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Hanks J, Girard C, Sehgal S. Acute rejection post lung transplant. Curr Opin Pulm Med 2024; 30:391-397. [PMID: 38656281 DOI: 10.1097/mcp.0000000000001078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
PURPOSE OF REVIEW To review what is currently known about the pathogenesis, diagnosis, treatment, and prevention of acute rejection (AR) in lung transplantation. RECENT FINDINGS Epigenomic and transcriptomic methods are gaining traction as tools for earlier detection of AR, which still remains primarily a histopathologic diagnosis. SUMMARY Acute rejection is a common cause of early posttransplant lung graft dysfunction and increases the risk of chronic rejection. Detection and diagnosis of AR is primarily based on histopathology, but noninvasive molecular methods are undergoing investigation. Two subtypes of AR exist: acute cellular rejection (ACR) and antibody-mediated rejection (AMR). Both can have varied clinical presentation, ranging from asymptomatic to fulminant ARDS, and can present simultaneously. Diagnosis of ACR requires transbronchial biopsy; AMR requires the additional measuring of circulating donor-specific antibody (DSA) levels. First-line treatment in ACR is increased immunosuppression (pulse-dose or tapered dose glucocorticoids); refractory cases may need antibody-based lymphodepletion therapy. First line treatment in AMR focuses on circulating DSA removal with B and plasma cell depletion; plasmapheresis, intravenous human immunoglobulin (IVIG), bortezomib, and rituximab are often employed.
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Affiliation(s)
- Justin Hanks
- Department of Pulmonary Medicine, Integrated Hospital Institute, Cleveland Clinic Foundation, Cleveland, Ohio, USA
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2
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Mostkowska A, Rousseau G, Raynal NJM. Repurposing of rituximab biosimilars to treat B cell mediated autoimmune diseases. FASEB J 2024; 38:e23536. [PMID: 38470360 DOI: 10.1096/fj.202302259rr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 02/12/2024] [Accepted: 02/21/2024] [Indexed: 03/13/2024]
Abstract
Rituximab, the first monoclonal antibody approved for the treatment of lymphoma, eventually became one of the most popular and versatile drugs ever in terms of clinical application and revenue. Since its patent expiration, and consequently, the loss of exclusivity of the original biologic, its repurposing as an off-label drug has increased dramatically, propelled by the development and commercialization of its many biosimilars. Currently, rituximab is prescribed worldwide to treat a vast range of autoimmune diseases mediated by B cells. Here, we present a comprehensive overview of rituximab repurposing in 115 autoimmune diseases across 17 medical specialties, sourced from over 1530 publications. Our work highlights the extent of its off-label use and clinical benefits, underlining the success of rituximab repurposing for both common and orphan immune-related diseases. We discuss the scientific mechanism associated with its clinical efficacy and provide additional indications for which rituximab could be investigated. Our study presents rituximab as a flagship example of drug repurposing owing to its central role in targeting cluster of differentiate 20 positive (CD20) B cells in 115 autoimmune diseases.
