases and Center of liver Diseases, Tangdu Hospital, the Fourth Military Medical University, Xi'an, 710038, China.
| | - Yonghong Guo
- Department of Infectious Diseases and Center of liver Diseases, Tangdu Hospital, the Fourth Military Medical University, Xi'an, 710038, China.
| | - Zhansheng Jia
- Department of Infectious Diseases and Center of liver Diseases, Tangdu Hospital, the Fourth Military Medical University, Xi'an, 710038, China.
| |
Collapse
|
124
|
Doherty DG. Immunity, tolerance and autoimmunity in the liver: A comprehensive review. J Autoimmun 2015; 66:60-75. [PMID: 26358406 DOI: 10.1016/j.jaut.2015.08.020] [Citation(s) in RCA: 207] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 08/26/2015] [Indexed: 12/14/2022]
Abstract
The hepatic immune system is constantly exposed to a massive load of harmless dietary and commensal antigens, to which it must remain tolerant. Immune tolerance in the liver is mediated by a number of specialized antigen-presenting cells, including dendritic cells, Kupffer cells, liver sinusoidal endothelial cells and hepatic stellate cells. These cells are capable of presenting antigens to T cells leading to T cell apoptosis, anergy, or differentiation into regulatory T cells. However, the hepatic immune system must also be able to respond to pathogens and tumours and therefore must be equipped with mechanisms to override immune tolerance. The liver is a site of accumulation of a number of innate lymphocyte populations, including natural killer cells, CD56(+) T cells, natural killer T cells, γδ T cells, and mucosal-associated invariant T cells. Innate lymphocytes recognize conserved metabolites derived from microorganisms and host cells and respond by killing target cells or promoting the differentiation and/or activation of other cells of the immune system. Innate lymphocytes can promote the maturation of antigen-presenting cells from their precursors and thereby contribute to the generation of immunogenic T cell responses. These cells may be responsible for overriding hepatic immune tolerance to autoantigens, resulting in the induction and maintenance of autoreactive T cells that mediate liver injury causing autoimmune liver disease. Some innate lymphocyte populations can also directly mediate liver injury by killing hepatocytes or bile duct cells in murine models of hepatitis, whilst other populations may protect against liver disease. It is likely that innate lymphocyte populations can promote or protect against autoimmune liver disease in humans and that these cells can be targeted therapeutically. Here I review the cellular mechanisms by which hepatic antigen-presenting cells and innate lymphocytes control the balance between immunity, tolerance and autoimmunity in the liver.
Collapse
Affiliation(s)
- Derek G Doherty
- Division of Immunology, School of Medicine, Trinity College Dublin, Ireland.
| |
Collapse
|
125
|
Treg Cell Differentiation: From Thymus to Peripheral Tissue. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2015; 136:175-205. [PMID: 26615097 DOI: 10.1016/bs.pmbts.2015.07.014] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Regulatory T cells (Tregs) are crucial mediators of self-tolerance in the periphery. They differentiate in the thymus, where interactions with thymus-resident antigen-presenting cells, an instructive cytokine milieu, and stimulation of the T cell receptor lead to the selection into the Treg lineage and the induction of Foxp3 gene expression. Once mature, Treg cells leave the thymus and migrate into either the secondary lymphoid tissues, e.g., lymph nodes and spleen, or peripheral nonlymphoid tissues. There is growing evidence that Treg cells go beyond the classical modulation of immune responses and also play important functional roles in nonlymphoid peripheral tissues. In this review, we summarize recent findings about the thymic Treg lineage differentiation as well as the further specialization of Treg cells in the secondary lymphoid and in the peripheral nonlymphoid organs.
Collapse
|
126
|
Nguyen-Lefebvre AT, Horuzsko A. Kupffer Cell Metabolism and Function. JOURNAL OF ENZYMOLOGY AND METABOLISM 2015; 1:101. [PMID: 26937490 PMCID: PMC4771376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Kupffer cells are resident liver macrophages and play a critical role in maintaining liver functions. Under physiological conditions, they are the first innate immune cells and protect the liver from bacterial infections. Under pathological conditions, they are activated by different components and can differentiate into M1-like (classical) or M2-like (alternative) macrophages. The metabolism of classical or alternative activated Kupffer cells will determine their functions in liver damage. Special functions and metabolism of Kupffer cells suggest that they are an attractive target for therapy of liver inflammation and related diseases, including cancer and infectious diseases. Here we review the different types of Kupffer cells and their metabolism and functions in physiological and pathological conditions.
Collapse
Affiliation(s)
- Anh Thu Nguyen-Lefebvre
- Cancer Center, Molecular Oncology Program, Georgia Regents University, Augusta, GA, 30912, USA
| | - Anatolij Horuzsko
- Cancer Center, Molecular Oncology Program, Georgia Regents University, Augusta, GA, 30912, USA
- Cancer Center, Molecular Oncology Program, Department of Medicine, Georgia Regents University, 1410 Laney Walker Blvd., Augusta, GA, 30912, USA
| |
Collapse
|
127
|
Heymann F, Peusquens J, Ludwig-Portugall I, Kohlhepp M, Ergen C, Niemietz P, Martin C, van Rooijen N, Ochando JC, Randolph GJ, Luedde T, Ginhoux F, Kurts C, Trautwein C, Tacke F. Liver inflammation abrogates immunological tolerance induced by Kupffer cells. Hepatology 2015; 62:279-91. [PMID: 25810240 DOI: 10.1002/hep.27793] [Citation(s) in RCA: 251] [Impact Index Per Article: 27.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 03/17/2015] [Indexed: 12/12/2022]
Abstract
UNLABELLED The liver is essential for inducing immunological tolerance toward harmless antigens to maintain immune system homeostasis. However, the precise cellular mechanisms of tolerance induction against particle-bound antigens, the role of the local hepatic microenvironment, and implications for therapeutic targets in immune-mediated diseases are currently unclear. In order to elucidate cellular mechanisms of tolerance induction in healthy and injured liver, we developed a novel in vivo system combining the systemic delivery of low-dose peptide antigens coupled to inert particles, immunological readouts, and sophisticated intravital multiphoton microscopy-based imaging of liver in mice. We show that liver resident macrophages, Kupffer cells (KCs), but not hepatic monocyte-derived macrophages or dendritic cells (DCs), are the central cellular scavenger for circulating particle-associated antigens in homeostasis. KC-associated antigen presentation induces CD4 T-cell arrest, expansion of naturally occurring Foxp3(+) CD25(+) interleukin-10-producing antigen-specific regulatory T cells (Tregs) and tolerogenic immunity. Particle-associated tolerance induction in the liver protected mice from kidney inflammation in T-cell-mediated glomerulonephritis, indicating therapeutic potential of targeting KC for immune-mediated extrahepatic disorders. Liver inflammation in two independent experimental models of chronic liver injury and fibrosis abrogated tolerance induction and led to an immunogenic reprogramming of antigen-specific CD4 T cells. In injured liver, infiltrating monocyte-derived macrophages largely augment the hepatic phagocyte compartment, resulting in antigen redistribution between myeloid cell populations and, simultaneously, KCs lose signature markers of their tolerogenic phenotype. CONCLUSIONS Hepatic induction of tissue-protective immunological tolerance against particulate antigens is dependent on KCs as well as on a noninflamed liver microenvironment, thereby providing mechanistic explanations for the clinical observation of immune dysfunction and tolerance break in patients with advanced liver diseases.
