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https://www.readbyqxmd.com/read/29130480/antidesmoglein-1-and-3-antibodies-in-healthy-subjects-of-a-population-in-the-peruvian-high-amazon
#1
Willy Ramos, Jesús Díaz, Ericson L Gutierrez, Jose S Lazarte, Mary C Bohnett, Gerardo Ronceros, Alex G Ortega-Loayza
BACKGROUND: The objective of this study was to determine the presence of anti-Dsg1 and Dsg3 antibodies in healthy subjects of the high Peruvian Amazon (Tuemal, Rodriguez de Mendoza province, department of Amazonas) to establish the theoretical presence of environmental factors or triggers in the area. MATERIALS AND METHODS: Cross-sectional study. The study population included persons of any age or gender, clinically healthy, who were evaluated by a dermatologist to confirm the absence of blistering diseases...
November 11, 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/29121996/production-and-characterization-of-monoclonal-antibodies-against-encephalitozoon-intestinalis-and-encephalitozoon-sp-spores-and-their-developmental-stages
#2
Fernando Izquierdo, Hercules Moura, Fernando Jorge Bornay-Llinares, Rama Sriram, Carolina Hurtado, Ángela Magnet, Soledad Fenoy, Govinda Visvesvara, Carmen Del Aguila
BACKGROUND: Microsporidia are intracellular obligate parasites traditionally associated with immunosuppressed patients; their detection in immunocompetent patients has increased, highlighting their possible importance as emerging pathogens. Detection of spores in stools, urine, body fluids and tissues is difficult and immunological techniques such as immunofluorescence have proved to be a useful and reliable tool in the diagnosis of human microsporidiosis. For this reason, we have produced and characterized monoclonal antibodies (MAbs) specific for Encephalitozoon intestinalis (the second most frequent microsporidian infecting humans), and other Encephalitozoon species, that can be used in different diagnostic techniques...
November 9, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29110375/modulation-of-immunogenicity-of-poly-sarcosine-displayed-on-various-nanoparticle-surfaces-due-to-different-physical-properties
#3
Cheol Joo Kim, Eri Hara, Naoki Watabe, Isao Hara, Shunsaku Kimura
Poly(sarcosine) displayed on polymeric micelle is reported to trigger a T cell-independent type2 reaction with B1a cells in the mice to produce IgM and IgG3 antibodies. In addition to polymeric micelle, three kinds of vesicles displaying poly(sarcosine) on surface were prepared here to evaluate the amounts and avidities of IgM and IgG3, which were produced in mice, to correlate them with physical properties of the molecular assemblies. The largest amount of IgM was produced after twice administrations of a polymeric micelle of 35 nm diameter (G1)...
November 7, 2017: Journal of Peptide Science: An Official Publication of the European Peptide Society
https://www.readbyqxmd.com/read/29063242/clinical-spectrum-and-igg-subclass-analysis-of-anti-myelin-oligodendrocyte-glycoprotein-antibody-associated-syndromes-a-multicenter-study
#4
Sara Mariotto, Sergio Ferrari, Salvatore Monaco, Maria Donata Benedetti, Kathrin Schanda, Daniela Alberti, Alessia Farinazzo, Ruggero Capra, Chiara Mancinelli, Nicola De Rossi, Roberto Bombardi, Luigi Zuliani, Marco Zoccarato, Raffaella Tanel, Adriana Bonora, Marco Turatti, Massimiliano Calabrese, Alberto Polo, Antonino Pavone, Luisa Grazian, GianPietro Sechi, Elia Sechi, Daniele Urso, Rachele Delogu, Francesco Janes, Luciano Deotto, Morena Cadaldini, Maria Rachele Bianchi, Gaetano Cantalupo, Markus Reindl, Alberto Gajofatto
Anti-myelin oligodendrocyte glycoprotein antibodies (MOG-Ab) recently emerged as a potential biomarker in patients with inflammatory demyelinating diseases of the central nervous system. We here compare the clinical and laboratory findings observed in a cohort of MOG-Ab seropositive and seronegative cases and describe IgG subclass analysis results. Consecutive serum samples referred to Verona University Neuropathology Laboratory for aquaporin-4 (AQP4)-Ab and/or MOG-Ab testing were analysed between March 2014 and May 2017...
