1
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Zhang X, Wang J, Wang M, Du M, Chen J, Wang L, Wu J. IFN-β Pretreatment Alleviates Allogeneic Renal Tubular Epithelial Cell-Induced NK Cell Responses via the IRF7/HLA-E/NKG2A Axis. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2024; 212:715-722. [PMID: 38149913 DOI: 10.4049/jimmunol.2200941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 12/06/2023] [Indexed: 12/28/2023]
Abstract
Immune checkpoint molecules are promising targets for suppressing the immune response but have received little attention in immune tolerance induction in organ transplantation. In this study, we found that IFN-β could induce the expression of HLA-E as well as PD-L1 on human renal tubular epithelial cell line HK-2 and renal tissue of the C57BL/6 mouse. The JAK/STAT2 pathway was necessary for this process. Upregulation of both HLA-E and PD-L1 was fully abrogated by the JAK1/2 inhibitor ruxolitinib. Signaling pathway molecules, including STAT1, STAT2, mTOR, Tyk2, and p38 MAPK, were involved in HLA-E and PD-L1 upregulation. IRF7 is the key transcription factor responsible for the activation of HLA-E and PD-L1 promoters. Through screening an epigenetic regulation library, we found a natural compound, bisdemethoxycurcumin, enhanced IFN-β-induced HLA-E and PD-L1 expression in vitro and in vivo. In PBMC-derived CD56+ NK cells, we found that NKG2A but not PD1 was constitutively expressed, indicating HLA-E/NKG2A as a more potent target to induce tolerance to innate immune cells. Pretreating HK-2 cells by IFN-β significantly attenuated the degranulation of their coincubated NK cells and protected cells from NK-mediated lysis. In conclusion, IFN-β pretreatment could activate HLA-E and PD-L1 transcription through the JAK/STAT/IRF7 pathway and then could protect renal tubular epithelial cells from allogeneic immune attack mediated by NK cells.
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Affiliation(s)
- Xing Zhang
- Kidney Disease Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Junni Wang
- Kidney Disease Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Mowang Wang
- Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Mengbao Du
- Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jianghua Chen
- Kidney Disease Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Limengmeng Wang
- Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jianyong Wu
- Kidney Disease Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Key Laboratory of Kidney Disease Prevention and Control Technology, Zhejiang Province, Hangzhou, China
- Institute of Nephrology, Zhejiang University, Hangzhou, China
- Zhejiang Clinical Research Center of Kidney and Urinary System Disease, Hangzhou, China
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2
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Legaz I, Bolarín JM, Campillo JA, Moya-Quiles MR, Miras M, Muro M, Minguela A, Álvarez-López MR. Killer Cell Immunoglobulin-like Receptors (KIR) and Human Leucocyte Antigen C (HLA-C) Increase the Risk of Long-Term Chronic Liver Graft Rejection. Int J Mol Sci 2022; 23:ijms232012155. [PMID: 36293011 PMCID: PMC9603177 DOI: 10.3390/ijms232012155] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 10/06/2022] [Accepted: 10/10/2022] [Indexed: 11/16/2022] Open
Abstract
Chronic liver rejection (CR) represents a complex clinical situation because many patients do not respond to increased immunosuppression. Killer cell immunoglobulin-like receptors/Class I Human Leukocyte Antigens (KIR/HLA-I) interactions allow for predicting Natural Killer (NK) cell alloreactivity and influence the acute rejection of liver allograft. However, its meaning in CR liver graft remains controversial. KIR and HLA genotypes were studied in 513 liver transplants using sequence-specific oligonucleotides (PCR-SSO) methods. KIRs, human leucocyte antigen C (HLA-C) genotypes, KIR gene mismatches, and the KIR/HLA-ligand were analyzed and compared in overall transplants with CR (n = 35) and no-chronic rejection (NCR = 478). Activating KIR (aKIR) genes in recipients (rKIR2DS2+ and rKIR2DS3+) increased CR compared with NCR groups (p = 0.013 and p = 0.038). The inhibitory KIR (iKIR) genes in recipients rKIR2DL2+ significantly increased the CR rate compared with their absence (9.1% vs. 3.7%, p = 0.020). KIR2DL3 significantly increases CR (13.1% vs. 5.2%; p = 0.008). There was no influence on NCR. CR was observed in HLA-I mismatches (MM). The absence of donor (d) HLA-C2 ligand (dC2−) ligand increases CR concerning their presence (13.1% vs. 5.6%; p = 0.018). A significant increase of CR was observed in rKIR2DL3+/dC1− (p = 0.015), rKIR2DS4/dC1− (p = 0.014) and rKIR2DL3+/rKIR2DS4+/dC1− (p = 0.006). Long-term patient survival was significantly lower in rKIR2DS1+rKIR2DS4+/dC1− at 5–10 years post-transplant. This study shows the influence of rKIR/dHLA-C combinations and aKIR gene-gene mismatches in increasing CR and KIR2DS1+/C1-ligands and the influence of KIR2DS4+/C1-ligands in long-term graft survival.
