Enzyme linked immune assay

Fig. 15 Induction of cellular immunity by subcutaneous immunization with OVA-encapsulating y-PGA-Phe nanoparticles. Mice were subcutaneously immunized one time with OVA alone (10 pg), 10 pg of OVA and 100 pg of NPs (OVA-NPs), 10 pg of OVA and 100 pL of complete Freund s adjuvant (OVA + CFA), or PBS (control). Splenocytes were obtained from the immunized mice on day 10 after the immunization and stimulated with the OVA peptide. The number of IFN-y-producing cells was measured by enzyme-linked immunospot assay. SFU spot forming units...

Wilson, S.D., Munson, A.E. and Meade, B.J., Assessment of the functional integrity of the humoral immune response the plaque-forming cell assay and the enzyme-linked immunosorbent assay, Methods, 19, 3, 1999. 

Immune detection is a key utility of antibodies in biotechnology [3, 5]. Antiden-drimer sera efficiently detect dendrimers in multiple assay formats, including enzyme-linked immunosorbent assays (ELISA), and in Western and dot blots [3, 5], ELISA assays are commonly used to quantitate proteins, and a quantitative ELISA could be developed for dendrimers using our sera, though doing so would require development of dendrimer standards of known concentration that could be used for calibration. 

When rabbits were immunized with the glycoconjugates suspended in Freund s complete adjuvant antibodies with specificity for the haptenic disaccharides were produced, as estimated in passive hemagglutination and complement-mediated bactericidal tests, and enzyme-linked immunosorbent assay (ELISA) (12-15). 

Holmgren, J. Svennerholm, A.-M. Enzyme-linked immunosorbent assays for cholera serology. Infect. Immun., 1973, 5., 662-667. 

Cytokines, which are protein mediators produced by immune cells, are involved in the regulation of cell activation, growth and differentiation, inflammation, and immunity. Measurement of cytokine production, as determined by techniques such as bioassay, radioimmunoassay, and enzyme-linked immunosorbent assay, has been used to examine various immune functions. 

AIDS acquired immune deficiency syndrome ELISA enzyme-linked immunosorbent assay... 

A partially purified Bacillus thurlnglensis var. israelensls (Bti) 6-endotoxin was used to Immunize rabbits. The antisera obtained have an improved specificity towards the mosquito larvacidal activity of the toxin, as opposed to antiserum raised when the whole crystal was used as immunogen. Using a two step/indirect ELISA (enzyme linked immunosorbent assay) procedure developed in our laboratory, fourteen experimental formulations were tested, and the results were compared with bioassays. An average of 69.1 international units 20% c.v. was found to associate with each ug of toxin detected by the ELISA. Our data indicate that when toxin specific antisera are available, Immunoassays can be used to predict the biological activity of Bti samples with reasonable accuracy. 

A merging of chemistry and biology is essential to effectively probe the immune system for catalytic antibodies (Fig. 3). Haptens that are successful in eliciting catalytic antibodies are variations of the central theme that transition state stabilization in the antibody combining site will yield functional catalysts for a desired chemical reaction. The evolution of hapten design will be discussed further in subsequent sections. Once the hapten is selected and synthesized, it is attached to an immunogenic carrier protein, usually via an amide bond, for hyperimmunization. A preliminary screen for antibodies that bind the hapten using an enzyme-linked immunosorbent assay (ELISA) is followed by another screen for catalysis of the reaction for which the hapten... 

Female, New Zealand white rabbits were each immunized with an emulsion of the methoprene immunogen (200 fig per animal, 53 molecules of methoprene per molecule of protein) in 250 fib phosphate buffered saline and 250 fib Freund s complete adjuvant. A booster shot of the immunogen (200 fig per animal) in Freund s incomplete adjuvant was given to each animal one month after the initial immunization and again two weeks after the first booster shot. Rabbit anti-methoprene antiserum was collected and used to develop a competition enzyme-linked immunosorbent assay or cELISA for methoprene. 

Immunoassays offer much potential for rapid screening and quantitative analysis of pesticides in food and environmental samples. However, despite this potential, the field is still dominated by conventional analytical approaches based upon chromatographic and spectrometric methods. We examine some technical barriers to more widespread adoption and utilization of immunoassays, including method development time, amount of information delivered and inexplicable sources of error. Examples are provided for paraquat in relation to exposure assessment in farmworkers and food residue analyses molinate in relation to low-level detection in surface waters and bentazon in relation to specificity and sensitivity requirements built in to the immunizing antigen. A comparison of enzyme-linked immunosorbent assay (ELISA) results with those obtained from conventional methods will illustrate technical implementation barriers and suggest ways to overcome them. 

Antibody responses in immunized animals were assayed for anti-MSP-ljp antibodies by microplate enzyme-linked immunosorbent assay (ELISA). 

Holmstrom et al. (1989b) evaluated the long-term inhalation effects of formaldehyde exposure to immune function in female Sprague-Dawley rats exposed to 12.6 ppm formaldehyde for 6 hours/day, 5 days/week for 22 months. After 22 months of formaldehyde exposure, the rats were inoculated subcutaneously with Pneumovax (Merck Sharpe and Dohme) and antitetanus vaccine (National Bacteriological Laboratory). Animals were sacrificed at 21-25 days after vaccination. Blood samples were collected from each animal before vaccination and just prior to sacrifice. Tlie blood was analyzed for response to Pneumovax and tetanus vaccination using an enzyme-linked immunosorbant assay technique. The results indicated... 

---