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Immunodiagnostics

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https://www.readbyqxmd.com/read/28630382/immunodiagnostic-value-of-echinococcus-granulosus-recombinant-b8-1-subunit-of-antigen-b
#1
Amir Savardashtaki, Bahador Sarkari, Farzane Arianfar, Zohreh Mostafavi-Pour
BACKGROUND: Cystic echinococcosis (CE), as a chronic parasitic disease, is a major health problem in many countries. The performance of the currently available serodiagnostic tests for the diagnosis of CE is unsatisfactory. OBJECTIVE: The current study aimed at sub-cloning a gene, encoding the B8/1 subunit of antigen B (AgB) from Echinococcus granulosus, using gene optimization for the immunodiagnosis of human CE. METHODS: The coding sequence for AgB8/1 subunit of Echinococcus granulosus was selected from GenBank and was gene-optimized...
June 2017: Iranian Journal of Immunology: IJI
https://www.readbyqxmd.com/read/28622862/identification-of-lawsonia-intracellularis-putative-hemolysin-protein-a-and-characterization-of-its-immunoreactivity
#2
Jehyung Kim, Gayeon Won, Suyeon Park, John Hwa Lee
Despite the recent global increase in fatal endemic outbreaks of proliferative enteropathy (PE) caused by the obligate intracellular bacterium Lawsonia intracelluralis (LI) in the swine industry, development of effective prevention strategies or immunodiagnostic tests has been delayed due to the difficulty of cultivating this pathogen in vitro. Although several genetic analyses have been performed at the level of gene transcription after the complete genome sequence of LI was made available, the mechanism of LI infection and virulence genes remain unidentified...
June 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28620259/standardization-of-dot-enzyme-linked-immmunosorbent-assay-for-the-diagnosis-of-bovine-visceral-schistosomiasis
#3
Kommu Sudhakar, G S Sreenivasa Murthy, Gaddam Rajeshwari
AIM: Bovine visceral schistosomiasis has been reported as an important disease entity as it affects animal health, productivity, causes economic losses due to liver condemnation, and produces a high morbidity. This study was conducted to standardize an easy, reliable dot-enzyme-linked immmunosorbent assay (ELISA) for the diagnosis of visceral schistosomiasis caused by Schistosoma spindale and to know the prevalence rate in and around Hyderabad. MATERIALS AND METHODS: A dot-ELISA was standardized in the laboratory using whole worm antigen (WWA) and excretory-secretory antigen (ESA) of S...
May 2017: Veterinary World
https://www.readbyqxmd.com/read/28606321/characterization-of-glutathione-s-transferase-and-its-immunodiagnostic-potential-for-detecting-taenia-multiceps
#4
Ying Sun, Yu Wang, Xing Huang, Xiaobing Gu, Weimin Lai, Xuerong Peng, Guangyou Yang
Taenia multiceps is a widespread zoonotic tapeworm parasite which infects cloven-hoofed animals around the world. Animal infection with Coenurus cerebralis, the coenurus larvae of T. multiceps (Tm), is often fatal, which is a major cause of economic losses in stockbreeding. This study amplified the glutathione S-transferase (GST) gene from the total RNA of C. cerebralis. The resulting protein, Tm-GST, consisted of 201 amino acids, and had a predicted molecular mass of 23.1kDa. Its amino acid sequence shares 77...
