1
|
Lellouch AG, Andrews AR, Saviane G, Ng ZY, Schol IM, Goutard M, Gama AR, Rosales IA, Colvin RB, Lantieri LA, Randolph MA, Benichou G, Cetrulo CL. Tolerance of a Vascularized Composite Allograft Achieved in MHC Class-I-mismatch Swine via Mixed Chimerism. Front Immunol 2022; 13:829406. [PMID: 35619720 PMCID: PMC9128064 DOI: 10.3389/fimmu.2022.829406] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Accepted: 04/15/2022] [Indexed: 11/26/2022] Open
Abstract
Background Vascularized composite allografts (VCAs) allow reconstruction of devastating injuries and amputations, yet require lifelong immunosuppression that is associated with significant morbidity. Induction of immune tolerance of VCAs would permit widespread use of these procedures. VCAs are acquired from deceased donors most likely to be fully-MHC-mismatched (in contrast to living-related renal transplant donor-recipient pairs matched at one MHC haplotype). After achieving VCA tolerance in a swine model equivalent to clinical living-related renal transplants (single-haplotype MHC mismatches: e.g., “mother-daughter”/haploidentical), we tested our protocol in MHC class I, class II, and fully-MHC-mismatched pairs. Although class II mismatched swine demonstrated similar results as the haploidentical scenario (stable mixed chimerism and tolerance), our protocol failed to prevent rejection of class I and full mismatch VCAs. Here, we describe a new adapted conditioning protocol that successfully achieved tolerance across MHC class-I-mismatch barriers in swine. Methods Swine were treated with non-myeloablative total body and thymic irradiation two days prior to infusion of bone marrow cells from an MHC class I-mismatched donor. They also received a short-term treatment with CTLA4-Ig (Belatacept®) and anti-IL6R mAb (Tociluzimab®) and were transplanted with an osteomyocutaneous VCA from the same donor. Results Stable mixed chimerism and tolerance of MHC class-I-mismatched VCAs was achieved in 3 recipients. Allograft tolerance was associated with a sustained lack of anti-donor T cell response and a concomitant expansion of double negative CD4-CD8- T cells producing IL-10. Conclusions This study demonstrates the first successful mixed chimerism-induced VCA tolerance in a large animal model across a MHC class-I-mismatch. Future studies aimed at fully-mismatched donor-recipient pairs are under investigation with this protocol.
Collapse
Affiliation(s)
- Alexandre G Lellouch
- Division of Plastic and Reconstructive Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.,Vascularized Composite Allotransplantation Laboratory, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.,Service de Chirurgie Plastique, Hôpital Européen Georges Pompidou, Assistance Publique-Hôpitaux de Paris (APHP), Université Paris Descartes, Paris, France.,Shriners Hospitals for Children, Harvard Medical School, Boston, MA, United States
| | - Alec R Andrews
- Division of Plastic and Reconstructive Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.,Vascularized Composite Allotransplantation Laboratory, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.,Shriners Hospitals for Children, Harvard Medical School, Boston, MA, United States
| | - Gaelle Saviane
- Vascularized Composite Allotransplantation Laboratory, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.,Shriners Hospitals for Children, Harvard Medical School, Boston, MA, United States.,Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Zhi Yang Ng
- Division of Plastic and Reconstructive Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.,Vascularized Composite Allotransplantation Laboratory, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Ilse M Schol
- Division of Plastic and Reconstructive Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.,Vascularized Composite Allotransplantation Laboratory, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Marion Goutard
- Division of Plastic and Reconstructive Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.,Vascularized Composite Allotransplantation Laboratory, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.,Service de Chirurgie Plastique, Hôpital Européen Georges Pompidou, Assistance Publique-Hôpitaux de Paris (APHP), Université Paris Descartes, Paris, France.,Shriners Hospitals for Children, Harvard Medical School, Boston, MA, United States
| | - Amon-Ra Gama
- Vascularized Composite Allotransplantation Laboratory, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Ivy A Rosales
- Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Robert B Colvin
- Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Laurent A Lantieri
- Service de Chirurgie Plastique, Hôpital Européen Georges Pompidou, Assistance Publique-Hôpitaux de Paris (APHP), Université Paris Descartes, Paris, France
| | - Mark A Randolph
- Division of Plastic and Reconstructive Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.,Vascularized Composite Allotransplantation Laboratory, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.,Shriners Hospitals for Children, Harvard Medical School, Boston, MA, United States
| | - Gilles Benichou
- Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Curtis L Cetrulo
- Division of Plastic and Reconstructive Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.,Vascularized Composite Allotransplantation Laboratory, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.,Shriners Hospitals for Children, Harvard Medical School, Boston, MA, United States.,Center for Transplantation Sciences, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| |
Collapse
|
2
|
Shi Y, Lu Y, Zhu C, Luo Z, Li X, Liu Y, Jiang M, Liu X, Luo L, Du Y, You J. Targeted regulation of lymphocytic ER stress response with an overall immunosuppression to alleviate allograft rejection. Biomaterials 2021; 272:120757. [PMID: 33798960 DOI: 10.1016/j.biomaterials.2021.120757] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 03/05/2021] [Accepted: 03/12/2021] [Indexed: 12/20/2022]
Abstract
Transplantation is the most effective, and sometimes the only resort for end-stage organ failure. However, allogeneic graft suffers greatly from lymphocyte-mediated immunorejection, which bears close relationship with a hyperactivation of endoplasmic reticulum (ER) stress response in host lymphocytes, especially in CD8+ T cells (T-8). Therefore, regulating lymphocytic ER unfolded protein response (UPR) might be a potential therapeutic breakthrough in alleviating graft rejection. Here, ER-targetable liposome is prepared via the surface modification of ER-targeting peptide (Pardaxin), which efficiently loads and directly delivers small molecule inhibitor of UPR sensor IRE1α into the ER of lymphocytes, inducing a systemic immunosuppression that facilitates tumorigenesis and metastasis in the tumor inoculation challenge in vivo. And in vitro, a stage-differential dependency of IRE1α in the phase transition of T-8 is identified. Specifically, inhibiting IRE1α at the early responding stages of T-8, especially at the activation phase, results in a shrunk proliferation, impaired effector function, and limited memory commitment, which might contribute centrally to the induced overall immunosuppression. Based on this, a classical acute rejection model, murine full-thickness trunk skin allograft that primary arises from the hyperactivity of T-lymphocyte, is used. Results suggest that lymphocytic IRE1α inactivation attenuates transplant rejection and prolongs graft survival, with a limited effector function and memory commitment of host T-8. Moreover, an even higher immunosuppressive effect is obtained when IRE1α inhibition is used in combination with immunosuppressant tacrolimus (FK506), which might owe to a synergistic regulation of inflammatory transcription factors. These findings provide a deeper insight into the biological polarization and stress response of lymphocytes, which might guide the future development of allogeneic transplantation.
