The modern state, general methodologic problems and the possibilities to use in biological research the dot enzyme-linked immunosorbent assay (dot-ELISA) are analysed in the review. New types of microporous polymer membranes and equipment for the application of the solid-phase reagent and performing the assay are considered. Different variants of dot-ELISA and methods for the evaluation of results obtained in the assay as well as the ways for its optimization are discussed.
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Talanta
March 2025
Department of Biotechnology Engineering, Faculty of Engineering Science, Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel. Electronic address:
Hybridoma technology remains a cornerstone of monoclonal antibody (mAb) discovery. Classical screening practices such as ELISA, western blot, and dot blot require laborious, time-consuming procedures, rendering them inefficient in time-restricted decision-making. Additionally, due to these assays' practical and technical limitations, specificity testing of the mAbs is usually omitted during the primary screening of hybridoma libraries.
View Article and Find Full Text PDFJ Virol Methods
June 2021
Department of Laboratory Medicine, Microbiology Service, Cliniques universitaires Saint-Luc and Université Catholique de Louvain, Brussels, Belgium; Scientific Research Pole of Medical Microbiology, Institute of Experimental and Clinical Research, Université Catholique de Louvain, Brussels, Belgium. Electronic address:
Background: At present, the only reliable test for COVID-19 diagnosis is RT-qPCR. Serological assays have been widely used to increase the detection sensitivity of infected population. Hereby, we report the performance of a new pan-IgG multiplex Enzyme Immunoassay (immunodot) method for exploration of discrepant SARS-COV-2 serological results.
View Article and Find Full Text PDFJ Clin Microbiol
September 2017
The Division of Diagnostic and Applied Microbiology, Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
The group B streptococcus (GBS) capsular polysaccharide (CPS) is an important virulence factor which is also used for GBS typing. There are 10 CPS types (Ia, Ib, and II to IX). GBS that do not phenotypically type are considered nontypeable.
View Article and Find Full Text PDFPLoS One
August 2017
National HIV/HCV Reference Laboratory, National Center for AIDS/STD Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China.
Several laboratory assays on cross-sectional specimens for detecting recent HIV infections were developed, but these assays could not be applied in resource-limited and high HIV-incidence areas. This study describes the development of a rapid assay that can simultaneously detect the presence of HIV-1 antibodies of current and/or recent infection. The dot immuno-gold filtration assay (DIGFA) was used to detect recent infection on the principle of antibody avidity changes between recent and long-term infections.
View Article and Find Full Text PDFInt J Nanomedicine
September 2016
Department of Cell Biology, Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, China Medical University, Shenyang, People's Republic of China.
The large external antigen (LEA) is a cell surface glycoprotein that has been proven to be highly expressed in colorectal cancer (CRC) as a tumor-associated antigen. To evaluate and validate the relationship between LEA expression and clinical characteristics of CRC with high efficiency, LEA expression levels were detected in 85 tissue blocks from CRC patients by quantum dot-based immunohistochemistry (QD-IHC) combined with imaging quantitative analysis using quantum dots with a 605 nm emission wavelength (QD605) conjugated to an ND-1 monoclonal antibody against LEA as a probe. Conventional IHC was performed in parallel for comparison.
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