August 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28588575/gut-associated-lymphoid-tissue-a-key-tissue-inside-the-mucosal-immune-system-of-hens-immunized-with-escherichia-coli-f4
#5
Maria F Peralta, Alejandra Magnoli, Fabrisio Alustiza, Armando Nilson, Raúl Miazzo, Adriana Vivas
Immunoglobulin Y (IgY) is the predominant antibody found in hen's (Gallus domesticus) egg yolk. This antibody, developed against several microorganisms in hen egg yolk, has been successfully used as an alternative to immunoglobulins from mammals for use in immunodiagnostics and immunotherapy. Enteropathogenic Escherichia coli (E.coli) F4 is the main etiological agent associated with swine neonatal diarrhea, and it causes notable economic losses in swine production. The aim of the present study was to evaluate the relationship between humoral immune response and the activation of gut-associated lymphoid tissue (GALT) in laying hens intramuscularly immunized with E...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28540255/comparison-and-validation-of-elisa-assays-for-plasma-insulin-like-growth-factor-1-in-the-horse
#6
Courtnay L Baskerville, Nicholas J Bamford, Patricia A Harris, Simon R Bailey
Insulin-like growth factor-1 (IGF-1) plays several important physiological roles, and IGF-related pathways have been implicated in developmental osteochondral disease and endocrinopathic laminitis. This factor is also a downstream marker of growth hormone activity and its peptide mimetics. Unfortunately, previously used assays for measuring equine IGF-1 (radioimmunoassays and ELISAs) are no longer commercially available, and many of the kits on the market give poor results when used on horse samples. The aim of the present study was to compare three different ELISA assays (two human and one horse-specific)...
2017: Open veterinary journal
https://www.readbyqxmd.com/read/28534196/in-silico-analysis-of-shiga-toxins-stxs-to-identify-new-potential-vaccine-targets-for-shiga-toxin-producing-escherichia-coli
#7
Maryam Golshani, Mana Oloomi, Saeid Bouzari
Shiga toxins belong to a family of structurally and functionally related toxins serving as the main virulence factors for pathogenicity of the Shiga toxin-producing Escherichia coli (STEC) associating with Hemolytic uremic syndrome (HUS). At present, there is no effective treatment or prevention for HUS. The aim of the present study was to find conserved regions within the amino acid sequences of Stx1, Stx2 (Shiga toxin) and their variants. In this regard, In-silico identification of conformational continuous B cell and T-cell epitopes was performed in order to introduce new potential vaccine candidates...
December 2016: In Silico Pharmacology
https://www.readbyqxmd.com/read/28502720/insights-into-the-chicken-igy-with-emphasis-on-the-generation-and-applications-of-chicken-recombinant-monoclonal-antibodies
#8
REVIEW
Warren Lee, Ali Syed Atif, Soo Choon Tan, Chiuan Herng Leow
The advantages of chicken (Gallus gallus domesticus) antibodies as immunodiagnostic and immunotherapeutic biomolecules has only been recently recognized. Even so, chicken antibodies remain less-well characterized than their mammalian counterparts. This review aims at providing a current overview of the structure, function, development and generation of chicken antibodies. Additionally, brief but comprehensive insights into current knowledge pertaining to the immunogenetic framework and diversity-generation of the chicken immunoglobulin repertoire which have contributed to the establishment of recombinant chicken mAb-generating methods are discussed...
May 11, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28473207/quantification-of-cartilage-oligomeric-matrix-protein-comp-and-a-comp-neoepitope-in-synovial-fluid-of-patients-with-different-joint-disorders-by-novel-automated-assays
#9
P Lorenzo, A Aspberg, T Saxne, P Önnerfjord
OBJECTIVE: To develop automated immunoassays for the quantification of Cartilage Oligomeric Matrix Protein (COMP) and a COMP neoepitope in synovial fluid and to investigate their diagnostic potential in different joint conditions. METHODS: Two sandwich immunoassays were developed for the quantification of COMP and a COMP neoepitope, using an automated analyser (IDS-iSYS, Immunodiagnostic Systems, Boldon, UK). Assay performance was evaluated in terms of sensitivity, recovery, linearity, and intra- and inter-assay precision...
