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Panel reactive antibody

Arthur Wong, Janet M Lanyon, Sara J McKee, Richard Linedale, Lucy Woolford, Trevor Long, Graham R Leggatt
Species-specific antibodies (Ab) for the measurement of immunoglobulins (Ig) are valuable tools for determining the humoral immune status of threatened and endangered wildlife species such as dugongs. However, no studies have reported antibody reagents against dugong immunoglobulin. The object of this study was to develop an Ab with specificity for dugong IgG and apply this tool to survey total IgG levels in plasma samples from a live wild population of dugongs in southern Queensland, Australia. Dugong IgG was isolated from plasma by protein A/G column chromatography and a polyclonal antiserum was successfully raised against the dugong IgG through immunization of mice...
June 2018: Veterinary Immunology and Immunopathology
Desheng Kong, Yan Wang, Ping Ji, Wei Li, Tianlei Ying, Jinghe Huang, Chen Wang, Yanling Wu, Yanping Wang, Weizao Chen, Yanling Hao, Kunxue Hong, Yiming Shao, Dimiter S Dimitrov, Shibo Jiang, Liying Ma
OBJECTIVE: Current treatments cannot completely eradicate HIV-1 owing to the presence of latently infected cells which harbor transcriptionally silent HIV-1. However, defucosylated antibodies can readily kill latently infected cells after their activation to express envelope glycoprotein (Env) through antibody-dependent cellular cytotoxicity (ADCC). We herein aimed to test a defucosylated bispecific multivalent molecule consisting of domain-antibody and single-domain CD4, LSEVh-LS-F, for its HIV-1 neutralizing activity and ADCC against the reactivated latently infected cells, compared with the non-defucosylated molecule LSEVh-LS...
May 11, 2018: AIDS
S D Hwang, K-M Park, S W Lee, J-Y Han, M-J Kim, J H Song
BACKGROUND: We report a case of posttransplant contrast-induced nephropathy (CIN) that occurred after performing computed tomography (CT) scanning for pretransplant cardiac and vascular evaluation. CASE PRESENTATION: The patient had an 8-year history of hemodialysis and was admitted to the hospital for a kidney transplant from a deceased donor. Cardiac CT imaging and 3-dimensional low-extremity CT angiography were performed to confirm the patient's cardiac and iliac artery function...
May 2018: Transplantation Proceedings
W Y Park, S S Kang, K Jin, S B Park, S Han
BACKGROUND: Although the hospitalization rate at early period of kidney transplantation (KT) is still high, the association between the hospitalization within 1 year after KT and graft survival is unclear. We investigated the incidence and causes of hospitalization and clinical outcome of the patients hospitalized within 1 year after KT. METHODS: We retrospectively analyzed 174 KT recipients (KTRs) hospitalized within 1 year after KT between 2013 and 2015. RESULTS: Among them, 84 (48%) KTRs were admitted within 1 year after KT, and the number of hospitalizations was 116...
May 2018: Transplantation Proceedings
Shiraazkhan Abdul, Miet Peeters, Els Brouwers, Joyce J M C Malfliet, Frank W G Leebeek, Paul J Declerck, Dingeman C Rijken, Shirley Uitte de Willige
Around 70% of circulating alpha-2-antiplasmin (α2AP), the main natural plasmin inhibitor, is N-terminally cleaved between residues Pro12 and Asn13 by antiplasmin-cleaving enzyme. This converts native Met-α2AP into the more potent fibrinolysis inhibitor Asn-α2AP. The Arg6Trp (R6W) polymorphism affects the N-terminal cleavage rate of Met-α2AP in a purified system, with ~8-fold faster conversion of Met(R6)-α2AP than Met(W6)-α2AP. To date, assays to determine N-terminally intact Met-α2AP in plasma have been limited to an ELISA that only measures Met(R6)-α2AP...
2018: PloS One
Matthew J O'Connor, Andrew C Glatz, Joseph W Rossano, Robert E Shaddy, Rachel Ryan, Chitra Ravishankar, Stephanie Fuller, Christopher E Mascio, J William Gaynor, Kimberly Y Lin
BACKGROUND: Risk assessment in heart transplantation is critical for candidate selection, but current models inadequately assess individual risk of postoperative mortality. We sought to identify risk factors and develop a scoring system to predict mortality following heart transplantation in children. METHODS: The records of patients undergoing heart transplantation at our institution from 2010 - 2016 were reviewed. Clinical characteristics were recorded and compared between survivors and non-survivors...
April 20, 2018: Annals of Thoracic Surgery
Archana Lakshmanan, Deeksha Sikri, Sushama Patil, Ann Kurian, S Annapurneswari, Sheila Nair
Aims: In world literature, Peripheral T-cell lymphomas (PTCLs) constituted about 12% of non-Hodgkin's lymphomas (NHL) of which PTCL not otherwise specified (NOS) was the most common subtype. This study was undertaken to ascertain the frequency and to assess the morphologic and immunophenotypic characteristics of PTCL, NOS over a period of 5 years in a tertiary care referral center in Southern India. Materials and Methods: Slides and blocks of all PTCL, NOS were retrieved, and a detailed morphologic and immunophenotypic study using a wide panel of antibodies was done...
