@article {Shin:September 2004:1542-6416:235, author = "Shin, Yong-seung", author = "Lee, Eung-goo", author = "Shin, Gee-wook", author = "Kim, Young-rim", author = "Lee, Eun-young", author = "Kim, Jae-hoon", author = "Jang, Hwan", author = "Kim, Dae-yong", author = "Kim, Yong-hwan", author = "Kim, Gon-sup", author = "Suh, Myung-deuk", author = "Jung, Tae-sung", title = "Development of competitive ELISA for neosporosis by employing immunoproteomics", journal = "Clinical Proteomics", volume = "1", year = "September 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.", pages = "235-248(14)", url = "http://www.ingentaconnect.com/content/hum/cp/2004/00000001/F0020003/art00002" doi = "doi:10.1385/CP:1:3-4:235" }