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Affiliation(s)
- Agata Mostkowska
- Department of Pharmacology and Physiology, Faculty of Medicine, University of Montreal, Montreal, Quebec, Canada
| | - Guy Rousseau
- Department of Pharmacology and Physiology, Faculty of Medicine, University of Montreal, Montreal, Quebec, Canada
| | - Noël J-M Raynal
- Department of Pharmacology and Physiology, Faculty of Medicine, University of Montreal, Montreal, Quebec, Canada
- Centre de recherche du CHU Sainte-Justine, University of Montreal, Montreal, Quebec, Canada
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Wei X, Chang Y, Zhu X, Hu X, Guo R, Zhang Y, Ma X, Han Y, Wang Y, Qiu H, Wu X, Wu D. The impact of pre-transplant anti-HLA antibodies in transplants from HLA-identical sibling donors: A multicenter study. HLA 2024; 103:e15286. [PMID: 38018476 DOI: 10.1111/tan.15286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 08/29/2023] [Accepted: 10/27/2023] [Indexed: 11/30/2023]
Abstract
Few studies have performed comparative analysis of the outcome of hematopoietic stem cell transplantation from HLA-identical sibling donors (ISD-HSCT) in patients with or without anti-HLA Abs. In this study we retrospectively collected data from a multicenter study to analyze the distribution and impact of the pre-existing anti-HLA Abs in ISD-HSCT. Among 402 recipients, 111 were positive for anti-HLA Abs. Gender, time from diagnosis to transplantation and distribution of primary disease might be risk factors for the occurrence of anti-HLA Abs. We found that patients with anti-HLA Abs had delayed neutrophil engraftment and were more vulnerable to experience Cytomegalovirus (CMV) reactivation. The presence of anti-HLA Abs was proved to be an independent risk factor for neutrophil engraftment (HR 1.42 95% CI 1.13-1.80, p = 0.003) and CMV reactivation (HR 2.03 95% CI 1.19-3.46, p = 0.009). We found that anti-HLA Abs have a negative impact on the prognosis in the early period after transplantation from sibling donors and anti-HLA Abs was also an independent risk factor for the overall survival (OS) at 180 days (HR 2.32, 95% CI 1.03-5.27, p = 0.042) among female recipients. In conclusion, anti-HLA Abs have a negative impact on the prognosis early after ISD-HSCT.
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Affiliation(s)
- Xiya Wei
- Department of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, Suzhou, China
- Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Yingjun Chang
- Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Peking University People's Hospital, Peking University Institute of Hematology, National Clinical Research Center for Hematologic Disease, Research Unit of Key Technique for Diagnosis and Treatments of Hematologic Malignancies, Beijing, China
| | - Xiaoyu Zhu
- Department Hematology, University Scientific & Technology China, Affiliated Hospital USTC 1, Hefei, China
| | - Xiaoxia Hu
- Shanghai Institute of Hematology, State Key Laboratory of Medical Genomics, National Research Center for Translational Medicine at Shanghai, Ruijin Hospital, Shanghai Jiao Tong University of Medicine, Shanghai, China
| | - Rong Guo
- Department of Hematology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yanming Zhang
- Department of Hematology, Huai'an Second Peoples Hospital, Huai'an, China
| | - Xiao Ma
- Department of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, Suzhou, China
- Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Yue Han
- Department of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, Suzhou, China
- Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Ying Wang
- Department of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, Suzhou, China
- Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Huiying Qiu
- Department of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, Suzhou, China
- Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Xiaojin Wu
- Department of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, Suzhou, China
- Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Depei Wu
- Department of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, Suzhou, China
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Trindade AJ, Chapin KC, Gannon WD, Hoy H, Demarest CT, Lambright ES, McPherson KA, Norfolk SG, Robbins IM, Bacchetta M, Erasmus DB, Shaver CM. Clinical course of SARS-CoV-2 infection and recovery in lung transplant recipients. Transpl Infect Dis 2022; 24:e13967. [PMID: 36271645 PMCID: PMC9780187 DOI: 10.1111/tid.13967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 08/03/2022] [Accepted: 08/26/2022] [Indexed: 12/25/2022]
Abstract
BACKGROUND Reports on outcomes following severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection in lung transplant recipients remain limited. METHODS We performed a single-center, observational study of outcomes in lung transplant recipients diagnosed with SARS-CoV-2 between 5/1/2020 and 3/15/2022 that were followed for a median of 123 days. We analyzed changes in spirometry, acute lung allograft dysfunction (ALAD) incidence, hospitalization, mechanical ventilation needs, secondary infection, and survival. RESULTS In our cohort of 336 patients, 103 developed coronavirus disease (COVID) (27 pre-Delta, 20 Delta, and 56 Omicron-era). Twenty-five patients (24%) required hospitalization and 10 patients ultimately died (10%). Among 85 survivors who completed ambulatory spirometry, COVID-19 did not alter change in forced expiratory volume in 1 s (FEV1 ) or forced vital capacity (FVC) over time compared to the preceding 6 months. The pre-COVID FEV1 change was -0.05 ml/day (IQR -0.50 to 0.60) compared to -0.20 ml/day (IQR -1.40 to 0.70) post-COVID (p = .16). The pre-COVID change in FVC was 0.20 ml/day (IQR -0.60 to 0.70) compared to 0.05 ml/day (IQR -1.00 to 1.10) post-COVID (p = .76). Although the cohort overall had stable lung function, 33 patients (39%) developed ALAD or accelerated chronic lung allograft dysfunction (FEV1 decline >10% from pre-COVID baseline). Nine patients (35%) with ALAD recovered lung function. Within 3 months of acute COVID infection, 18 patients (17%) developed secondary infections, the majority being bacterial pneumonia. Finally, vaccination with at least two doses of mRNA vaccine was not associated with improved outcomes. CONCLUSIONS This study describes the natural history of SARS-CoV-2 infection in a large cohort of lung transplant recipients. Although one third of patients develop ALAD requiring augmented immunosuppression, infection with SARS-CoV-2 is not associated with worsening lung function.
