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Journal of Immunoassay & Immunochemistry

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https://www.readbyqxmd.com/read/28521601/significance-of-pregnancy-test-false-negative-results-due-to-elevated-levels-of-%C3%AE-core-fragment-hcg
#1
Sarah Johnson, Saji Eapen, Peter Smith, Graham Warren, Michael Zinaman
Very high levels of β-core fragment human chorionic gonadotrophin (βcf-hCG) are reported to potentially cause false negative results in point-of-care (POC)/over-the-counter (OTC) pregnancy tests. To investigate this further, women's daily early morning urine samples, collected prior to conception and during pregnancy, were analysed for intact, free β- and βcf-hCG. The proportion of βcf-hCG was found to be related to that of hCG produced and in circulation. Therefore, best practice for accuracy testing of POC/OTC pregnancy tests would be to test devices against clinical samples containing high levels of βcf-hCG as well as standards spiked with biologically relevant ratios...
May 19, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28475466/an-immunochromatographic-assay-for-rapid-detection-of-salvinorin-a
#2
Madan Kumar Paudel, Osamu Shirota, Seiichi Sakamoto, Satoshi Morimoto, Hiroyuki Tanaka
We developed an immunochromatographic assay (ICA) that enables rapid analysis of salvinorin A (Sal A) in Salvia divinorum within 10 min. The result shows that no Sal A in other samples of Lamiaceae plants was detected, but it could recognize Sal A among other substances in complex samples. The main advantage of the ICA is its high performance in combination with low cost, simplicity, and speed. Our newly developed combined ICA/indirect competitive ELISA(icELISA) system enables analysis of large numbers of samples over short periods of time without cumbersome pretreatments in complex mixtures...
May 5, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28422565/ascorbic-acid-deficiency-in-patients-with-lichen-planus
#3
Ilinca Nicolae, Cristina Iulia Mitran, Madalina Irina Mitran, Corina Daniela Ene, Mircea Tampa, Simona Roxana Georgescu
OBJECTIVES: Recent studies have highlighted the role of oxidative stress in the pathogenesis of lichen planus (LP). In the present study, the interest of the authors is focused on the investigation of ascorbic acid status in patients with LP and identification of parameters that might influence the level of this vitamin. MATERIAL AND METHOD: We analyzed the level of urinary ascorbic acid (reflectometric method) in 77 patients with LP (cutaneous LP (CLP)-49 cases; oral LP (OLP)-28 cases) and 50 control subjects...
April 19, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28422564/evaluation-of-two-in-house-immunoenzymatic-tests-to-serodiagnose-subclinical-paratuberculisis-in-a-sheep-flock-in-mexicali-valley-mexico
#4
Elizama Ponce Barraza, Tomás Cárdenas Reyna, Carlos Angulo, José Carlomán Herrera Ramírez, Gilberto V López, Gerardo Enrique Medina-Basulto, Shigetoshi Eda, Sawako Hori-Oshima
Paratuberculosis (PTB) or Johne's disease is a common ruminant infectious disease caused by Mycobacterium avium subsp. paratuberculosis (MAP). In this study, two MAP antigens were compared for their diagnostic utility to detect subclinical PTB in a sheep flock in Mexicali, Mexico. Sheep (n = 31) without clinical signs but positive on a direct fecal-polymerase chain reaction were tested with two preabsorbed in-house enzyme linked immunosorbent assays (ELISAs) using: (1) an ethanol-extracted surface lipid antigen (EVELISA) and (2) a protoplasmic antigen (ELISA-PPA)...
