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Takahashi T, Hsiao HM, Tanaka S, Li W, Higashikubo R, Scozzi D, Bharat A, Ritter JH, Krupnick AS, Gelman AE, Kreisel D. PD-1 expression on CD8 + T cells regulates their differentiation within lung allografts and is critical for tolerance induction. Am J Transplant 2018; 18:216-225. [PMID: 28730633 PMCID: PMC5739961 DOI: 10.1111/ajt.14437] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 06/18/2017] [Accepted: 07/11/2017] [Indexed: 01/25/2023]
Abstract
Immunological requirements for rejection and tolerance induction differ between various organs. While memory CD8+ T cells are considered a barrier to immunosuppression-mediated acceptance of most tissues and organs, tolerance induction after lung transplantation is critically dependent on central memory CD8+ T lymphocytes. Here we demonstrate that costimulation blockade-mediated tolerance after lung transplantation is dependent on programmed cell death 1 (PD-1) expression on CD8+ T cells. In the absence of PD-1 expression, CD8+ T cells form prolonged interactions with graft-infiltrating CD11c+ cells; their differentiation is skewed towards an effector memory phenotype and grafts are rejected acutely. These findings extend the notion that requirements for tolerance induction after lung transplantation differ from other organs. Thus, immunosuppressive strategies for lung transplant recipients need to be tailored based on the unique immunological properties of this organ.
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Affiliation(s)
- T Takahashi
- Department of Surgery, Washington University in St. Louis
| | - HM Hsiao
- Department of Surgery, Washington University in St. Louis
| | - S Tanaka
- Department of Surgery, Washington University in St. Louis
| | - W Li
- Department of Surgery, Washington University in St. Louis
| | - R Higashikubo
- Department of Surgery, Washington University in St. Louis
| | - D Scozzi
- Department of Surgery, Washington University in St. Louis
| | - A Bharat
- Department of Surgery, Northwestern University
| | - JH Ritter
- Department of Pathology & Immunology, Washington University in St. Louis
| | - AS Krupnick
- Department of Surgery, University of Virginia
| | - AE Gelman
- Department of Surgery, Washington University in St. Louis,Department of Pathology & Immunology, Washington University in St. Louis
| | - D Kreisel
- Department of Surgery, Washington University in St. Louis,Department of Pathology & Immunology, Washington University in St. Louis,Corresponding author: Daniel Kreisel, M.D., Ph.D., Professor of Surgery, Pathology & Immunology, Campus Box 8234, 660 South Euclid Avenue, Washington University School of Medicine, St. Louis, MO 63110, Tel: (314) 362-6021, Fax: (314) 367-8459,
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2
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Subramanian V, Ramachandran S, Banan B, Bharat A, Wang X, Benshoff N, Kreisel D, Gelman AE, Mohanakumar T. Immune response to tissue-restricted self-antigens induces airway inflammation and fibrosis following murine lung transplantation. Am J Transplant 2014; 14:2359-66. [PMID: 25220332 PMCID: PMC4169463 DOI: 10.1111/ajt.12908] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 04/08/2014] [Accepted: 04/13/2014] [Indexed: 01/25/2023]
Abstract
Immune responses against lung-associated self-antigens (self-Ags) are hypothesized to play a role in the development of chronic lung graft rejection. We determined whether immune responses to lung self-Ags, K-alpha-1-tubulin (Kα1T) and Collagen V (Col-V) in the absence of alloimmunity, could promote airway inflammation and fibrosis. Following syngeneic murine orthotopic lung transplantation (LTx) we administered antibodies (Abs) to either Kα1T or Col-V or in combination to both of these self-Ags. As compared to recipients of isotype control Abs, Kα1T Abs and/or Col-V Abs-treated recipients had marked lung graft cellular infiltration and bronchiolar fibrosis. This inflammation was also associated the accumulation of Kα1T and Col-V-specific interferon-γ+ and IL-17+ T cells. Notably, the administration of Abs to Kα1T led to cellular and humoral immune responses to Col-V prior to development of fibrosis, and vice versa, indicating that epitope spreading can occur rapidly in an alloantigen independent manner. Collectively, these data support a model of chronic LTx rejection where the progressive loss of self-tolerance through epitope spreading promotes airway fibrosis. Strategies that target autoreactive Abs may be useful to inhibit chronic rejection of lung grafts.