Collapse
Affiliation(s)
- Yingying Shi
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, PR China
| | - Yichao Lu
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, PR China
| | - Chunqi Zhu
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, PR China
| | - Zhenyu Luo
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, PR China
| | - Xiang Li
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, PR China
| | - Yu Liu
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, PR China
| | - Mengshi Jiang
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, PR China
| | - Xu Liu
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, PR China
| | - Lihua Luo
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, PR China
| | - Yongzhong Du
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, PR China
| | - Jian You
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, PR China.
| |
Collapse
|
3
|
Clinical Trial of Allogeneic Mesenchymal Stem Cell Therapy for Chronic Active Antibody-Mediated Rejection in Kidney Transplant Recipients Unresponsive to Rituximab and Intravenous Immunoglobulin. Stem Cells Int 2021; 2021:6672644. [PMID: 33628269 PMCID: PMC7892211 DOI: 10.1155/2021/6672644] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 12/31/2020] [Accepted: 01/27/2021] [Indexed: 12/25/2022] Open
Abstract
Clinical trials of biologic agents for chronic active antibody-mediated rejection (CAMR) in kidney transplant recipients (KTRs) have been disappointing. We performed a clinical trial of mesenchymal stem cell (MSC) treatment in KTRs with CAMR unresponsive to rituximab and intravenous immunoglobulin. This study was a phase 1 clinical trial to confirm patient safety. Two patients with CAMR unresponsive to rituximab and intravenous immunoglobulin were included. Each patient received allogeneic MSCs for 4 cycles (1 × 106 cells/kg every other week) via the peripheral vein in the distal arm. We observed adverse events and renal function for 6 months after the final MSC infusion and analyzed changes in immunomodulatory parameters in the peripheral blood between the start of treatment and 3 months after the final MSC infusion. There were no serious adverse events during the study period. Renal function was stable during MSC treatment but gradually decreased between the final MSC infusion and the study endpoint (patient 1: creatinine levels ranged from 3.01 mg/dL to 7.81 mg/dL, patient 2: 2.87 mg/dL to 3.91 mg/dL). In peripheral blood sample analysis between the start of treatment and 3 months after the final MSC infusion, there were similar trends for immunomodulatory markers. Our study showed that there were no serious adverse events for six months after allogeneic MSC treatment in KTRs with CAMR refractory to rituximab and intravenous immunoglobulin, but further studies need to define the efficacy of MSC treatment in CAMR.
Collapse
|
4
|
Lai X, Yao Z, Ning F, Zhang L, Fang J, Li G, Xu L, Xiong Y, Liu L, Chen R, Ma J, Chen Z. Blockade of OX40/OX40L pathway combined with ethylene-carbodiimide-fixed donor splenocytes induces donor-specific allograft tolerance in presensitized recipients. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:84. [PMID: 32175377 DOI: 10.21037/atm.2019.12.146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Background Memory T cells (Tms) are the major barrier preventing long-term allograft survival in presensitized transplant recipients. The OX40/OX40L pathway is important in the induction and maintenance of Tms. Methods In this study, we added anti-OX40L mAb to ethylene-carbodiimide-fixed donor splenocytes (ECDI-SPs)-a method which is effective in inducing allograft tolerance in non-presensitized mouse heart transplant model. Recipient mice received heart transplantation after 6 weeks of donor skin presensitization and were treated with anti-OX40L mAb, ECDI-SPs or anti-OX40L mAb + ECDI-SPs, respectively. Results Our data showed that the combination of ECDI-SPs and anti-OX40L mAb induced donor-specific tolerance in skin-presensitized heart transplant recipients, with the mechanism for this being associated with suppression of Tms and upregulation of CD4+CD25+Foxp3+ T regulatory cells (Tregs). Importantly, CD25+ T-cell depletion in the combined therapy-treated recipients broke the establishment of allograft tolerance, whereas adoptive transfer of presensitization-derived T cells into tolerant recipients suppressed Tregs expansion and abolished established tolerance. Conclusions Blockade of OX40/OX40L pathway in combination with ECDI-SPs appears to modulate the Tms/Tregs imbalance so as to create a protective milieu and induce graft tolerance in presensitized recipients.