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Affiliation(s)
- Isabel Legaz
- Department of Legal and Forensic Medicine, Biomedical Research Institute (IMIB), Regional Campus of International Excellence “Campus Mare Nostrum”, Faculty of Medicine, University of Murcia, 30120 Murcia, Spain
- Correspondence: ; Tel.: +34-868883957; Fax: +34-868834307
| | - Jose Miguel Bolarín
- Department of Legal and Forensic Medicine, Biomedical Research Institute (IMIB), Regional Campus of International Excellence “Campus Mare Nostrum”, Faculty of Medicine, University of Murcia, 30120 Murcia, Spain
| | - Jose Antonio Campillo
- Immunology Service, Instituto Murciano de Investigación biosanitaria (IMIB), Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Hospital Clínico Universitario Virgen de la Arrixaca (HCUVA), 30120 Murcia, Spain
| | - María R. Moya-Quiles
- Immunology Service, Instituto Murciano de Investigación biosanitaria (IMIB), Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Hospital Clínico Universitario Virgen de la Arrixaca (HCUVA), 30120 Murcia, Spain
| | - Manuel Miras
- Digestive Medicine Service, Hospital Clínico Universitario Virgen de la Arrixaca (HCUVA), 30120 Murcia, Spain
| | - Manuel Muro
- Immunology Service, Instituto Murciano de Investigación biosanitaria (IMIB), Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Hospital Clínico Universitario Virgen de la Arrixaca (HCUVA), 30120 Murcia, Spain
| | - Alfredo Minguela
- Immunology Service, Instituto Murciano de Investigación biosanitaria (IMIB), Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Hospital Clínico Universitario Virgen de la Arrixaca (HCUVA), 30120 Murcia, Spain
| | - María R. Álvarez-López
- Immunology Service, Instituto Murciano de Investigación biosanitaria (IMIB), Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Hospital Clínico Universitario Virgen de la Arrixaca (HCUVA), 30120 Murcia, Spain
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3
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Zamir MR, Shahi A, Salehi S, Amirzargar A. Natural killer cells and killer cell immunoglobulin-like receptors in solid organ transplantation: Protectors or opponents? Transplant Rev (Orlando) 2022; 36:100723. [DOI: 10.1016/j.trre.2022.100723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 07/20/2022] [Accepted: 07/25/2022] [Indexed: 10/16/2022]
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4
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Campos-Mora M, De Solminihac J, Rojas C, Padilla C, Kurte M, Pacheco R, Kaehne T, Wyneken Ú, Pino-Lagos K. Neuropilin-1 is present on Foxp3+ T regulatory cell-derived small extracellular vesicles and mediates immunity against skin transplantation. J Extracell Vesicles 2022; 11:e12237. [PMID: 35676234 PMCID: PMC9177693 DOI: 10.1002/jev2.12237] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 05/16/2022] [Accepted: 05/27/2022] [Indexed: 12/14/2022] Open
Abstract
Among the mechanisms of suppression that T regulatory (Treg) cells exert to control the immune responses, the secretion of small extracellular vesicles (sEV) has been recently proposed as a novel contact‐independent immunomodulatory mechanism. Previous studies have demonstrated that Treg cells produce sEV, including exosomes, able to modulate the effector function of CD4+ T cells, and antigen presenting cells (APCs) such as dendritic cells (DCs) through the transfer of microRNA, cytokines, the production of adenosine, among others. Previously, we have demonstrated that Neuropilin‐1 (Nrp1) is required for Tregs‐mediated immunosuppression mainly by impacting on the phenotype and function of effector CD4+ T cells. Here, we show that Foxp3+ Treg cells secrete sEV, which bear Nrp1 in their membrane. These sEV modulate effector CD4+ T cell phenotype and proliferation in vitro in a Nrp1‐dependent manner. Proteomic analysis indicated that sEV obtained from wild type (wt) and Nrp1KO Treg cells differed in proteins related to immune tolerance, finding less representation of CD73 and Granzyme B in sEV obtained from Nrp1KO Treg cells. Likewise, we show that Nrp1 is required in Treg cell‐derived sEV for inducing skin transplantation tolerance, since a reduction in graft survival and an increase on M1/M2 ratio were found in animals treated with Nrp1KO Treg cell‐derived sEV. Altogether, this study describes for the first time that Treg cells secrete sEV containing Nrp1 and that this protein, among others, is necessary to promote transplantation tolerance in vivo via sEV local administration.
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Affiliation(s)
- Mauricio Campos-Mora
- Centro de Investigación e Innovación Biomédica, Facultad de Medicina, Universidad de los Andes, Santiago, Chile
| | - Javiera De Solminihac
- Centro de Investigación e Innovación Biomédica, Facultad de Medicina, Universidad de los Andes, Santiago, Chile
| | - Carolina Rojas
- Periodontal Biology Laboratory, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - Cristina Padilla
- Centro de Investigación e Innovación Biomédica, Facultad de Medicina, Universidad de los Andes, Santiago, Chile
| | - Mónica Kurte
- Centro de Investigación e Innovación Biomédica, Facultad de Medicina, Universidad de los Andes, Santiago, Chile
| | - Rodrigo Pacheco
- Laboratorio de Neuroinmunología, Centro Ciencia & Vida, Fundación Ciencia & Vida, Santiago, Chile
| | - Thilo Kaehne
- Institute of Experimental Medicine, Medical Faculty, Otto von Guericke University, Magdeburg, Germany
| | - Úrsula Wyneken
- Centro de Investigación e Innovación Biomédica, Facultad de Medicina, Universidad de los Andes, Santiago, Chile
| | - Karina Pino-Lagos
- Centro de Investigación e Innovación Biomédica, Facultad de Medicina, Universidad de los Andes, Santiago, Chile
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5
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Duygu B, Olieslagers TI, Groeneweg M, Voorter CEM, Wieten L. HLA Class I Molecules as Immune Checkpoints for NK Cell Alloreactivity and Anti-Viral Immunity in Kidney Transplantation. Front Immunol 2021; 12:680480. [PMID: 34295330 PMCID: PMC8290519 DOI: 10.3389/fimmu.2021.680480] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Accepted: 06/14/2021] [Indexed: 12/12/2022] Open
Abstract
Natural killer (NK) cells are innate lymphocytes that can kill diseased- or virally-infected cells, mediate antibody dependent cytotoxicity and produce type I immune-associated cytokines upon activation. NK cells also contribute to the allo-immune response upon kidney transplantation either by promoting allograft rejection through lysis of cells of the transplanted organ or by promoting alloreactive T cells. In addition, they protect against viral infections upon transplantation which may be especially relevant in patients receiving high dose immune suppression. NK cell activation is tightly regulated through the integrated balance of signaling via inhibitory- and activating receptors. HLA class I molecules are critical regulators of NK cell activation through the interaction with inhibitory- as well as activating NK cell receptors, hence, HLA molecules act as critical immune checkpoints for NK cells. In the current review, we evaluate how NK cell alloreactivity and anti-viral immunity are regulated by NK cell receptors belonging to the KIR family and interacting with classical HLA class I molecules, or by NKG2A/C and LILRB1/KIR2DL4 engaging non-classical HLA-E or -G. In addition, we provide an overview of the methods to determine genetic variation in these receptors and their HLA ligands.
