- Original Article
- Open Access
Development of competitive ELISA for neosporosis by employing immunoproteomics
Clinical Proteomics volume 1, Article number: 235 (2004)
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, Y., Lee, E., Shin, G. et al. Development of competitive ELISA for neosporosis by employing immunoproteomics. Clin Proteom 1, 235 (2004). https://doi.org/10.1385/CP:1:3-4:235
- Neospora caninum
- Toxoplasma gondii
- competitive ELISA