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Affiliation(s)
- V. Subramanian
- Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - S. Ramachandran
- Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | | | - A. Bharat
- Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - X. Wang
- Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - N. Benshoff
- Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - D. Kreisel
- Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - A. E. Gelman
- Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - T. Mohanakumar
- Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA,Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA
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3
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Gelman AE, Scozzi D. Activating killers by stimulating RAGE. Am J Transplant 2013; 13:2237-8. [PMID: 24034705 DOI: 10.1111/ajt.12367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 06/04/2013] [Accepted: 06/06/2013] [Indexed: 01/25/2023]
Affiliation(s)
- A E Gelman
- Department of Surgery, Washington University School of Medicine, St. Louis, MO; Pathology & Immunology, Washington University School of Medicine, St. Louis, MO
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4
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Tiriveedhi V, Takenaka M, Ramachandran S, Gelman AE, Subramanian V, Patterson GA, Mohanakumar T. T regulatory cells play a significant role in modulating MHC class I antibody-induced obliterative airway disease. Am J Transplant 2012; 12:2663-74. [PMID: 22822907 PMCID: PMC3459183 DOI: 10.1111/j.1600-6143.2012.04191.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The molecular mechanisms leading to the development of chronic lung allograft dysfunction following de novo development of antibodies to mismatched donor MHC remain undefined. We demonstrated that intrabronchial administration of antibodies to MHC class I resulted in induction of both innate and adaptive cellular immune responses characterized by a predominance of Th17 specific to lung associated self-antigens Kα1-tubulin and Collagen-V leading to the development of obliterative airway lesions (OAD), correlate of chronic rejection following human lung transplantation. To determine the role of regulatory T cells (Treg) in the pathogenesis of OAD, we administered anti-MHC class I to mice, in which Treg were depleted by conditional ablation of FoxP3+cells. Under this condition, we observed a threefold increase in pulmonary cellular infiltration, luminal occlusion and fibrous deposition when compared anti-MHC class I Ab administered mice maintaining FoxP3. OAD lesions were accompanied with enhanced accumulation of neutrophils along with self-antigen-specific Th17 and humoral responses. However, IL-17-blockade or adoptive transfer of Treg abrogated OAD. We conclude that Treg exerts a suppressive effect on anti-MHC induced IL-8-mediated neutrophil infiltration and innate immune responses that leads to inhibition of Th17 immune responses to lung associated self-antigens which is critical for development of OAD.
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Affiliation(s)
- V. Tiriveedhi
- Department of Surgery, Washington University School of Medicine, St Louis, MO, USA
| | - M. Takenaka
- Department of Surgery, Washington University School of Medicine, St Louis, MO, USA
| | - S. Ramachandran
- Department of Surgery, Washington University School of Medicine, St Louis, MO, USA
| | - A. E. Gelman
- Department of Surgery, Washington University School of Medicine, St Louis, MO, USA
| | - V Subramanian
- Department of Surgery, Washington University School of Medicine, St Louis, MO, USA
| | | | - T. Mohanakumar
- Department of Surgery, Washington University School of Medicine, St Louis, MO, USA
,Pathology and Immunology, Washington University School of Medicine, St Louis, MO, USA
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Gelman AE, Okazaki M, Sugimoto S, Li W, Kornfeld CG, Lai J, Richardson SB, Kreisel FH, Huang HJ, Tietjens JR, Zinselmeyer BH, Patterson GA, Miller MJ, Krupnick AS, Kreisel D. CCR2 regulates monocyte recruitment as well as CD4 T1 allorecognition after lung transplantation. Am J Transplant 2010; 10:1189-99. [PMID: 20420631 PMCID: PMC3746750 DOI: 10.1111/j.1600-6143.2010.03101.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Graft rejection remains a formidable problem contributing to poor outcomes after lung transplantation. Blocking chemokine pathways have yielded promising results in some organ transplant systems. Previous clinical studies have demonstrated upregulation of CCR2 ligands following lung transplantation. Moreover, lung injury is attenuated in CCR2-deficient mice in several inflammatory models. In this study, we examined the role of CCR2 in monocyte recruitment and alloimmune responses in a mouse model of vascularized orthotopic lung transplantation. The CCR2 ligand MCP-1 is upregulated in serum and allografts following lung transplantation. CCR2 is critical for the mobilization of monocytes from the bone marrow into the bloodstream and for the accumulation of CD11c(+) cells within lung allografts. A portion of graft-infiltrating recipient CD11c(+) cells expresses both recipient and donor MHC molecules. Two-photon imaging demonstrates that recipient CD11c(+) cells are associated with recipient T cells within the graft. While recipient CCR2 deficiency does not prevent acute lung rejection and is associated with increased graft infiltration by T cells, it significantly reduces CD4(+) T(h)1 indirect and direct allorecognition. Thus, CCR2 may be a potential target to attenuate alloimmune responses after lung transplantation.