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Affiliation(s)
- Burcu Duygu
- Department of Transplantation Immunology, Maastricht University Medical Center, Maastricht, Netherlands.,GROW, School for Oncology and Developmental Biology, Maastricht University, Maastricht, Netherlands
| | - Timo I Olieslagers
- Department of Transplantation Immunology, Maastricht University Medical Center, Maastricht, Netherlands.,GROW, School for Oncology and Developmental Biology, Maastricht University, Maastricht, Netherlands
| | - Mathijs Groeneweg
- Department of Transplantation Immunology, Maastricht University Medical Center, Maastricht, Netherlands.,GROW, School for Oncology and Developmental Biology, Maastricht University, Maastricht, Netherlands
| | - Christina E M Voorter
- Department of Transplantation Immunology, Maastricht University Medical Center, Maastricht, Netherlands.,GROW, School for Oncology and Developmental Biology, Maastricht University, Maastricht, Netherlands
| | - Lotte Wieten
- Department of Transplantation Immunology, Maastricht University Medical Center, Maastricht, Netherlands.,GROW, School for Oncology and Developmental Biology, Maastricht University, Maastricht, Netherlands
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6
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Pontrelli P, Rascio F, Castellano G, Grandaliano G, Gesualdo L, Stallone G. The Role of Natural Killer Cells in the Immune Response in Kidney Transplantation. Front Immunol 2020; 11:1454. [PMID: 32793200 PMCID: PMC7390843 DOI: 10.3389/fimmu.2020.01454] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Accepted: 06/04/2020] [Indexed: 12/13/2022] Open
Abstract
Natural killer cells (NK) represent a population of lymphocytes involved in innate immune response. In addition to their role in anti-viral and anti-tumor defense, they also regulate several aspects of the allo-immune response in kidney transplant recipients. Growing evidence suggests a key role of NK cells in the pathogenesis of immune-mediated graft damage in kidney transplantation. Specific NK cell subsets are associated with operational tolerance in kidney transplant patients. On the other side, allo-reactive NK cells are associated with chronic antibody-mediated rejection and graft loss. Moreover, NK cells can prime the adaptive immune system and promote the migration of other immune cells, such as dendritic cells, into the graft leading to an increased allo-immune response and, eventually, to chronic graft rejection. Finally, activated NK cells can infiltrate the transplanted kidney and cause a direct graft damage. Interestingly, immunosuppression can influence NK cell numbers and function, thus causing an increased risk of post-transplant neoplasia or infection. In this review, we will describe how these cells can influence the innate and the adaptive immune response in kidney transplantation and how immunosuppression can modulate NK behavior.
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Affiliation(s)
- Paola Pontrelli
- Nephrology, Dialysis and Transplantation Unit, Department of Emergency and Organ Transplantation, University of Bari Aldo Moro, Bari, Italy
| | - Federica Rascio
- Nephrology, Dialysis and Transplantation Unit, Department of Medical and Surgical Sciences, University of Foggia, Foggia, Italy
| | - Giuseppe Castellano
- Nephrology, Dialysis and Transplantation Unit, Department of Medical and Surgical Sciences, University of Foggia, Foggia, Italy
| | - Giuseppe Grandaliano
- Nephrology Unit, Department of Translational Medicine and Surgery, Università Cattolica del Sacro Cuore, Rome, Italy.,Fondazione Policlinico Universitario "A. Gemelli" IRCCS, Rome, Italy
| | - Loreto Gesualdo
- Nephrology, Dialysis and Transplantation Unit, Department of Emergency and Organ Transplantation, University of Bari Aldo Moro, Bari, Italy
| | - Giovanni Stallone
- Nephrology, Dialysis and Transplantation Unit, Department of Medical and Surgical Sciences, University of Foggia, Foggia, Italy
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7
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Zhu L, Aly M, Wang H, Karakizlis H, Weimer R, Morath C, Kuon RJ, Toth B, Opelz G, Daniel V. Decreased NK cell immunity in kidney transplant recipients late post-transplant and increased NK-cell immunity in patients with recurrent miscarriage. PLoS One 2017; 12:e0186349. [PMID: 29040297 PMCID: PMC5645130 DOI: 10.1371/journal.pone.0186349] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 10/01/2017] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND There is evidence that NK-cell reactivity might affect graft outcome in transplant recipients and pregnancy in women. METHOD NK-cell subsets were determined in whole blood using eight-colour-fluorescence flow cytometry in patients before and after renal transplantation, patients with recurrent miscarriage (RM) and healthy controls (HC). RESULTS Patients late post-transplant (late-Tx) with functioning renal transplants showed abnormally low CD56dimCD16+ NK-cells containing both perforin and granzyme (vs HC p = 0.021) whereas RM patients exhibited abnormally high numbers of these cells (vs HC p = 0.043). CD56dimCD16+perforin+granzyme+ NK-cell counts were strikingly different between the two patient groups (p<0.001). In addition, recipients late-Tx showed abnormally low CD8+ NK-cells (vs HC p<0.001) in contrast to RM patients who showed an abnormal increase (vs HC p = 0.008). CD8+ NK-cell counts were strongly different between the two patient groups (p<0.001). Higher perforin+granzyme+CD56dimCD16+ and CD8+ NK-cells were associated with impaired graft function (p = 0.044, p = 0.032). After in-vitro stimulation, CD56dimCD16+ and CD56brightCD16dim/- NK-cells showed strong upregulation of CD107a and IFNy, whereas the content of perforin decreased dramatically as a consequence of perforin release. Recipients late post-Tx showed less in-vitro perforin release (= less cytotoxicity) than HC (p = 0.037) and lower perforin release was associated with good graft function (r = 0.738, p = 0.037). Notably, we observed strong in-vitro perforin release in 2 of 6 investigated RM patients. When circulating IL10+CD56bright NK-cells were analyzed, female recipients late post-Tx (n = 9) showed significantly higher relative and absolute cell numbers than RM patients (p = 0.002 and p = 0.018, respectively); and high relative and absolute IL10+CD56bright NK-cell numbers in transplant recipients were associated with low serum creatinine (p = 0.004 and p = 0.012) and high glomerular filtration rate (p = 0.011 and p = 0.002, respectively). Female recipients late post-Tx exhibited similar absolute but higher relative numbers of IL10+IFNy- NK-cells than RM patients (p>0.05 and p = 0.016, respectively). CONCLUSION NK-cells with lower cytotoxicity and immunoregulatory function might contribute to good long-term graft outcome, whereas circulating NK-cells with normal or even increased cytotoxicity and less immunoregulatory capacity are observed in patients with RM.
