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Humoral rejection

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https://www.readbyqxmd.com/read/29789580/the-effects-of-anti-lap-monoclonal-antibody-down-regulation-of-cd4-lap-t-cells-on-allogeneic-corneal-transplantation-in-mice
#1
Shang Li, Hongshuang Lu, Ruti Sella, Wei Zhang, Hongwei Dong, Chungang Guo, Natalie A Afshari, Zhiqiang Pan, Ying Jie
CD4+latency-associated peptide (LAP)+ T cells are a newly discovered T cell subset with suppressive function on immune responses. In this study, we investigate the role of CD4+LAP+ T cells on mice corneal allograft survival by down-regulating their expression using anti-LAP mAb. We show that a blockage of LAP leads to a decrease in the percentage of T cells expressing CD4+Foxp3+, CD4+GARP+, CD4+LAP+ and CD4+IL-10+ in the lymph nodes and spleens of mice undergoing orthotopic penetrating transplantation of corneal allograft, without affecting corneal graft survival...
May 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29754764/monitoring-of-early-humoral-immunity-to-identify-lung-recipients-at-risk-for-development-of-serious-infections-a-multicenter-prospective-study
#2
Elizabeth Sarmiento, Jose Cifrian, Leticia Calahorra, Carles Bravo, Sonia Lopez, Rosalia Laporta, Piedad Ussetti, Amparo Sole, Carmen Morales, Alicia de Pablos, Maria Jaramillo, Ikram Ezzahouri, Sandra García, Joaquin Navarro, Marcos Lopez-Hoyos, Javier Carbone
BACKGROUND: Infection is still a leading cause of death during the first year after lung transplantation. We performed a multicenter study among teaching hospitals to assess monitoring of early humoral immunity as a means of identifying lung recipients at risk of serious infections. METHODS: We prospectively analyzed 82 adult lung recipients at 5 centers in Spain. Data were collected before transplantation and at 7 and 30 days after transplantation. Biomarkers included IgG, IgM, IgA, complement factors C3 and C4, titers of antibodies to pneumococcal polysaccharide antigens (IgG, IgA, IgM) and antibodies to cytomegalovirus (IgG), and serum B-cell activating factor (BAFF) levels...
April 6, 2018: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/29751884/acute-chronic-and-humoral-rejection-pathologic-features-under-current-immunosuppressive-regimes
#3
REVIEW
Jamie Koo, Hanlin L Wang
Under current immunosuppressive regimes, T-cell-mediated acute and chronic rejection remain common and important posttransplant complications. The definition of humoral (antibody-mediated) rejection has been greatly expanded in recent years. The histopathologic assessment of allograft biopsies continues to serve an important role in the diagnosis of rejection and to facilitate patient management. The diagnosis of both acute and chronic antibody-mediated rejection requires integration of the results of donor-specific antibody testing and C4d immunostaining, as well as exclusion of other potential etiologies of allograft dysfunction...
June 2018: Surgical Pathology Clinics
https://www.readbyqxmd.com/read/29740433/syk-inhibition-induces-apoptosis-in-germinal-center-like-b-cells-by-modulating-the-antiapoptotic-protein-myeloid-cell-leukemia-1-affecting-b-cell-activation-and-antibody-production
#4
Nathalie Roders, Florence Herr, Gorbatchev Ambroise, Olivier Thaunat, Alain Portier, Aimé Vazquez, Antoine Durrbach
B cells play a major role in the antibody-mediated rejection (AMR) of solid organ transplants, a major public health concern. The germinal center (GC) is involved in the generation of donor-specific antibody-producing plasma cells and memory B cells, which are often poorly controlled by current treatments. Myeloid cell leukemia-1 (Mcl-1), an antiapoptotic member of the B-cell lymphoma-2 family, is essential for maintenance of the GC reaction and B-cell differentiation. During chronic AMR (cAMR), tertiary lymphoid structures resembling GCs appear in the rejected organ, suggesting local lymphoid neogenesis...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29734357/cyclosporine-a-drug-delivery-system-for-high-risk-penetrating-keratoplasty-stabilizing-the-intraocular-immune-microenvironment
#5
Ting Zhang, Zhiyuan Li, Ting Liu, Suxia Li, Hua Gao, Chao Wei, Weiyun Shi
Cyclosporine A (CsA) is an essential medication used to prevent corneal allograft rejection. Our preliminary studies revealed that CsA drug-delivery system (DDS) was more effective in preventing high-risk corneal allograft rejection than topical CsA application. However, the impacts of CsA DDS on the intraocular immune microenvironment were not fully elucidated. In the present study, we investigated the effect of CsA DDS on the cornea allograft, aqueous humor, and iris-ciliary body using a rabbit model of high-risk penetrating keratoplasty...