Collapse
Affiliation(s)
- Xingqiang Lai
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, China
| | - Zhongpeng Yao
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, China
| | - Fen Ning
- Guangzhou Institute of Pediatrics, Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, China
| | - Lei Zhang
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, China
| | - Jiali Fang
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, China
| | - Guanghui Li
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, China
| | - Lu Xu
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, China
| | - Yunyi Xiong
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, China
| | - Luhao Liu
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, China
| | - Rongxin Chen
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, China
| | - Junjie Ma
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, China
| | - Zheng Chen
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, China
| |
Collapse
|
5
|
Resilience of T cell-intrinsic dysfunction in transplantation tolerance. Proc Natl Acad Sci U S A 2019; 116:23682-23690. [PMID: 31685610 DOI: 10.1073/pnas.1910298116] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Following antigen stimulation, naïve T cells differentiate into memory cells that mediate antigen clearance more efficiently upon repeat encounter. Donor-specific tolerance can be achieved in a subset of transplant recipients, but some of these grafts are rejected after years of stability, often following infections. Whether T cell memory can develop from a tolerant state and whether these formerly tolerant patients develop antidonor memory is not known. Using a mouse model of cardiac transplantation in which donor-specific tolerance is induced with costimulation blockade (CoB) plus donor-specific transfusion (DST), we have previously shown that systemic infection with Listeria monocytogenes (Lm) months after transplantation can erode or transiently abrogate established tolerance. In this study, we tracked donor-reactive T cells to investigate whether memory can be induced when alloreactive T cells are activated in the setting of tolerance. We show alloreactive T cells persist after induction of cardiac transplantation tolerance, but fail to acquire a memory phenotype despite becoming antigen experienced. Instead, donor-reactive T cells develop T cell-intrinsic dysfunction evidenced when removed from the tolerant environment. Notably, Lm infection after tolerance did not rescue alloreactive T cell memory differentiation or functionality. CoB and antigen persistence were sufficient together but not separately to achieve alloreactive T cell dysfunction, and conventional immunosuppression could substitute for CoB. Antigen persistence was required, as early but not late surgical allograft removal precluded the acquisition of T cell dysfunction. Our results demonstrate transplant tolerance-associated T cell-intrinsic dysfunction that is resistant to memory development even after Lm-mediated disruption of tolerance.
Collapse
|
6
|
Marui T, Fukahori H, Ito M, Kaneko Y, Maeda M, Tsujimoto S, Morokata T. The PI3Kδ selective inhibitor AS2541019 suppresses donor-specific antibody production in rat cardiac and non-human primate renal allotransplant models. Int Immunopharmacol 2019; 75:105756. [PMID: 31344556 DOI: 10.1016/j.intimp.2019.105756] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 07/01/2019] [Accepted: 07/10/2019] [Indexed: 12/12/2022]
Abstract
Long-term graft survival after organ transplantation is difficult to achieve because of the development of chronic rejection. One cause of chronic rejection arises from antibody-mediated rejection (AMR), which is dependent on the production of donor-specific antibodies (DSA). Current immunosuppression in organ transplantation is effective in preventing acute T cell-mediated rejection, but the risk of DSA production and graft loss due to AMR remains unchanged. Phosphatidylinositol-3-kinase p110δ (PI3Kδ), a member of the family of PI3K lipid kinases, is a key mediator of B cell activation, proliferation and antibody production. AS2541019 is a novel PI3Kδ selective inhibitor that prevents antibody production by inhibiting B cell immunity. The purpose of this study was to evaluate the inhibitory effect of AS2541019 on DSA production in preclinical rodent and non-human primate allotransplant models. Concomitant administration of AS2541019 with tacrolimus and mycophenolate mofetil (MMF) inhibited de novo DSA production in an ACI-to-Lewis rat cardiac allotransplant model. To predict the efficacy of AS2541019 in clinical practice, we evaluated its effects in cynomolgus monkeys. AS2541019 inhibited B cell proliferation and major histocompatibility complex (MHC) class II expression on B cells in cynomolgus monkeys. Oral administration of AS2541019 inhibited MHC class II expression on peripheral B cells and anti-tetanus toxoid antibody production. In cynomolgus monkey renal allotransplant model, concomitant administration of AS2541019 with tacrolimus and MMF significantly inhibited de novo DSA production. Together, our findings indicate that the PI3Kδ selective inhibitor AS2541019 is a potential candidate for preventing AMR development by inhibiting DSA production.
Collapse
Affiliation(s)
- Takanori Marui
- Drug Discovery Research, Astellas Pharma Inc., 21, Miyukigaoka, Tsukuba-shi, Ibaraki 305-8585, Japan.
| | - Hidehiko Fukahori
- Drug Discovery Research, Astellas Pharma Inc., 21, Miyukigaoka, Tsukuba-shi, Ibaraki 305-8585, Japan
| | - Misato Ito
- Drug Discovery Research, Astellas Pharma Inc., 21, Miyukigaoka, Tsukuba-shi, Ibaraki 305-8585, Japan
| | - Yoko Kaneko
- Drug Discovery Research, Astellas Pharma Inc., 21, Miyukigaoka, Tsukuba-shi, Ibaraki 305-8585, Japan
| | - Masashi Maeda
- Drug Discovery Research, Astellas Pharma Inc., 21, Miyukigaoka, Tsukuba-shi, Ibaraki 305-8585, Japan
| | - Susumu Tsujimoto
- Drug Discovery Research, Astellas Pharma Inc., 21, Miyukigaoka, Tsukuba-shi, Ibaraki 305-8585, Japan
| | - Tatsuaki Morokata
- Drug Discovery Research, Astellas Pharma Inc., 21, Miyukigaoka, Tsukuba-shi, Ibaraki 305-8585, Japan
| |
Collapse
|
7
|
IL-17A Is Critical for CD8+ T Effector Response in Airway Epithelial Injury After Transplantation. Transplantation 2019; 102:e483-e493. [PMID: 30211827 DOI: 10.1097/tp.0000000000002452] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND Airway epithelium is the primary target of trachea and lung transplant rejection, the degree of epithelial injury is closely correlated with obliterative bronchiolitis development. In this study, we investigated the cellular and molecular mechanisms of IL-17A-mediated airway epithelial injury after transplantation. METHODS Murine orthotopic allogeneic trachea or lung transplants were implemented in wild type or RORγt mice. Recipients received anti-IL-17A or anti-IFNγ for cytokine neutralization, anti-CD8 for CD8 T-cell depletion, or STAT3 inhibitor to suppress type 17 CD4+/CD8+ T cell development. Airway injury and graft inflammatory cell infiltration were examined by histopathology and immunohistochemistry. Gene expression of IL-17A, IFNγ, perforin, granzyme B, and chemokines in grafts was quantitated by real-time RT-PCR. RESULTS IL-17A and IFNγ were rapidly expressed and associated with epithelial injury and CD8 T-cell accumulation after allotransplantation. Depletion of CD8 T cells prevented airway epithelial injury. Neutralization of IL-17A or devoid of IL-17A production by RORγt deficiency improved airway epithelial integrity of the trachea allografts. Anti-IL-17A reduced the expression of CXCL9, CXCL10, CXCL11, and CCL20, and abolished CD8 T-cell accumulation in the trachea allografts. Inhibition of STAT3 activation significantly reduced IL-17A expression in both trachea and lung allografts; however, it increased IFNγ expression and cytotoxic activities, which resulted in the failure of airway protection. CONCLUSIONS Our data reveal the critical role of IL-17A in mediating CD8 T effector response that causes airway epithelial injury and lung allograft rejection, and indicate that inhibition of STAT3 signals could drive CD8 T cells from Tc17 toward Tc1 development.