April 19, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28421869/alk-protein-expression-in-pulmonary-adenocarcinoma-of-tunisian-patients
#5
Amira Toumi Arfaoui, Ahlem Blel, Aloui Raoudha, Fatnassi Ghaya, Ben Ammar Jihane, Nadia Znaidi, Yosra Zidi, Mohammed Sadok Boudaya, Hichem Aouina, Rammeh Rommani Soumaya
BACKGROUND: It is now necessary to determine ALK status in order to use targeted therapy. AIM: herein, we assess immunohistochemical profile of ALK protein in a series of Tunisian patients with pulmonary adenocarcinoma. MATERIALS AND METHODS: ALK protein expression was studied applying the D5F3 antibody with a fully automated Ventana CDx technique on a series of 19 patients. RESULTS: Positive ALK expression was found in one case (5...
April 19, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28421864/selfie-autoimmunity-boon-or-bane
#6
Haseeb Ahsan
The immune system provides protection to tissues damaged by infectious microrganisms or physical damage. In autoimmune diseases, the immune system recognizes and attacks its own tissues, i.e., self-destruction. Various agents such as genetic factors and environmental triggers are thought to play a major role in the development of autoimmune diseases. A common feature of all autoimmune diseases is the presence of autoantibodies and inflammation, including mononuclear phagocytes, autoreactive T lymphocytes, and autoantibody producing B cells (plasma cells)...
April 19, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28318369/high-rate-of-hepatitis-b-virus-infection-among-hairdressers-in-ibadan-nigeria
#7
B A Olusola, E A Gometi, O Ogunsemowo, D O Olaleye, G N Odaibo
Hepatitis B virus (HBV) infection is a major public health problem for over two billion people infected globally. Occupationally exposed persons are at high risk of HBV infection and, apart from medical personnel, there is dearth of information concerning the prevalence and awareness of HBV among this population in Nigeria. This study was designed to determine the levels of HBV awareness and prevalence of HBV infection among hairdressers in Ibadan, Nigeria. Hairdressers and teachers (unmatched controls) in four local government areas in Ibadan were tested for HBV infection using ELISA technique...
March 20, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28436708/a-novel-in-vitro-elisa-for-estimation-of-glycoprotein-content-in-human-rabies-vaccines
#8
Shukra M Aavula, Gontu Abhinay, Sridevi V Nimmagadda, Kapil Maithal
In vitro methods for quantification of immunodominant glycoprotein in the rabies vaccine formulations serve as good alternative to the cumbersome and variable mice potency assay as a batch release test for the vaccine. The present study presents the development of a sandwich ELISA with optimal concentrations of a high affinity recombinant diabody (D06) and a specific monoclonal antibody (M5B4) against rabies glycoprotein for its quantification in the vaccine formulations. The glycoprotein estimate correlated linearly (r(2) = 0...
February 15, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28375073/myositis-non-inflammatory-mechanisms-an-up-dated-review
#9
Emilia Manole, Alexandra E Bastian, Niculina Butoianu, Hans H Goebel
Idiopathic inflammatory myopathies (IIM) represent a heterogeneous group of rare muscular diseases, with no clearly known causes. IIM frequently have an incomplete response to treatment due to the difficulty in distinguishing between IIM forms, and due to neglect their non-inflammatory causes. Important data concerning non-immune mechanisms in IIM pathology have been recently accumulated. There is a correlation between inflammatory and non-inflammatory mechanisms, but their involvement in IIM pathogenesis is still unknown...
2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28102778/highlights-of-new-immunoassay-based-technologies
#10
EDITORIAL
Cristiana Tanase, Radu Albulescu, Monica Neagu
No abstract text is available yet for this article.
2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/27797300/a-new-covalent-peroxidase-conjugation-method-using-bis-sulfosuccinimidyl-suberate-as-cross-linking-reagent-in-a-two-step-procedure
#11
Rivo Presentini
A new method has been developed to prepare horseradish peroxidase (HRP) conjugates using bis(sulfosuccinimidyl)suberate (BS3) as cross-linking reagent in a two-step procedure. The enzyme is reacted with BS3, introducing active ester molecules into the enzyme itself, and it is then used directly to label amino-containing compounds without further treatment. The proteins involved in the conjugation undergo minimal modifications. The reaction conditions are evaluated, as well as studies on the conservation of the biological activities of the conjugated proteins and the stability of the conjugates in time...