2018: PloS One
https://www.readbyqxmd.com/read/29689130/a-donor-and-recipient-candidate-gene-association-study-of-allograft-loss-in-renal-transplant-recipients-receiving-a-tacrolimus-based-regimen
#6
Jean-Baptiste Woillard, Philippe Gatault, Nicolas Picard, Hélène Arnion, Dany Anglicheau, Pierre Marquet
This work investigated, in two large cohorts of French renal transplants treated with tacrolimus, the influence of donor and recipient ABCB1, CYP3A4, and CYP3A5 genotypes on the risk of allograft loss. A discovery and a replication population of 330 and 369 adult renal transplant patients, each from a different transplantation center and all receiving a tacrolimus-based immunosuppressive regimen, were retrospectively genotyped. The influence of genetic factors and other known risk factors on allograft loss was investigated using multivariate Cox proportional hazard analyses...
April 24, 2018: American Journal of Transplantation
https://www.readbyqxmd.com/read/29665205/characterization-of-the-in-vitro-and-in-vivo-properties-of-cfz533-a-blocking-and-non-depleting-anti-cd40-monoclonal-antibody
#7
Jacinda Ristov, Pascal Espie, Peter Ulrich, Denise Sickert, Thierry Flandre, Mirela Dimitrova, Dorothee Müller-Ristig, Doris Weider, Gautier Robert, Patrick Schmutz, Barbara Greutmann, Francisco Cordoba-Castro, Martin A Schneider, Max Warncke, Frank Kolbinger, Serge Cote, Christoph Heusser, Christian Bruns, James S Rush
The CD40-CD154 costimulatory pathway is essential for T cell-dependent immune responses, development of humoral memory, and antigen presenting cell function. These immune functions have been implicated in the pathology of multiple autoimmune diseases as well as allograft rejection. We have generated CFZ533, a fully human, pathway blocking anti-CD40 monoclonal antibody that has been modified with a N297A mutation to render it unable to mediate Fcγ-dependent effector functions. CFZ533 inhibited CD154-induced activation of human leukocytes in vitro, but failed to induce human leukocyte activation...
April 17, 2018: American Journal of Transplantation
https://www.readbyqxmd.com/read/29620612/tofacitinib-halts-progression-of-graft-dysfunction-in-a-rat-model-of-mixed-cellular-and-humoral-rejection
#8
Jordi Rovira, María J Ramírez-Bajo, Elisenda Banon-Maneus, Marta Lazo-Rodríguez, Daniel Moya-Rull, Natalia Hierro-Garcia, Valeria Tubita, Gastón J Piñeiro, Ignacio Revuelta, Pedro Ventura-Aguiar, David Cucchiari, Federico Oppenheimer, Mercè Brunet, Josep M Campistol, Fritz Diekmann
BACKGROUND: The progression from acute to chronic antibody-mediated rejection in kidney transplant recipients is usually not prevented by current therapeutic options. Here, we investigated whether the use of tofacinitib, a Janus kinase 3 inhibitor, was capable of preventing the progression of allograft dysfunction in a Fisher-to-Lewis rat model of kidney transplantation. METHODS: Rats were treated from the third week after transplantation in order to allow the development of rejection...
April 3, 2018: Transplantation
https://www.readbyqxmd.com/read/29619027/predictive-virtual-infection-modeling-of-fungal-immune-evasion-in-human-whole-blood
#9
Maria T E Prauße, Teresa Lehnert, Sandra Timme, Kerstin Hünniger, Ines Leonhardt, Oliver Kurzai, Marc Thilo Figge
Bloodstream infections by the human-pathogenic fungi Candida albicans and Candida glabrata increasingly occur in hospitalized patients and are associated with high mortality rates. The early immune response against these fungi in human blood comprises a concerted action of humoral and cellular components of the innate immune system. Upon entering the blood, the majority of fungal cells will be eliminated by innate immune cells, i.e., neutrophils and monocytes. However, recent studies identified a population of fungal cells that can evade the immune response and thereby may disseminate and cause organ dissemination, which is frequently observed during candidemia...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29617399/activation-of-human-macrophages-by-human-corneal-allogen-in-vitro
#10
Paola Kammrath Betancor, Antonia Hildebrand, Daniel Böhringer, Florian Emmerich, Günther Schlunck, Thomas Reinhard, Thabo Lapp
PURPOSE: To study distinct aspects of human monocyte-derived macrophage (MDM) activation by human corneal tissue as a possible initial stage in human corneal allograft rejection. METHODS: Human monocytes were isolated from peripheral blood mononuclear cells (PBMC) and differentiated into MDM. Human corneas with or without endothelium were fragmented using a standardized protocol. MDM were stimulated with human corneal fragments, corneal fragment supernatant, lipopolysaccharide (LPS) or interferon-gamma (IFNγ), and expression profiles for 34 cytokines were determined in MDM-conditioned media using a Luminex bead-based multiplex assay...