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Affiliation(s)
- Li Zhu
- Transplantation-Immunology, Institute of Immunology, University Hospital Heidelberg, Im Neuenheimer Feld 305, Heidelberg, Germany
- Department of Hematology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Mostafa Aly
- Transplantation-Immunology, Institute of Immunology, University Hospital Heidelberg, Im Neuenheimer Feld 305, Heidelberg, Germany
- Nephrology unit, Internal Medicine Department, Assiut University, Âssiut, Egypt
| | - Haihao Wang
- Department of Cardiovascular Surgery, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Hristos Karakizlis
- Department of Internal Medicine, University of Giessen, Klinikstraße 33, Giessen, Germany
| | - Rolf Weimer
- Department of Internal Medicine, University of Giessen, Klinikstraße 33, Giessen, Germany
| | - Christian Morath
- Department of Nephrology, University of Heidelberg, Heidelberg, Germany
| | - Ruben Jeremias Kuon
- Department of Obstetrics and Gynecology, University Hospital Heidelberg, Im Neuenheimer Feld 440, Heidelberg, Germany
| | - Bettina Toth
- Department of Gynecological Endocrinology and Reproductive Medicine, Medical University Innsbruck, Anichstraße 35, Innsbruck, Austria
| | - Gerhard Opelz
- Transplantation-Immunology, Institute of Immunology, University Hospital Heidelberg, Im Neuenheimer Feld 305, Heidelberg, Germany
| | - Volker Daniel
- Transplantation-Immunology, Institute of Immunology, University Hospital Heidelberg, Im Neuenheimer Feld 305, Heidelberg, Germany
- * E-mail:
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8
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Toyoda M, Shin BH, Ge S, Mirocha J, Thomas D, Chu M, Rodriguez E, Chao C, Petrosyan A, Galera OA, Vo A, Choi J, Peng A, Kahwaji J, Jordan SC. Impact of Desensitization on Antiviral Immunity in HLA-Sensitized Kidney Transplant Recipients. J Immunol Res 2017; 2017:5672523. [PMID: 28265581 PMCID: PMC5317146 DOI: 10.1155/2017/5672523] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 12/15/2016] [Indexed: 12/15/2022] Open
Abstract
Viral infections represent significant morbidity and mortality factors in kidney transplant recipients, with CMV, EBV, and BKV infections being most common. Desensitization (DES) with IVIg and rituximab with/without plasma exchange followed by kidney transplantation with alemtuzumab induction increased successful transplant rates in HLA-sensitized patients but may represent an increased risk for viral infections due to severe lymphocyte depletion. Here, we report on the posttransplant viral infection status in 372 DES versus 538 non-DES patients. CMV and EBV viremia were significantly lower in DES patients, while BKV viremia was similar. This trend was observed primarily in CMV sero(-), EBV sero(+), and sero(-) patients. No patient developed PTLD. The incidence of BKAN, allograft, and patient survival was similar in both groups. These viral infections were not associated with subsequent allograft rejection which occurred within 6 months after the infection. Conclusions. The IVIg + rituximab desensitization combined with alemtuzumab induction with triple immunosuppression maintenance does not increase the risk for CMV, EBV, and BKV infections. Possible factors include, in addition to posttransplant antiviral prophylaxis and PCR monitoring, presence of memory T cells and antibodies specific to CMV and likely EBV, NK cell-mediated ADCC despite lymphocyte depletion, elimination of EBV and CMV reservoirs by rituximab and alemtuzumab, and use of IVIg with antiviral properties.
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Affiliation(s)
- Mieko Toyoda
- Transplant Immunology Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Bong-Ha Shin
- Transplant Immunology Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Shili Ge
- Transplant Immunology Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - James Mirocha
- Biostatistics Core, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - David Thomas
- Transplant Immunology Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Maggie Chu
- Transplant Immunology Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Edgar Rodriguez
- Transplant Immunology Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Christine Chao
- Transplant Immunology Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Anna Petrosyan
- Transplant Immunology Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Odette A. Galera
- Transplant Immunology Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Ashley Vo
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Jua Choi
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Alice Peng
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Joseph Kahwaji
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Stanley C. Jordan
- Comprehensive Transplant Center, Cedars-Sinai Medical Center, Los Angeles, CA, USA
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9
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Li L, Greene I, Readhead B, Menon MC, Kidd BA, Uzilov AV, Wei C, Philippe N, Schroppel B, He JC, Chen R, Dudley JT, Murphy B. Novel Therapeutics Identification for Fibrosis in Renal Allograft Using Integrative Informatics Approach. Sci Rep 2017; 7:39487. [PMID: 28051114 PMCID: PMC5209709 DOI: 10.1038/srep39487] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Accepted: 11/21/2016] [Indexed: 12/12/2022] Open
Abstract
Chronic allograft damage, defined by interstitial fibrosis and tubular atrophy (IF/TA), is a leading cause of allograft failure. Few effective therapeutic options are available to prevent the progression of IF/TA. We applied a meta-analysis approach on IF/TA molecular datasets in Gene Expression Omnibus to identify a robust 85-gene signature, which was used for computational drug repurposing analysis. Among the top ranked compounds predicted to be therapeutic for IF/TA were azathioprine, a drug to prevent acute rejection in renal transplantation, and kaempferol and esculetin, two drugs not previously described to have efficacy for IF/TA. We experimentally validated the anti-fibrosis effects of kaempferol and esculetin using renal tubular cells in vitro and in vivo in a mouse Unilateral Ureteric Obstruction (UUO) model. Kaempferol significantly attenuated TGF-β1-mediated profibrotic pathways in vitro and in vivo, while esculetin significantly inhibited Wnt/β-catenin pathway in vitro and in vivo. Histology confirmed significantly abrogated fibrosis by kaempferol and esculetin in vivo. We developed an integrative computational framework to identify kaempferol and esculetin as putatively novel therapies for IF/TA and provided experimental evidence for their therapeutic activities in vitro and in vivo using preclinical models. The findings suggest that both drugs might serve as therapeutic options for IF/TA.