October 23, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/29042863/adult-reference-intervals-for-igg-subclasses-with-siemens-immunonephelometric-assays-in-chinese-population
#5
Ping Li, Zhongjuan Liu, Ziyan Wu, Xiaoting Wen, Liubing Li, Shulan Zhang, Yingchun Xu, Yongzhe Li
OBJECTIVE: To determine the adult reference intervals for the Siemens IgG subclass reagents. METHODS: 636 blood samples of healthy adults were analyzed to determine the level of IgG subclass using the reagents of Siemens immunonephelometric assay with molecular biology kits. RESULTS: IgGSc reference intervals were as follows: IgG1 4.45-9.76 g/L, IgG2 2.07-8.57 g/L, IgG3 0.08-0.80 g/L and IgG4 0.05-1.54 g/L. There was an excellent correlation between the total IgG and the sum of the IgG subclasses...
2017: Allergy, Asthma, and Clinical Immunology
https://www.readbyqxmd.com/read/29042203/association-of-antibodies-to-plasmodium-falciparum-merozoite-surface-protein-4-with-protection-against-clinical-malaria
#6
Ronald Perraut, Marie-Louise Varela, Charlotte Joos, Babacar Diouf, Cheikh Sokhna, Babacar Mbengue, Adama Tall, Cheikh Loucoubar, Aissatou Touré, Odile Mercereau-Puijalon
Identification of parasite antigens targeted by immune effector mechanisms that confer protection against malaria is important for the design of a multi-component malaria vaccine. Here, the association of antibodies reacting with the Plasmodium falciparum merozoite surface protein-4 (MSP4) with protection against clinical malaria was investigated in a Senegalese community living in an area of moderate, seasonal malaria transmission. Blood samples were collected at the end of an 8-month long dry season without any recorded parasite transmission from 206 residents enrolled in a prospective follow-up study...
October 14, 2017: Vaccine
https://www.readbyqxmd.com/read/29035857/humoral-response-of-mice-infected-with-toxocara-canis-following-different-infection-schemes
#7
Jan Novák, Lucie Panská, Tomáš Macháček, Libuše Kolářová, Petr Horák
The study was focused on the dynamics of humoral response to Toxocara canis excretory-secretory antigens (TES antigens) in mice experimentally infected by T. canis L3 larvae in different ways. In particular, we compared the effect of infection with two doses of 1000 larvae vs. repeated infections with a low number of larvae (daily infection with 10 larvae and weekly infection with 100 larvae in the course of 22 weeks). In ELISA, all infections, including both schemes with lower larval doses, elicited significant antibody response...
December 20, 2017: Acta Parasitologica
https://www.readbyqxmd.com/read/29031045/structural-characterization-of-the-man5-glycoform-of-human-igg3-fc
#8
Ishan S Shah, Scott Lovell, Nurjahan Mehzabeen, Kevin P Battaile, Thomas J Tolbert
Immunoglobulin G (IgG) consists of four subclasses in humans: IgG1, IgG2, IgG3 and IgG4, which are highly conserved but have unique differences that result in subclass-specific effector functions. Though IgG1 is the most extensively studied IgG subclass, study of other subclasses is important to understand overall immune function and for development of new therapeutics. When compared to IgG1, IgG3 exhibits a similar binding profile to Fcγ receptors and stronger activation of complement. All IgG subclasses are glycosylated at N297, which is required for Fcγ receptor and C1q complement binding as well as maintaining optimal Fc conformation...