2018: PloS One
https://www.readbyqxmd.com/read/29616284/-urology-and-alternative-medicine-1900-1970
#11
REVIEW
F G Mildenberger
Disorders of the lower abdomen were often associated with sexually transmitted diseases (STDs) or related conditions. The urological diagnostic workup and treatment was based on the idea that technical devices and objective scientific examination methods would lead to targeted success. The fact that illnesses such as urinary retention, urinary incontinence, urge incontinence, orchitis or urethritis often implicated psychosomatic complications and had a possibly far more important impact on sexual life did not play a role in the early years of urology...
May 2018: Der Urologe. Ausg. A
https://www.readbyqxmd.com/read/29602372/-the-pathology-of-renal-transplants
#12
Eduardo Vazquez Martul
In order to make an objective assessment of the histopathology of a renal biopsy during a kidney transplant, all the various elements involved in the process must be understood. It is important to know the characteristics of the donor organ, especially if the donor is older than 65. The histopathological features of the donor biopsy, especially its vascular status, are often related to an initial poor function of the transplanted kidney. The T lymphocyte inflammatory response is characteristic in acute cellular rejection; the degree of tubulitis, together with the amount of affected parenchyme, are important factors...
April 2018: Revista Española de Patología
https://www.readbyqxmd.com/read/29577962/correlations-between-donor-specific-antibodies-and-non-adherence-with-chronic-active-antibody-mediated-rejection-phenotypes-and-their-impact-on-kidney-graft-survival
#13
Jorge Malheiro, Sofia Santos, Sandra Tafulo, Leonídio Dias, La Salete Martins, Isabel Fonseca, Manuela Almeida, Sofia Pedroso, Idalina Beirão, António Castro-Henriques, António Cabrita
Chronic-active antibody-mediated rejection (CAABMR) is associated with poor kidney graft survival and has no clear effective treatment. Forty-one cases of CAABMR were detected in indication graft biopsies and evaluated according to current Banff classification. We investigated the impact of concurrent donor-specific antibodies (DSA) and their characteristics, together with non-adherence regarding immunosuppression on CAABMR histopathological phenotypes and prognosis. Twenty-four (59%) patients had detectable DSA at biopsy, with 15 of them being considered non-adherent...
June 2018: Human Immunology
https://www.readbyqxmd.com/read/29576879/the-balance-of-th1-th2-and-lap-tregs-th17-cells-is-crucial-for-graft-survival-in-allogeneic-corneal-transplantation
#14
Shang Li, Jing Yu, Chungang Guo, Ying Jie, Zhiqiang Pan
Purpose: CD4+LAP+ T cells are newly discovered regulatory T cells (Tregs). The aim of this study is to investigate the balance of Th1/Th2 and LAP+Tregs/Th17 in mice after allogeneic corneal transplantation. Methods: A total of 65 mice received orthotopic penetrating transplantation. According to the survival scores of the grafts, the mice were divided into the rejection group and the survival group 3 weeks after transplantation. Th1, Th2, Th17, and regulatory T cells in the ipsilateral drainage lymph nodes and spleens were measured with flow cytometry...
2018: Journal of Ophthalmology
https://www.readbyqxmd.com/read/29528010/de-novo-thrombotic-microangiopathy-in-renal-transplant-patients
#15
B Handan Özdemir, Alev Ok Atılgan, Eda Yılmaz Akçay, Gökçe Özdemir, Ebru Ayvazoğlu Soy, Aydıncan Akdur, Mehmet Haberal
OBJECTIVES: Thrombotic microangiopathy is a form of renal capillary injury possibly associated with calcineurin inhibitor toxicity, acute humoral rejection, infections, and recurrent diseases. Here, we examined its incidence in patients diagnosed with acute and chronic active humoral rejection, polyomavirus nephropathy, acute cellular rejection, and immunoglobulin A recurrence. MATERIALS AND METHODS: In total, 272 renal allograft recipients who met the inclusion criteria were reevaluated for presence of renal thrombotic microangiopathy...