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Affiliation(s)
- Li Li
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, 770 exington Ave., New York, NY 10065, USA.,Institute for Next Generation Healthcare, Icahn School of Medicine at Mount Sinai
| | - Ilana Greene
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA
| | - Benjamin Readhead
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, 770 exington Ave., New York, NY 10065, USA.,Institute for Next Generation Healthcare, Icahn School of Medicine at Mount Sinai
| | - Madhav C Menon
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA
| | - Brian A Kidd
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, 770 exington Ave., New York, NY 10065, USA.,Institute for Next Generation Healthcare, Icahn School of Medicine at Mount Sinai
| | - Andrew V Uzilov
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, 1255 5th Avenue, New York, NY 10029, USA
| | - Chengguo Wei
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA
| | - Nimrod Philippe
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA
| | - Bernd Schroppel
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA.,Section of Nephrology, University of Ulm, Albert-Einstein-Allee 23, Ulm, 89081 Germany
| | - John Cijiang He
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA
| | - Rong Chen
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, 1255 5th Avenue, New York, NY 10029, USA
| | - Joel T Dudley
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, 770 exington Ave., New York, NY 10065, USA.,Department of Health Policy and Research, Icahn School of Medicine at Mount Sinai, One Gustave L Levy Place, New York, NY 10029, USA.,Institute for Next Generation Healthcare, Icahn School of Medicine at Mount Sinai
| | - Barbara Murphy
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA
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10
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Regulation of anti-HLA antibody-dependent natural killer cell activation by immunosuppressive agents. Transplantation 2014; 97:294-300. [PMID: 24342979 DOI: 10.1097/01.tp.0000438636.52085.50] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND It was demonstrated that human natural killer (NK) cells, via antibody-dependent cellular cytotoxicity (ADCC)-like mechanism, increase IFNγ production after exposure to alloantigens. This finding was associated with an increased risk for antibody-mediated rejection (ABMR). Although the effects of various immunosuppressive drugs on T cells and B cells have been extensively studied, their effects on NK cells are less clear. This study reports the effect of immunosuppressive agents on antibody-mediated NK cell activation in vitro. METHODS Whole blood from normal individuals was incubated with irradiated peripheral blood mononuclear cells (PBMCs) pretreated with anti-HLA antibody+ sera (in vitro ADCC), with or without immunosuppressive agents. The %IFNγ+ and CD107a+ (degranulation marker) in CD56+ NK cells were enumerated by flow cytometry. RESULTS Cyclosporine A and tacrolimus significantly reduced IFNγ production in a dose-dependent manner (53%-83%), but showed minimal effect on degranulation (20%). Prednisone significantly reduced both IFNγ production and degranulation (50%-66% reduction at maximum therapeutic levels). Calcineurin inhibitors (CNIs) in combination with prednisone additively suppressed IFNγ production and degranulation. The effect of sirolimus or mycophenolate mofetil on NK cells was minimal. CONCLUSIONS These results suggest that potent suppressive effects of CNIs and prednisone on antibody-mediated NK cell activation may contribute to the reduction of ADCC in sensitized patients and possibly reduce the risk for ADCC-mediated ABMR. These further underscore the importance of medication compliance in prevention of ABMR and possibly chronic rejection, and suggest that ADCC-mediated injury may increase in strategies aimed at CNI or steroid minimization or avoidance.
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11
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Macedo C, Turnquist HR, Castillo-Rama M, Zahorchak AF, Shapiro R, Thomson AW, Metes D. Rapamycin augments human DC IL-12p70 and IL-27 secretion to promote allogeneic Type 1 polarization modulated by NK cells. Am J Transplant 2013; 13:2322-33. [PMID: 24034707 PMCID: PMC3842119 DOI: 10.1111/ajt.12351] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Revised: 04/29/2013] [Accepted: 05/18/2013] [Indexed: 01/25/2023]
Abstract
Mammalian target of rapamycin kinase inhibitor (mTORi) rapamycin (RAPA) use in transplantation can lead to inflammatory complications in some patients. Our goal was to better understand how mTORi-exposed human monocyte-derived dendritic cells (DC) stimulated with pro-inflammatory cytokines shape T cell allo-immunity. RAPA-conditioned-DC (RAPA-DC) displayed a more immature phenotype than untreated, control (CTRL)-DC. However, subsequent exposure of RAPA-DC to an inflammatory cytokine cocktail (ICC) plus IFN-γ induced a mature Type-1 promoting phenotype, consisting of elevated HLA-DR and co-stimulatory molecules, augmented IL-12p70 and IL-27 production, but decreased IL-10 secretion compared to CTRL-DC. Co-culture of mature (m)RAPA-DC with allogeneic peripheral blood mononuclear cells resulted in significantly increased Type-1 (IFN-γ) responses by T cells. Moreover, NK cells acted as innate modulators that conveyed activating cell-to-cell contact signals in addition to helper (IFN-γ) and/or regulatory (IL-10) soluble cytokines. We conclude that production of IL12-p70, IL-27 and low IL-10 by RAPA-DC allowed us to elucidate how these cytokines as well as NK-DC interaction shapes T cell allo-immunity. Thus, lack of inhibitory NK cell function during allo-specific T cell activation by human ICC + IFN-γ-stimulated RAPA-DC may represent an unwanted effector mechanism that may underlie RAPA-induced inflammatory events in transplant patients undergoing microbial infection or allograft rejection.
