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anti hla antibodies

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https://www.readbyqxmd.com/read/28644352/elevated-serum-tissue-transglutaminase-antibodies-in-children-with-eosinophilic-esophagitis
#1
Anna K Le Fevre, Marjorie M Walker, Amir Hadjiashrafy, Rani Bhatia, Joerg Mattes, Nicholas J Talley, Scott Nightingale
OBJECTIVES: This study compared the clinical and histopathological characteristics of children with eosinophilic esophagitis (EoE) and elevated anti-transglutaminase (TTG Ab) with those with EoE and normal TTG Ab titres. METHODS: Single-center chart and blinded histopathological review of patients diagnosed with EoE for a 4-year period, who had esophageal and duodenal biopsies taken at time of endoscopy, and TTG Ab measured within 6 months of biopsy. Patients with histology-proven CD were excluded...
July 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28640789/complement-mediated-enhancement-of-monocyte-adhesion-to-endothelial-cells-by-hla-antibodies-and-blockade-by-a-specific-inhibitor-of-the-classical-complement-cascade-tnt003
#2
Nicole M Valenzuela, Kimberly A Thomas, Arend Mulder, Graham C Parry, Sandip Panicker, Elaine F Reed
BACKGROUND: Antibody-mediated rejection (AMR) of most solid organs is characterized by evidence of complement activation and/or intragraft macrophages (C4d + and CD68+ biopsies). We previously demonstrated that crosslinking of HLA I by antibodies triggered endothelial activation and monocyte adhesion. We hypothesized that activation of the classical complement pathway at the endothelial cell surface by HLA antibodies would enhance monocyte adhesion through soluble split product generation, in parallel with direct endothelial activation downstream of HLA signaling...
July 2017: Transplantation
https://www.readbyqxmd.com/read/28638610/looking-for-the-needle-in-the-kidney-transplantation-haystack
#3
Josep M Cruzado, Edoardo Melilli
The diagnosis of acute rejection still relies on renal allograft biopsy. In fact, histological features including C4d staining can be useful to differentiate cellular and antibody-mediated acute rejection. However, the pathogenic mechanism to define the type of rejection is usually assessed by anti-HLA donor specific antibodies (DSA) monitoring. Suspicion of acute rejection is usually based on renal function deterioration. This method has low sensitivity. Moreover, creatinine increase follows graft injury and therefore the diagnosis is performed when there is an ongoing acute rejection...
February 2017: Clinical Kidney Journal
https://www.readbyqxmd.com/read/28638585/clinicopathological-study-of-seronegative-celiac-disease-in-adults-in-pakistan-a-pilot-study
#4
Mohammad Hanif Farina, Rajesh Kumar Mandhwani, Nasir Hassan Luck, Zaigham Abbas, Muhammed Mubarak, S Mudassir Laeeq, Abbas Ali Tasneem
BACKGROUND Celiac disease (CD) is usually missed, if the serology is negative. We aimed to evaluate the clinicopathological characteristics of seronegative CD (SNCD) and its response to gluten-free diet (GFD) in adult patients. METHODS This observational study was carried out at the Department of Hepatogastroenterology, Sindh Institute of Urology and Transplantation, Karachi, Pakistan from 2009 to 2015. All consecutive adult patients (≥17 years) with features of marked villous atrophy (Marsh class≥III) on duodenal biopsy, negative tissue transglutaminase IgA and IgG antibodies (anti-tTg IgA and IgG) and human leukocyte antigen (HLA) DQ2 or DQ8 serotypes were studied...
April 2017: Middle East Journal of Digestive Diseases
https://www.readbyqxmd.com/read/28634772/the-effect-of-desensitization-therapy-in-kidney-transplantation
#5
Yong Chul Kim, Mi-Yeon Yu, Jung Pyo Lee, Hajeong Lee, Sang-Il Min, Jongwon Ha, Yon Su Kim
BACKGROUND: Desensitization therapy may enable the patient to get allograft in sensitized recipient or solve the organ shortage in ABO-incompatible relationship in kidney transplantation (KT). However, the graft outcome and morbidity remains unclear. METHODS: We retrospectively analyzed 845 KT patients from January 2010 to February 2016 at Seoul National University Hospital. The patients were divided into three groups as follows: HLA-incompatible (HLAi) group, ABO-incompatible (ABOi) group, and control group...
