title: A direct competitive enzyme-linked immunosorbent assay (ELISA) for determination of praziquantel concentration in serum.
abstract: A simple and reproducible enzyme-linked immunosorbent assay (ELISA) for the determination of the concentration of praziquantel in the serum was developed. Since praziquantel has no functional group to conjugate with carrier protein, praziquantel was first converted to a compound with an amino group similar to praziquantel. This compound was then conjugated to bovine serum albumin for use as an immunogen, and to horseradish peroxidase, as enzyme-labeled praziquantel, respectively. The conjugate of praziquantel-bovine serum albumin conjugate was used to raise anti-praziquantel antiserum in mice. The direct competitive ELISA was conducted by simultaneously incubating praziquantel and horseradish peroxidase-labeled praziquantel conjugate with anti-praziquantel antiserum over a second antibody and the enzyme activity of the remaining horseradish peroxidase-labeled praziquantel conjugate was measured. The intra- and inter-assay coefficient of variation was < 10% in the range of 1.0 to 30 ng ml(-1), and the limit of the detection was 0.3 ng ml(-1). The cross reactivities of anti-praziquantel antibody with compounds related to praziquantel were negligible. Using this ELISA, serum levels of praziquantel were easily determined in male Wistar rats up to 8 h following a single intraperitoneal injection at 2 mg kg(-1) of body weight.
authors.affiliation: Laboratory of Toxicological Science, Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto, 3-1-100 Tsukide, 862-8502, Kumamoto, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Mitsui
authors.forename: K
authors.initials: K
authors.lastname: Arizono
mesh_terms: D000818:Animals; D000871:Anthelmintics / Q000097:blood* / Q000493:pharmacokinetics; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods*; D006735:Horseradish Peroxidase / Q000378:metabolism; D006868:Hydrolysis; D007106:Immune Sera; D007202:Indicators and Reagents; D008297:Male; D051379:Mice; D008956:Models, Chemical; D011223:Praziquantel / Q000097:blood* / Q000493:pharmacokinetics; D051381:Rats; D017208:Rats, Wistar
chemical_list: D000871:Anthelmintics; D007106:Immune Sera; D007202:Indicators and Reagents; D011223:Praziquantel; D006735:Horseradish Peroxidase