Collapse
Affiliation(s)
- Felix Heymann
- Department of Medicine III, RWTH University-Hospital Aachen, Aachen, Germany
| | - Julia Peusquens
- Department of Medicine III, RWTH University-Hospital Aachen, Aachen, Germany
| | - Isis Ludwig-Portugall
- Institute for Molecular Medicine and Experimental Immunology, Rheinische Friedrich-Wilhelms-Universität, Bonn, Germany
| | - Marlene Kohlhepp
- Department of Medicine III, RWTH University-Hospital Aachen, Aachen, Germany
| | - Can Ergen
- Department of Medicine III, RWTH University-Hospital Aachen, Aachen, Germany
| | - Patricia Niemietz
- Department of Medicine III, RWTH University-Hospital Aachen, Aachen, Germany
| | - Christian Martin
- Department of Pharmacology, RWTH University-Hospital Aachen, Aachen, Germany
| | - Nico van Rooijen
- Department of Molecular Cell Biology, Vrije Universiteit, Amsterdam, The Netherlands
| | - Jordi C Ochando
- Department of Nephrology, Mount Sinai School of Medicine, New York, NY
| | | | - Tom Luedde
- Department of Medicine III, RWTH University-Hospital Aachen, Aachen, Germany
| | - Florent Ginhoux
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore
| | - Christian Kurts
- Institute for Molecular Medicine and Experimental Immunology, Rheinische Friedrich-Wilhelms-Universität, Bonn, Germany
| | - Christian Trautwein
- Department of Medicine III, RWTH University-Hospital Aachen, Aachen, Germany
| | - Frank Tacke
- Department of Medicine III, RWTH University-Hospital Aachen, Aachen, Germany
| |
Collapse
|
128
|
Cremel M, Guerin N, Campello G, Barthe Q, Berlier W, Horand F, Godfrin Y. Innovative approach in Pompe disease therapy: Induction of immune tolerance by antigen-encapsulated red blood cells. Int J Pharm 2015; 491:69-77. [PMID: 26056928 DOI: 10.1016/j.ijpharm.2015.05.062] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 05/22/2015] [Accepted: 05/24/2015] [Indexed: 12/23/2022]
Abstract
Pompe disease is a glycogen storage disease caused by acid α-glucosidase enzyme deficiency. Currently, the unique treatment is lifelong enzyme replacement therapy ERT with frequent intravenous administration of the recombinant analog alglucosidase-α (AGA), which ultimately generates a sustained humoral response resulting in treatment discontinuation. Our aim is to use the tolerogenic properties of antigen-encapsulated red blood cells (RBCs) to abolish the humoral response against AGA and to restore tolerance to replacement therapy. To demonstrate that our approach could prevent the AGA-induced immune response, mice were intravenously injected three times with AGA encapsulated into RBCs before being sensitized to AGA with several adjuvant molecules. Control animals received injections of free AGA instead of the encapsulated molecule. One-week after treatment with AGA-loaded RBCs, a strong decrease in specific humoral response was observed despite three stimulations with AGA and adjuvant molecules. Furthermore, this specific immunomodulation was maintained for at least two months without affecting the overall immune response. AGA-loaded RBCs represent a promising strategy to induce or restore tolerance in Pompe disease patients who develop hypersensitivity reactions following repeated AGA administrations.
Collapse
|
129
|
Endo K, Hori T, Jobara K, Hata T, Tsuruyama T, Uemoto S. Pretransplant replacement of donor liver grafts with recipient Kupffer cells attenuates liver graft rejection in rats. J Gastroenterol Hepatol 2015; 30:944-51. [PMID: 25532540 DOI: 10.1111/jgh.12872] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/16/2014] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND AIM Rejection of liver grafts is a difficult issue that has not been resolved. Preoperative replacement of liver cells in the graft with cells from the intended recipient may attenuate rejection. We investigated whether preoperative transplant of recipient bone marrow cells (BMCs) to the donor replaced liver allograft cells and attenuated rejection. METHODS We used a rat model of allogeneic liver transplant (LT) from Dark Agouti (DA) to Lewis (LEW) rats. In BMC group, DA rats received BMC transplants from LacZ-transgenic LEW rats at 1 week before LT. In the control group, DA rats received no preoperative treatment. We evaluated graft damage at 7 days after LT and the survival of the recipient rats. RESULTS Rats in the BMC group experienced prolonged survival that was abrogated by the administration of gadolinium chloride to donors at 24 h before LT. Serum concentrations of total bilirubin and hyaluronic acid on day 7 were significantly lower in the BMC group, and histopathological analyses revealed that rejection of the liver graft was attenuated. X-gal staining and immunohistostaining of the liver graft revealed that BMCs engrafted in the sinusoidal space differentiated into Kupffer cells. CONCLUSIONS Preoperative transplant of recipient BMCs to LT donors replaced donor Kupffer cells and attenuated post-LT rejection, indicating that this strategy may increase the success of LT.
Collapse
Affiliation(s)
- Kosuke Endo
- Division of Hepato-Biliary-Pancreatic and Transplant Surgery, Department of Surgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | | | | | | | | | | |
Collapse
|
130
|
Eckert C, Klein N, Kornek M, Lukacs-Kornek V. The complex myeloid network of the liver with diverse functional capacity at steady state and in inflammation. Front Immunol 2015; 6:179. [PMID: 25941527 PMCID: PMC4403526 DOI: 10.3389/fimmu.2015.00179] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 03/30/2015] [Indexed: 12/23/2022] Open
Abstract
In recent years, it has been an explosion of information regarding the role of various myeloid cells in liver pathology. Macrophages and dendritic cell (DC) play crucial roles in multiple chronic liver diseases such as fibrosis and non-alcoholic fatty liver disease (NAFLD). The complexity of myeloid cell populations and the missing exclusive marker combination make the interpretation of the data often extremely difficult. The current review aims to summarize the multiple roles of macrophages and DCs in chronic liver diseases, especially pointing out how these cells influence liver immune and parenchymal cells thereby altering liver function and pathology. Moreover, the review outlines the currently known marker combinations for the identification of these cell populations for the study of their role in liver immunology.