2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/27624975/selection-of-specific-inhibitor-peptides-in-enzyme-linked-immunosorbent-assay-elisa-of-cardiac-troponin-i-using-immuno-dominant-epitopes-as-competitor
#12
Majid Asiabanha Rezaee, Mohammad Javad Rasaee, Javad Mohammadnejad
Human cardiac troponin I (cTni) is the gold marker for early diagnosis of myocardial infarction. In this regard, four immune-dominant epitopes of cTni were predicted and their 3D structures were determined. Thereafter, the competitive performance of the peptides was monitored with the developed polyclonal antibody-based indirect competitive ELISA; a half-maximal inhibitory concentration (IC50) of 0.49 (µg/mL) and detection limit of 0.037 (µg/mL) were achieved for recombinant cTni. The competitive ELISA determined sensitivity levels of 0...
2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/27617501/c3-ch50-ratio-as-a-proposed-composite-marker-for-eculizumab-monitoring-in-atypical-hemolytic-uremic-syndrome-preliminary-results
#13
Kheir Eddine Kerboua, Fatma Haiba, Djamila Batouche
Treatment of atypical hemolytic uremic syndrome (aHUS) by the complement C5 inhibitor eculizumab (Soliris®) is highly effective but unfortunately, associated with an economic pressure on the health care systems even in high incomes countries. Despite spacing infusions having been proposed as the unique solution to minimize this economic impact, no reliable laboratory assays are available to tailor such therapy optimization. We aimed to propose and evaluate a complement composite marker for eculizumab efficacy monitoring in aHUS...
2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/27611231/quantitation-of-igg-kappa-and-igg-lambda-in-the-cerebrospinal-fluid-by-sandwich-elisa-method
#14
David Zeman, Pavlína Kušnierová, Jana Bojková, František Všianský, Olga Zapletalová
IgG kappa and IgG lambda concentrations were quantified in 96 paired CSF and sera using Hevylite™ antibodies in an in-house developed sandwich ELISA method. In 56 of these samples, the results were compared with a qualitative isoelectric focusing/affinity-mediated immunoblotting assay for oligoclonal IgG kappa and IgG lambda. Normal IgG kappa/lambda ratio in the CSF was the same as in serum. In 19/33 patients with intrathecal oligoclonal IgG synthesis, skewed IgG kappa/lambda ratio was observed (increased in 16 and decreased in 3 cases)...
2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/27494045/development-and-application-of-dot-enzyme-linked-immunosorbent-dot-elisa-assay-for-detection-of-brucella-melitensis-and-evaluation-of-the-shedding-pattern-in-infected-goats
#15
Opeyemi Mayowa Onilude, Sabri Mohd Yusoff, Benjamin Obukowho Emikpe, Polycarp Tanko, Salisi M Shahrom, Mohammed Effendy
Early and accurate diagnosis of Brucella melitensis is essential for the treatment and control of brucellosis both in animals and humans. The thrust for the development of a rapid diagnostic technique to overcome the limitations of conventional microbiological and serological tests brought about this investigation on the development and application of dot-ELISA for antigen and antibody detection in infected goats. Fifteen apparently healthy Boer aged 2-3 years which tested negative for brucellosis using PCR and ELISA, were grouped into A (10 goats infected intraocularly with 10(7) CFU of B...
2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/27471881/the-diagnostic-importance-of-the-bronchoalveolar-lavage-in-lymphocytic-alveolitis
#16
Mona Mlika, Nourane Kria, Emna Braham, Chokri Chebbi, Faouzi El Mezni
Multidisciplinary concertation is mandatory in order to assess interstitial pneumonias. The study of the bronchoalveolar lavage helps evoking a diagnosis according to the lavage profile. In lymphocytic alveolitis, immunocytochemistry, or in flux cytometry are necessary in order to identify the different clusters of lymphocytes implicated. Our objective was to evaluate the profile of 31 lymphocytic alveolitis using 2 different techniques which are the immunocytochemistry and the in flow cytometry in order to evaluate the efficacy of each technique and to compare the different results to the final diagnoses...