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Affiliation(s)
- C. Macedo
- Thomas E. Starzl Transplantation Institute, Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - H. R. Turnquist
- Thomas E. Starzl Transplantation Institute, Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA,Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - M. Castillo-Rama
- Thomas E. Starzl Transplantation Institute, Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - A. F. Zahorchak
- Thomas E. Starzl Transplantation Institute, Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - R. Shapiro
- Thomas E. Starzl Transplantation Institute, Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - A. W. Thomson
- Thomas E. Starzl Transplantation Institute, Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA,Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - D. Metes
- Thomas E. Starzl Transplantation Institute, Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA,Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA,Correspondence: Diana Metes, MD, Thomas E. Starzl Transplantation Institute, E 1549 Thomas E. Starzl Biomedical Science Tower, 200 Lothrop Street, Pittsburgh PA 15213 USA, Tel: + 1 (412) 648-3291; Fax: +1 (412) 624-6666,
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12
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Toyoda M, Ge S, Suviolahti E, Pichurin P, Shin B, Pao A, Vo A, Deer N, Aguiluz A, Karasyov A, Jordan S. IFNγ production by NK cells from HLA-sensitized patients after in vitro exposure to allo-antigens. Transpl Immunol 2012; 26:107-12. [DOI: 10.1016/j.trim.2011.11.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2011] [Revised: 11/02/2011] [Accepted: 11/02/2011] [Indexed: 11/29/2022]
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13
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Hirohashi T, Chase CM, Pelle PD, Sebastian D, Alessandrini A, Madsen JC, Russell PS, Colvin RB. A novel pathway of chronic allograft rejection mediated by NK cells and alloantibody. Am J Transplant 2012; 12:313-21. [PMID: 22070565 PMCID: PMC3667648 DOI: 10.1111/j.1600-6143.2011.03836.x] [Citation(s) in RCA: 167] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Chronic allograft vasculopathy (CAV) in murine heart allografts can be elicited by adoptive transfer of donor specific antibody (DSA) to class I MHC antigens and is independent of complement. Here we address the mechanism by which DSA causes CAV. B6.RAG1(-/-) or B6.RAG1(-/-)C3(-/-) (H-2(b)) mice received B10.BR (H-2(k)) heart allografts and repeated doses of IgG2a, IgG1 or F(ab')(2) fragments of IgG2a DSA (anti-H-2(k)). Intact DSA regularly elicited markedly stenotic CAV in recipients over 28 days. In contrast, depletion of NK cells with anti-NK1.1 reduced significantly DSA-induced CAV, as judged morphometrically. Recipients genetically deficient in mature NK cells (γ-chain knock out) also showed decreased severity of DSA-induced CAV. Direct NK reactivity to the graft was not necessary. F(ab')(2) DSA fragments, even at doses twofold higher than intact DSA, were inactive. Graft microvascular endothelial cells responded to DSA in vivo by increased expression of phospho-extracellular signal-regulated kinase (pERK), a response not elicited by F(ab')(2) DSA. We conclude that antibody mediates CAV through NK cells, by an Fc dependent manner. This new pathway adds to the possible mechanisms of chronic rejection and may relate to the recently described C4d-negative chronic antibody-mediated rejection in humans.
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Affiliation(s)
- T. Hirohashi
- Transplantation and Cardiac Surgical Divisions, Department of Surgery of the Harvard Medical School, Massachusetts General Hospital, Boston, MA
| | - C. M. Chase
- Transplantation and Cardiac Surgical Divisions, Department of Surgery of the Harvard Medical School, Massachusetts General Hospital, Boston, MA
| | - P. Della Pelle
- Department of Pathology, Massachusetts General Hospital, Boston, MA
| | - D. Sebastian
- Department of Pathology, Massachusetts General Hospital, Boston, MA
| | - A. Alessandrini
- Transplantation and Cardiac Surgical Divisions, Department of Surgery of the Harvard Medical School, Massachusetts General Hospital, Boston, MA
| | - J. C. Madsen
- Transplantation and Cardiac Surgical Divisions, Department of Surgery of the Harvard Medical School, Massachusetts General Hospital, Boston, MA
| | - P. S. Russell
- Transplantation and Cardiac Surgical Divisions, Department of Surgery of the Harvard Medical School, Massachusetts General Hospital, Boston, MA
| | - R. B. Colvin
- Department of Pathology, Massachusetts General Hospital, Boston, MA,Corresponding author: Robert B. Colvin,
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14
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Shrestha D, Szöllosi J, Jenei A. Bare lymphocyte syndrome: an opportunity to discover our immune system. Immunol Lett 2011; 141:147-57. [PMID: 22027563 DOI: 10.1016/j.imlet.2011.10.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Revised: 09/30/2011] [Accepted: 10/11/2011] [Indexed: 11/27/2022]
Abstract
Bare lymphocyte syndrome (BLS) is a rare immunodeficiency disorder manifested by the partial or complete disappearance of major histocompatibility complex (MHC) proteins from the surface of the cells. Based on this specific feature, it is categorized into three different types depending on which type of MHC protein is affected. These proteins are mainly involved in generating the effective immune responses by differentiating 'self' from 'non-self' antigens through a process referred to as antigen presentation. Investigations on BLS have immensely contributed to our understanding of the transcriptional regulation of these molecules and have led to the discovery of several important proteins of the antigen presentation pathway. Reviews on this subject consistently project type II BLS, MHC II deficiency as BLS syndrome, although literatures' document cases of other types of BLS too. Therefore, in this article, we have assembled information on the BLS syndrome to produce a systematic narration while emphasizing the importance of BLS system in studying various aspects of immune biology.