Collapse
Affiliation(s)
- Christoph Eckert
- Department of Medicine II, Saarland University Medical Center , Homburg , Germany
| | - Niklas Klein
- Department of Medicine II, Saarland University Medical Center , Homburg , Germany
| | - Miroslaw Kornek
- Department of Medicine II, Saarland University Medical Center , Homburg , Germany
| | | |
Collapse
|
131
|
Hashempour T, Bamdad T, Bergamini A, Lavergne JP, Haj-Sheykholeslami A, Brakier-Gingras L, Ajorloo M, Merat S. F protein increases CD4+CD25+ T cell population in patients with chronic hepatitis C. Pathog Dis 2015; 73:ftv022. [PMID: 25862675 DOI: 10.1093/femspd/ftv022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/17/2015] [Indexed: 01/28/2023] Open
Abstract
HCV is a global health problem with an estimated 230 million chronically infected people worldwide. It has been reported that a 17-kd protein translated from core-encoding genomic region can contribute to immune-mediated mechanisms associated with the development of the chronic disease. Also, Treg cells can be contributed to an inadequate response against the viruses, leading to chronic infection. Here we evaluated the ability of protein F to modulate the frequency of CD4+CD25+FoxP3+T and IL-10+T cells in patients with chronic HCV infection. F gene was amplified and cloned in the expression vector. The protein was purified and used for stimulation of PBMCs in the HCV chronic patients and the control groups. The frequency of CD4+CD25+FoxP3+ T cell-like populations and IL-10-producing CD4+CD25+ T cells was assessed in the HCV-infected patients and in the healthy controls by flow cytometry, which showed an increase of both CD4+CD25+FoxP3+ T cell-like population and IL-10-producing CD4+CD25+ T cells in the HCV-infected patients positive for anti-F antibody. Our results suggest the potential involvement of F and core antigens in increasing the frequency of CD4+CD25+FoxP3+ T cell-like population and IL-10-producing CD4+CD25+ T cells which may be associated with HCV-persistent infection.
Collapse
Affiliation(s)
- Tayebeh Hashempour
- Department of Virology, Faculty of Medical Sciences, Tarbiat Modares University, 14115-331 Tehran, Iran Digestive Disease Research Center, Shariati Hospital, Tehran University of Medical Sciences, 14117 Tehran, Iran
| | - Taravat Bamdad
- Department of Virology, Faculty of Medical Sciences, Tarbiat Modares University, 14115-331 Tehran, Iran
| | - Alberto Bergamini
- Department of Internal Medicine, University of Rome Tor Vergata, Via Montpellier 1,00133 Rome, Italy
| | - Jean Pierre Lavergne
- Laboratoire de Bioinformatique et RMN structurales, Institut de Biologie et chimie des protéines, UMR 5086 CNRS, Université Claude Bernard Lyon I
| | - Arghavan Haj-Sheykholeslami
- Digestive Disease Research Center, Shariati Hospital, Tehran University of Medical Sciences, 14117 Tehran, Iran
| | - Léa Brakier-Gingras
- Département de Biochimie et Médecine Moléculaire, Faculté de Médecine, Université de Montréal, Pavillon Roger-Gaudry, bureau E-519, C.P. 6128, Succ. Centre-ville, Montréal, Québec
| | - Mehdi Ajorloo
- Digestive Disease Research Center, Shariati Hospital, Tehran University of Medical Sciences, 14117 Tehran, Iran
| | - Shahin Merat
- Digestive Disease Research Center, Shariati Hospital, Tehran University of Medical Sciences, 14117 Tehran, Iran
| |
Collapse
|
132
|
Mak A, Uetrecht J. Immunization with amodiaquine-modified hepatic proteins prevents amodiaquine-induced liver injury. J Immunotoxicol 2014; 12:361-7. [DOI: 10.3109/1547691x.2014.983660] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
|
133
|
Greig JA, Peng H, Ohlstein J, Medina-Jaszek CA, Ahonkhai O, Mentzinger A, Grant RL, Roy S, Chen SJ, Bell P, Tretiakova AP, Wilson JM. Intramuscular injection of AAV8 in mice and macaques is associated with substantial hepatic targeting and transgene expression. PLoS One 2014; 9:e112268. [PMID: 25393537 PMCID: PMC4230988 DOI: 10.1371/journal.pone.0112268] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Accepted: 10/06/2014] [Indexed: 12/20/2022] Open
Abstract
Intramuscular (IM) administration of adeno-associated viral (AAV) vectors has entered the early stages of clinical development with some success, including the first approved gene therapy product in the West called Glybera. In preparation for broader clinical development of IM AAV vector gene therapy, we conducted detailed pre-clinical studies in mice and macaques evaluating aspects of delivery that could affect performance. We found that following IM administration of AAV8 vectors in mice, a portion of the vector reached the liver and hepatic gene expression contributed significantly to total expression of secreted transgenes. The contribution from liver could be controlled by altering injection volume and by the use of traditional (promoter) and non-traditional (tissue-specific microRNA target sites) expression control elements. Hepatic distribution of vector following IM injection was also noted in rhesus macaques. These pre-clinical data on AAV delivery should inform safe and efficient development of future AAV products.
Collapse
Affiliation(s)
- Jenny A. Greig
- Gene Therapy Program, Department of Pathology and Laboratory Medicine, Division of Transfusion Medicine, University of Pennsylvania, TRL Suite 2000, 125 South 31 Street, Philadelphia, PA, 19104, United States of America
| | - Hui Peng
- Gene Therapy Program, Department of Pathology and Laboratory Medicine, Division of Transfusion Medicine, University of Pennsylvania, TRL Suite 2000, 125 South 31 Street, Philadelphia, PA, 19104, United States of America
| | - Jason Ohlstein
- Gene Therapy Program, Department of Pathology and Laboratory Medicine, Division of Transfusion Medicine, University of Pennsylvania, TRL Suite 2000, 125 South 31 Street, Philadelphia, PA, 19104, United States of America
| | - C. Angelica Medina-Jaszek
- Gene Therapy Program, Department of Pathology and Laboratory Medicine, Division of Transfusion Medicine, University of Pennsylvania, TRL Suite 2000, 125 South 31 Street, Philadelphia, PA, 19104, United States of America
| | - Omua Ahonkhai
- Gene Therapy Program, Department of Pathology and Laboratory Medicine, Division of Transfusion Medicine, University of Pennsylvania, TRL Suite 2000, 125 South 31 Street, Philadelphia, PA, 19104, United States of America
| | - Anne Mentzinger
- Gene Therapy Program, Department of Pathology and Laboratory Medicine, Division of Transfusion Medicine, University of Pennsylvania, TRL Suite 2000, 125 South 31 Street, Philadelphia, PA, 19104, United States of America
| | - Rebecca L. Grant
- Gene Therapy Program, Department of Pathology and Laboratory Medicine, Division of Transfusion Medicine, University of Pennsylvania, TRL Suite 2000, 125 South 31 Street, Philadelphia, PA, 19104, United States of America
| | - Soumitra Roy
- Gene Therapy Program, Department of Pathology and Laboratory Medicine, Division of Transfusion Medicine, University of Pennsylvania, TRL Suite 2000, 125 South 31 Street, Philadelphia, PA, 19104, United States of America
| | - Shu-Jen Chen
- Gene Therapy Program, Department of Pathology and Laboratory Medicine, Division of Transfusion Medicine, University of Pennsylvania, TRL Suite 2000, 125 South 31 Street, Philadelphia, PA, 19104, United States of America
| | - Peter Bell
- Gene Therapy Program, Department of Pathology and Laboratory Medicine, Division of Transfusion Medicine, University of Pennsylvania, TRL Suite 2000, 125 South 31 Street, Philadelphia, PA, 19104, United States of America
| | - Anna P. Tretiakova
- Gene Therapy Program, Department of Pathology and Laboratory Medicine, Division of Transfusion Medicine, University of Pennsylvania, TRL Suite 2000, 125 South 31 Street, Philadelphia, PA, 19104, United States of America
| | - James M. Wilson
- Gene Therapy Program, Department of Pathology and Laboratory Medicine, Division of Transfusion Medicine, University of Pennsylvania, TRL Suite 2000, 125 South 31 Street, Philadelphia, PA, 19104, United States of America
| |
Collapse
|
134
|
Boltjes A, Movita D, Boonstra A, Woltman AM. The role of Kupffer cells in hepatitis B and hepatitis C virus infections. J Hepatol 2014; 61:660-71. [PMID: 24798624 DOI: 10.1016/j.jhep.2014.04.026] [Citation(s) in RCA: 116] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2013] [Revised: 04/04/2014] [Accepted: 04/25/2014] [Indexed: 12/12/2022]
Abstract
Globally, over 500 million people are chronically infected with the hepatitis B virus (HBV) or hepatitis C virus (HCV). These chronic infections cause liver inflammation, and may result in fibrosis/cirrhosis or hepatocellular carcinoma. Albeit that HBV and HCV differ in various aspects, clearance, persistence, and immunopathology of either infection depends on the interplay between the innate and adaptive responses in the liver. Kupffer cells, the liver-resident macrophages, are abundantly present in the sinusoids of the liver. These cells have been shown to be crucial players to maintain homeostasis, but also contribute to pathology. However, it is important to note that especially during pathology, Kupffer cells are difficult to distinguish from infiltrating monocytes/macrophages and other myeloid cells. In this review we discuss our current understanding of Kupffer cells, and assess their role in the regulation of anti-viral immunity and disease pathogenesis during HBV and HCV infection.
