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Development of competitive ELISA for neosporosis by employing immunoproteomics
Clinical Proteomics volume 1, pages 235–248 (2004)
Abstract
In this study, proteomics was used to explore the antigenic proteins that are involved in cross-reactivity during serodiagnosis between Neospora caninum (N. caninum) and Toxoplasma gondii (T. gondii). Competitive enzyme-linked immunosorbent assay (C-ELISA) developed by proteomics shed a new light on the infection of N. caninum. Cross-reactivity of antigenic proteins between N. caninum and T. gondii tachyzoites was explored by using the conventional sodium dodecyl sulfate (SDS)-polyacrylamide gel electrophoresis (PAGE) (1-DE) and two-dimensional gel electrophoresis (2-DE) immunoblot. The proteins were identified by matrix-assisted laser desorption/ionization-time of flight mass spectrometry. The protein expression patterns in the immunoblot profiles of N. caninum were similar to bovine, chicken, and rabbit anti-N. caninum serum, but they were not similar to rabbit anti-T. gondii serum. Band at 79 kDa, HSP70, and actin on immunoblot profiles reacted, in general, with bovine, chicken, and rabbit anti-N. caninum serum and also with rabbit anti-T. gondii serum, respectively. Whereas the band at 144 kDa, and NCDG-1 were detected on bovine, chicken, and rabbit anti-N. caninum immunoblot profiles, they were not observed on rabbit anti-T. gondii immunoblot profile. These specific antigenic proteins were recorded as species-specific proteins of N. caninum against T. gondii. Based on the proteome analysis, C-ELISA was developed to screen the cattle infected with N. caninum by using N. caninum tachyzoite lysate as a coating antigen and chicken anti-N. caninum immunoglobulin (Ig)Y as a competitor. C-ELISA was able to detect the antibody of N. caninum without cross-reactivity with T. gondii. Furthermore, it achieved a fine diagnostic performance in the cases of 162 bovine sera.
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Shin, Ys., Lee, Eg., Shin, Gw. et al. Development of competitive ELISA for neosporosis by employing immunoproteomics. Clin Proteom 1, 235–248 (2004). https://doi.org/10.1385/CP:1:3-4:235
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DOI: https://doi.org/10.1385/CP:1:3-4:235