Collapse
|
8
|
Notch inhibition enhances graft-versus-leukemia while reducing graft-versus-host disease. Eur J Pharmacol 2018; 843:226-232. [PMID: 30445020 DOI: 10.1016/j.ejphar.2018.10.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 09/27/2018] [Accepted: 10/09/2018] [Indexed: 12/31/2022]
Abstract
Graft-versus host disease (GVHD) remains the most significant complication of allogeneic hematopoietic stem cell transplantation (allo-HSCT). Dissociation of graft versus-leukemia (GVL) activity from GVHD has yet to be achieved. In this study, we used γ-secretase inhibitor (GSIs, DAPT) to inhibit Notch signaling in GVHD and GVL murine model. We found that CD11c+CD80+ dendritic cells (DCs) were up-regulated but did not enhance GVHD. Regulatory T cells (Tregs) and central memory T cells that express high levels of CD62L and CD44 had an expansion after Notch inhibition. Reduced Tumor Necrosis Factor-α and increased Interferon-γ production were found, which might be ascribed to the expansion of Tregs and central memory T cells, and result in increased sensitivity of tumor cells to cytotoxic T lymphocyte activity. Fas Receptor-Fas Ligand interaction plays a critical role in GVL instead of aGVHD. Fas Ligand expressions were similar in recipients with or without Notch inhibition, suggesting that GVL activity was maintained. We showed that Notch inhibition could enhances GVL while reducing GVHD via modulating host DCs and donor T cell activity, and the production of inflammatory cytokines.
Collapse
|
9
|
Meurer T, Arrieta-Bolaños E, Metzing M, Langer MM, van Balen P, Falkenburg JHF, Beelen DW, Horn PA, Fleischhauer K, Crivello P. Dissecting Genetic Control of HLA-DPB1 Expression and Its Relation to Structural Mismatch Models in Hematopoietic Stem Cell Transplantation. Front Immunol 2018; 9:2236. [PMID: 30344521 PMCID: PMC6183238 DOI: 10.3389/fimmu.2018.02236] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 09/10/2018] [Indexed: 11/22/2022] Open
Abstract
HLA expression levels have been suggested to be genetically controlled by single nucleotide polymorphisms (SNP) in the untranslated regions (UTR), and expression variants have been associated with the outcome of chronic viral infection and hematopoietic stem cell transplantation (HSCT). In particular, the 3′UTR rs9277534-G/A SNP in HLA-DPB1 has been associated with graft-versus-host-disease after HSCT (Expression model); however its relevance in different immune cells and its mode of action have not been systematically addressed. In addition, there is a strong though not complete overlap between the rs9277534-G/A SNP and structural HLA-DPB1 T cell epitope (TCE) groups which have also been associated with HSCT outcome (TCE Structural model). Here we confirm and extend previous findings of significantly higher HLA-DPB1 expression in B cell lines, unstimulated primary B cells, and monocytes homozygous for rs9277534-G compared to those homozygous for rs9277534-A. However, these differences were abrogated by interferon-γ stimulation or differentiation into dendritic cells. We identify at least seven 3′UTR rs9277534-G/A haplotypes differing by a total of 37 SNP, also characterized by linkage to length variants of a short tandem repeat (STR) in intron 2 and TCE group assignment. 3′UTR mapping did not show any significant differences in post-transcriptional regulation assessed by luciferase assays between two representative rs9277534-G/A haplotypes for any of eight overlapping fragments. Moreover, no evidence for alternative splicing associated with the intron 2 STR was obtained by RT-PCR. In an exemplary cohort of 379 HLA-DPB1 mismatched donor-recipient pairs, risk prediction by the Expression model and the Structural TCE model was 36.7% concordant, with the majority of discordances due to non-applicability of the Expression model. HLA-DPB1 from different TCE groups expressed in the absence of the 3′UTR at similar levels by transfected HeLa cells elicited significantly different mean alloreactive CD4+ T-cell responses, as assessed by CD137 upregulation assays in 178 independent cultures. Taken together, our data provide new insights into the cell type-specific and mechanistic basis of the association between the rs9277534-G/A SNP and HLA-DPB1 expression, and show that, despite partial overlap between both models in HSCT risk-prediction, differential alloreactivity determined by the TCE structural model occurs independently from HLA-DPB1 differential expression.