Collapse
Affiliation(s)
- Arjan Boltjes
- Dept. of Gastroenterology and Hepatology, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Dowty Movita
- Dept. of Gastroenterology and Hepatology, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - André Boonstra
- Dept. of Gastroenterology and Hepatology, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Andrea M Woltman
- Dept. of Gastroenterology and Hepatology, Erasmus MC University Medical Center, Rotterdam, The Netherlands.
| |
Collapse
|
135
|
|
136
|
Zhang XH, Lou JL, Bai L, Zheng SJ, Chen Y, Duan ZP. Regulatory T cells promote liver fibrosis in mice. Shijie Huaren Xiaohua Zazhi 2014; 22:3264-3269. [DOI: 10.11569/wcjd.v22.i22.3264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the role of regulatory T cells (Tregs) in the development of liver fibrosis in mice.
METHODS: Experimental mice were divided into three groups: a liver fibrosis group, a liver fibrosis + anti-CD25 group and a control group. Liver fibrosis was induced by intraperitoneal injection of 30% carbon tetrachloride (CCl4). Four weeks later, mice in the liver fibrosis + anti-CD25 group were intraperitoneally injected with the purified CD25 monoclonal antibody (PC61 culture supernatant) to deplete Tregs. The mice injected with the same volume of saline were used as controls. Flow cytometry was used to detect the level of liver CD4+CD25+ T cells, immunofluorescence was used to stain the activated hepatic stellate cells (α-SMA), and real-time PCR was used to detect the expression of Foxp3 and type-Ⅰ and -Ⅲ collagen in the liver.
RESULTS: Flow cytometry analysis showed that the number of Tregs was significantly higher in liver fibrosis mice; after injection of CD25 antibody, CD4+CD25+ T cells in the liver were decreased by 50%. Real-time PCR showed that Foxp3 mRNA expression was significantly decreased compared to the fibrosis group. Immunofluorescence results showed that α-SMA was significantly reduced after Tregs depletion, compared to liver fibrosis mice. The mRNA levels of type-Ⅰand type-Ⅲ collagen were also decreased after Tregs depletion.
CONCLUSION: Tregs can promote liver fibrosis in mice.
Collapse
|
137
|
Appropriate development of the liver Treg compartment is modulated by the microbiota and requires TGF-β and MyD88. J Immunol Res 2014; 2014:279736. [PMID: 25177709 PMCID: PMC4142300 DOI: 10.1155/2014/279736] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2014] [Accepted: 06/30/2014] [Indexed: 01/22/2023] Open
Abstract
Neither the early postnatal development of the liver Treg compartment nor the factors that regulate its development has been characterized. We compared the early developmental patterns of Treg cell accumulation in murine liver, thymus, and spleen. A FoxP3EGFP reporter mouse was employed to identify Treg cells. Mononuclear cells were isolated from organs postnatally, stained for CD4, and examined by flow cytometry to enumerate FoxP3+CD4hi cells. To assess roles for TGF-β1, MyD88, and TLR2, gene-specific knockout pups were generated from heterozygous breeders. To test the role of commensal bacteria, pregnant dams were administered antibiotics during gestation and after parturition. The pattern of appearance of Treg cells differed in liver, spleen, and thymus. Notably, at 1-2 weeks, the frequency of CD4hi FoxP3+ T cells in liver exceeded that in spleen by 1.5- to 2-fold. The relative increase in liver Treg frequency was transient and was dependent upon TGF-β1 and MyD88, but not TLR2, and was abrogated by antibiotic treatment. A relative increase in liver Treg frequency occurs approximately 1-2 weeks after parturition that appears to be driven by colonization of the intestine with commensal bacteria and is mediated by a pathway that requires TGF-β1 and MyD88, but not TLR2.
Collapse
|
138
|
Tay SS, Wong YC, Roediger B, Sierro F, Lu B, McDonald DM, McGuffog CM, Meyer NJ, Alexander IE, Parish IA, Heath WR, Weninger W, Bishop GA, Gamble JR, McCaughan GW, Bertolino P, Bowen DG. Intrahepatic Activation of Naive CD4+ T Cells by Liver-Resident Phagocytic Cells. THE JOURNAL OF IMMUNOLOGY 2014; 193:2087-95. [DOI: 10.4049/jimmunol.1400037] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
|
139
|
Somanathan S, Jacobs F, Wang Q, Hanlon AL, Wilson JM, Rader DJ. AAV vectors expressing LDLR gain-of-function variants demonstrate increased efficacy in mouse models of familial hypercholesterolemia. Circ Res 2014; 115:591-9. [PMID: 25023731 DOI: 10.1161/circresaha.115.304008] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
RATIONALE Familial hypercholesterolemia is a genetic disorder that arises because of loss-of-function mutations in the low-density lipoprotein receptor (LDLR) and homozygous familial hypercholesterolemia is a candidate for gene therapy using adeno-associated viral vectors. Proprotein convertase subtilisin/kexin type 9 (PCSK9) and inducible degrader of LDLR (IDOL) negatively regulate LDLR protein and could dampen adeno-associated viral vector encoded LDLR expression. OBJECTIVE We sought to create vectors expressing gain-of-function human LDLR variants that are resistant to degradation by human PCSK9 (hPCSK9) and IDOL and thereby enhance hepatic LDLR protein abundance and plasma LDL cholesterol reduction. METHODS AND RESULTS Amino acid substitutions were introduced into the coding sequence of human LDLR cDNA to reduce interaction with hPCSK9 and human IDOL. A panel of mutant human LDLRs was initially screened in vitro for escape from PCSK9. The variant human LDLR-L318D was further evaluated using a mouse model of homozygous familial hypercholesterolemia lacking endogenous LDLR and apolipoprotein B mRNA editing enzyme catalytic, APOBEC-1 (double knockout). Administration of wild-type human LDLR to double knockout mice, expressing hPCSK9, led to diminished LDLR activity. However, LDLR-L318D was resistant to hPCSK9-mediated degradation and effectively reduced cholesterol levels. Similarly, the LDLR-K809R\C818A construct avoided human IDOL regulation and achieved stable reductions in serum cholesterol. An adeno-associated viral vector serotype 8.LDLR-L318D\K809R\C818A vector that carried all 3 amino acid substitutions conferred partial resistance to both hPCSK9- and human IDOL-mediated degradation. CONCLUSIONS Amino acid substitutions in the human LDLR confer partial resistance to PCSK9 and IDOL regulatory pathways with improved reduction in cholesterol levels and improve on a potential gene therapeutic approach to treat homozygous familial hypercholesterolemia subjects.
