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Ota T, Goto R, Harada T, Forgioni A, Kanazawa R, Ganchiku Y, Kawamura N, Watanabe M, Fukai M, Shimamura T, Taketomi A. TCF1highPD-1+Ly108+CD8+ T Cells Are Associated with Graft Preservation in Sensitized Mice Treated with Non-Fc Receptor-Binding CD3 Antibodies. Immunohorizons 2024; 8:295-306. [PMID: 38587418 PMCID: PMC11066723 DOI: 10.4049/immunohorizons.2300117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Accepted: 02/27/2024] [Indexed: 04/09/2024] Open
Abstract
The non-Fc-binding anti-CD3 Ab [anti-CD3F(ab')2] can induce graft acceptance depending on the therapeutic window in a rodent heart transplant model. The delayed protocol allows for early graft infiltration of lymphocytes, which may behave in an inhibitory manner. We investigated the most effective protocol for anti-CD3F(ab')2 in sensitized conditions to confirm the evidence for clinical application. C57BL/6 mice were sensitized with BALB/c tail skin grafts and transplanted with BALB/c heart grafts at 8-12 wk after sensitization. Fifty micrograms of anti-CD3F(ab')2 was administered daily for 5 consecutive days on days 1-5 (day 1 protocol) or days 3-7 (delayed protocol). In nonsensitized mice, the delayed protocol significantly prolonged graft survival after transplantation from BALB/c to naive B6 (median survival time [MST], >100 d). In contrast, the delayed protocol was unable to prevent graft rejection in sensitized mice (MST, 5 d). A significantly increased percentage of granzyme B+ CD8+ T cells was observed in the graft on day 3 posttransplantation in sensitized conditions. Further, the day 1 protocol significantly prolonged graft survival (MST, 18 d), even in sensitized conditions. Day 1 treatment significantly increased the percentage of Foxp3+CD25+CD4+ T cells and phenotypically changed CD8+ T cells in the graft (i.e., caused a significant increase in the proportion of Ly108+TCF1highPD-1+CD8+ T cells). In conclusion, different timings of delayed anti-CD3F(ab')2 treatment promoted allograft preservation in association with phenotypic changes in CD4+ and CD8+ T cells in the graft under sensitized conditions.
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Affiliation(s)
- Takuji Ota
- Department of Gastroenterological Surgery I, Hokkaido University, Sapporo, Japan
| | - Ryoichi Goto
- Department of Gastroenterological Surgery I, Hokkaido University, Sapporo, Japan
| | - Takuya Harada
- Department of Gastroenterological Surgery I, Hokkaido University, Sapporo, Japan
| | - Agustina Forgioni
- Department of Gastroenterological Surgery I, Hokkaido University, Sapporo, Japan
| | - Ryo Kanazawa
- Department of Gastroenterological Surgery I, Hokkaido University, Sapporo, Japan
| | - Yoshikazu Ganchiku
- Department of Gastroenterological Surgery I, Hokkaido University, Sapporo, Japan
| | - Norio Kawamura
- Department of Transplant Surgery, Hokkaido University, Sapporo, Japan
| | - Masaaki Watanabe
- Department of Transplant Surgery, Hokkaido University, Sapporo, Japan
| | - Moto Fukai
- Department of Gastroenterological Surgery I, Hokkaido University, Sapporo, Japan
| | - Tsuyoshi Shimamura
- Division of Organ Transplantation, Hokkaido University Hospital, Sapporo, Japan
| | - Akinobu Taketomi
- Department of Gastroenterological Surgery I, Hokkaido University, Sapporo, Japan
- Department of Transplant Surgery, Hokkaido University, Sapporo, Japan
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2
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Khalifian S, Raimondi G, Lee WA, Brandacher G. Taming inflammation by targeting cytokine signaling: new perspectives in the induction of transplantation tolerance. Immunotherapy 2015; 6:637-53. [PMID: 24896631 DOI: 10.2217/imt.14.25] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Transplantation tolerance remains an elusive goal, partly due to limitations in our understanding of the interplay between inflammatory mediators and their role in the activation and regulation of T lymphocytes. Although multiple mechanisms acting both centrally and peripherally are responsible for tolerance induction, the signaling pathways leading to activation or regulation of adaptive immunity are often complex, branched, redundant and modulated by the microenvironment's inflammatory milieu. Accumulating evidence clearly indicates that inflammatory cytokines limit the tolerogenic potential of immunomodulatory protocols by supporting priming of the immune system and counteracting regulatory mechanisms, ultimately promoting rejection. In this review, we summarize recent progress in the development of novel therapeutics to manipulate this inflammatory environment and achievements in targeted inhibition of inflammatory cytokine signaling. Ultimately, robust transplant tolerance induction will probably require a multifaceted, holistic approach that integrates the various mechanisms of tolerance induction, incorporates the dynamic alterations in costimulatory requirements of alloreactive T cells, while maintaining endogenous mechanisms of immune regulation.
