title: Quantification of circulating schistosome antigen by monoclonal antibody-based enzyme-linked immunosorbent assay.
abstract: A two-site enzyme-linked immunosorbent assay (2S-ELISA) was developed for the quantification of gut-associated schistosome circulating anodic proteoglycan (GASCAP) of Schistosoma japonicum using a monoclonal antibody (McAb M120), purified by one-step hydroxylapatite (HAP) chromatography, as both solid phase and peroxidase-conjugated reagent. In this system, a high detectable level of serum GASCAP concentration (0.25 microgram/L) could be achieved with the immunoaffinity purified GASCAP being used as the standard. The specificity of the assay was 97.2%, with minimized interference of rheumatoid factor. The intra-assay (4.01%) and interassay (6.09%) coefficients of variation and the mean analytical recovery (101.4%) for GASCAP demonstrated the precision and accuracy of the assay.
authors.affiliation: Department of Parasitology, Shanghai Second Medical University.
authors.forename: Z D
authors.initials: ZD
authors.lastname: Li
authors.forename: Z L
authors.initials: ZL
authors.lastname: Qian
authors.forename: X S
authors.initials: XS
authors.lastname: Su
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal; D000947:Antigens, Helminth / Q000032:analysis*; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods; D006801:Humans; D011509:Proteoglycans / Q000276:immunology*; D012549:Schistosoma japonicum / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D000947:Antigens, Helminth; D011509:Proteoglycans