Collapse
Affiliation(s)
- Suryanarayan Somanathan
- From the Gene Therapy Program, Department of Pathology and Laboratory Medicine (S.S., F.J., Q.W., J.M.W.), Department of Nursing Research, School of Nursing (A.L.H.), and Departments of Medicine and Genetics and Cardiovascular Institute (D.J.R.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; and Discovery Sciences, Janssen, Pharmaceutical companies of Johnson and Johnson, Beerse, Belgium (F.J.)
| | - Frank Jacobs
- From the Gene Therapy Program, Department of Pathology and Laboratory Medicine (S.S., F.J., Q.W., J.M.W.), Department of Nursing Research, School of Nursing (A.L.H.), and Departments of Medicine and Genetics and Cardiovascular Institute (D.J.R.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; and Discovery Sciences, Janssen, Pharmaceutical companies of Johnson and Johnson, Beerse, Belgium (F.J.)
| | - Qiang Wang
- From the Gene Therapy Program, Department of Pathology and Laboratory Medicine (S.S., F.J., Q.W., J.M.W.), Department of Nursing Research, School of Nursing (A.L.H.), and Departments of Medicine and Genetics and Cardiovascular Institute (D.J.R.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; and Discovery Sciences, Janssen, Pharmaceutical companies of Johnson and Johnson, Beerse, Belgium (F.J.)
| | - Alexandra L Hanlon
- From the Gene Therapy Program, Department of Pathology and Laboratory Medicine (S.S., F.J., Q.W., J.M.W.), Department of Nursing Research, School of Nursing (A.L.H.), and Departments of Medicine and Genetics and Cardiovascular Institute (D.J.R.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; and Discovery Sciences, Janssen, Pharmaceutical companies of Johnson and Johnson, Beerse, Belgium (F.J.)
| | - James M Wilson
- From the Gene Therapy Program, Department of Pathology and Laboratory Medicine (S.S., F.J., Q.W., J.M.W.), Department of Nursing Research, School of Nursing (A.L.H.), and Departments of Medicine and Genetics and Cardiovascular Institute (D.J.R.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; and Discovery Sciences, Janssen, Pharmaceutical companies of Johnson and Johnson, Beerse, Belgium (F.J.).
| | - Daniel J Rader
- From the Gene Therapy Program, Department of Pathology and Laboratory Medicine (S.S., F.J., Q.W., J.M.W.), Department of Nursing Research, School of Nursing (A.L.H.), and Departments of Medicine and Genetics and Cardiovascular Institute (D.J.R.), Perelman School of Medicine, University of Pennsylvania, Philadelphia; and Discovery Sciences, Janssen, Pharmaceutical companies of Johnson and Johnson, Beerse, Belgium (F.J.)
| |
Collapse
|
140
|
Kawashita Y, Deb NJ, Garg MK, Kabarriti R, Fan Z, Alfieri AA, Roy-Chowdhury J, Guha C. An autologous in situ tumor vaccination approach for hepatocellular carcinoma. 2. Tumor-specific immunity and cure after radio-inducible suicide gene therapy and systemic CD40-ligand and Flt3-ligand gene therapy in an orthotopic tumor model. Radiat Res 2014; 182:201-10. [PMID: 24992166 DOI: 10.1667/rr13617.1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Diffuse hepatocellular carcinoma (HCC) is a lethal disease that radiation therapy (RT) currently has a limited role in treating because of the potential for developing fatal radiation-induced liver disease. However, recently diffuse HCC, "radio-inducible suicide gene therapy" has been shown to enhance local tumor control and residual microscopic disease within the liver for diffuse HCC, by using a combination of chemoactivation and molecular radiosensitization. We have demonstrated that the addition of recombinant adenovirus-expressing human Flt3 ligand (Adeno-Flt3L) after radio-inducible suicide gene therapy induced a Th1-biased, immune response and enhanced tumor control in an ectopic model of HCC. We hypothesized that sequential administration of recombinant adenovirus-expressing CD40L (Adeno-CD40L) could further potentiate the efficacy of our trimodal therapy with RT + HSV-TK + Adeno-Flt3L. We examined our hypothesis in an orthotopic model of diffuse HCC using BNL1ME A.7R.1 (BNL) cells in Balb/c mice. BNL murine hepatoma cells (5 × 10(4)) transfected with an expression vector of HSV-TK under the control of a radiation-inducible promoter were injected intraportally into BALB/cJ mice. Fourteen days after the HCC injection, mice were treated with a 25 Gy dose of radiation to the whole liver, followed by ganciclovir (GCV) treatment and systemic adenoviral cytokine gene therapy (Flt3L or CD40L or both). Untreated mice died in 27 ± 4 days. Radiation therapy alone had a marginal effect on survival (median = 35 ± 7 days) and the addition of HSV-TK/GCV gene therapy improved the median survival to 47 ± 6 days. However, the addition of Adeno-Flt3L to radiation therapy and HSV-TK/GCV therapy significantly (P = 0.0005) increased survival to a median of 63 ± 20 days with 44% (7/16) of the animals still alive 116 days after tumor implantation. The curative effect of Flt3L was completely abolished when using immunodeficient nude mice or mice depleted for CD4, CD8 and natural killer cells. The addition of Adeno-CD40L further improved the median survival of animals to 80 ± 15 days and this effect was abolished only when using anti-CD8 antibodies. Chromium-51 (51Cr) release assay showed cytotoxic T lymphocyte (CTL) activation, suggesting efficient dendritic cell (DC) activation with CTL activation after the treatment. Furthermore, when surviving mice were rechallenged with BNL-ETK cells on the foot pad, RT + HSV-TK/GCV + Flt3L + CD40L-treated mice developed a small tumor on day 56 but the tumor eventually disappeared after 105 days. Mice treated with RT + HSV-TK/GCV + Flt3L showed a slowed tumor growth curve compared with untreated mice. Therefore, combination therapy using Flt3L to induce DC proliferation and CD40L to enhance DC maturation holds great promise for immunomodulation of radiation therapy to enhance HCC tumor control and prevent progression of disease in patients with diffuse HCC.