May 2, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28404571/early-detection-of-circulating-antigen-and-igm-associated-immune-complexes-during-experimental-mycobacterium-bovis-infection-in-cattle
#10
Konstantin P Lyashchenko, Rena Greenwald, Alina Sikar-Gang, Archana A Sridhara, Ashley Johnathan, Paul Lambotte, Javan Esfandiari, Mayara F Maggioli, Tyler C Thacker, Mitchell V Palmer, W Ray Waters
The presence of circulating antigen in cattle experimentally infected with Mycobacterium bovis was demonstrated using dual-path platform (DPP) technology. The antigen capture immunoassays employed rabbit polyclonal antibody recognizing predominantly M. tuberculosis complex-specific epitopes and were able to detect soluble substances and whole cells of mycobacteria. The antigen found in serum appeared to be mostly bound to IgM, but not to IgG, within the immune complexes formed at early stages of M. bovis infection...
June 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28359828/tspka-r-a-potential-immunodiagnostic-antigen-for-the-detection-of-porcine-cysticercosis
#11
Guangxue Liu, Panhong Liang, Shaohua Zhang, Aijiang Guo, Lijie Wang, Yadong Zheng, Xuenong Luo
Cysticercosis, caused by metacestodes of Taenia solium, has a significant soci-economic impact and is of considerable importance in public health. However, there are no specific diagnostic antigens to distinguish between T. solim and Taenia hydatigena. In the present study, cAMP-dependent protein kinase regulatory subunit (TsPKA-r), an excretory/secretary (ES) antigen of T. solium, was used to establish a specific and sensitive diagnostic tool for detection of porcine cysticercosis. The full-length sequence encoding TsPKA-r was amplified by PCR, sequenced and then identified by bioinformatics...
March 28, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28341036/advanced-methodologies-in-high-throughput-sequencing-of-immune-repertoires
#12
REVIEW
Simon Friedensohn, Tarik A Khan, Sai T Reddy
In recent years, major efforts have been made to develop sophisticated experimental and bioinformatic workflows for sequencing adaptive immune repertoires. The immunological insight gained has been applied to fields as varied as lymphocyte biology, immunodiagnostics, vaccines, cancer immunotherapy, and antibody engineering. In this review, we provide a detailed overview of these advanced methodologies, focusing specifically on strategies to reduce sequencing errors and bias and to achieve high-throughput pairing of variable regions (e...
March 2017: Trends in Biotechnology
https://www.readbyqxmd.com/read/28336309/usefulness-of-the-ellipro-epitope-predictor-program-in-defining-the-repertoire-of-hla-abc-eplets
#13
Rene J Duquesnoy, Marilyn Marrari
HLA matching at the epitope level offers new opportunities to identify suitable donors for transplant patients. The International HLA Epitope Registry (www.Epregistry.com.br) describes for the various HLA loci, repertoires of eplets including those that correspond to epitopes experimentally verified with specific antibodies. There are also many eplets which have remained as theoretical entities because no informative antibodies have been found. Which of them have immunogenic potential or conversely, might be considered as non-epitopes that cannot elicit specific antibody responses? This question is important for the application of epitope-based HLA matching in clinical transplantation...
March 21, 2017: Human Immunology
https://www.readbyqxmd.com/read/28320455/a-systematic-review-of-taeniasis-cysticercosis-and-trichinellosis-in-vietnam
#14
REVIEW
Dinh Ng-Nguyen, Mark A Stevenson, Rebecca J Traub
Taeniasis, cysticercosis and trichinellosis have been ranked as the most important food-borne parasites of humans in terms of public health, socioeconomic and trade impact. Despite this, information on these food-borne zoonoses in Vietnam is scarce and fragmented, and many local reports remain inaccessible to the international research community. This study aims to conduct comprehensive literature searches to report on the incidence and estimate the true prevalence of taeniasis in humans and T. solium cysticercosis in humans and pigs in Vietnam utilizing Bayesian models; in addition, to report the incidence and the distribution of trichinellosis...