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Affiliation(s)
- Anil J. Trindade
- Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Kaitlyn C. Chapin
- Vanderbilt Transplant Center, Vanderbilt University Medical Center, Nashville, TN
| | - Whitney D. Gannon
- Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Haley Hoy
- Vanderbilt Transplant Center, Vanderbilt University Medical Center, Nashville, TN
| | - Caitlin T. Demarest
- Department of Thoracic Surgery, Vanderbilt University Medical Center, Nashville, TN
| | - Eric S. Lambright
- Department of Thoracic Surgery, Vanderbilt University Medical Center, Nashville, TN
| | - Katie A. McPherson
- Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Stephanie G. Norfolk
- Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Ivan M. Robbins
- Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Matthew Bacchetta
- Department of Thoracic Surgery, Vanderbilt University Medical Center, Nashville, TN
- Department of Cardiac Surgery, Vanderbilt University Medical Center, Nashville, TN
- Department of Biomedical Engineering, Vanderbilt University Medical Center, Nashville, TN
| | - David B. Erasmus
- Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Ciara M. Shaver
- Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
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Werlein C, Seidel A, Warnecke G, Gottlieb J, Laenger F, Jonigk D. Lung Transplant Pathology: An Overview on Current Entities and Procedures. Surg Pathol Clin 2020; 13:119-140. [PMID: 32005428 DOI: 10.1016/j.path.2019.11.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Alloimmune reactions are, besides various infections, the major cause for impaired lung allograft function following transplant. Acute cellular rejection is not only a major trigger of acute allograft failure but also contributes to development of chronic lung allograft dysfunction. Analogous to other solid organ transplants, acute antibody-mediated rejection has become a recognized entity in lung transplant pathology. Adequate sensitivity and specificity in the diagnosis of alloimmune reactions in the lung can only be achieved by synoptic analysis of histopathologic, clinical, and radiological findings together with serologic and microbiologic findings.
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Affiliation(s)
- Christopher Werlein
- Institute for Pathology, OE 5110, Hannover Medical School, Carl-Neuberg-Str. 1, Hannover 30625, Germany.