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Affiliation(s)
- Saami Khalifian
- Department of Plastic and Reconstructive Surgery, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
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3
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Wang H, Zhang Z, Tian W, Liu T, Han H, Garcia B, Li XC, Du C. Memory T Cells Mediate Cardiac Allograft Vasculopathy and are Inactivated by Anti-OX40L Monoclonal Antibody. Cardiovasc Drugs Ther 2014; 28:115-22. [PMID: 24254032 PMCID: PMC4539019 DOI: 10.1007/s10557-013-6502-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
PURPOSE Cardiac allograft vasculopathy (CAV) is a major complication limiting the long-term survival of cardiac transplants. The role of memory T cells (Tmem) in the pathogenesis of CAV remains elusive. This study investigated the role of Tmem cells in the development of CAV and the therapeutic potential of targeting the OX40/OX40L pathway for heart transplant survival. METHODS Tmem cells were generated in Rag-1(-/-) C57BL/6 (B6) mice by homeostatic proliferation (HP) of CD40L null CD3(+) T cells from B6 mice. Rag-1(-/-) B6 mice (H-2(b)) harboring Tmem cells received cardiac allografts from BALB/c mice (H-2(d)), and were either untreated or treated with anti-OX40L monoclonal antibody (mAb) (0.5 mg/mouse/day) for 10 days. RESULTS Six weeks after HP, the majority of transferred CD40L(-/-) T cells in Rag-1(-/-) B6 mice were differentiated to CD44(high) and CD62L(low) Tmem cells. BALB/c heart allografts in Rag-1(-/-) B6 recipient mice in the presence of these Tmem cells developed a typical pathological feature of CAV; intimal thickening, 100 days after transplantation. However, functionally blocking the OX40/OX40L pathway with anti-OX40L mAb significantly prevented CAV development and reduced the Tmem cell population in recipient mice. Anti-OX40L mAb therapy also significantly decreased cellular infiltration and cytokine (IFN-γ, TNF-α and TGF-β) expression in heart allografts. CONCLUSIONS Tmem cells mediate CAV in heart transplants. Functionally blocking the OX40/OX40L pathway using anti-OX40L mAb therapy prevents Tmem cell-mediated CAV, suggesting therapeutic potential for disrupting OX40-OX40L signaling in order to prevent CAV in heart transplant patients.
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Affiliation(s)
- Hao Wang
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin General Surgery Institute, Tianjin, China,
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4
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Gong W, Ge F, Liu D, Wu Y, Liu F, Kim BS, Huang T, Koulmanda M, Robson SC, Strom TB. Role of myeloid-derived suppressor cells in mouse pre-sensitized cardiac transplant model. Clin Immunol 2014; 153:8-16. [PMID: 24691417 DOI: 10.1016/j.clim.2014.03.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2014] [Revised: 02/24/2014] [Accepted: 03/17/2014] [Indexed: 01/19/2023]
Abstract
Harness of sensitized transplantation remains a clinical challenge particularly in parallel with prolonged cold ischemia time (PCI)-mediated injury. Our present study was to test the role of myeloid-derived suppressor cells (MDSCs) in mouse pre-sensitized transplantation. Our findings revealed that CD11b+Gr1(low) MDSC was shown to have strong suppressive activity. MDSCs subsets from the tolerated mice exhibited higher suppressive capacities compared with counterparts from naive (untreated) mice. Depletion of Tregs could not affect splenic CD11b+Gr1(-low) MDSC frequency, but increase peripheral and intragraft CD11b+Gr1(-low) frequency. Intriguingly, boost of Tregs remarkably caused an increase of CD11b+Gr1(-low) frequency in the graft, peripheral blood, and spleen. Furthermore, peripheral CD11b+Gr1(-low) cells were massively accumulated at the early stage when allogeneic immune response was enhanced. Taken together, MDSCs could prevent grafts from PCI-mediated injury independent on Tregs in the pre-sensitized transplant recipients. Utilization of MDSC subset particularly CD11b+Gr1(-low) might provide a novel insight into improving graft outcome under such clinical scenarios.