December 2017: Molecular Immunology
https://www.readbyqxmd.com/read/29028827/p-falciparum-infection-and-maternofetal-antibody-transfer-in-malaria-endemic-settings-of-varying-transmission
#9
Alistair R D McLean, Danielle Stanisic, Rose McGready, Kesinee Chotivanich, Caroline Clapham, Francesca Baiwog, Mupawjay Pimanpanarak, Peter Siba, Ivo Mueller, Christopher L King, François Nosten, James G Beeson, Stephen Rogerson, Julie A Simpson, Freya J I Fowkes
INTRODUCTION: During pregnancy, immunoglobulin G (IgG) is transferred from the mother to the fetus, providing protection from disease in early infancy. Plasmodium falciparum infections may reduce maternofetal antibody transfer efficiency, but mechanisms remain unclear. METHODS: Mother-cord paired serum samples collected at delivery from Papua New Guinea (PNG) and the Thailand-Myanmar Border Area (TMBA) were tested for IgG1 and IgG3 to four P. falciparum antigens and measles antigen, as well as total serum IgG...
2017: PloS One
https://www.readbyqxmd.com/read/29021402/hiv-exposed-infants-vaccinated-with-a-mf59-rgp120-vaccine-have-higher-magnitude-anti-v1v2-igg-responses-than-adults-immunized-with-the-same-vaccine
#10
Erin P McGuire, Youyi Fong, Christopher Toote, Coleen K Cunningham, Elizabeth J McFarland, William Borkowsky, Susan Barnett, Hannah L Itell, Amit Kumar, Glenda Gray, M Julianna McElrath, Georgia D Tomaras, Sallie R Permar, Genevieve G Fouda
In the RV144 vaccine trial, IgG responses against the HIV envelope variable loops 1 and 2 (V1V2) were associated with decreased HIV acquisition risk. We previously reported that infants immunized with a MF59 adjuvanted rgp120 vaccine developed higher magnitude anti-V1V2 IgG responses than adult RV144 vaccinees. To determine if the robust antibody response in infants is due to differences in vaccine regimens or to inherent differences between the adult and infant immune systems, we compared Env-specific IgG responses in adults and infants immunized with the same MF59 and Alum adjuvanted HIV envelope vaccines...
October 11, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29016339/synthetic-antigens-derived-from-plasmodium-falciparum-sporozoite-liver-and-blood-stages-naturally-acquired-immune-response-and-human-leukocyte-antigen-associations-in-individuals-living-in-a-brazilian-endemic-area
#11
Lilian Rose Pratt-Riccio, Daiana De Souza Perce-Da-Silva, Josué Da Costa Lima-Junior, Evelyn Kety Pratt Riccio, Marcelo Ribeiro-Alves, Fátima Santos, Mércia Arruda, Daniel Camus, Pierre Druilhe, Joseli Oliveira-Ferreira, Cláudio Tadeu Daniel-Ribeiro, Dalma Maria Banic
Peptide vaccine strategies using Plasmodium-derived antigens have emerged as an attractive approach against malaria. However, relatively few studies have been conducted with malaria-exposed populations from non-African countries. Herein, the seroepidemiological profile against Plasmodium falciparum of naturally exposed individuals from a Brazilian malaria-endemic area against synthetic peptides derived from vaccine candidates circumsporozoite protein (CSP), liver stage antigen-1 (LSA-1), erythrocyte binding antigen-175 (EBA-175), and merozoite surface protein-3 (MSP-3) was investigated...
September 18, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28991911/associations-between-an-igg3-polymorphism-in-the-binding-domain-for-fcrn-transplacental-transfer-of-malaria-specific-igg3-and-protection-against-plasmodium-falciparum-malaria-during-infancy-a-birth-cohort-study-in-benin
#12
Celia Dechavanne, Sebastien Dechavanne, Ibrahim Sadissou, Adjimon Gatien Lokossou, Fernanda Alvarado, Magalie Dambrun, Kabirou Moutairou, David Courtin, Gregory Nuel, Andre Garcia, Florence Migot-Nabias, Christopher L King
BACKGROUND: Transplacental transfer of maternal immunoglobulin G (IgG) to the fetus helps to protect against malaria and other infections in infancy. Recent studies have emphasized the important role of malaria-specific IgG3 in malaria immunity, and its transfer may reduce the risk of malaria in infancy. Human IgGs are actively transferred across the placenta by binding the neonatal Fc receptor (FcRn) expressed within the endosomes of the syncytiotrophoblastic membrane. Histidine at position 435 (H435) provides for optimal Fc-IgG binding...