June 20, 2017: Clinical and Experimental Nephrology
https://www.readbyqxmd.com/read/28634589/hla-class-ia-and-ib-polyreactive-anti-hla-e-igg2a-monoclonal-antibodies-tfl-006-and-tfl-007-suppress-anti-hla-igg-production-by-cd19-b-cells-and-proliferation-of-cd4-t-cells-while-upregulating-tregs
#6
REVIEW
Mepur H Ravindranath
The anti-HLA-E IgG2a mAbs, TFL-006 and TFL-007, reacted with all HLA-I antigens, similar to the therapeutic preparations of IVIg. Indeed, IVIg lost its HLA reactivity, when its HLA-E reactivity was adsorbed out. US-FDA approved IVIg to reduce antibodies in autoimmune diseases. But the mechanism underlying IVIg-mediated antibody reduction could not be ascertained due to the presence of other polyclonal antibodies. In spite of it, the cost prohibitive high or low IVIg is administered to patients waiting for donor organ and for allograft recipients for lowering antiallograft antibodies...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28629951/immunogenicity-of-class-i-hla-but-not-preformed-low-mfi-donor-specific-antibodies-correlates-with-outcomes-after-first-renal-transplantation
#7
A Lobashevsky, W Goggins, K Rosner, T Taber
BACKGROUND: The role of low levels of circulating donor specific antibodies (DSA) producing negative flow cytometry cross match is not completely defined. The purpose of this study was to examine the clinical significance of preexisting low levels of class I DSAs in flow cytometry cross match (FC CM) negative first kidney transplant recipients (KTRs). METHODS: All of the KTRs (n=41) had low levels of anti-class I antibodies only. The kidney transplant outcome was evaluated by the development of a deleterious effect (DE) in recipients in the study cohort (Group 1: DE+, Group 2: DE-)...
June 16, 2017: Transplant Immunology
https://www.readbyqxmd.com/read/28626871/a-successful-living-donor-liver-re-transplantation-for-graft-failure-within-seven-days-due-to-acute-de-novo-donor-specific-anti-hla-antibody-mediated-rejection
#8
Yohei Yamada, Ken Hoshino, Teisaburo Mori, Miho Kawaida, Kiyotomo Abe, Hideo Ishihama, Takahiro Shimizu, Nobuhiro Takahashi, Kentaro Matsubara, Taizo Hibi, Yuta Abe, Hiroshi Yagi, Naoki Shimojima, Masahiro Shinoda, Minoru Kitago, Hideaki Obara, Yasushi Fuchimoto, Kaori Kameyama, Yuko Kitagawa, Tatsuo Kuroda
Growing evidence suggests a relationship between antibody-mediated rejection (AMR) and early graft failure due to a previously unknown etiology in liver transplantation (LTx). We herein report a three-year-old boy who developed rapid graft failure due to de novo donor-specific antibody (DSA)-driven AMR a week after living donor LTx, requiring a second transplant on the 10th day after the first LTx. The pathology of the first graft showed massive necrosis in zone 3 along with positive C4d and inflammatory cell infiltrates in portal areas...
June 19, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/28626773/hla-epitopes-the-targets-of-monoclonal-and-alloantibodies-defined
#9
REVIEW
Nadim El-Awar, Vadim Jucaud, Anh Nguyen
Sensitization to human leukocyte antigens (HLA) in organ transplant patients causes graft rejection, according to the humoral theory of transplantation. Sensitization is almost ubiquitous as anti-HLA antibodies are found in almost all sera of transplant recipients. Advances in testing assays and amino acid sequencing of HLA along with computer software contributed further to the understanding of antibody-antigen reactivity. It is commonly understood that antibodies bind to HLA antigens. With current knowledge of epitopes, it is more accurate to describe that antibodies bind to their target epitopes on the surface of HLA molecular chains...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28619747/successful-immune-checkpoint-blockade-in-a-patient-with-advanced-stage-microsatellite-unstable-biliary-tract-cancer
#10
Elena Czink, Matthias Kloor, Benjamin Goeppert, Stefan Froehling, Sebastian Uhrig, Tim F Weber, Joern Meinel, Christian Sutter, Karl Heinz Weiss, Peter Schirmacher, Magnus von Knebel Doeberitz, Dirk Jaeger, Christoph Springfeld
Cancers acquire multiple somatic mutations that can lead to the generation of immunogenic mutation-induced neoantigens. These neoantigens can be recognized by the host's immune system. However, continuous stimulation of immune cells against tumor antigens can lead to immune cell exhaustion, which allows uncontrolled outgrowth of tumor cells. Recently, immune checkpoint inhibitors have emerged as a novel approach to overcome immune cell exhaustion and re-activate anti-tumor immune responses. In particular, antibodies blocking the exhaustion-mediating programmed death receptor (PD-1)/PD-L1 pathway have shown clinical efficacy...