2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/27454420/a-quantitative-enzyme-linked-immunosorbent-assay-for-quantification-of-secretory-immunoglobulin-a-in-serum
#17
Jaime Pérez-Griera, Juan Carlos Andreu-Ballester, Alejandro Hueso Zarandieta, José García de la Asunción, Silvia Masquefa Bondia
Secretory immunoglobulin A (SIgA) in serum is possibly the best index of SIgA presence in mucosal secretions in digestive tract and the mirror of its immunologic barrier against many pathogenic aggressions. The measurement of salivary SigA alone may be affected by total salivary secretion and its final concentration in the gland lumen is probably not useful as an appropriate index of mucosal secretions in the digestive tract. The usefulness of the determination of SigA against various epitopes in serum from patients with various autoimmune disease has been demonstrated...
2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/27454259/significance-of-immune-response-to-mycobacterium-tuberculosis-culture-filtrate-protein-antigens-in-cerebrospinal-fluid-of-tuberculous-meningitis-patients-a-search-for-diagnostic-marker
#18
Prashant Giribhattanavar, Kavitha Kumar, Siddarth Raajasekar, Nagarathna Chandrashekar, Shripad A Patil
Mycobacterium tuberculosis (H37Ra) culture filtrate proteins (CFP) are explored as a diagnostic marker for tuberculous meningitis (TBM). Cerebrospinal fluid (CSF) samples from patients were categorized as confirmed (n = 47), suspected (n = 20), and non-TBM (n = 25) cases. Immune response by Western blot revealed TBM CSF samples are having heterogeneous response to CFP. CFP ELISA was 92% sensitive and 38.30% specific. ODs of confirmed TBM and non-TBM cases were significantly different (P < 0.0001) and also the suspected TBM and non-TBM cases (P = 0...
2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/27404490/development-of-recombinant-matrix-metalloproteinase-3-based-sandwich-elisa-for-sero-diagnosis-of-canine-mammary-carcinomas
#19
Mamta Pandey, B V Sunil Kumar, Satparkash Singh, Ramneek Verma
Matrix metalloproteinase-3 is invariably upregulated in cancerous condition. So we aimed to determine serum level of MMP-3 in canine mammary tumors. The gene was expressed in E. coli system as ~43kDa recombinant protein, which was refolded, purified, and confirmed. Hyperimmune serum was raised against the expressed protein in rabbits and mice to standardize sandwich ELISA. ROC analysis revealed largest area under the curve of 0.998 with sensitivity (100%) and specificity (95%) for a cut-off value of 0.363 with respect to histopathological staining...
2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/27379831/silencing-of-epidermal-growth-factor-latrophilin-and-seven-transmembrane-domain-containing-protein-1-eltd1-via-sirna-induced-cell-death-in-glioblastoma
#20
Florentina Serban, Oana Daianu, Ligia Gabriela Tataranu, Stefan-Alexandru Artene, Ghazaleh Emami, Ada Maria Georgescu, Oana Alexandru, Stefana Oana Purcaru, Daniela Elise Tache, Maria Mihaela Danciulescu, Veronica Sfredel, Anica Dricu
The failure of therapies targeting tumor angiogenesis may be caused by anti-angiogenic resistance mechanisms induced by VEGF and non-VEGF pathways alterations. Anti-angiogenic therapy failure is also attributed to immune system, acting by tumor-associated macrophages that release pro-angiogenic factors and a consequent increase of blood vessels. Recently, in a study by Rheal et al., a new angiogenic receptor, epidermal growth factor, latrophilin, and 7 trans-membrane domain-containing protein 1 on chromosome 1(ELTD1) has been identified as a promising glioma biomarker...
2017: Journal of Immunoassay & Immunochemistry
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