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Affiliation(s)
- A. E. Gelman
- Department of Surgery, Washington University in St. Louis, St. Louis, MO,Department of Pathology and Immunology, Washington University in St. Louis, St. Louis, MO
| | - M. Okazaki
- Department of Surgery, Washington University in St. Louis, St. Louis, MO
| | - S. Sugimoto
- Department of Surgery, Washington University in St. Louis, St. Louis, MO
| | - W. Li
- Department of Surgery, Washington University in St. Louis, St. Louis, MO
| | - C. G. Kornfeld
- Department of Surgery, Washington University in St. Louis, St. Louis, MO
| | - J. Lai
- Department of Surgery, Washington University in St. Louis, St. Louis, MO
| | - S. B. Richardson
- Department of Surgery, Washington University in St. Louis, St. Louis, MO
| | - F. H. Kreisel
- Department of Pathology and Immunology, Washington University in St. Louis, St. Louis, MO
| | - H. J. Huang
- Department of Medicine, Washington University in St. Louis, St. Louis, MO
| | - J. R. Tietjens
- Department of Surgery, Washington University in St. Louis, St. Louis, MO
| | - B. H. Zinselmeyer
- Department of Pathology and Immunology, Washington University in St. Louis, St. Louis, MO
| | - G. A. Patterson
- Department of Surgery, Washington University in St. Louis, St. Louis, MO
| | - M. J. Miller
- Department of Medicine, Washington University in St. Louis, St. Louis, MO
| | - A. S. Krupnick
- Department of Surgery, Washington University in St. Louis, St. Louis, MO
| | - D. Kreisel
- Department of Surgery, Washington University in St. Louis, St. Louis, MO,Department of Pathology and Immunology, Washington University in St. Louis, St. Louis, MO,Corresponding author: Daniel Kreisel,
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Okazaki M, Sugimoto S, Lai J, Kornfeld CG, Hotchkiss RS, Richardson SB, Li W, Kreisel FH, Huang HJ, Patterson GA, Krupnick AS, Gelman AE, Kreisel D. Costimulatory blockade-mediated lung allograft acceptance is abrogated by overexpression of Bcl-2 in the recipient. Transplant Proc 2009; 41:385-7. [PMID: 19249562 DOI: 10.1016/j.transproceed.2008.10.068] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2008] [Accepted: 10/06/2008] [Indexed: 11/29/2022]
Abstract
Lung allografts are considered to be more immunogenic than other solid organs. Little is known about the effectiveness of immunosuppressive regimens after lung transplantation. Herein, we describe a novel model of murine vascularized orthotopic lung transplantation we used to study the effects of costimulatory blockade on lung rejection. Transplants were performed in the Balb --> B6 strain combination. Recipients were either not immunosuppressed or received perioperative CD40/CD40L and CD28/B7 costimulatory blockade. Nonimmunosupressed Balb/c --> B6 lung transplants had severe acute rejection 7 days after transplantation and CD8(+) T cells outnumbered CD4(+) T cells within the allografts. Alternatively, B6 recipients that received perioperative costimulatory blockade had minimal inflammation and there were nearly equal numbers of CD8(+) and CD4(+) T cells in these grafts. Approximately one third of graft-infiltrating CD4(+) T cells expressed Foxp3. CD4(+) T cells isolated from these grafts induced apoptosis of alloreactive CD8(+) T cells that were stimulated with donor splenocytes in vitro. In contrast with wild-type B6 recipient mice, we observed severe rejection of Balb/c lungs 7 days after transplantation into Bcl-2 transgenic B6 recipients that had received costimulatory blockade. CD8(+) T cells outnumbered CD4(+) T cells in these immunosuppressed Bcl-2 transgenic recipients and, compared with immunosuppressed wild-type B6 recipients, a lower percentage of graft-infiltrating CD4(+) T cells expressed Foxp3, and a higher percentage of graft-infiltrating CD8(+) T cells expressed intereferon-gamma. Thus, our results show that perioperative blockade of the CD40/CD40L and CD28/B7 costimulatory pathways markedly ameliorates acute rejection of lung allografts in wild type but not Bcl-2 transgenic recipients.