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Affiliation(s)
- Weihua Gong
- Department of Surgery and Medicine, Transplant International Research Centre (TIRC), Second Affiliated Hospital of School of Medicine, Zhejiang University, Hangzhou City, People's Republic of China; Departments of Medicine, Transplant Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.
| | - Fangmin Ge
- Department of Surgery and Medicine, Transplant International Research Centre (TIRC), Second Affiliated Hospital of School of Medicine, Zhejiang University, Hangzhou City, People's Republic of China
| | - Dahai Liu
- Center for Stem Cell and Translational Medicine, School of Life Sciences, Anhui University, Hefei City, People's Republic of China
| | - Yan Wu
- Departments of Medicine, Transplant Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Fangbing Liu
- Department of Hemotology/Oncology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Beom Seok Kim
- Department of Internal Medicine, College of Medicine, Yonsei University, Seoul, Korea
| | - Tao Huang
- Departments of Medicine, Transplant Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Maria Koulmanda
- Departments of Medicine, Transplant Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Simon C Robson
- Departments of Medicine, Transplant Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.
| | - Terry B Strom
- Departments of Medicine, Transplant Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
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5
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Presensitized Immune Condition of Host Exaggerates Prolonged Cold Ischemia-Mediated Injury of Cardiac Graft Involving Regulatory T Cells. Transplantation 2013; 96:609-15. [DOI: 10.1097/tp.0b013e31829df26d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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6
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Priyadharshini B, Greiner DL, Brehm MA. T-cell activation and transplantation tolerance. Transplant Rev (Orlando) 2012; 26:212-22. [PMID: 22074786 PMCID: PMC3294261 DOI: 10.1016/j.trre.2011.09.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2011] [Revised: 08/16/2011] [Accepted: 09/02/2011] [Indexed: 12/28/2022]
Abstract
Transplantation of allogeneic or "nonself" tissues stimulates a robust immune response leading to graft rejection, and therefore, most recipients of allogeneic organ transplants require the lifelong use of immune suppressive agents. Excellent outcomes notwithstanding, contemporary immunosuppressive medications are toxic, are often not taken by patients, and pose long-term risks of infection and malignancy. The ultimate goal in transplantation is to develop new treatments that will supplant the need for general immunosuppression. Here, we will describe the development and application of costimulation blockade to induce transplantation tolerance and discuss how the diverse array of signals that act on T cells will determine the balance between graft survival and rejection.
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Affiliation(s)
- Bhavana Priyadharshini
- Program in Molecular Medicine, University of Massachusetts Medical School, 373 Plantation Street, Biotech 2, Worcester, MA 01605
| | - Dale L. Greiner
- Program in Molecular Medicine, University of Massachusetts Medical School, 373 Plantation Street, Biotech 2, Worcester, MA 01605
| | - Michael A. Brehm
- Program in Molecular Medicine, University of Massachusetts Medical School, 373 Plantation Street, Biotech 2, Worcester, MA 01605
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7
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Shariff H, Greenlaw RE, Meader L, Gardner N, Yagita H, Coccia M, Mamode N, Jurcevic S. Role of the Fc region in CD70-specific antibody effects on cardiac transplant survival. Transplantation 2011; 92:1194-201. [PMID: 22089665 DOI: 10.1097/tp.0b013e3182347ecd] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND The role of the CD70-specific antibody and the mechanisms by which it extends transplant survival are not known. METHODS Fully major histocompatibility complex-mismatched heterotopic heart transplantation (BALB/c to C57BL/6) was performed. Treated mice received intraperitoneal injections of wild-type (WT) CD70-specific antibody (FR70) or IgG1 or IgG2a chimeric antibodies on days 0, 2, 4, and 6 posttransplantation. RESULTS WT FR70 antibody significantly extended heart transplant survival to 19 days compared with untreated mice (median survival time [MST]=10 days). Graft survival using the nondepleting IgG1 antibody was significantly shorter (MST=14 days), whereas the survival using depleting IgG2a antibody (MST=18) was similar to that using WT FR70. The FR70 and IgG2a antibodies demonstrated a greater efficiency of fixing mouse complement over the IgG1 variant in vitro. CD4 and CD8 T-cell graft infiltration was reduced with treatment; however, this was most pronounced with WT FR70 and IgG2a antibody therapy compared with the IgG1 chimeric variant. Circulating donor-specific IgG alloantibodies were initially reduced with WT FR70 treatment (day 8 posttransplantation) but increased at days 15 and 20 posttransplantation to the level detected in untreated controls. CONCLUSION We conclude that WT (FR70) and the IgG2a depleting variant of CD70-specific antibody reduce graft infiltrating CD4 and CD8 T cells, transiently reduce serum alloantibody levels, and extend graft survival. In contrast, the nondepleting IgG1 variant of this antibody showed lower efficacy. These data suggest that a depleting mechanism of action and not merely costimulation blockade plays a substantial role in the therapeutic effects of CD70-specific antibody.