| | - Allison Seidel
- Institute for Pathology, OE 5110, Hannover Medical School, Carl-Neuberg-Str. 1, Hannover 30625, Germany; Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH)
| | - Gregor Warnecke
- Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH); Department of Cardiac, Thoracic, Transplantation and Vascular Surgery, OE6210, Hannover Medical School, Carl-Neuberg-Str. 1, Hannover 30625, Germany
| | - Jens Gottlieb
- Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH); Department of Pneumology, OE6210, Hannover Medical School, Carl-Neuberg-Str. 1, Hannover 30625, Germany
| | - Florian Laenger
- Institute for Pathology, OE 5110, Hannover Medical School, Carl-Neuberg-Str. 1, Hannover 30625, Germany; Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH)
| | - Danny Jonigk
- Institute for Pathology, OE 5110, Hannover Medical School, Carl-Neuberg-Str. 1, Hannover 30625, Germany; Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH)
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Wohlschlaeger J, Laenger F, Gottlieb J, Hager T, Seidel A, Jonigk D. Lungentransplantation. DER PATHOLOGE 2019; 40:281-291. [DOI: 10.1007/s00292-019-0598-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Abstract
Despite induction immunosuppression and the use of aggressive maintenance immunosuppressive regimens, acute allograft rejection following lung transplantation is still a problem with important diagnostic and therapeutic challenges. As well as causing early graft loss and mortality, acute rejection also initiates the chronic alloimmune responses and airway-centred inflammation that predispose to bronchiolitis obliterans syndrome (BOS), also known as chronic lung allograft dysfunction (CLAD), which is a major source of morbidity and mortality after lung transplantation. Cellular responses to human leukocyte antigens (HLAs) on the allograft have traditionally been considered the main mechanism of acute rejection, but the influence of humoral immunity is increasingly recognised. As with other several other solid organ transplants, antibody-mediated rejection (AMR) is now a well-accepted and distinct clinical entity in lung transplantation. While acute cellular rejection (ACR) has defined histopathological criteria, transbronchial biopsy is less useful in AMR and its diagnosis is complicated by challenges in the measurement of antibodies directed against donor HLA, and a determination of their significance. Increasing awareness of the importance of non-HLA antigens further clouds this issue. Here, we review the pathophysiology, diagnosis, clinical presentation and treatment of ACR and AMR in lung transplantation, and discuss future potential biomarkers of both processes that may forward our understanding of these conditions.
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Affiliation(s)
- Mark Benzimra
- Heart and Lung Transplant Unit, St Vincent's Hospital, Sydney, Australia
| | - Greg L Calligaro
- Division of Pulmonology, Department of Medicine, Groote Schuur Hospital, Cape Town, South Africa
| | - Allan R Glanville
- Heart and Lung Transplant Unit, St Vincent's Hospital, Sydney, Australia
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Fakhro M, Broberg E, Algotsson L, Hansson L, Koul B, Gustafsson R, Wierup P, Ingemansson R, Lindstedt S. Double lung, unlike single lung transplantation might provide a protective effect on mortality and bronchiolitis obliterans syndrome. J Cardiothorac Surg 2017; 12:100. [PMID: 29178919 PMCID: PMC5702105 DOI: 10.1186/s13019-017-0666-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 11/16/2017] [Indexed: 12/19/2022] Open
Abstract
Background Survival after lung transplantation (LTx) is often limited by bronchiolitis obliterans syndrome (BOS). Method Survey of 278 recipients who underwent LTx. The endpoint used was BOS (BOS grade ≥ 2), death or Re-lung transplantation (Re-LTx) assessed by competing risk regression analyses. Results The incidence of BOS grade ≥ 2 among double LTx (DLTx) recipients was 16 ± 3% at 5 years, 30 ± 4% at 10 years, and 37 ± 5% at 20 years, compared to single LTx (SLTx) recipients whose corresponding incidence of BOS grade ≥ 2 was 11 ± 3%, 20 ± 4%, and 24 ± 5% at 5, 10, and 20 years, respectively (p > 0. 05). The incidence of BOS grade ≥ 2 by major indications ranked in descending order: other, PF, CF, COPD, PH and AAT1 (p < 0. 05). The mortality rate by major indication ranked in descending order: COPD, PH, AAT1, PF, Other and CF (p < 0. 05). Conclusion No differences were seen in the incidence of BOS grade ≥ 2 regarding type of transplant, however, DLTx recipients showed a better chance of survival despite developing BOS compared to SLTx recipients. The highest incidence of BOS was seen among CF, PF, COPD, PH, and AAT1 recipients in descending order, however, CF and PF recipients showed a better chance of survival despite developing BOS compared to COPD, PH, and AAT1 recipients.