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Affiliation(s)
- M Okazaki
- Department of Surgery, Washington University in St. Louis, St. Louis, Missourri 63110-1013, USA
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8
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Sugimoto S, Lin X, Okazaki M, Lai J, Tietjens JR, Huang H, Patterson GA, Krupnick AS, Kreisel D, Gelman AE. Monocyte differentiation is controlled by MyD88 after mouse orthotopic lung transplantation. Transplant Proc 2009; 41:388-90. [PMID: 19249563 DOI: 10.1016/j.transproceed.2008.09.064] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2008] [Accepted: 09/18/2008] [Indexed: 12/24/2022]
Abstract
In lung grafts, ischemia-reperfusion signals rapidly induce the recruitment and differentiation of host monocytes into macrophages and dendritic cells. The nature of ischemia-reperfusion signals are antigen independent, but have been hypothesized to initiate Toll-like receptor (TLR) and interleukin (IL)-1R-mediated signaling pathways that are thought to potentiate alloimmune responses. We wondered whether MyD88, an adaptor molecule critical for both TLR and IL-1R-mediated inflammatory responses, regulated monocyte differentiation in a mouse model of vascularized orthotopic lung transplantation. Orthotopic left lung transplants were performed in the following syngeneic combinations: CD45.1(+) B6 --> CD45.2(+) MyD88(-/-) and CD45.1(+) B6 --> CD45.2(+) B6. One day later, recipient-derived dendritic cells and macrophage numbers were assessed in the bronchiolar lavage by FACS analysis. Compared with the bronchiolar lavage of wildtype recipients, MyD88(-/-) recipients had lower numbers of dendritic cells in lung graft airways that were of recipient origin. Lower numbers of newly differentiated lung graft dendritic cells was coincident with the appearance of higher numbers of undifferentiated monocytes in the lung airways of MyD88(-/-) recipients as compared with wild-type recipients. Moreover, adoptive transfer experiments demonstrated that MyD88(-/-) monocytes were poorer at differentiating into lung dendritic cells as compared with wild-type monocytes. Taken together, these data show that MyD88 regulates graft-infiltrating monocyte differentiation and suggests a mechanism by which TLR/IL-1R-signaling pathways control adaptive responses in lung allografts through controlling monocyte fate.
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Affiliation(s)
- S Sugimoto
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missourri 63110-1013, USA
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Okazaki M, Krupnick AS, Kornfeld CG, Lai JM, Ritter JH, Richardson SB, Huang HJ, Das NA, Patterson GA, Gelman AE, Kreisel D. A mouse model of orthotopic vascularized aerated lung transplantation. Am J Transplant 2007; 7:1672-9. [PMID: 17511692 DOI: 10.1111/j.1600-6143.2007.01819.x] [Citation(s) in RCA: 126] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Outcomes after lung transplantation are markedly inferior to those after other solid organ transplants. A better understanding of cellular and molecular mechanisms contributing to lung graft injury will be critical to improve outcomes. Advances in this field have been hampered by the lack of a mouse model of lung transplantation. Here, we report a mouse model of vascularized aerated single lung transplantation utilizing cuff techniques. We show that syngeneic grafts have normal histological appearance with minimal infiltration of T lymphocytes. Allogeneic grafts show acute cellular rejection with infiltration of T lymphocytes and recipient-type antigen presenting cells. Our data show that we have developed a physiological model of lung transplantation in the mouse, which provides ample opportunity for the study of nonimmune and immune mechanisms that contribute to lung allograft injury.