Collapse
Affiliation(s)
- Thuja Meurer
- Institute for Experimental Cellular Therapy, University Hospital Essen, Essen, Germany
| | | | - Maximilian Metzing
- Institute for Experimental Cellular Therapy, University Hospital Essen, Essen, Germany
| | - Mona-May Langer
- Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany
| | - Peter van Balen
- Department of Hematology, Leiden University Medical Center, Leiden, Netherlands
| | | | - Dietrich W Beelen
- Department of Bone Marrow Transplantation, West German Cancer Center, University Hospital Essen, Essen, Germany
| | - Peter A Horn
- Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany
| | - Katharina Fleischhauer
- Institute for Experimental Cellular Therapy, University Hospital Essen, Essen, Germany.,Deusches Konsortium für Translationale Krebsforschung (DKTK), Heidelberg, Germany
| | - Pietro Crivello
- Institute for Experimental Cellular Therapy, University Hospital Essen, Essen, Germany
| |
Collapse
|
10
|
Espinosa JR, Mou D, Adams BW, DiBernardo LR, MacDonald AL, McRae M, Miller AN, Song M, Stempora LL, Wang J, Iwakoshi NN, Kirk AD. T Cell Repertoire Maturation Induced by Persistent and Latent Viral Infection Is Insufficient to Induce Costimulation Blockade Resistant Organ Allograft Rejection in Mice. Front Immunol 2018; 9:1371. [PMID: 29963060 PMCID: PMC6013589 DOI: 10.3389/fimmu.2018.01371] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 06/01/2018] [Indexed: 12/22/2022] Open
Abstract
CD28:CD80/86 pathway costimulation blockade (CoB) with the CD80/86-specific fusion protein CTLA4-Ig prevents T cell-mediated allograft rejection in mice. However, in humans, transplantation with CoB has been hampered by CoB-resistant rejection (CoBRR). CoBRR has been attributed in part to pathogen-driven T cell repertoire maturation and resultant heterologous alloreactive memory. This has been demonstrated experimentally in mice. However, prior murine models have used viral pathogens, CoB regimens, graft types, and/or antigen systems atypically encountered clinically. We therefore sought to explore whether CoBRR would emerge in a model of virus-induced memory differentiation designed to more closely mimic clinical conditions. Specifically, we examined mouse homologs of clinically prevalent viruses including murine polyomavirus, cytomegalovirus, and gammaherpesvirus 68 in the presence of clinically relevant maintenance CoB regimens using a fully MHC-mismatched, vascularized allograft model. Infected mice developed a significant, sustained increase in effector memory T cells consistent with that seen in humans, but neither developed heterologous alloreactivity nor rejected primarily vascularized heterotopic heart transplants at an increased rate compared with uninfected mice. These results indicate that memory acquisition alone is insufficient to provoke CoBRR and suggest that knowledge of prior latent or persistent viral infection may have limited utility in anticipating heterologous CoB-resistant alloimmunity.
Collapse
Affiliation(s)
- Jaclyn R Espinosa
- Department of Surgery, Emory University, Atlanta, GA, United States.,Department of Surgery, Duke University, Durham, NC, United States
| | - Danny Mou
- Department of Surgery, Emory University, Atlanta, GA, United States
| | - Bartley W Adams
- Department of Surgery, Duke University, Durham, NC, United States
| | | | | | - MacKenzie McRae
- Department of Surgery, Duke University, Durham, NC, United States
| | - Allison N Miller
- Department of Surgery, Duke University, Durham, NC, United States
| | - Mingqing Song
- Department of Surgery, Duke University, Durham, NC, United States
| | - Linda L Stempora
- Department of Surgery, Duke University, Durham, NC, United States
| | - Jun Wang
- Department of Surgery, Duke University, Durham, NC, United States
| | - Neal N Iwakoshi
- Department of Surgery, Emory University, Atlanta, GA, United States
| | - Allan D Kirk
- Department of Surgery, Duke University, Durham, NC, United States
| |
Collapse
|
11
|
Xu J, Ma T, Deng G, Zhuang J, Li C, Wang S, Dai C, Zhou X, Shan Z, Qi Z. Inhibition of C-X-C motif chemokine 10 reduces graft loss mediated by memory CD8 + T cells in a rat cardiac re-transplant model. Exp Ther Med 2017; 15:1560-1567. [PMID: 29434741 DOI: 10.3892/etm.2017.5585] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 06/08/2017] [Indexed: 11/05/2022] Open
Abstract
The interaction of chemokine (C-X-C motif) ligand 10 (CXCL10) with its receptor (CXCR3) is a critical process in recruiting donor reactive T cells to a graft and alloantigen-specific memory T (Tm) cells exert a principal function in promoting graft dysfunction during accelerated cardiac rejection. However, whether CXCL10 chemokine exerts any effects on acute accelerated rejection mediated by CD8+ Tm cells in a re-transplant model has remained elusive. The present study established a cardiac transplant model by advanced microsurgery technology and improved organ storage. A novel rat model of cardiac re-transplantation was established at 40 days following primary heart transplant. The experiment included two parts, and when models were established, the rats were divided into two groups: Primary cardiac transplant (HTx) and re-transplantation without treatment (HRTx). In part 1, recipients from part 2, including re-transplantation without treatment (HRTx+NS) and re-transplantation treated with anti-CXCL10 antibodies (500 µg every other day by intraperitoneal injection; HRTx+CXCL10 Abs group). The graft survival time was observed and graft infiltration by inflammatory cells was assessed via histology of cardiac graft sections; in addition, the gene expression and the serum concentration of CXCL10 in each group was assessed. Indexes such as rejection-associated cytokines were assayed by reverse-transcription quantitative PCR and ELISA kits, and flow cytometry of splenocytes was used to detect Tm cells in the re-transplantation groups. The results demonstrated that level of CXCL10 was significantly increased and the graft mean survival time was shortened accompanied with aggravated lymphocyte cell infiltration in the HRTx group when compared that in the HTx group; in addition, the serum levels and mRNA expression of interleukin (IL)-2 and interferon (IFN)-γ were increased, while transforming growth factor (TGF)-β was decreased in the HRTx group. Furthermore, neutralization of CXCL10 prolonged the graft mean survival time and delayed accelerated rejection. Compared with that in the HRTx+NS group, serum levels and graft tissue mRNA expression of IFN-γ and IL-2 were decreased in the HRTx+CXCL10 Abs group, while TGF-β mRNA was significantly increased but the serum concentration was not significantly affected. In addition, there was no difference in IL-10 between the two groups, while delayed accelerated rejection paralleled with inflammatory cell infiltration decreased and the proliferation and differentiation of CD8+ Tm cells in secondary lymphoid organs were reduced in the HRTx+CXCL10 Abs group vs. those in the HRTx+NS group. The present study demonstrated that CXCL10 had a crucial role in cardiac transplantation and re-transplantation, and that treatment with CXCL10 antibodies delays accelerated acute rejection mediated by Tm cells in a rat model of cardiac re-transplantation.