March 2018: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/29527999/prevalence-and-angiographic-characteristics-of-coronary-vasospasm-detected-at-surveillance-coronary-angiograms-among-patients-with-heart-transplants
#16
Neslihan Arzu Akgün, Orçun Çiftci, Kerem Can Yılmaz, Emir Karaçağlar, Alp Aydınalp, Atilla Sezgin, I Haldun Müderrisoğlu, Mehmet Haberal
OBJECTIVES: Coronary vasospasm in heart transplant recipients occurs through various mechanisms. It has been linked to allograft rejection and coronary vasculopathy, which can result in mortality during follow-up. Here, we investigated the prevalence of coronary vasospasm among heart transplant recipients undergoing surveillance coronary angiography procedures. MATERIALS AND METHODS: This study was prospectively performed at Başkent University Faculty of Medicine by retrospectively analyzing medical information of patients who underwent bicaval heart transplant between 2003 and 2016 and subsequently had coronary angiography to rule out allograft vasculopathy...
March 2018: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/29527998/posttransplant-pulmonary-hypertension-is-correlated-with-acute-rejection-and-death-among-cardiac-transplant-recipients-a-single-center-study
#17
Orçun Çiftci, Neslihan Arzu Akgün, Kerem Can Yılmaz, Emir Karaçağlar, Alp Aydınalp, Atilla Sezgin, I Haldun Müderrisoğlu, Mehmet Haberal
OBJECTIVES: Endomyocardial biopsy sampling is used to check acute rejection after cardiac transplant. However, it may lead to tricuspid valve injury and cardiac perforation; therefore, less invasive tools may be useful. Right heart catheterization provides valuable information about cardiac hemodynamics. Herein, we aimed to determine the correlation of right heart catheterization parameters with acute rejection and death during cardiac transplant follow-up. MATERIALS AND METHODS: We retrospectively evaluated follow-up right heart catheterization and endomyocardial biopsy results from 47 adult patients who underwent cardiac transplant at Başkent University Faculty of Medicine between 2004 and 2016...
March 2018: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/29527745/galt-ko-pig-lungs-are-highly-susceptible-to-acute-vascular-rejection-in-baboons-which-may-be-mitigated-by-transgenic-expression-of-hcd47-on-porcine-blood-vessels
#18
Hironosuke Watanabe, Hisashi Sahara, Shunichiro Nomura, Tatsu Tanabe, Dilrukshi K Ekanayake-Alper, Lennan K Boyd, Nathan J Louras, Arsenoi Asfour, Makenzie A Danton, Siu-Hong Ho, Scott J Arn, Robert J Hawley, Akira Shimizu, Takeshi Nagayasu, David Ayares, Marc I Lorber, Megan Sykes, David H Sachs, Kazuhiko Yamada
BACKGROUND: Despite recent progress in survival times of xenografts in non-human primates, there are no reports of survival beyond 5 days of histologically well-aerated porcine lung grafts in baboons. Here, we report our initial results of pig-to-baboon xeno-lung transplantation (XLTx). METHODS: Eleven baboons received genetically modified porcine left lungs from either GalT-KO alone (n = 3), GalT-KO/humanCD47(hCD47)/hCD55 (n = 3), GalT-KO/hD47/hCD46 (n = 4), or GalT-KO/hCD39/hCD46/hCD55/TBM/EPCR (n = 1) swine...
March 12, 2018: Xenotransplantation
https://www.readbyqxmd.com/read/29507276/classification-of-acute-rejection-episodes-in-kidney-transplantation-a-proposal-based-on-factor-analysis
#19
Francisco E Rodríguez Castellanos, Francisco Domínguez Quintana, Virgilia Soto Abraham, Eduardo Mancilla Urrea
INTRODUCTION: Kidney transplantation is considered the ideal treatment for end-stage renal disease. Acute rejection can influence graft survival. The aim of this study was to propose a classification system for acute rejection based on factor analysis. MATERIALS AND METHODS: Data were collected from kidney transplant recipients with acute rejection diagnosis based on standard histological variables, the presence of peritubular eosinophils, and immunolabeling for lysozyme and myeloperoxidase in kidney tissue...
March 2018: Iranian Journal of Kidney Diseases
https://www.readbyqxmd.com/read/29480366/inflammatory-cytokine-tnf-%C3%AE-promotes-corneal-endothelium-apoptosis-via-upregulating-tipe2-transcription-during-corneal-graft-rejection
#20
Qun Wang, Chao Wei, Li Ma, Xin Wang, Lin Li, Qingjun Zhou, Weiyun Shi
PURPOSE: Endothelial dysfunction accounts for 50% of total corneal transplantation failures, suggesting that corneal endothelial damage is the leading cause of graft failure. Tumor necrosis factor-α (TNF-α) is known to contribute to the negative regulation of corneal transplantation, but how it does so remains unclear. Here, we report a regulatory loop involving TNF-α, TNF-α-induced protein 8 like 2 (TNFAIP8L2 or TIPE2), and apoptosis during corneal graft rejection. METHODS: We established mice models of penetrating keratoplasty to verify whether the quantification of TNF-α in allogeneic corneas is enhanced through ELISA assay and immunofluorescence staining...
April 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
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