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Affiliation(s)
- M Okazaki
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University in St. Louis, St. Louis, MO, USA
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Okazaki M, Kreisel F, Richardson SB, Kreisel D, Krupnick AS, Patterson GA, Gelman AE. Sphingosine 1-phosphate inhibits ischemia reperfusion injury following experimental lung transplantation. Am J Transplant 2007; 7:751-8. [PMID: 17391120 DOI: 10.1111/j.1600-6143.2006.01710.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Ischemia reperfusion (I/R) injury following lung transplantation is exacerbated by the destruction of the endothelial cell barrier leading to pulmonary edema and dysregulated activated lymphocyte migration. Sphingosine 1-phosphate (S1P), a G-coupled protein receptor (GPCR) agonist, has been previously shown to promote endothelial cell tight junction formation and prevent monocyte chemotaxis. We asked if S1P treatment could improve pulmonary function and attenuate I/R injury following syngeneic rat lung transplantation. In comparison to vehicle-treated recipients, S1P administered before reperfusion significantly improved recipient oxygenation following transplantation. Improved graft function was associated with reduced inflammatory signaling pathway activation along with attenuated intragraft levels of MIP-2, TNF-alpha and IL-1beta. Moreover, S1P-treated recipients had significantly less apoptotic endothelial cells, pulmonary edema and graft accumulation of neutrophils than did vehicle-treated recipients. Thus our data show that S1P improves lung tissue homeostasis following reperfusion by enhancing endothelial barrier function and blunting monocytic graft infiltration and inflammation.
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Affiliation(s)
- M Okazaki
- Department of Surgery, Division of Cardiothoracic Surgery, Washington University School of Medicine, St. Louis, MO, USA
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Olthoff KM, Gelman AE, Zamir GA, Debonera F, Krasinkas AM, Shen X, Gao F, Shaked A. Pattern of alloimmune response in second same donor allografts after induction of tolerance using CTLA4Ig. Transplantation 2001; 72:1952-6. [PMID: 11773895 DOI: 10.1097/00007890-200112270-00015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND The pattern of allograft acceptance in the presence of costimulatory blockade is manifested by the sequential appearance of Th1 cells, followed by Th2 cells. The aim of this study was to examine whether this phenomenon repeats itself after second same donor allotransplantation, hoping to determine whether acceptance in this setting provokes a predominance of the Th2 response. METHODS Tolerance was achieved by transplantation of CTLA4Ig-transduced ACI liver allografts in Lewis recipients. Recipient long-term survivors received a second transplant, consisting of a cervical heterotopic heart from the same ACI donor strain. Animals were sacrificed at predetermined intervals following the second transplant and the heart and liver were processed for histology and cytokine mRNA expression. RESULTS Recipients of CTLA4Ig-transduced livers survived indefinitely. Rechallenge with same donor strain second allograft was manifested by an anergic immune response in the second cardiac allograft, and a very mild transient infiltrate within the first accepted liver graft. Cardiac function was maintained with resolution of all infiltrates. The cytokine cascade was activated within the allografts; however, the pattern of acceptance was not associated with predominance of a specific Th subtype. CONCLUSIONS The pattern of acceptance of an allograft following CTLA4Ig-mediated costimulatory blockade is not related to long-term predominance of Th2 cells, a phenomenon that may be unique to the setting of a tolerant liver. It may be likely that the infiltrating lymphocytes that are dominant in the second graft are suppressed by other memory mechanisms.