April 2018: Indian Journal of Pathology & Microbiology
Zhiqing Zhang, Feng Zhang, Shimeng Bai, Jiaming Qiao, Honglin Shen, Fang Huang, Shuangquan Gao, Shaowei Li, Ying Gu, Ningshao Xia
The HIV-1 Gag precursor protein (p55) is the main structural protein comprising the matrix (MA/p17), capsid (CA/p24), and nucleocapsid (NC/p7) proteins, and is uniquely responsible for virion assembly within the virus life cycle. The MA protein plays a critical role in plasma membrane targeting and envelope glycoprotein (Env) uptake during virion assembly. Yet, when viral infection occurs, the MA protein may also be involved in virion uncoating, dissociating from the plasma membrane, and participating in the nuclear importation process...
April 17, 2018: Biotechnology and Applied Biochemistry
S Querido, A Weigert, T Adragão, J Henriques, R Birne, P Matias, C Jorge, C Nascimento, M Bruges, D Machado
INTRODUCTION: HLA-sensitized patients are penalized both in the access to kidney transplantation (KT) and, once transplanted, in the incidence of rejections and long-term allograft survival despite aggressive induction and maintenance therapy. METHODS: This study retrospectively evaluates the impact of combining T- and B-cell-depleting agents and intravenous immunoglobulin for induction therapy in 45 highly sensitized KT patients (anti-panel reactive antibodies >60%, positive flow cytometry crossmatch or donor specific antibodies at the time of transplantation)...
April 2018: Transplantation Proceedings
S Van Laecke, T Malfait, E Schepers, W Van Biesen
Cardiovascular disease after transplantation: an emerging role of the immune system. Cardiovascular disease after transplantation remains a major concern. Little is known about what drives the increased cardiovascular risk in transplant recipients apart from traditional risk factors. The immune system is involved in the pathogenesis of hypertension, atherosclerosis, and coronary artery disease in the general population. Recently, inhibition of interleukin 1-β by canakinumab versus placebo decreased the incidence of cardiovascular events...
April 2, 2018: Transplant International: Official Journal of the European Society for Organ Transplantation
Alok Choudhary, Deendayal Patel, William Honnen, Zhong Lai, Raja Sekhar Prattipati, Ruixiang Blake Zheng, Ying-Chao Hsueh, Maria Laura Gennaro, Alfred Lardizabal, Blanca I Restrepo, Moncerrato Garcia-Viveros, Maju Joe, Yu Bai, Ke Shen, Kamar Sahloul, John S Spencer, Delphi Chatterjee, Tobias Broger, Todd L Lowary, Abraham Pinter
Lipoarabinomannan (LAM), the major antigenic glycolipid of Mycobacterium tuberculosis , is an important immunodiagnostic target for detecting tuberculosis (TB) infection in HIV-1-coinfected patients, and is believed to mediate a number of functions that promote infection and disease development. To probe the human humoral response against LAM during TB infection, several novel LAM-specific human mAbs were molecularly cloned from memory B cells isolated from infected patients and grown in vitro. The fine epitope specificities of these Abs, along with those of a panel of previously described murine and phage-derived LAM-specific mAbs, were mapped using binding assays against LAM Ags from several mycobacterial species and a panel of synthetic glycans and glycoconjugates that represented diverse carbohydrate structures present in LAM...
May 1, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
Matthew Kelling, Lubomir Sokol, Samir Dalia
Chronic active hepatitis B infection (HBV) has been implicated in lymphomagenesis of non-Hodgkin lymphoma (NHL). Treatment of cancer including NHL with chemotherapy or immunotherapy can lead to HBV reactivation in previously infected patients. Serological testing of HBV prior to initiation of this therapy is recommended by several national and international medical agencies and expert panels. Patients with positive hepatitis B surface antigen (HBsAg) and anti-hepatitis B core antibody (anti-HBc ab) need to start antiviral therapy with entecavir or tenofovir prior to initiation of chemotherapy or immunotherapy and continue this treatment for 6 to 12 months after completion of cancer therapy to avoid late HBV reactivation...
January 2018: Cancer Control: Journal of the Moffitt Cancer Center
Luz María Peverengo, Valeria Garcia, Luz María Rodeles, Diego Mendicino, Miguel Vicco, Claudia Lagier, Verónica Gonzalez, Luis Gugliotta, Iván Marcipar
The use of chimeric molecules fusing several antigenic determinants is a promising strategy for the development of low-cost, standardized and reliable kits to determine specific antibodies. In this study, we designed and assessed a novel recombinant chimera that complements the performance of our previously developed chimera, CP1 [FRA and SAPA antigens (Ags)], to diagnose chronic Chagas disease. The new chimeric protein, named CP3, is composed of MAP, TcD and TSSAII/V/VI antigenic determinants. We compared the performance of both chimeric Ags using a panel of 67 Trypanosoma cruzi-reactive sera and 67 non-reactive ones...