Collapse
Affiliation(s)
- Jiacheng Xu
- Department of Cardiac Surgery, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian 361003, P.R. China
| | - Teng Ma
- Department of Cardiac Surgery, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian 361003, P.R. China
| | - Guorong Deng
- Department of Cardiac Surgery, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian 361003, P.R. China
| | - Jiawei Zhuang
- Department of Cardiac Surgery, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian 361003, P.R. China
| | - Cheng Li
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen, Fujian 361005, P.R. China
| | - Shaohu Wang
- Medical College, Xiamen University, Xiamen, Fujian 361005, P.R. China
| | - Chen Dai
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen, Fujian 361005, P.R. China
| | - Xiaobiao Zhou
- Department of Cardiac Surgery, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian 361003, P.R. China
| | - Zhonggui Shan
- Department of Cardiac Surgery, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian 361003, P.R. China
| | - Zhongquan Qi
- Organ Transplantation Institute, Medical College, Xiamen University, Xiamen, Fujian 361005, P.R. China
| |
Collapse
|
12
|
Mahr B, Wekerle T. Murine models of transplantation tolerance through mixed chimerism: advances and roadblocks. Clin Exp Immunol 2017; 189:181-189. [PMID: 28395110 PMCID: PMC5508343 DOI: 10.1111/cei.12976] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/05/2017] [Indexed: 02/06/2023] Open
Abstract
Organ transplantation is the treatment of choice for patients with end-stage organ failure, but chronic immunosuppression is taking its toll in terms of morbidity and poor efficacy in preventing late graft loss. Therefore, a drug-free state would be desirable where the recipient permanently accepts a donor organ while remaining otherwise fully immunologically competent. Mouse studies unveiled mixed chimerism as an effective approach to induce such donor-specific tolerance deliberately and laid the foundation for a series of clinical pilot trials. Nevertheless, its widespread clinical implementation is currently prevented by cytotoxic conditioning and limited efficacy. Therefore, the use of mouse studies remains an indispensable tool for the development of novel concepts with potential for translation and for the delineation of underlying tolerance mechanisms. Recent innovations developed in mice include the use of pro-apoptotic drugs or regulatory T cell (Treg ) transfer for promoting bone marrow engraftment in the absence of myelosuppression and new insight gained in the role of innate immunity and the interplay between deletion and regulation in maintaining tolerance in chimeras. Here, we review these and other recent advances in murine studies inducing transplantation tolerance through mixed chimerism and discuss both the advances and roadblocks of this approach.
Collapse
Affiliation(s)
- B. Mahr
- Section of Transplantation Immunology, Department of SurgeryMedical University of ViennaViennaAustria
| | - T. Wekerle
- Section of Transplantation Immunology, Department of SurgeryMedical University of ViennaViennaAustria
| |
Collapse
|
13
|
Memory T cells: A helpful guard for allogeneic hematopoietic stem cell transplantation without causing graft-versus-host disease. Hematol Oncol Stem Cell Ther 2017. [PMID: 28636890 DOI: 10.1016/j.hemonc.2017.05.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Graft-versus-host disease (GVHD) is a major complication of allogeneic hematopoietic stem cell transplantation (AHSCT) and the major cause of nonrelapse morbidity and mortality of AHSCT. In AHSCT, donor T cells facilitate hematopoietic stem cell (HSC) engraftment, contribute to anti-infection immunity, and mediate graft-versus-leukemia (GVL) responses. However, activated alloreactive T cells also attack recipient cells in vital organs, leading to GVHD. Different T-cell subsets, including naïve T (TN) cells, memory T (TM) cells, and regulatory T (Treg) cells mediate different forms of GVHD and GVL; TN cells mediate severe GVHD, whereas TM cells do not cause GVHD, but preserve T-cell function including GVL. In addition, metabolic reprogramming controls T-cell differentiation and activation in these disease states. This minireview focuses on the role and the related mechanisms of TM cells in AHSCT, and the potential manipulation of T cells in AHSCT.
Collapse
|
14
|
Samy KP, Anderson DA, Lo DJ, Mulvihill MS, Song M, Farris AB, Parker BS, MacDonald AL, Lu C, Springer TA, Kachlany SC, Reimann KA, How T, Leopardi FV, Franke KS, Williams KD, Collins BH, Kirk AD. Selective Targeting of High-Affinity LFA-1 Does Not Augment Costimulation Blockade in a Nonhuman Primate Renal Transplantation Model. Am J Transplant 2017; 17:1193-1203. [PMID: 27888551 PMCID: PMC5409867 DOI: 10.1111/ajt.14141] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2016] [Revised: 11/01/2016] [Accepted: 11/08/2016] [Indexed: 01/25/2023]
Abstract
Costimulation blockade (CoB) via belatacept is a lower-morbidity alternative to calcineurin inhibitor (CNI)-based immunosuppression. However, it has higher rates of early acute rejection. These early rejections are mediated in part by memory T cells, which have reduced dependence on the pathway targeted by belatacept and increased adhesion molecule expression. One such molecule is leukocyte function antigen (LFA)-1. LFA-1 exists in two forms: a commonly expressed, low-affinity form and a transient, high-affinity form, expressed only during activation. We have shown that antibodies reactive with LFA-1 regardless of its configuration are effective in eliminating memory T cells but at the cost of impaired protective immunity. Here we test two novel agents, leukotoxin A and AL-579, each of which targets the high-affinity form of LFA-1, to determine whether this more precise targeting prevents belatacept-resistant rejection. Despite evidence of ex vivo and in vivo ligand-specific activity, neither agent when combined with belatacept proved superior to belatacept monotherapy. Leukotoxin A approached a ceiling of toxicity before efficacy, while AL-579 failed to significantly alter the peripheral immune response. These data, and prior studies, suggest that LFA-1 blockade may not be a suitable adjuvant agent for CoB-resistant rejection.