October 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28975104/proliferative-glomerulonephritis-with-monoclonal-igg-deposits-an-unusual-cause-of-de-novo-disease-in-kidney-allograft
#13
Sabiha M Hussain, Kalathil K Sureshkumar
BACKGROUND: Proliferative glomerulonephritis with monoclonal IgG deposits (PGNMID) is a newly described and rare entity that can develop in native and very rarely in transplanted kidneys. We present a patient who developed de novo PGNMID in the kidney allograft along with a review of the literature. CASE PRESENTATION: A 38-year old female with type 1 diabetes who underwent successful simultaneous pancreas-kidney (SPK) transplantation 6 years earlier presented with rising serum creatinine, nephrotic range proteinuria and microhematuria...
July 2017: Journal of Nephropathology
https://www.readbyqxmd.com/read/28965920/selection-and-validation-of-antibody-clones-against-igg-and-iga-subclasses-in-switched-memory-b-cells-and-plasma-cells
#14
Elena Blanco, Martin Perez-Andres, Luzalba Sanoja-Flores, Marjolein Wentink, Ondrej Pelak, Marta Martín-Ayuso, Georgiana Grigore, Juan Torres-Canizales, Eduardo López-Granados, Tomas Kalina, Mirjam van der Burg, Sonia Arriba-Méndez, Santiago Santa Cruz, Noemí Puig, Jacques J M van Dongen, Alberto Orfao
The clinical value of assessing immunoglobulin (Ig)G and IgA subclasses in addition to the isotypes of soluble Igs in serum has been well established. >20years ago, the International Union of Immunological Societies and the World Health Organization performed collaborative studies in order to validate antibody (Ab) clones for the detection of IgG and IgA subclasses for a broad range of laboratory assays, except for flow cytometry. Here we analyzed the performance of commercially available Ab clones to detect IgG and IgA subclasses in memory B-cells and plasma cells (PCs) by flow cytometry...
September 28, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28953967/malaria-induced-interferon-%C3%AE-drives-the-expansion-of-tbethi-atypical-memory-b-cells
#15
Nyamekye Obeng-Adjei, Silvia Portugal, Prasida Holla, Shanping Li, Haewon Sohn, Abhijit Ambegaonkar, Jeff Skinner, Georgina Bowyer, Ogobara K Doumbo, Boubacar Traore, Susan K Pierce, Peter D Crompton
Many chronic infections, including malaria and HIV, are associated with a large expansion of CD21-CD27- 'atypical' memory B cells (MBCs) that exhibit reduced B cell receptor (BCR) signaling and effector functions. Little is known about the conditions or transcriptional regulators driving atypical MBC differentiation. Here we show that atypical MBCs in malaria-exposed individuals highly express the transcription factor T-bet, and that T-bet expression correlates inversely with BCR signaling and skews toward IgG3 class switching...
September 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28919435/ultrasensitive-and-rapid-immuno-detection-of-human-ige-anti-therapeutic-horse-sera-using-an-electrochemical-immunosensor
#16
Isis C Prado, André L A Souza, David W Provance-Jr, Ricardo J Cassella, Salvatore G De-Simone
Antivenom allergy disease mediated by patient IgE is an important public health care concern. To improve detection of hypersensitive individuals prior to passive antibody therapy, an amperometric immunosensor was developed to detect reactive human IgE. Whole horse IgG3 (hoIgG3) was immobilized onto the surface of carbon or gold screen-printed electrodes through a cross-linking solution of glutaraldehyde on a chitosan film. Sera from persons with a known allergic response to hoIgG3 or non-allergic individuals was applied to the sensor...