Collapse
Affiliation(s)
- Yujo Kawashita
- a Department of Radiation Oncology, Albert Einstein College of Medicine and Montefiore Medical Center, Bronx, New York; and
| | | | | | | | | | | | | | | |
Collapse
|
141
|
Kawashita Y, Deb NJ, Garg M, Kabarriti R, Alfieri A, Takahashi M, Roy-Chowdhury J, Guha C. An autologous in situ tumor vaccination approach for hepatocellular carcinoma. 1. Flt3 ligand gene transfer increases antitumor effects of a radio-inducible suicide gene therapy in an ectopic tumor model. Radiat Res 2014; 182:191-200. [PMID: 24972258 DOI: 10.1667/rr13594.1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Hepatocellular carcinoma (HCC) often presents as a diffuse or multifocal tumor making it difficult to control by surgery or radiation. Radio-inducible herpes simplex virus thymidine kinase (HSV-TK) gene therapy has been shown to enhance local tumor control after radiation therapy (RT), while limiting the expression of the transgene in the irradiated tumor tissues. To prevent liver tumor recurrence and control systemic disease while limiting the potential bystander toxicity of HSV-TK therapy, we proposed to stimulate endogenous dendritic cell (DC) proliferation with systemic adenovirus Flt3 ligand (Adeno-Flt3L) gene therapy, followed by primary tumor radiation therapy combined with a radio-inducible HSV-TK gene therapy. We hypothesized that adenovirus-expressing Flt3L gene therapy will stimulate DC proliferation, allowing the upregulated DCs to locally harness tumor antigens released from HSV-TK/RT-treated HCC cells, thereby converting irradiated tumors to an autologous in situ tumor vaccine in mice with primary liver tumors. To test this hypothesis, an expression vector of HSV-TK was constructed under the control of a radio-inducible promoter early-growth response (Egr-TK) and a recombinant adenovirus-expressing human Flt3L was constructed. The Adeno-Flt3L [10(9) plaque forming units (pfu)] was administered intravenously on days 1 and 8 after radiation therapy. The murine hepatoma cell line (BNL1ME) was stably transfected by Egr-TK or Egr-Null (encoding no therapeutic gene). Palpable tumors in BALB/c mice were treated with a localized dose of 25 Gy of radiation followed by ganciclovir (GCV, 100 mg/kg, 14 days). Four treatment cohorts were compared: Egr-Null/GCV + RT + Adeno-LacZ; Egr-Null/GCV + RT + Adeno-Flt3L; Egr-TK/GCV + RT + Adeno-LacZ; and Egr-TK/GCV + RT + Adeno-Flt3L. There was no primary tumor regression in the Egr-Null tumors after radiation therapy alone. In contrast, Egr-TK tumors had nearly complete tumor regression for 3 weeks after radiation therapy (P < 0.01), however, long-term follow-up demonstrated primary tumor recurrence and death secondary to pulmonary metastasis. Flt3L expression was confirmed by serum bioassay (mean = 88 ng/mL) in these animals and Western blotting of tissue culture medium in Adeno-Flt3L-infected BaF/huFlt3L cells. Radiation therapy with Adeno-Flt3L gene therapy effectively retarded primary tumor growth when compared to radiation therapy alone. The trimodality therapy (Egr-TK/GCV + RT + Adeno-Flt3L) was the most efficacious with 40% complete tumor regression (>100 days) and <20% pulmonary metastases, indicating the development of sustained antitumor immune response. These studies provide a rationale for triple modality therapies with radiation-inducible HSV-TK gene therapy and Adeno-Flt3L when used in combination with primary tumor radiation therapy for improved local and systemic control of HCC.
Collapse
Affiliation(s)
- Yujo Kawashita
- a Department of Surgery, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | | | | | | | | | | | | | | |
Collapse
|
142
|
Knolle PA, Thimme R. Hepatic immune regulation and its involvement in viral hepatitis infection. Gastroenterology 2014; 146:1193-207. [PMID: 24412289 DOI: 10.1053/j.gastro.2013.12.036] [Citation(s) in RCA: 158] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Revised: 12/22/2013] [Accepted: 12/27/2013] [Indexed: 02/08/2023]
Abstract
The liver has unique immune regulatory functions that promote the induction of tolerance rather than responses to antigens encountered locally. These functions are mediated by local expression of coinhibitory receptors and immunosuppressive mediators that help prevent overwhelming tissue damage. Over the years, we have gained more insight into the local regulatory cues that determine the functional complexity of immune responses regulated locally in the liver. Both the unique hepatic microenvironment and the particular liver sinusoidal cell populations, in addition to hepatocytes, actively modulate immune responses locally in the liver and thereby determine the outcome of hepatic immune responses. This is of high biological and clinical relevance in hepatitis B virus and hepatitis C virus infections, which can cause acute and persistent infections associated with chronic inflammation in humans that eventually progress to cirrhosis and hepatocellular carcinoma. Here, we review current knowledge about the balance between immunity and tolerance in the liver and how this may affect our understanding of the determinants of hepatitis B virus and hepatitis C virus clearance, persistence, and virus-induced liver disease.
Collapse
Affiliation(s)
- Percy A Knolle
- Institute of Molecular Immunology, Technische Universität München and Institutes of Molecular Medicine and Experimental Immunology, Universität Bonn, Bonn.
| | - Robert Thimme
- Department of Medicine, Clinic for Gastroenterology, Hepatology, Endocrinology, Infectious Diseases, University Hospital Freiburg, Freiburg, Germany
| |
Collapse
|
143
|
Xu L, Yin W, Sun R, Wei H, Tian Z. Kupffer cell-derived IL-10 plays a key role in maintaining humoral immune tolerance in hepatitis B virus-persistent mice. Hepatology 2014; 59:443-52. [PMID: 23929689 DOI: 10.1002/hep.26668] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Accepted: 07/30/2013] [Indexed: 12/19/2022]
Abstract
UNLABELLED The liver is considered as a unique lymphoid organ favoring the induction of immune tolerance, rather than immunity. Biologists and clinicians alike have a long-standing interest in how the liver induces systemic immune tolerance, but the mechanism has not yet been well elucidated. Here, we employed hepatitis B virus (HBV)-carrier mice generated by hydrodynamically injecting phosphor-adeno-associated virus/HBV1.2 plasmid as a model for adult chronic HBV infection, which we found were unable to respond to hepatitis B surface antigen vaccination. Humoral tolerance induced in HBV-carrier mice could be transferred into Rag1(-/-) mice, because anti-HBV immunity in immunologically reconstituted Rag1(-/-) mice was inhibited by adoptive transfer of splenocytes from HBV-carrier mice. Humoral tolerance needed at least 7 days for induction and persisted to 3 months after a single HBV plasmid injection. Kupffer cell (KC) depletion or interleukin (IL-10) deficiency broke this humoral tolerance, and exogenous injection of IL-10 could effectively induce this tolerance. CONCLUSION KCs in HBV-carrier mice expressed more IL-10 and mediated the systemic tolerance induction in an IL-10-dependent manner. This previously undescribed humoral tolerance regarding HBV infection will help to explore new approaches to reverse liver-sustained systemic immune tolerance in liver disease.