Collapse
Affiliation(s)
- KP Samy
- Department of Surgery, Duke University School of Medicine, Durham, NC 27710
| | - DA Anderson
- Emory Transplant Center, Emory University School of Medicine, Atlanta, GA 30322
| | - DJ Lo
- Emory Transplant Center, Emory University School of Medicine, Atlanta, GA 30322
| | - MS Mulvihill
- Department of Surgery, Duke University School of Medicine, Durham, NC 27710
| | - M Song
- Department of Surgery, Duke University School of Medicine, Durham, NC 27710
| | - AB Farris
- Department of Pathology & Laboratory Medicine, Emory University School of Medicine, Atlanta, GA 30322
| | - BS Parker
- Department of Surgery, Duke University School of Medicine, Durham, NC 27710
| | - AL MacDonald
- Department of Surgery, Duke University School of Medicine, Durham, NC 27710
| | - C Lu
- Program in Cellular and Molecular Medicine, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115
| | - TA Springer
- Program in Cellular and Molecular Medicine, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115
| | - SC Kachlany
- Rutgers University, School of Medicine, Newark, NJ 07103,Actinobac Biomed, Inc., Kendall Park, NJ 08824
| | - KA Reimann
- Mass-Biologics, University of Massachusetts Medical School, Boston, MA 02126
| | - T How
- Department of Surgery, Duke University School of Medicine, Durham, NC 27710
| | - FV Leopardi
- Department of Surgery, Duke University School of Medicine, Durham, NC 27710
| | - KS Franke
- Division of Laboratory Animal Resources, Duke University, Durham, NC 27710
| | - KD Williams
- Division of Laboratory Animal Resources, Duke University, Durham, NC 27710
| | - BH Collins
- Department of Surgery, Duke University School of Medicine, Durham, NC 27710
| | - AD Kirk
- Department of Surgery, Duke University School of Medicine, Durham, NC 27710,Emory Transplant Center, Emory University School of Medicine, Atlanta, GA 30322
| |
Collapse
|
15
|
Patterns of Early Rejection in Renal Retransplantation: A Single-Center Experience. J Immunol Res 2016; 2016:2697860. [PMID: 28058265 PMCID: PMC5183764 DOI: 10.1155/2016/2697860] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 11/09/2016] [Indexed: 02/06/2023] Open
Abstract
It has been reported that kidney retransplant patients had high rates of early acute rejection due to previous sensitization. In addition to the acute antibody-mediated rejection (ABMR) that has received widespread attention, the early acute T-cell-mediated rejection (TCMR) may be another important issue in renal retransplantation. In the current single-center retrospective study, we included 33 retransplant patients and 90 first transplant patients with similar protocols of induction and maintenance therapy. Analysis focused particularly on the incidence and patterns of early acute rejection episodes, as well as one-year graft and patient survival. Excellent short-term clinical outcomes were obtained in both groups, with one-year graft and patient survival rates of 93.9%/100% in the retransplant group and 92.2%/95.6% in the first transplant group. Impressively, with our strict immunological selection and desensitization criteria, the retransplant patients had a very low incidence of early acute ABMR (6.1%), which was similar to that in the first transplant patients (4.4%). However, a much higher rate of early acute TCMR was observed in the retransplant group than in the first transplant group (30.3% versus 5.6%, P < 0.001). Acute TCMR that develops early after retransplantation should be monitored in order to obtain better transplant outcomes.
Collapse
|
16
|
Ng ZY, Read C, Kurtz JM, Cetrulo CL. Memory T Cells in Vascularized Composite Allotransplantation. ACTA ACUST UNITED AC 2016. [DOI: 10.1080/23723505.2016.1229649] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
17
|
Luo L, Li Z, Luo G, Zhao Y, Yang J, Chen H. Role of Wnt3a expressed by dendritic cells in the activation of canonical Wnt signaling and generation of memory T cells during primary immune responses. Cell Immunol 2016; 310:99-107. [PMID: 27544306 DOI: 10.1016/j.cellimm.2016.08.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 08/12/2016] [Accepted: 08/13/2016] [Indexed: 11/17/2022]
Abstract
The presence of memory T cells (TMs) hinders transplant survival. Dendritic cells (DCs) induce the generation of TMs during primary immune responses. However, the specific mechanisms are unclear. In this study, we constructed a Wnt3a-expressing adenovirus and used small interfering RNA (siRNA) targeting Wnt3a to investigate the influence of Wnt3a expression in DCs on the generation of TMs during primary immune responses. Our results demonstrated that the Wnt3a expression levels in DCs influenced the generation of TMs after 5days in co-culture with naïve T cells through activation of the Wnt canonical pathway. Interleukin-7 secretion levels in supernatants of DC/TNs co-cultures showed a similar pattern of Wnt3a expression levels in DCs. These findings provide a better understanding of TMs generation mechanisms that might be useful to improve transplant outcomes.
Collapse
Affiliation(s)
- Lei Luo
- Department of Research and Education, Guizhou Province People's Hospital, Guiyang 550002, China
| | - Zhengyu Li
- Department of Thoracic Surgery, Guizhou Province People's Hospital, Guiyang 550002, China
| | - Guangheng Luo
- Department of Urology, Guizhou Province People's Hospital, Guiyang 550002, China
| | - Yingting Zhao
- Department of Research and Education, Guizhou Province People's Hospital, Guiyang 550002, China
| | - Jing Yang
- Department of Cardiology, Guizhou Province People's Hospital, Guiyang 550002, China
| | - Hui Chen
- Department of Research and Education, Guizhou Province People's Hospital, Guiyang 550002, China.
| |
Collapse
|
18
|
Lin K, Chen S, Chen G. Role of Memory T Cells and Perspectives for Intervention in Organ Transplantation. Front Immunol 2015; 6:473. [PMID: 26441978 PMCID: PMC4568416 DOI: 10.3389/fimmu.2015.00473] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2015] [Accepted: 08/31/2015] [Indexed: 12/12/2022] Open
Abstract
Memory T cells are necessary for protective immunity against invading pathogens, especially under conditions of immunosuppression. However, their presence also threatens transplant survival, making transplantation a great challenge. Significant progress has been achieved in recent years in advancing our understanding of the role that memory T cells play in transplantation. This review focuses on the latest advances in our understanding of the involvement of memory T cells in graft rejection and transplant tolerance and discusses potential strategies for targeting memory T cells in order to minimize allograft rejection and optimize clinical outcomes.