March 21, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28301944/orientation-and-characterization-of-immobilized-antibodies-for-improved-immunoassays-review
#15
Nicholas G Welch, Judith A Scoble, Benjamin W Muir, Paul J Pigram
Orientation of surface immobilized capture proteins, such as antibodies, plays a critical role in the performance of immunoassays. The sensitivity of immunodiagnostic procedures is dependent on presentation of the antibody, with optimum performance requiring the antigen binding sites be directed toward the solution phase. This review describes the most recent methods for oriented antibody immobilization and the characterization techniques employed for investigation of the antibody state. The introduction describes the importance of oriented antibodies for maximizing biosensor capabilities...
March 16, 2017: Biointerphases
https://www.readbyqxmd.com/read/28285502/potential-vaccine-targets-against-rabbit-coccidiosis-by-immunoproteomic-analysis
#16
Hongyan Song, Ronglian Dong, Baofeng Qiu, Jin Jing, Shunxing Zhu, Chun Liu, Yingmei Jiang, Liucheng Wu, Shengcun Wang, Jin Miao, Yixiang Shao
The aim of this study was to identify antigens for a vaccine or drug target to control rabbit coccidiosis. A combination of 2-dimensional electrophoresis, immunoblotting, and mass spectrometric analysis were used to identify novel antigens from the sporozoites of Eimeria stiedae. Protein spots were recognized by the sera of New Zealand rabbits infected artificially with E. stiedae. The proteins were characterized by matrix-assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF/TOF-MS) analysis in combination with bioinformatics...
February 2017: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/28245186/evaluation-of-two-fully-automated-immunoassay-based-tests-for-the-measurement-of-1%C3%AE-25-dihydroxyvitamin-d-in-human-serum-and-comparison-with-lc-ms-ms
#17
Katharina Spanaus, Arnold von Eckardstein
BACKGROUND: 1α,25-Dihydroxyvitamin D [1,25(OH)2 vitD] is the bioactive form of vitamin D. Due to the very low concentrations of 1,25(OH)2 vitD in the blood and its lipophilic character, measurement of this parameter is analytically challenging. Requiring preceding manual extraction steps before analysis, previous assays have been laborious. METHODS: In the presented study, we evaluated the performance of two immunoassays from DiaSorin and from Immunodiagnostic Systems (IDS) which combine fully automated extraction and measurement of 1,25(OH)2 vitD...
February 28, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28245183/evaluation-of-a-human-anti-mouse-antibody-rapid-test-for-patients-requiring-radio-immunodiagnostic
#18
Chloé Lamesa, Anne-Sophie Gauchez, Roseline Mazet, Luc Foroni, Daniel Fagret, Marie-Dominique Desruet
No abstract text is available yet for this article.
February 28, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28220916/magnetic-digital-microfluidics-a-review
#19
REVIEW
Yi Zhang, Nam-Trung Nguyen
A digital microfluidic platform manipulates droplets on an open surface. Magnetic digital microfluidics utilizes magnetic forces for actuation and offers unique advantages compared to other digital microfluidic platforms. First, the magnetic particles used in magnetic digital microfluidics have multiple functions. In addition to serving as actuators, they also provide a functional solid substrate for molecule binding, which enables a wide range of applications in molecular diagnostics and immunodiagnostics...
March 14, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28127366/antigenic-cross-reactivity-among-haemonchus-contortus-oesophagostomum-columbianum-and-trichuris-ovis-of-goat
#20
Ruma Jas, Joydeb Ghosh, Kinsuk DAS
BACKGROUND: Cross antigenicity is the major problem in developing a reliable tool for immunodiagnosis and immunoprophylaxis of parasitic diseases. Mixed infection due to different types of gastrointestinal parasites is more common than single species infection under field condition. METHODS: The present study was undertaken to detect antigenic cross-reactivity among Haemonchus contortus, Oesophagostomum columbianum and Trichuris ovis of goats by SDS-PAGE and western blot analysis using hyperimmune sera (HIS) rose in rabbit separately against the antigens of the three nematode species...
October 2016: Iranian Journal of Parasitology
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