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Affiliation(s)
- Dilip Shrestha
- Department of Biophysics and Cell Biology, Medical and Health Science Center, University of Debrecen, Nagyerdei krt 98, Debrecen 4032, Hungary
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15
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Naesens M, Khatri P, Li L, Sigdel TK, Vitalone MJ, Chen R, Butte AJ, Salvatierra O, Sarwal MM. Progressive histological damage in renal allografts is associated with expression of innate and adaptive immunity genes. Kidney Int 2011; 80:1364-76. [PMID: 21881554 DOI: 10.1038/ki.2011.245] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The degree of progressive chronic histological damage is associated with long-term renal allograft survival. In order to identify promising molecular targets for timely intervention, we examined renal allograft protocol and indication biopsies from 120 low-risk pediatric and adolescent recipients by whole-genome microarray expression profiling. In data-driven analysis, we found a highly regulated pattern of adaptive and innate immune gene expression that correlated with established or ongoing histological chronic injury, and also with development of future chronic histological damage, even in histologically pristine kidneys. Hence, histologically unrecognized immunological injury at a molecular level sets the stage for the development of chronic tissue injury, while the same molecular response is accentuated during established and worsening chronic allograft damage. Irrespective of the hypothesized immune or nonimmune trigger for chronic allograft injury, a highly orchestrated regulation of innate and adaptive immune responses was found in the graft at the molecular level. This occurred months before histologic lesions appear, and quantitatively below the diagnostic threshold of classic T-cell or antibody-mediated rejection. Thus, measurement of specific immune gene expression in protocol biopsies may be warranted to predict the development of subsequent chronic injury in histologically quiescent grafts and as a means to titrate immunosuppressive therapy.
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Affiliation(s)
- Maarten Naesens
- Division of Nephrology, Department of Pediatrics, Stanford University School of Medicine, Stanford, California, USA
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16
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Nowak I, Majorczyk E, Wiśniewski A, Pawlik A, Magott-Procelewska M, Passowicz-Muszyńska E, Malejczyk J, Płoski R, Giebel S, Barcz E, Zoń-Giebel A, Malinowski A, Tchórzewski H, Chlebicki A, Łuszczek W, Kurpisz M, Gryboś M, Wilczyński J, Wiland P, Senitzer D, Sun JY, Jankowska R, Klinger M, Kuśnierczyk P. Does the KIR2DS5 gene protect from some human diseases? PLoS One 2010; 5:e12381. [PMID: 20865034 PMCID: PMC2928722 DOI: 10.1371/journal.pone.0012381] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Accepted: 07/30/2010] [Indexed: 11/18/2022] Open
Abstract
Background KIR2DS5 gene encodes an activating natural killer cell receptor whose ligand is not known. It was recently reported to affect the outcome of hematopoietic stem cell transplantation. Methodology/Principal Findings In our studies on KIR2DS5 gene associations with human diseases, we compared the frequencies of this gene in patients and relevant controls. Typing for KIR2DS5 gene was performed by either individual or multiplex polymerase chain reactions which, when compared in the same samples, gave concordant results. We noted an apparently protective effect of KIR2DS5 gene presence in several clinical conditions, but not in others. Namely, this effect was observed in ankylosing spondylitis (p = 0.003, odds ratio [OR] = 0.47, confidence interval [CI] = 0.28–0.79), endometriosis (p = 0.03, OR = 0.25, CI = 0.07–0.82) and acute rejection of kidney graft (p = 0.0056, OR = 0.44, CI = 0.24–0.80), but not in non-small-cell lung carcinoma, rheumatoid arthritis, spontaneous abortion, or leukemia (all p>0.05). In addition, the simultaneous presence of KIR2DS5 gene and HLA-C C1 allotype exhibited an even stronger protective effect on ankylosing spondylitis (p = 0.0003, OR = 0.35, CI = 0.19–0.65), whereas a lack of KIR2DS5 and the presence of the HLA-C C2 allotype was associated with ankylosing spondylitis (p = 0.0017, OR = 1.92, CI = 1.28–2.89), whereas a lack of KIR2DS5 and presence of C1 allotype was associated with rheumatoid arthritis (p = 0.005, OR = 1.47, CI = 1.13–1.92). The presence of both KIR2DS5 and C1 seemed to protect from acute kidney graft rejection (p = 0.017, OR = 0.47, CI = 0.25–0.89), whereas lack of KIR2DS5 and presence of C2 seemed to favor rejection (p = 0.0015, OR = 2.13, CI = 1.34–3.37). Conclusions/Significance Our results suggest that KIR2DS5 may protect from endometriosis, ankylosing spondylitis, and acute rejection of kidney graft.
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Affiliation(s)
- Izabela Nowak
- Department of Clinical Immunology, Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wrocław, Poland
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17
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Roussel M, Benard C, Ly-Sunnaram B, Fest T. Refining the white blood cell differential: The first flow cytometry routine application. Cytometry A 2010; 77:552-63. [DOI: 10.1002/cyto.a.20893] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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18
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Matz M, Weber U, Mashreghi MF, Lorkowski C, Ladhoff J, Kramer S, Neumayer HH, Budde K. Effects of the new immunosuppressive agent AEB071 on human immune cells. Nephrol Dial Transplant 2010; 25:2159-67. [PMID: 20100729 DOI: 10.1093/ndt/gfp775] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
UNLABELLED BACKGROUND. The novel immunosuppressive agent AEB071 is currently being evaluated for its capability to prevent rejection after kidney transplantation as a potential adjunct to calcineurin inhibitor-based regimen. AEB071 is a selective protein kinase C inhibitor and has been shown to be well tolerated in humans. We here present extensive in vitro studies that contribute to the understanding of AEB071 effects on human lymphocyte, natural killer (NK) cell and dendritic cell (DC) action. METHODS The impact of AEB071 on several T-cell activation and costimulatory markers was assessed. Furthermore, assays were performed to study the effect on T-cell proliferation and intracellular cytokine production. Additionally, the effect of AEB071 on DC maturation and their capacity to stimulate allogeneic T-cells was examined. Also, an evaluation of AEB071 effects on the lytic activity of human NK cells was performed. RESULTS We were able to show that T-cell proliferation and cytokine production rates are significantly reduced after AEB071 administration. Also, mitogen-induced T-cell activation characterized by expression levels of surface markers could be significantly inhibited. In contrast, the T-cell stimulatory capacity of AEB071-treated mature monocyte-derived DC (Mo-DC) is not reduced, and AEB071 administration does not prevent lipopolysaccharide (LPS)-induced Mo-DC maturation. It could be demonstrated that AEB071 significantly inhibited the cytotoxic activity of NK cells. CONCLUSIONS The promising immunosuppressive agent AEB071 has a strong impact on T-cell activation, proliferation and cytokine production as well as NK cell activity, but not DC maturation in vitro, and therefore, seems to function T-cell and NK cell specific via protein kinase C (PKC) inhibition.