September 14, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/28917537/hbcag-produced-in-transgenic-tobacco-triggers-th1-and-th2-response-when-intramuscularly-delivered
#17
Marcin Pyrski, Anna Rugowska, Kamil Robert Wierzbiński, Anna Kasprzyk, Maria Bogusiewicz, Piotr Bociąg, Sławomir Samardakiewicz, Marcin Czyż, Maciej Kurpisz, Tomasz Pniewski
Hepatitis B core Antigen (HBcAg) assembled into Capsid-Like Particles (CLPs) is investigated as a therapeutic vaccine in treatment of chronic hepatitis B (CHB) and in diagnostic tests or as a carrier for various epitopes. While the expression of HBcAg has been thoroughly clarified in E. coli and yeast, it has also been investigated in other expression systems. Stably transformed tobacco expressed HBcAg at a level of 110-250µg/g fresh weight, therefore in view of its large leaf biomass it offers a production platform comparable with transient expression systems regarding the final yield of HBcAg...
September 13, 2017: Vaccine
https://www.readbyqxmd.com/read/28912097/igg-subclasses-quantitation-analytical-performance-of-the-binding-site-spaplus%C3%A2-human-assay-and-comparison-with-siemens-bnii%C3%A2-assay
#18
Ana Sarnago, Rosa M Pascual, María J Moreno, Begoña Laíz, Oscar Fuster
OBJECTIVES: Accurate evaluation of analyzers is highly recommended before these devices are broadly introduced for routine testing. Concerning quantification of IgG subclasses (IgGSc), standardization has not yet been reached and thus different assays might lead to different results. Here we report the analytical performances of The Binding Site (TBS) SPAPLUS® human IgGSc assay and the concordance with the Siemens BNII® human IgGSc assay. DESIGN AND METHODS: We evaluated precision, LoB, LoD and linearity of TBS SPAPLUS® human IgGSc immunoassay...
September 11, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28883824/natural-killer-nk-cell-education-differentially-influences-hiv-antibody-dependent-nk-cell-activation-and-antibody-dependent-cellular-cytotoxicity
#19
REVIEW
Nicole F Bernard, Zahra Kiani, Alexandra Tremblay-McLean, Sanket A Kant, Christopher E Leeks, Franck P Dupuy
Immunotherapy using broadly neutralizing antibodies (bNAbs) endowed with Fc-mediated effector functions has been shown to be critical for protecting or controlling viral replication in animal models. In human, the RV144 Thai trial was the first trial to demonstrate a significant protection against HIV infection following vaccination. Analysis of the correlates of immune protection in this trial identified an association between the presence of antibody-dependent cellular cytotoxicity (ADCC) mediated by immunoglobulin G (IgG) antibodies (Abs) to HIV envelope (Env) V1/V2 loop structures and protection from infection, provided IgA Abs with competing specificity were not present...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28881485/indices-of-anti-dengue-immunoglobulin-g-subclasses-in-adult-mexican-patients-with-febrile-and-hemorrhagic-dengue-in-the-acute-phase
#20
Araceli Posadas-Mondragón, José Leopoldo Aguilar-Faisal, Adolfo Chávez-Negrete, Edith Guillén-Salomón, Verónica Alcántara-Farfán, Lucero Luna-Rojas, Amanda Marineth Ávila-Trejo, Judith Del Carmen Pacheco-Yépez
Heterologous secondary infections are at increased risk of developing dengue hemorrhagic fever (DHF) because of antibody-dependent enhancement (ADE). IgG subclasses can fix and activate complement and bind to Fcɣ receptors. These factors may also play an important role in the development of ADE and thus in the pathogenesis of DHF. The aim of this study was to analyze the indices of anti-dengue IgG subclasses in adult patients with febrile and hemorrhagic dengue in the acute phase. In 2013, 129 patients with dengue fever (DF) and 57 with DHF in Veracruz, Mexico were recruited for this study and anti-dengue IgM and IgG determined by capture ELISA...
October 2017: Microbiology and Immunology
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