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Affiliation(s)
- Hina Shariff
- Division of Transplantation Immunology and Mucosal Biology, King's College London, Guy's Hospital, London, UK
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8
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Dodd-o JM, Lendermon EA, Miller HL, Zhong Q, John ER, Jungraithmayr WM, D'Alessio FR, McDyer JF. CD154 blockade abrogates allospecific responses and enhances CD4(+) regulatory T-cells in mouse orthotopic lung transplant. Am J Transplant 2011; 11:1815-24. [PMID: 21827610 PMCID: PMC3827913 DOI: 10.1111/j.1600-6143.2011.03623.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Acute cellular rejection (ACR) is a common and important clinical complication following lung transplantation. While there is a clinical need for the development of novel therapies to prevent ACR, the regulation of allospecific effector T-cells in this process remains incompletely understood. Using the MHC-mismatched mouse orthotopic lung transplant model, we investigated the short-term role of anti-CD154 mAb therapy alone on allograft pathology and alloimmune T-cell effector responses. Untreated C57BL/6 recipients of BALB/c left lung allografts had high-grade rejection and diminished CD4(+) : CD8(+) graft ratios, marked by predominantly CD8(+) >CD4(+) IFN-γ(+) allospecific effector responses at day 10, compared to isograft controls. Anti-CD154 mAb therapy strikingly abrogated both CD8(+) and CD4(+) alloeffector responses and significantly increased lung allograft CD4(+) : CD8(+) ratios. Examination of graft CD4(+) T-cells revealed significantly increased frequencies of CD4(+) CD25(+) Foxp3(+) regulatory T-cells in the lung allografts of anti-CD154-treated mice and was associated with significant attenuation of ACR compared to untreated controls. Together, these data show that CD154/CD40 costimulation blockade alone is sufficient to abrogate allospecific effector T-cell responses and significantly shifts the lung allograft toward an environment predominated by CD4(+) T regulatory cells in association with an attenuation of ACR.
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Affiliation(s)
- J M Dodd-o
- Department of Anesthesiology, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
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9
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Ji H, Shen XD, Gao F, Busuttil RW, Zhai Y, Kupiec-Weglinski JW. Alloreactive CD8 T-cell primed/memory responses and accelerated graft rejection in B-cell-deficient sensitized mice. Transplantation 2011; 91:1075-81. [PMID: 21427633 PMCID: PMC3593653 DOI: 10.1097/tp.0b013e31821578da] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
BACKGROUND The sensitized patients can develop an accelerated form of graft rejection mediated by humoral and T-cell-mediated responses, which are resistant to currently used immunosuppression. METHODS AND RESULTS In our model of fulminant cardiac allograft rejection in sensitized hosts, groups of wild-type (WT) and B-cell-deficient (BKO) mice (B6) were challenged with skin grafts (B/c). Alloreactive CD8 T effector (Teff) activation and T memory (Tmem) differentiation during a 60-day follow-up period were reduced in the absence of B-cell help. The expression of interleukin (IL)-2Rα, IL-7Rα, and IL-15Rα, which support/program CD8 Teff/Tmem expansion, differentiation, and survival, were selectively decreased in BKO hosts. Unlike in WT, in vivo cytotoxic activity analysis of alloreactive Tmem recall response has revealed decreased donor-type (B/c) but not third-party (C3H) cell lysis in sensitized BKO hosts. However, such impaired allo-Ag specific Tmem recall function was insufficient to markedly prolong cardiac allograft survival in sensitized BKO recipients. Indeed, despite quantitative and statistically significant differences between both animal groups, the biological impact of decreased CD8 Teff/Tmem activation and function in the sensitization phase was marginal. Indeed, cardiac allografts underwent fulminant rejection in sensitized BKO, albeit with somewhat delayed kinetics. Interestingly, unlike in naïve counterparts, the rejection cascade remained CD154 blockade-resistant, evidenced by comparable kinetics, and intra-graft cytokine gene profiles in MR1 monoclonal antibody-treated sensitized WT and BKO hosts. CONCLUSION Although B cells were important for optimal alloreactive CD8 Teff/Tmem function in the sensitization phase, the fulminant rejection of cardiac allografts was B-cell-independent, and CD154 blockade-resistant, as in WT hosts.