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Affiliation(s)
- K M Olthoff
- Department of Surgery, University of Pennsylvania, Philadelphia, PA 19104, USA
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12
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Zamir G, Gelman AE, Debonera F, Hardwigsen J, Que X, Aldeguer X, Martin M, Shaked A, Olthoff KM. Modified AdCTLA-4 vector blocks alloimmune response in vitro. J Surg Res 2001; 97:155-8. [PMID: 11341792 DOI: 10.1006/jsre.2001.6142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Gene transfer of the costimulatory blockade molecule CTLA-4Ig into cold-preserved rat liver allografts results in indefinite allograft survival. Despite local delivery, this mode of immunomodulation is associated with systemic immunosuppression. In an effort to restrict immunosuppression to the graft, we have constructed a novel adenoviral vector, AdCTLA-4ex-TAG, in which the Ig sequence of CTLA-4Ig DNA has been deleted to destabilize the gene product to promote rapid extrahepatic degradation while maintaining its immunosuppressive activity within the graft milieu. METHODS (1) Vector construction. CTLA-4 extracellular binding domain (CTLA-4ex) was prepared by PCR-based cloning methods and fused in frame to a genetic element encoding an epitope TAG allowing identification of the transgene product CTLA-4exTAG. CTLA-4exTAG was subcloned into a shuttle vector enabling isolation of AdCTLA-4exTAG. (2) In vitro transfection: AdCTLA-4exTAG was transfected into MH(1)C(1) cells and then supernatant was recovered for Western blot analysis. (3) In vitro alloimmune response was characterized by CFSE proliferation assay. (4) Extrahepatic effect of AdCTLA-4exTAG was characterized by the ability to control tumor growth after implantation of a regressive, immune sensitive cancer cell line (REGb) in the skin of BDIX rats after liver transduction with AdCTLA-4exTAG. RESULTS Expression and secretion of the recombinant protein were documented by Western blot after infection of the MH(1)C(1) cell line() with AdCTLA-4exTAG. Addition of infected MH(1)C(1) cell supernatant resulted in abrogation of alloimmune response as shown by markedly diminished division of CD4(+) T cells in a CFSE proliferation assay. Extrahepatic tumor regressed normally after liver transduction with AdCTLA-4exTAG. CONCLUSIONS These results show efficient in vitro expression of CTLA-4exTAG after transfection with AdCTLA-4exTAG. The modified protein retains its ability to abrogate in vitro alloimmune response. Efficient control of extrahepatic tumor growth after liver-directed delivery of AdCTLA-4exTAG suggests that the immunosuppressive effect of this vector is restricted to the liver. These results set the ground for the utilization of this novel adenoviral vector in the transplant setting.
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Affiliation(s)
- G Zamir
- Department of Surgery, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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Debonera F, Aldeguer X, Shen X, Gelman AE, Gao F, Que X, Greenbaum LE, Furth EE, Taub R, Olthoff KM. Activation of interleukin-6/STAT3 and liver regeneration following transplantation. J Surg Res 2001; 96:289-95. [PMID: 11266286 DOI: 10.1006/jsre.2001.6086] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Every liver that is procured, stored, and transplanted experiences injury from cold ischemia and reperfusion. Most recover quickly, but some grafts sustain enough injury to result in prolonged organ dysfunction or require retransplantation. The molecular mechanisms involved in early graft function and recovery following cold ischemia and reperfusion (I/R) after liver transplantation have not been well defined. Interleukin (IL)-6 is a critical factor in the mitogenic response within the liver, and is important for cell cycle progression and protection from injury. Activation of the latent transcription factor, STAT3, is dependent on IL-6 release. The role of the IL-6/STAT3 pathway and hepatocellular regeneration in graft recovery and cell cycle progression following cold ischemia and reperfusion was studied in a rat liver transplant orthotopic (OLT) model. Methods. Rat OLT was performed in a syngeneic model. The presence, time course, and magnitude of expression of IL-6, STAT3 activation, and upregulation of target immediate early genes were determined in liver grafts with minimal (<1 h) and prolonged (12 h) cold preservation times followed by transplantation. Progression of the cell cycle and replication was confirmed by BrdU uptake. RESULTS Prolonged cold ischemia resulted in increased IL-6 expression and STAT3 activation. This correlated with upregulation of junB, c-fos, c-myc, and c-jun, immediate early genes associated with hepatic regeneration. Extensive DNA replication was present in livers with 12-h ischemia, demonstrating successful completion of the cell cycle. CONCLUSIONS The participation of the IL-6/STAT3 pathway leading to cell cycle progression and regeneration is an important component in the recovery of organs immediately following cold preservation and transplantation.