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Affiliation(s)
- Mohammed Fakhro
- Department of Cardiothoracic Surgery, Skåne University Hospital, Lund University, Lund, Sweden.
| | - Ellen Broberg
- Department of Thoracic Intensive Care and Anesthesia, Skåne University Hospital, Lund University, Lund, Sweden
| | - Lars Algotsson
- Department of Thoracic Intensive Care and Anesthesia, Skåne University Hospital, Lund University, Lund, Sweden
| | - Lennart Hansson
- Department of Pulmonary Medicine, Skåne University Hospital, Lund University, Lund, Sweden
| | - Bansi Koul
- Department of Cardiothoracic Surgery, Skåne University Hospital, Lund University, Lund, Sweden
| | - Ronny Gustafsson
- Department of Cardiothoracic Surgery, Skåne University Hospital, Lund University, Lund, Sweden
| | - Per Wierup
- Department of Cardiothoracic Surgery, Skåne University Hospital, Lund University, Lund, Sweden
| | - Richard Ingemansson
- Department of Cardiothoracic Surgery, Skåne University Hospital, Lund University, Lund, Sweden
| | - Sandra Lindstedt
- Department of Cardiothoracic Surgery, Skåne University Hospital, Lund University, Lund, Sweden
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Snell G, Reed A, Stern M, Hadjiliadis D. The evolution of lung transplantation for cystic fibrosis: A 2017 update. J Cyst Fibros 2017; 16:553-564. [DOI: 10.1016/j.jcf.2017.06.008] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 06/29/2017] [Accepted: 06/29/2017] [Indexed: 02/08/2023]
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Modulation of Donor-Specific Antibody Production After Organ Transplantation by Valproic Acid: A Histone Deacetylase Inhibitor. Transplantation 2017; 100:2342-2351. [PMID: 27140514 DOI: 10.1097/tp.0000000000001197] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND Antibody-mediated rejection, mediated by donor-specific antibodies, is emerging as a leading cause for allograft dysfunction in organ transplantation. Histone deacetylase inhibitors (HDACi) have potential immunosuppressive action, but their effects on antibody-mediated rejection and B cell function in organ transplantation have not been fully explored. METHODS The impacts of valproic acid (VPA), an HDACi, on isolated murine B cell proliferation, apoptosis, class switch recombination (CSR), differentiation, and secretion of immunoglobulin were investigated in vitro and in vivo. Molecular mechanisms were also explored by analyzing the expression of the activation-induced cytidinedeaminase, B lymphocyte-induced maturation protein-1 (Blimp-1/Pridm1), X-box-binding protein 1 and interferon-regulatory factor 4. Mouse cardiac transplant model was used to evaluate the regulatory effects of VPA on B cell response in vivo. RESULTS Valproic acid significantly inhibited B cell CSR, plasma cell differentiation, thereby reduced antibody generation in a dose-dependent manner without altering B cell proliferation and apoptosis in vitro and in vivo. Activation-induced cytidinedeaminase, Blimp-1/Pridm1 and X-box-binding protein 1 expression were repressed by VPA treatment in a dose-dependent manner, whereas no obvious changes were observed on interferon-regulatory factor 4 expression. Although VPA alone did not prolong the graft medium survival time after murine heart transplantation, the low levels of donor-specific antibody, especially IgG in serum and the less numbers of plasma cells in the spleen were observed in VPA-treated mice. CONCLUSIONS Valproic acid inhibited B cell CSR and plasma cell differentiation in vitro and in nitrophenyl-chicken gamma globulin-immunized and heart transplant recipient mice. HDACi might be a therapeutic agent targeting B cell response after organ transplantation.
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Low proportion of follicular regulatory T cell in renal transplant patients with chronic antibody-mediated rejection. Sci Rep 2017; 7:1322. [PMID: 28465534 PMCID: PMC5431051 DOI: 10.1038/s41598-017-01625-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Accepted: 03/30/2017] [Indexed: 11/13/2022] Open
Abstract
Follicular regulatory T (Tfr) cell can effectively regulate humoral immunity, but its function and mechanism in antibody-mediated rejection (AMR) after organ transplantation remains unclear. Here we detected follicular helper T (Tfh) cell subsets in 88 renal transplant patients with chronic renal allograft dysfunction (40 with AMR and 48 without AMR). The ratio of Tfr cells in renal graft tissues and peripheral blood of AMR patients significantly decreased, while the ratio of IL-21-producing Tfh cells (Tfh2 and Tfh17) significantly increased, compared to non-AMR patients. When tested in functional assays, Tfr cells from both AMR and non-AMR patients exerted equivalent inhibitory function. Tfr cell transplantation or CTLA-4 virus transfection could significantly inhibit IL-21 secretion from Tfh cells of these patients, further suppress the proliferation and differentiation of B cells. CTLA-4 blocking, IL-10 and TGF-β neutralization could partially weaken such inhibitory effect of Tfr cells. Besides, our study found that sirolimus reduced the ratio of Tfr cells, while cyclosporine and tacrolimus had no significant effect on Tfr cells. In a word, renal transplant patients with AMR have low proportion of Tfr cells but these cell exerted normal function.