Collapse
Affiliation(s)
- Long Xu
- Department of Immunology, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, China
| | | | | | | | | |
Collapse
|
144
|
Rogers GL, Martino AT, Zolotukhin I, Ertl HCJ, Herzog RW. Role of the vector genome and underlying factor IX mutation in immune responses to AAV gene therapy for hemophilia B. J Transl Med 2014; 12:25. [PMID: 24460861 PMCID: PMC3904690 DOI: 10.1186/1479-5876-12-25] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 01/23/2014] [Indexed: 11/24/2022] Open
Abstract
Background Self-complementary adeno-associated virus (scAAV) vectors have become a desirable vector for therapeutic gene transfer due to their ability to produce greater levels of transgene than single-stranded AAV (ssAAV). However, recent reports have suggested that scAAV vectors are more immunogenic than ssAAV. In this study, we investigated the effects of a self-complementary genome during gene therapy with a therapeutic protein, human factor IX (hF.IX). Methods Hemophilia B mice were injected intramuscularly with ss or scAAV1 vectors expressing hF.IX. The outcome of gene transfer was assessed, including transgene expression as well as antibody and CD8+ T cell responses to hF.IX. Results Self-complementary AAV1 vectors induced similar antibody responses (which eliminated systemic hF.IX expression) but stronger CD8+ T cell responses to hF.IX relative to ssAAV1 in mice with F9 gene deletion. As a result, hF.IX-expressing muscle fibers were effectively eliminated in scAAV-treated mice. In contrast, mice with F9 nonsense mutation (late stop codon) lacked antibody or T cell responses, thus showing long-term expression regardless of the vector genome. Conclusions The nature of the AAV genome can impact the CD8+ T cell response to the therapeutic transgene product. In mice with endogenous hF.IX expression, however, this enhanced immunogenicity did not break tolerance to hF.IX, suggesting that the underlying mutation is a more important risk factor for transgene-specific immunity than the molecular form of the AAV genome.
Collapse
Affiliation(s)
| | | | | | | | - Roland W Herzog
- Department of Pediatrics, Division of Cellular and Molecular Therapy, University of Florida, Gainesville, Florida, USA.
| |
Collapse
|
145
|
Sack BK, Herzog RW, Terhorst C, Markusic DM. Development of Gene Transfer for Induction of Antigen-specific Tolerance. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2014; 1:14013. [PMID: 25558460 PMCID: PMC4280786 DOI: 10.1038/mtm.2014.13] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Gene replacement therapies, like organ and cell transplantation are likely to introduce neo-antigens that elicit rejection via humoral and/or effector T cell immune responses. Nonetheless, thanks to an ever growing body of pre-clinical studies it is now well accepted that gene transfer protocols can be specifically designed and optimized for induction of antigen-specific immune tolerance. One approach is to specifically express a gene in a tissue with a tolerogenic microenvironment such as the liver or thymus. Another strategy is to transfer a particular gene into hematopoietic stem cells or immunological precursor cells thus educating the immune system to recognize the therapeutic protein as "self". In addition, expression of the therapeutic protein in pro-tolerogenic antigen presenting cells such as immature dendritic cells and B cells has proven to be promising. All three approaches have successfully prevented unwanted immune responses in pre-clinical studies aimed at the treatment of inherited protein deficiencies, e.g. lysosomal storage disorders and hemophilia, and of type I diabetes and multiple sclerosis. In this review we focus on current gene transfer protocols that induce tolerance, including gene delivery vehicles and target tissues, and discuss successes and obstacles in different disease models.
Collapse
Affiliation(s)
- Brandon K Sack
- Seattle Biomedical Research Institute, Seattle, Washington, USA
| | - Roland W Herzog
- Department of Pediatrics, University of Florida, Gainesville, Florida, USA
| | - Cox Terhorst
- Division of Immunology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston MA 02115. USA
| | - David M Markusic
- Department of Pediatrics, University of Florida, Gainesville, Florida, USA
| |
Collapse
|
146
|
Gao K, Li M, Zhong L, Su Q, Li J, Li S, He R, Zhang Y, Hendricks G, Wang J, Gao G. Empty Virions In AAV8 Vector Preparations Reduce Transduction Efficiency And May Cause Total Viral Particle Dose-Limiting Side-Effects. Mol Ther Methods Clin Dev 2014; 1:20139. [PMID: 25485285 PMCID: PMC4255953 DOI: 10.1038/mtm.2013.9] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Accepted: 11/12/2013] [Indexed: 02/05/2023]
Abstract
Empty virions are inadvertent by-products of recombinant adeno-associated virus (rAAV) packaging process, resulting in vector lots with mixtures of full and empty virions at variable ratios. Impact of empty virions on the efficiency and side-effects of rAAV transduction has not been well characterized. Here, we generated partially and completely empty AAV8 virions, fully packaged rAAV8 lots as well as mixtures of empty and fully packaged virions with variable ratios of empty virions (REVs). The aforementioned dosing formulations of rAAV8 expressing either cellular (EGFP or nuclear-targeted (n) LacZ) or secreted (human α1-antitrypsin, hA1AT) reporter genes were intravenously injected into two different mouse strains, followed by analyses of transgene expressions and serum alanine aminotransferase (ALT) levels at different time points. We found that addition of empty particles to the fixed doses of rAAV8 preparations repressed liver transduction up to 64% (serum hA1AT) and 44% (nLacZ) in C57BL/6 mice, respectively. The similar trend in inhibiting EGFP expression together with concurrent elevations of serum ATL levels were observed in the BALB/c mice, indicating that empty particles may also exacerbate side-effects of rAAV8EGFP transduction. Our results suggest that removal of empty particles from rAAV preparations may improve efficacy and safety of AAV in clinical applications.
Collapse
Affiliation(s)
- Kai Gao
- Gene Therapy Center, University of Massachusetts Medical School, Worcester, Massachusetts, USA
- National Institutes for Food and Drug Control, Beijing, China
| | - Mengxin Li
- Gene Therapy Center, University of Massachusetts Medical School, Worcester, Massachusetts, USA
- Viral Vector Core, University of Massachusetts Medical School, Worcester, Massachusetts, USA
- Department of Microbiology and Physiology Systems, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Li Zhong
- Gene Therapy Center, University of Massachusetts Medical School, Worcester, Massachusetts, USA
- Viral Vector Core, University of Massachusetts Medical School, Worcester, Massachusetts, USA
- Division of Hematology/Oncology, Department of Pediatrics, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Qin Su
- Gene Therapy Center, University of Massachusetts Medical School, Worcester, Massachusetts, USA
- Viral Vector Core, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Jia Li
- Gene Therapy Center, University of Massachusetts Medical School, Worcester, Massachusetts, USA
- Department of Microbiology and Physiology Systems, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Shaoyong Li
- Gene Therapy Center, University of Massachusetts Medical School, Worcester, Massachusetts, USA
- Department of Microbiology and Physiology Systems, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Ran He
- Gene Therapy Center, University of Massachusetts Medical School, Worcester, Massachusetts, USA
- Viral Vector Core, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Yu Zhang
- Gene Therapy Center, University of Massachusetts Medical School, Worcester, Massachusetts, USA
- Department of Oncology, Guizhou People’s Hospital, Guiyang, Guizhou, China
| | - Gregory Hendricks
- Department of Cell and Developmental Biology, Electron Microscopy Core Facility, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Junzhi Wang
- National Institutes for Food and Drug Control, Beijing, China
| | - Guangping Gao
- Gene Therapy Center, University of Massachusetts Medical School, Worcester, Massachusetts, USA
- Viral Vector Core, University of Massachusetts Medical School, Worcester, Massachusetts, USA
- Department of Microbiology and Physiology Systems, University of Massachusetts Medical School, Worcester, Massachusetts, USA
- Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| |
Collapse
|
147
|
Abstract
The liver is the largest organ in the body and is generally regarded by nonimmunologists as having little or no lymphoid function. However, such is far from accurate. This review highlights the importance of the liver as a lymphoid organ. Firstly, we discuss experimental data surrounding the role of liver as a lymphoid organ. The liver facilitates tolerance rather than immunoreactivity, which protects the host from antigenic overload of dietary components and drugs derived from the gut and it is instrumental to fetal immune tolerance. Loss of liver tolerance leads to autoaggressive phenomena, which if not controlled by regulatory lymphoid populations, may lead to the induction of autoimmune liver diseases. Liver-related lymphoid subpopulations also act as critical antigen-presenting cells. The study of the immunological properties of liver and delineation of the microenvironment of the intrahepatic milieu in normal and diseased livers provides a platform to understand the hierarchy of a series of detrimental events that lead to immune-mediated destruction of the liver and the rejection of liver allografts. The majority of emphasis within this review will be on the normal mononuclear cell composition of the liver. However, within this context, we will discuss selected, but not all, immune-mediated liver disease and attempt to place these data in the context of human autoimmunity.