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Affiliation(s)
- F Debonera
- Department of Surgery, University of Pennsylvania, Philadelphia 19104, USA
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14
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Krasinskas AM, Eiref SD, McLean AD, Kreisel D, Gelman AE, Popma SH, Moore JS, Rosengard BR. Replacement of graft-resident donor-type antigen presenting cells alters the tempo and pathogenesis of murine cardiac allograft rejection. Transplantation 2000; 70:514-21. [PMID: 10949196 DOI: 10.1097/00007890-200008150-00020] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Graft-resident antigen presenting cells (APCs) are potent stimulators of the alloresponse. To test whether replacement of graft-resident donor-type APCs with those of recipient-type alters allorecognition and the pathogenesis of both acute and chronic rejection, we created chimeric hearts for transplantation into naive recipients. METHODS To replace donor-type APCs with those of recipient-type, chimeric animals were created by bone marrow transplantation (BMT) in fully allogeneic mouse and rat strain combinations. The degree of APC replacement in chimeric organs was assessed phenotypically and functionally. Chimeric hearts were transplanted heterotopically into untreated recipients. RESULTS Flow cytometric and immunohistochemical analysis did not detect residual bone marrow recipient-type APCs in mouse BMT chimeras. Although semi-quantitative reverse transcription polymerase chain reaction detected 0.001-0.01% residual cells, APCs isolated from chimeric organs were functionally unable to stimulate donor-type cells. When transplanted into naive recipients, chimeric mouse hearts had significantly prolonged survival but were nevertheless rejected acutely. Similar results were obtained in the ACI --> LEW rat strain combination. However, in the PVG --> DA rat model, the majority of chimeric hearts survived >100 days and all long-surviving hearts developed cardiac allograft vasculopathy. CONCLUSIONS BMT leads to near complete replacement of organ-resident APCs. The virtual absence of donor-type APCs in chimeric hearts delays or prevents acute rejection in a strain-dependent manner. In contrast, this type of graft modification does not prevent cardiac allograft vasculopathy. This suggests that, although the CD4+ direct pathway may play a role in acute rejection, it is not essential for the development of chronic rejection in rodent cardiac allografts.
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Affiliation(s)
- A M Krasinskas
- Department of Pathology and Laboratory Medicine, University of Pennsylvania Health System, Philadelphia 19104, USA
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Olthoff KM, Judge TA, Gelman AE, da Shen X, Hancock WW, Turka LA, Shaked A. Adenovirus-mediated gene transfer into cold-preserved liver allografts: survival pattern and unresponsiveness following transduction with CTLA4Ig. Nat Med 1998; 4:194-200. [PMID: 9461193 DOI: 10.1038/nm0298-194] [Citation(s) in RCA: 116] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The immune response of liver transplant recipients was modulated via adenovirus-mediated transduction of the cold-preserved liver with sequences encoding CTLA4Ig. Transplanted allografts demonstrated rapid transient local expression and recombinant protein production shortly after revascularization, resulting in intact liver function, indefinite survival of the recipient, and the development of donor-specific unresponsiveness. Lymphocytic infiltration of the graft was mainly of the T helper 2 (Th2) subset and was not associated with injury to primary cellular targets of the alloimmune response. These findings demonstrate a successful outcome of a feasible and potentially clinically relevant system of gene delivery of sequences encoding proteins capable of inhibiting the alloimmune response.
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Affiliation(s)
- K M Olthoff
- Department of Surgery, University of Pennsylvania, Philadelphia 19104, USA.
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