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Diagnostic value of plasma and bronchoalveolar lavage samples in acute lung allograft rejection: differential cytology. Respir Res 2016; 17:74. [PMID: 27323950 PMCID: PMC4915079 DOI: 10.1186/s12931-016-0391-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 06/13/2016] [Indexed: 12/21/2022] Open
Abstract
Diagnosis of acute lung allograft rejection is currently based on transbronchial lung biopsies. Additional methods to detect acute allograft dysfunction derived from plasma and bronchoalveolar lavage samples might facilitate diagnosis and ultimately improve allograft survival. This review article gives an overview of the cell profiles of bronchoalveolar lavage and plasma samples during acute lung allograft rejection. The value of these cells and changes within the pattern of differential cytology to support the diagnosis of acute lung allograft rejection is discussed. Current findings on the topic are highlighted and trends for future research are identified.
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Troxell ML, Lanciault C. Practical Applications in Immunohistochemistry: Evaluation of Rejection and Infection in Organ Transplantation. Arch Pathol Lab Med 2016; 140:910-25. [PMID: 26759930 DOI: 10.5858/arpa.2015-0275-cp] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
CONTEXT -Immunohistochemical analysis of tissue biopsy specimens is a crucial tool in diagnosis of both rejection and infection in patients with solid organ transplants. In the past 15 years, the concept of antibody-mediated rejection has been refined, and diagnostic criteria have been codified in renal, heart, pancreas, and lung allografts (with studies ongoing in liver, small intestine, and composite grafts), all of which include immunoanalysis for the complement split product C4d. OBJECTIVES -To review the general concepts of C4d biology and immunoanalysis, followed by organ-allograft-specific data, and interpretative nuances for kidney, pancreas, and heart, with discussion of early literature for lung and liver biopsies. Additionally, practical applications and limitations of immunostains for infectious organisms (Polyomavirus, Adenoviridae [adenovirus], and the herpes virus family, including Herpes simplex virus, Cytomegalovirus, Human herpes virus 8, and Epstein-Barr virus) are reviewed in the context of transplant recipients. DATA SOURCES -Our experience and published primary and review literature. CONCLUSIONS -Immunohistochemistry continues to have an important role in transplant pathology, most notably C4d staining in assessment of antibody-mediated rejection and assessment of viral pathogens in tissue. In all facets of transplant pathology, correlation of morphology with special studies and clinical data is critical, as is close communication with the transplant team.
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Affiliation(s)
| | - Christian Lanciault
- From the Department of Pathology, Oregon Health & Science University, Portland
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14
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Lung Transplantation. PATHOLOGY OF TRANSPLANTATION 2016. [PMCID: PMC7153460 DOI: 10.1007/978-3-319-29683-8_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The therapeutic options for patients with advanced pulmonary parenchymal or vascular disorders are currently limited. Lung transplantation remains one of the few viable interventions, but on account of the insufficient donor pool only a minority of these patients actually undergo the procedure each year. Following transplantation there are a number of early and late allograft complications such as primary graft dysfunction, allograft rejection, infection, post-transplant lymphoproliferative disorder and late injury that is now classified as chronic lung allograft dysfunction. The pathologist plays an essential role in the diagnosis and classification of these myriad complications. Although the transplant procedures are performed in selected centers patients typically return to their local centers. When complications arise it is often the responsibility of the local pathologist to evaluate specimens. Therefore familiarity with the pathology of lung transplantation is important.
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