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Affiliation(s)
- Mareen Matz
- Department of Nephrology, Universitätsmedizin Charité Campus Mitte, Charitéplatz 1, 10117 Berlin, Germany.
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19
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Gerrits JH, van de Wetering J, Drabbels JJ, IJzermans JNM, Claas FHJ, Weimar W, van Besouw NM. Non-HLA T-cell reactivity during the first year after HLA-identical living-related kidney transplantation. Clin Transplant 2009; 23:740-7. [PMID: 19563488 DOI: 10.1111/j.1399-0012.2009.01014.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND It has been reported that donor-reactive T-cell responses may decrease during the first year after HLA-mismatched organ transplantation. We wondered whether donor-reactive T-cell responses directed to minor histocompatibility antigens (mHAgs) or other non-HLA antigens also decrease after HLA-identical living-related (LR) kidney transplantation. METHODS We studied donor-reactive T-cell responses by IFN-gamma and granzyme B (GrB) Elispot assays in 15 HLA-identical LR kidney transplant recipients before, six months and one yr after transplantation. Third-party reactivity was used as control. Patient and donor peripheral blood mononuclear cells were typed for 11 known mHAgs. RESULTS During the study period, 60% and 36% of the patients demonstrated donor-reactive IFN-gamma and GrB producing cells (pc), respectively. The number of donor-reactive IFN-gamma and GrB pc was significantly lower than the number of third-party reactive IFN-gamma and GrB pc. After transplantation, donor-reactivity and third-party reactivity were comparable to pre-transplant values. No relation was found in mHAg mismatches between donor and recipient and donor-reactive T-cell response. CONCLUSIONS Donor-reactivity could be detected before and after HLA-identical LR kidney transplantation, but was not related with the number of mHAg mismatches, and did not decrease after transplantation.
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Affiliation(s)
- Jeroen H Gerrits
- Department of Internal Medicine-Transplantation, Erasmus Medical Center-University Medical Center Rotterdam, Rotterdam, The Netherlands
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20
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Abstract
With recent advances in immunology and a growing understanding of transplantation biology, the development of reliable assays that may be used for identification and prediction of the current state of an immune response (rejection and tolerance) are urgently needed to allow us to predict the development of immunologic graft injury, individualize immunosuppression, rationally minimize immunosuppressive drug toxicity, promote a better understanding of the mechanisms underlying stable graft acceptance, and aid in the design of tolerance-inducing clinical transplantation trials. Microarrays can provide nonbiased, simultaneous global expression patterns for more than 40,000 human genes across different experiments. High throughput microarray technology offers a means to study disease-specific transcriptional changes in tissue biopsy, peripheral blood, and biofluids.
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Jones BJ, McTaggart SJ. Immunosuppression by mesenchymal stromal cells: from culture to clinic. Exp Hematol 2008; 36:733-41. [PMID: 18474304 DOI: 10.1016/j.exphem.2008.03.006] [Citation(s) in RCA: 183] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2007] [Revised: 02/25/2008] [Accepted: 03/11/2008] [Indexed: 12/12/2022]
Abstract
Extensive in vitro studies have shown that multipotent mesenchymal stromal cells (MSC) can exert profound immunosuppressive effects via modulation of both cellular and innate immune pathways. Their ability to be readily isolated from a number of tissues and expanded ex vivo makes them attractive candidates for systemic immunosuppressive therapy. In this article, we will review recent experimental data on the mechanisms by which MSC inhibit the alloproliferative response and the clinical relevance for their potential use in hematopoietic stem cell transplantation, solid organ transplantation, and treatment of autoimmune diseases. While in vitro data consistently demonstrate the immunosuppressive capability of MSC, current studies in animals and humans suggest that MSC are less effective in producing systemic immunosuppression. Further mechanistic studies and randomized controlled trials using standardized cell populations are needed to define the optimal conditions for the use of MSC as immunotherapy.
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Affiliation(s)
- Ben J Jones
- Solid Organ Transplant Team, Mater Medical Research Institute, University of Queensland, Brisbane, Australia
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Gonzalez A, Meenagh A, Sleator C, Middleton D. Investigation of killer cell immunoglobulin-like receptor (KIR) gene diversity: KIR2DL2, KIR2DL5 and KIR2DS5. ACTA ACUST UNITED AC 2008; 72:11-20. [PMID: 18498296 DOI: 10.1111/j.1399-0039.2008.01050.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Human killer cell immunoglobulin-like receptor (KIR) genes are important for restraining natural killer cytotoxicity toward cells with autologous human leukocyte antigen (HLA) while targeting cells lacking or expressing low levels of self-HLA molecules. KIR gene content and alleles vary across individual genomes and populations, requiring specialized laboratory tools for their characterization. Here, we detail methods based on sequence-specific polymerase chain reaction amplification and oligonucleotide probe hybridization to identify alleles of KIR2DL2, KIR2DL5A, KIR2DL5B and KIR2DS5. Allele frequencies for a Northern Irish population of 354 individuals typed with this system are given, along with results from 132 cell lines from the International Histocompatibility Workshop that cover many world populations. This information complements published reports by our laboratory for allele-level typing of other KIR members, totaling 12 of the 17 known genes. These methods are allowing us to characterize KIR haplotypes in our population.
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Affiliation(s)
- A Gonzalez
- Northern Ireland Regional Histocompatibility and Immunogenetics Laboratory, City Hospital, Belfast, UK.
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23
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Agrawal S, Tripathi P, Naik S. Roles and mechanism of natural killer cells in clinical and experimental transplantation. Expert Rev Clin Immunol 2008; 4:79-91. [DOI: 10.1586/1744666x.4.1.79] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
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24
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Affiliation(s)
- Peter S Heeger
- Department of Medicine, Mount Sinai School of Medicine, New York, NY 10025, USA.
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