June 15, 2017: Cold Spring Harbor Molecular Case Studies
https://www.readbyqxmd.com/read/28609832/pembrolizumab-induced-thyroiditis-comprehensive-clinical-review-and-insights-into-underlying-involved-mechanisms
#11
Danae A Delivanis, Michael P Gustafson, Svetlana Bornschlegl, Michele M Merten, Lisa Kottschade, Sarah Withers, Allan B Dietz, Mabel Ryder
Context: Thyroid immune-related adverse events (irAEs) in patients treated with programmed death receptor-1 (PD-1) blockade are increasingly recognized as one of the most common adverse effects. Our aim was to determine the incidence and examine the potential mechanisms of anti-PD-1 induced thyroid irAEs. Design: Single center, retrospective cohort study. Patients and Measurements: We studied 93 patients with advanced cancer (aged 24–82 years; 60% males) who received at least one infusion of pembrolizumab...
May 9, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28608441/transfusion-related-acute-lung-injury-critical-neutrophil-activation-by-anti-hla-a2-antibodies-for-endothelial-permeability
#12
Kathy Khoy, Minh Vu Chuong Nguyen, Dominique Masson, Béatrice Bardy, Christian Drouet, Marie-Hélène Paclet
BACKGROUND: Transfusion-related acute lung injury (TRALI) is a major complication of hemotherapy that may occur after the transfusion of any blood type component. Several clinical reports have suggested the presence of anti-HLA antibodies in the blood product. This study sought to examine the role of anti-HLA-A2 antibodies in polymorphonuclear neutrophil (PMN) activation and thus in endothelial permeability. STUDY DESIGN AND METHODS: PMN activation was assessed by both nicotinamide adenine dinucleotide phosphate oxidase (NADPH oxidase) activity and reactive oxygen species (ROS) production...
June 13, 2017: Transfusion
https://www.readbyqxmd.com/read/28606713/rhabdomyolysis-and-coeliac-disease-a-causal-or-casual-association-a-case-report-and-review-of-literature
#13
Claudia Mandato, Alessandro Rossi, Mariano Caldore, Marta Lamba, Michele Rocco, Renata Auricchio, Pietro Vajro, Paolo Siani
BACKGROUND: Rhabdomyolysis is a rare, potentially life-threatening condition, caused by multiple disorders. The association with Coeliac Disease (CD) has been rarely reported and in these cases muscular damage was imputed to hypokalemia. Herein we describe a new case of severe rhabdomyolysis in a child subsequently diagnosed as affected by CD, and review previous reports. CASE PRESENTATION: A 3-year-old boy was referred for diarrhea, brown urine, muscular pain/weakness, and no history of muscular trauma...
June 9, 2017: Clinics and Research in Hepatology and Gastroenterology
https://www.readbyqxmd.com/read/28604384/antibody-mediated-rejection-across-solid-organ-transplants-manifestations-mechanisms-and-therapies
#14
Nicole M Valenzuela, Elaine F Reed
Solid organ transplantation is a curative therapy for hundreds of thousands of patients with end-stage organ failure. However, long-term outcomes have not improved, and nearly half of transplant recipients will lose their allografts by 10 years after transplant. One of the major challenges facing clinical transplantation is antibody-mediated rejection (AMR) caused by anti-donor HLA antibodies. AMR is highly associated with graft loss, but unfortunately there are few efficacious therapies to prevent and reverse AMR...
June 12, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28598783/anti-homocitrullinated-protein-antibody-isotype-usage-in-rheumatoid-arthritis-and-their-unaffected-first-degree-relatives
#15
David A Bell, Sallie Elhayek, Ewa Cairns, Lillian Barra
OBJECTIVES: The majority of rheumatoid arthritis (RA) patients express anti-citrullinated protein antibodies (ACPA). Unaffected first-degree relatives of RA patients (FDR) also express ACPA, commonly of the IgA isotype. IgG anti-homocitrullinated/carbamylated protein antibodies (AHCPA) have been detected in both RA and FDR. It is unknown whether other isotypes are expressed. We aim to investigate the AHCPA isotype profile in unaffected FDR of RA patients. METHODS: The enrolled subjects were examined by a rheumatologist...