Collapse
Affiliation(s)
- Dimitrios P Bogdanos
- Institute of Liver Studies, Transplantation Immunology and Mucosal Biology, King's College London School of Medicine at King's College Hospital, London, UK
| | | | | |
Collapse
|
148
|
Burghardt S, Erhardt A, Claass B, Huber S, Adler G, Jacobs T, Chalaris A, Schmidt-Arras D, Rose-John S, Karimi K, Tiegs G. Hepatocytes contribute to immune regulation in the liver by activation of the Notch signaling pathway in T cells. THE JOURNAL OF IMMUNOLOGY 2013; 191:5574-82. [PMID: 24140644 DOI: 10.4049/jimmunol.1300826] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The "liver tolerance effect" has been attributed to a unique potential of liver-resident nonprofessional APCs including hepatocytes (HCs) to suppress T cell responses. The exact molecular mechanism of T cell suppression by liver APCs is still largely unknown. In mice, IL-10-dependent T cell suppression is observed after Th1-mediated hepatitis induced by Con A. In this study, we show that HCs, particularly those from regenerating livers of Con A-pretreated mice, induced a regulatory phenotype in naive CD4(+) T cells in vitro. Using reporter mice, we observed that these T regulatory cells released substantial amounts of IL-10, produced IFN-γ, failed to express Foxp3, but suppressed proliferation of responder T cells upon restimulation with anti-CD3 mAb. Hence, these regulatory cells feature a similar phenotype as the recently described IL-10-producing Th1 cells, which are generated upon activation of Notch signaling. Indeed, inhibition of γ-secretase and a disintegrin and metalloproteinase 17 but not a disintegrin and metalloproteinase 10, respectively, which blocked Notch activation, prevented IL-10 secretion. HCs from Con A-pretreated mice showed enhanced expression of the Notch ligand Jagged1 and significantly increased receptor density of Notch1 on CD4(+) T cells. However, HCs from Con A-pretreated IFN regulatory factor 1(-/-) mice, which cannot respond to IFN-γ, as well as those from IFN-γ(-/-) mice failed to augment IL-10 production by CD4(+) T cells. In conclusion, it seems that HCs fine-tune liver inflammation by upregulation of Jagged1 and activation of Notch signaling in Th1 cells. This mechanism might be of particular importance in the regenerating liver subsequent to Th1-mediated hepatitis.
Collapse
Affiliation(s)
- Sven Burghardt
- Institute of Experimental Immunology and Hepatology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
149
|
The role of apoptosis in immune hyporesponsiveness following AAV8 liver gene transfer. Mol Ther 2013; 21:2227-35. [PMID: 24126962 DOI: 10.1038/mt.2013.94] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Accepted: 03/28/2013] [Indexed: 12/13/2022] Open
Abstract
Gene therapy provides a significant opportunity to treat a variety of inherited and acquired diseases. However, adverse immune responses toward the adeno-associated virus (AAV) antigens may limit its success. The mechanisms responsible for immunity or tolerance toward AAV-encoded transgene products remain poorly defined. Studies in mice demonstrate that AAV2/8 gene transfer to liver is associated with immunological hyporesponsiveness toward both AAV vector and antigenic transgene product. To evaluate the role of activation-induced cell death (AICD) and cytokine withdrawal (intrinsic cell death) in the deletion of mature T lymphocytes, we compared immunological responses in hepatic AAV2/8 transfer in murine recipients lacking the Fas receptor, and recipients overexpressing Bcl-xL, to WT murine counterparts. Prolonged transgene expression was dependent on both Fas signaling and Bcl-xL-regulated apoptosis in T cells. Abrogation of intrinsic cell death enhanced Th1 responses, whereas AICD functioned to limit neutralizing antibody production toward AAV2/8. In addition, immune hyporesponsiveness and stable transgene expression was dependent on upregulation of FasL expression on transduced hepatocytes and a corresponding apoptosis of infiltrating Fas (+) cells. These data provide evidence that both AICD and apoptosis due to cytokine withdrawal of lymphocytes are essential for immune hyporesponsiveness toward hepatic AAV2/8-encoded transgene product in the setting of liver gene transfer.
Collapse
|
150
|
Liver type I regulatory T cells suppress germinal center formation in HBV-tolerant mice. Proc Natl Acad Sci U S A 2013; 110:16993-8. [PMID: 24089450 DOI: 10.1073/pnas.1306437110] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The liver plays a critical role in inducing systemic immune tolerance, for example, during limiting hypersensitivity to food allergy and in rendering acceptance of allotransplant or even hepatotropic pathogens. We investigated the unknown mechanisms of liver tolerance by using an established hepatitis B virus (HBV)-carrier mouse model, and found that these mice exhibited an antigen-specific tolerance toward peripheral HBsAg vaccination, showing unenlarged draining lymph node (DLN), lower number of germinal centers (GC), and inactivation of GC B cells and follicular T helper (Tfh) cells. Both in vivo and in vitro immune responses toward HBsAg were suppressed by mononuclear cells from HBV-carrier mice, which were CD4(+) Foxp3(-) type 1 regulatory T (Tr1)-like cells producing IL-10. Using recipient Rag1(-/-) mice, hepatic Tr1-like cells from day 7 of HBV-persistent mice acquired the ability to inhibit anti-HBV immunity 3 d earlier than splenic Tr1-like cells, implying that hepatic Tr1-like cells were generated before those in spleen. Kupffer cell depletion or IL-10 deficiency led to impairment of Tr1-like cell generation, along with breaking HBV persistence. The purified EGFP(+)CD4(+) T cells (containing Tr1-like cells) from HBV-carrier mice trafficked in higher numbers to DLN in recipient mice after HBsAg vaccination, and subsequently inactivated both Tfh cells and GC B cells via secreting IL-10, resulting in impaired GC formation and anti-HB antibody production. Thus, our results indicate Tr1-like cells migrate from the liver to the DLN and inhibit peripheral anti-HBV immunity by negatively regulating GC B cells and Tfh cells.
Collapse
|