March 28, 2018: Parasitology
J M Sánchez-Hidalgo, J J Salamanca-Bustos, Á Arjona-Sánchez, J P Campos-Hernández, J Ruiz Rabelo, A Rodríguez-Benot, M J Requena-Tapia, J Briceño-Delgado
INTRODUCTION: Some factors affect the pancreas of a marginal donor, and although their influence on graft survival has been determined, there is an increasing consensus to accept marginal organs in a controlled manner to increase the pool of organs. Certain factors related to the recipient have also been proposed as having negative influence on graft prognosis. The objective of this study was to analyze the influence of these factors on the results of our simultaneous pancreas-kidney (SPK) transplantation series...
March 2018: Transplantation Proceedings
N G Toapanta Gaibor, F M González-Roncero, M Cintra Cabrera, M Suñer Poblet, G Bernal Blanco, A Suarez Benjumea, M A Pérez-Valdivia, J J Egea-Guerrero, J L Rocha Castilla, M A Gentil Govantes
BACKGROUND: In recent years, stagnation in the number of kidneys from after brain-dead donors (DBD) has stimulated the use of non-heart beating donors (NHBDs). Herein we present our 5-year experience with type II Maastricht NHBDs in renal transplantation. METHODS: All patients (n = 50) in this study received type II Maastricht NHBD kidneys (March 2012 to February 2017), with a median follow-up of 33 months. RESULTS: Mean donor age was 39 ± 12 years, mean creatinine 1...
March 2018: Transplantation Proceedings
M Martínez Díaz, A Torío Ruíz, I Lorenzo González, R Rada Martínez, F Llamas Fuentes, C Gonzalvo Díaz, B J Cabezuelo Rodríguez, F J Centellas Pérez, J Ontañón Rodríguez, C Gómez Roldán
BACKGROUND: Our objective in this study was to determine the effects of early renal transplantectomy on patients and the production of anti-human leukocyte antigen (anti-HLA) antibodies. METHODS: Between January 2003 and May 2017, we analyzed a group of patients for the presence of specific HLA class I and/or II donor-specific antibodies (DSA), their panel-reactive antibodies (PRA), and the time period in which the antibodies were still detectable after transplantectomy...
March 2018: Transplantation Proceedings
P K Garcia, J Toro, C Borda, C Gonzalez, M P Rodriguez, K Contreras
INTRODUCTION: Approximately 10% to 30% of patients on renal transplant waiting lists are sensitized, which gives them more time on the waiting list. Transplantation in this setting has a greater risk of rejection and decreased graft survival. New strategies of donor allocation through virtual crossmatching and optimization of immunosuppressive therapies in induction and maintenance have allowed the allocation of organs for this population, which in other circumstances would not be chosen for a kidney transplant...
March 2018: Transplantation Proceedings
Brooke A Hofmeyer, Kevin A Look, David R Hager
BACKGROUND: The Pharmacy Quality Alliance's definition of proportion of days covered (PDC) and medication possession ratio (MPR) have not been examined as potential quality measures in the kidney transplant recipient population. OBJECTIVES: To (a) describe the frequency distribution of MPR and PDC using mycophenolic acid products in a real-world kidney transplant recipient population and (b) evaluate associations between MPR and PDC with late (> 90 days after transplantation) biopsy-proven acute rejection (BPAR)...
April 2018: Journal of Managed Care & Specialty Pharmacy
Natalia Vasilyevna Rudenko, Anna Petrovna Karatovskaya, Anatolyi Nikolaevich Noskov, Anna Olegovna Shepelyakovskaya, Margarita Pavlovna Shchannikova, Irina Vladimirovna Loskutova, Olga Anatolievna Artyemieva, Daria Alexandrovna Nikanova, Elena Alexandrovna Gladyr, Fedor Alexandrovich Brovko
Staphylococcal enterotoxins cause food poisoning of various degrees of severity. For milk and meat products, there is a high probability of contamination with staphylococcal enterotoxin H (SEH). In this regard specific and sensitive methods are required to be developed for its detection and monitoring. In this work, the gene seh was expressed and a preparation of recombinant toxin was obtained. Using hybridoma technology, a panel of high-affinity monoclonal antibodies (mAbs) to SEH was produced. The antibodies were characterized and shown to have no cross-reactivity towards the main staphylococcal enterotoxins (A, B, C1, D, E, G and I)...
April 2018: Journal of Food and Drug Analysis
M Justin Iampietro, Rafael A Larocca, Nicholas M Provine, Peter Abbink, Zi Han Kang, Christine A Bricault, Dan H Barouch
Adenovirus (Ad) vectors are being investigated as vaccine candidates, but baseline antivector immunity exists in human populations to both human Ad (HuAd) and chimpanzee Ad (ChAd) vectors. In this study, we investigated the immunogenicity and cross-reactivity of a panel of recently described rhesus adenoviral (RhAd) vectors. RhAd vectors elicited T cells with low exhaustion markers and robust anamnestic potential. Moreover, RhAd vector immunogenicity was unaffected by high levels of preexisting anti-HuAd immunity...
June 1, 2018: Journal of Virology
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