June 5, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28595520/a-case-of-fulminant-type-1-diabetes-following-anti-pd1-immunotherapy-in-a-genetically-susceptible-patient
#16
Manuel Araújo, Dário Ligeiro, Luís Costa, Filipa Marques, Helder Trindade, José Manuel Correia, Candida Fonseca
Programmed cell death-1 protein (PD-1) is an immune checkpoint that has gained popularity in the treatment of several advanced cancers. Inhibiting this checkpoint is known to enhance immune response, but is also known to diminish immune tolerance and to increase autoimmune toxicity. We discuss a case of rapid onset fulminant Type 1 diabetes induced by treatment with anti-programmed cell death-1 monoclonal antibody, nivolumab, in a patient with late-stage non-small-cell lung adenocarcinoma. The patient had no history of previous diabetes but did reveal a high-risk genotype for Type 1 diabetes development (DR3-DQ2; DR4-DQ8)...
June 2017: Immunotherapy
https://www.readbyqxmd.com/read/28594750/blockade-of-hla-antibody-triggered-classical-complement-activation-in-sera-from-subjects-dosed-with-the-anti-c1s-monoclonal-antibody-tnt009-results-from-a-randomized-first-in-human-phase-1-trial
#17
Jakob Mühlbacher, Bernd Jilma, Markus Wahrmann, Johann Bartko, Farsad Eskandary, Christian Schörgenhofer, Michael Schwameis, Graham C Parry, James C Gilbert, Sandip Panicker, Georg A Böhmig
BACKGROUND: Complement may play a key role in antibody-mediated rejection (ABMR). A promising therapeutic approach may be classical pathway (CP) inhibition at the level of early component C1. METHODS: In this first-in-human, double-blind, randomized placebo-controlled phase 1 trial, we evaluated the safety and complement inhibitory effect of TNT009, a humanized monoclonal anti-C1s antibody. Sixty-four adult healthy volunteers received either single (n=48; 7 consecutive cohorts: 0...
June 7, 2017: Transplantation
https://www.readbyqxmd.com/read/28586844/skeletal-muscle-involvement-in-antisynthetase-syndrome
#18
Eri Noguchi, Akinori Uruha, Shigeaki Suzuki, Kohei Hamanaka, Yuko Ohnuki, Jun Tsugawa, Yurika Watanabe, Jin Nakahara, Takashi Shiina, Norihiro Suzuki, Ichizo Nishino
Importance: Antisynthetase syndrome, characterized by myositis, interstitial lung disease, skin rash, arthropathy, and Raynaud phenomenon, is a clinical entity based on the presence of aminoacyl transfer RNA synthetase (ARS) antibodies in patients' serum. However, antisynthetase syndrome is not included in the histological subsets of idiopathic inflammatory myopathies. Objective: To elucidate the clinical features of myositis in patients with antisynthetase syndrome...
June 5, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/28585912/anti-hla-antibodies-testing-on-solid-phase-comparative-evaluation-of-different-kit-vendors-through-luminex-technology
#19
Pellegrino Biagio Minucci, Marianna Resse, Chiara Sabia, Antonella Esposito, Gustavo De Iorio, Claudio Napoli
OBJECTIVES: For decades, the detection of anti-HLA antibodies in candidates for solid-organ transplant has been performed with the traditional complement-dependent cytotoxicity method; this assay has been then integrated with the introduction of solid-phase assays. Over the past 20 years, the Luminex assay has become the most widely used in clinical laboratories due to both increased sensitivity and specificity versus enzyme-linked immunosorbent assay. However, even the Luminex technique has shown some critical issues, and choosing the most reliable method still remains challenging...
June 5, 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/28585408/increased-risk-of-infection-associated-death-with-incompatible-kidney-transplantations
#20
Christian Morath, Martin Zeier, Caner Süsal
In times of organ shortage, transplantation over the blood group A/B and HLA antibody barriers helps increasing the living donor pool in kidney transplantation. Waiting times are reduced while patient survival may be improved. By desensitization, both blood group A/B as well as HLA antibodies are eliminated from the patient's circulation using plasmapheresis, double filtration plasmapheresis or selective or unselective immunoadsorption. In addition, antibody production and posttransplant antibody rebound are prevented by powerful immunosuppression and induction therapy with or without B-cell eliminating anti-CD20 antibody rituximab...
June 6, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
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