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Affiliation(s)
- Haofeng Ji
- Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Xiu-da Shen
- Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Feng Gao
- Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Ronald W. Busuttil
- Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Yuan Zhai
- Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Jerzy W. Kupiec-Weglinski
- Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
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10
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Intermittent antibody-based combination therapy removes alloantibodies and achieves indefinite heart transplant survival in presensitized recipients. Transplantation 2010; 90:270-8. [PMID: 20571468 DOI: 10.1097/tp.0b013e3181e228bd] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND It is well established that primed/memory T cells play a critical role in heart transplant rejection. This contributes to the challenges faced in the transplant clinic because current treatments that are efficient in controlling naïve T cell alloresponses have limited efficacy on primed T cell responders. METHODS Fully MHC-mismatched heart transplantation was performed from BALB/c to C57BL/6 mice presensitized with BALB/c splenocytes 14 days pretransplantation. A combination therapy comprising CD70-, CD154-, and CD8-specific antibodies (Abs) was administered at day 0 and 4 posttransplantation with rapamycin on days 0 to 4. RESULTS The Ab combination therapy extended heart transplant survival in presensitized recipients from median survival time 8 days (MST) to MST 78 days. A decrease in the number of splenic interferon-gamma-secreting cells measured by ELISpot assay was seen in the treated group compared with the untreated controls. However, graft-infiltrating CD8+ and CD4+ T cells persisted despite treatment and the number of intragraft CD4+ T cells increased at day 30 posttransplantation. When an additional "rescue therapy" comprising the same Abs was readministered at days 30, 60, and 90 posttransplantation, T cell infiltration was reduced and indefinite graft survival was observed. Furthermore, rescue therapy resulted in gradual decrease in titer and, by day 90 posttransplantation, the complete loss of the preexisting, donor-specific Abs. CONCLUSION We conclude that our Ab combination therapy extends allograft survival in presensitized recipients. When combined with intermittent Ab-mediated rescue therapy, this results in indefinite allograft survival and a loss of the preexisting, donor-specific Abs from the circulation.
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11
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Interferon gamma licensing of human dendritic cells in T-helper-independent CD8+ alloimmunity. Blood 2010; 116:3089-98. [PMID: 20644110 DOI: 10.1182/blood-2010-02-268623] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The high frequency of allogeneic reactive CD8(+) T cells in human and their resistance to immunosuppression might be one of the reasons why successful tolerance-inducing strategies in rodents have failed in primates. Studies on the requirement for T-helper cells in priming CD8(+) T-cell responses have led to disparate findings. Recent studies have reported CD8(+)-mediated allograft rejection independently of T-helper cells; however, the mechanisms that govern the activation of these T cells are far from being elucidated. In this study, we demonstrated that lipopolysaccharide-treated dendritic cells (DCs) were able to induce proliferation and cytotoxic activity of allogeneic CD8(+) T cells independently of CD4(+) T cells, while adding mycophenolic acid (MPA) to LPS abolished this capacity and resulted in anergic CD8(+) T cells that secreted high levels of interleukin-4 (IL-4), IL-5, IL-10, and transforming growth factor-β. Interestingly, we demonstrated that MPA inhibited the LPS-induced synthesis of tumor necrosis factor-α, IL-12, and interferon-γ (IFN-γ) in DCs. Importantly, we found that adding exogenous IFN-γ to MPA restored both the synthesis of cytokines and the ability to activate CD8(+) T cells. However, adding IL-12 or tumor necrosis factor-α had no effect. These results suggest that IFN-γ has an important role in licensing DCs to prime CD4-independent CD8 allogeneic T cells via an autocrine loop.