Collapse
Affiliation(s)
- Kailin Lin
- Institute of Organ Transplantation, Tongji Hospital, Huazhong University of Science and Technology , Wuhan , China
| | - Song Chen
- Institute of Organ Transplantation, Tongji Hospital, Huazhong University of Science and Technology , Wuhan , China ; Key Laboratory of Organ Transplantation, Ministry of Education , Wuhan , China ; Key Laboratory of Organ Transplantation, Ministry of Public Health , Wuhan , China
| | - Gang Chen
- Institute of Organ Transplantation, Tongji Hospital, Huazhong University of Science and Technology , Wuhan , China ; Key Laboratory of Organ Transplantation, Ministry of Education , Wuhan , China ; Key Laboratory of Organ Transplantation, Ministry of Public Health , Wuhan , China
| |
Collapse
|
19
|
Abstract
PURPOSE OF REVIEW Experimental models have contributed enormously to basic immunology. However, the use of reductionist experiments has produced results that are not always successfully translated into the clinic. Recently, incorporation of more realistic clinical parameters in experimental designs has produced new insights relevant to cardiac transplantation. RECENT FINDINGS Experiments in mice have provided crucial insights into the concept that T cell responses to pathogens generate memory cells with cross-reactive specificities for histocompatibility antigens. These memory T cells are resistant to current immunosuppressive strategies. Memory T cells infiltrate grafts within hours after transplantation, and grafts subjected to clinically relevant periods of cold ischemia are more susceptible to injury by this cellular infiltrate. Early immune responses now can be investigated with improved 'humanized' mice. Mice with multiple knock-in genes for human cytokines support development of human monocytes, macrophages and natural killer cells in increased numbers and with better function. SUMMARY Better and more clinically relevant experimental designs are providing animal models tailored to address clinic exigencies.
Collapse
|
20
|
Dai H, Peng F, Lin M, Xia J, Yu S, Lan G, Wang Y, Xie X, Fang C, Corbascio M, Qi Z, Peng L. Anti-OX40L monoclonal antibody prolongs secondary heart allograft survival based on CD40/CD40L and LFA-1/ICAM-1 blockade. Transpl Immunol 2015; 32:84-91. [PMID: 25613092 DOI: 10.1016/j.trim.2015.01.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 01/11/2015] [Accepted: 01/12/2015] [Indexed: 12/18/2022]
Abstract
BACKGROUND Memory T cells (Tms) form a barrier against long-term allograft survival; however, CD4(+)Foxp3(+) regulatory T cells (Tregs) can suppress allograft rejection. The OX40/OX40L pathway is critical to the generation of Tms and turns off Treg suppressor function. METHODS B6 mice that rejected BALB/c skin grafts after 4 weeks were used as the secondary heart transplant recipients. The skin recipient mice, termed S0, S2 and S3, were treated with the isotype antibodies, anti-CD40L/LFA-1 or anti-OX40L combined with anti-CD40L/LFA-1 mAbs, respectively. The secondary heart recipients, termed H0 and H2, received anti-CD40L/LFA-1 mAbs or not, respectively (Fig. 1). RESULTS Four weeks after primary skin transplantation, the Tms in the S3 group that received anti-OX40L with anti-CD40L/LFA-1 mAbs were reduced compared to those in the S2 group (CD4(+) Tm: 32.61 ± 2.20% in S2 vs. 25.36 ± 1.16% in S3; CD8(+) Tm: 27.76 ± 1.96% in S2 vs. 20.95 ± 1.30% in S3; P < 0.01). Meanwhile, the proportions of Tregs in S3 increased compared to those in S2 (P < 0.05). The anti-OX40L with anti-CD40L/LFA-1 mAbs group (S3H2) prolonged the mean survival time (MST) following secondary heart transplantation from 9.5 days to 21 days (P < 0.001). Furthermore, allogeneic proliferation of recipient splenic T cells and graft-infiltrating lymphocytes were significantly inhibited in the S3H2 group. Additionally, a higher level of IL-10 was detected in sera and allografts. CONCLUSIONS Anti-OX40L mAb could prolong secondary heart allograft survival based on CD40/CD40L and LFA-1/ICAM-1 blockade. The mechanism of protecting allografts using anti-OX40L mAb involved impairing the generation of Tm and up-regulating IL-10 producing Tregs, inhibiting the function of T cells.
Collapse
Affiliation(s)
- Helong Dai
- Department of Urological Organ Transplantation, Center of Organ Transplantation, Second Xiangya Hospital, Central South University, Hunan Province, PR China
| | - Fenghua Peng
- Department of Urological Organ Transplantation, Center of Organ Transplantation, Second Xiangya Hospital, Central South University, Hunan Province, PR China
| | - Minjie Lin
- Department of Cardiology, Second Xiangya Hospital, Central South University, Hunan Province, PR China
| | - Junjie Xia
- Organ Transplantation Institute, Xiamen University, Fujian Province, PR China
| | - Shaojie Yu
- Department of Urological Organ Transplantation, Center of Organ Transplantation, Second Xiangya Hospital, Central South University, Hunan Province, PR China
| | - Gongbin Lan
- Department of Urological Organ Transplantation, Center of Organ Transplantation, Second Xiangya Hospital, Central South University, Hunan Province, PR China
| | - Yu Wang
- Department of Urological Organ Transplantation, Center of Organ Transplantation, Second Xiangya Hospital, Central South University, Hunan Province, PR China
| | - Xubiao Xie
- Department of Urological Organ Transplantation, Center of Organ Transplantation, Second Xiangya Hospital, Central South University, Hunan Province, PR China
| | - Chunhua Fang
- Department of Urological Organ Transplantation, Center of Organ Transplantation, Second Xiangya Hospital, Central South University, Hunan Province, PR China
| | | | - Zhongquan Qi
- Organ Transplantation Institute, Xiamen University, Fujian Province, PR China
| | - Longkai Peng
- Department of Urological Organ Transplantation, Center of Organ Transplantation, Second Xiangya Hospital, Central South University, Hunan Province, PR China.
| |
Collapse
|