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12
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Yamaura K, Boenisch O, Watanabe T, Ueno T, Vanguri V, Yang J, Tanaka K, Guleria I, Borst J, Zhai Y, Kupiec-Weglinski JW, Najafian N. Differential requirement of CD27 costimulatory signaling for naïve versus alloantigen-primed effector/memory CD8+ T cells. Am J Transplant 2010; 10:1210-20. [PMID: 20353477 PMCID: PMC2889922 DOI: 10.1111/j.1600-6143.2010.03089.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
CD8(+) memory T cells endanger allograft survival by causing acute and chronic rejection and prevent tolerance induction. We explored the role of CD27:CD70 T-cell costimulatory pathway in alloreactive CD8(+)/CD4(+) T-cell activation. CD27-deficient (CD27(-/-)) and wild-type (WT) B6 mice rejected BALB/c cardiac allografts at similar tempo, with or without depletion of CD4(+) or CD8(+) T cells, suggesting that CD27 is not essential during primary T-cell alloimmune responses. To dissect the role of CD27 in primed effector and memory alloreactive T cells, CD27(-/-) or WT mice were challenged with BALB/c hearts either 10 or 40 days after sensitization with donor-type skin grafts. Compared to WT controls, allograft survival was prolonged in day 40- but not day 10-sensitized CD27(-/-) recipients. Improved allograft survival was accompanied by diminished secondary responsiveness of memory CD8(+) T cells, which resulted from deficiency in memory formation rather than their lack of secondary expansion. Chronic allograft vasculopathy and fibrosis were diminished in CD27(-/-) recipients of class I- but not class II-mismatched hearts as compared to WT controls. These data establish a novel role for CD27 as an important costimulatory molecule for alloreactive CD8(+) memory T cells in acute and chronic allograft rejection.
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Affiliation(s)
- K. Yamaura
- Transplantation Research Center, Brigham and Women’s Hospital and Children’s Hospital, Harvard Medical School, Boston, MA
| | - O. Boenisch
- Transplantation Research Center, Brigham and Women’s Hospital and Children’s Hospital, Harvard Medical School, Boston, MA
| | - T. Watanabe
- Transplantation Research Center, Brigham and Women’s Hospital and Children’s Hospital, Harvard Medical School, Boston, MA
| | - T. Ueno
- Transplantation Research Center, Brigham and Women’s Hospital and Children’s Hospital, Harvard Medical School, Boston, MA
| | - V. Vanguri
- Immunology Research Division, Department of Pathology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - J. Yang
- Transplantation Research Center, Brigham and Women’s Hospital and Children’s Hospital, Harvard Medical School, Boston, MA
| | - K. Tanaka
- Transplantation Research Center, Brigham and Women’s Hospital and Children’s Hospital, Harvard Medical School, Boston, MA
| | - I. Guleria
- Transplantation Research Center, Brigham and Women’s Hospital and Children’s Hospital, Harvard Medical School, Boston, MA
| | - J. Borst
- Division of Immunology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Y. Zhai
- Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - J. W. Kupiec-Weglinski
- Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - N. Najafian
- Transplantation Research Center, Brigham and Women’s Hospital and Children’s Hospital, Harvard Medical School, Boston, MA,Corresponding author: Nader Najafian,
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Shah PD, West EE, Whitlock AB, Orens JB, McDyer JF. CD154 deficiency uncouples allograft CD8+ T-cell effector function from proliferation and inhibits murine airway obliteration. Am J Transplant 2009; 9:2697-706. [PMID: 20021479 PMCID: PMC3827910 DOI: 10.1111/j.1600-6143.2009.02805.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Obliterative bronchiolitis (OB) limits the long-term success of lung transplantation, while T-cell effector mechanisms in this process remain incompletely understood. Using the murine heterotopic tracheal transplant model of obliterative airway disease (OAD) to characterize airway allograft rejection, we previously reported an important role for CD8(+) T cells in OAD. Herein, we studied the role of CD154/CD40 costimulation in the regulation of allospecific CD8(+) T cells, as airway rejection has been reported to be CD154-dependent. Airway allografts from CD154(-/-) recipients had significantly lower day 28 OAD scores compared to wild-type (WT) recipients, and adoptive transfer of CD8(+) T cells from WT recipients, but not CD154(-/-) recipients, were capable of airway rejection in fresh CD154(-/-) allograft recipients. Intragraft CD8(+) T cells from CD154(-/-) mice showed similar expression of the surface markers CD69, CD62L(low) CD44(high) and PD-1, but markedly impaired IFN-gamma and TNF-alpha secretion and granzyme B expression versus WT controls. Unexpectedly, intragraft and systemic CD8(+) T cells from CD154(-/-) recipients demonstrated robust in vivo expansion similar to WT recipients, consistent with an uncoupling of proliferation from effector function. Together, these data suggest that a lack of CD154/CD40 costimulation results in ineffective allospecific priming of CD8(+) T cells required for murine OAD.
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