title: Production and characterization of antibodies against microcystins.
abstract: Antibodies against a microcystin (MCYST) leucine-arginine variant (MCYST-LR) were demonstrated 4 weeks after immunization of rabbits with either MCYST-LR-polylysine- or MCYST-LR-ethylenediamine-modified bovine serum albumin. A radioimmunoassay (RIA), a direct competitive enzyme-linked immunosorbent assay (ELISA), and an indirect competitive ELISA were developed for characterization of the antibodies. Indirect ELISA and RIA revealed that MCYST-LR-ethylenediamine-bovine serum albumin was a better immunogen. Competitive RIA and direct ELISA revealed that the antibodies had good cross-reactivities with an MCYST-arginine-arginine variant (MCYST-RR), MCYST-LR, an MCYST-tyrosine-arginine variant (MCYST-YR), and nodularin (NODLN); but they had lower reactivities with variants MCYST-leucine-tyrosine (MCYST-LY) and MCYST-leucine-alanine (MCYST-LA). The antibodies did not cross-react with ozonolyzed MCYST-LR. The concentrations causing 50% inhibition of binding of reduced MCYST-LR to the antibodies by MCYST-RR, MCYST-LR, MCYST-YR, NODLN, MCYST-LA, and MCYST-LY in the RIA were 43, 105, 112, 503, 671, and 1,920 ng/ml, respectively. The concentrations causing 50% inhibition of binding of MCYST-LR-horseradish peroxidase to the antibodies by MCYST-RR, MCYST-LR, MCYST-YR, NODLN, MCYST-LY, and MCYST-LA in the ELISA were 1.75, 2.2, 3.4, 4.6, 50, and 114 ng/ml, respectively.
authors.affiliation: Food Research Institute, University of Wisconsin-Madison 53706.
authors.forename: F S
authors.initials: FS
authors.lastname: Chu
authors.forename: X
authors.initials: X
authors.lastname: Huang
authors.forename: R D
authors.initials: RD
authors.lastname: Wei
authors.forename: W W
authors.initials: WW
authors.lastname: Carmichael
mesh_terms: D000818:Animals; D000906:Antibodies / Q000032:analysis*; D000917:Antibody Formation; D000918:Antibody Specificity; D001667:Binding, Competitive; D003429:Cross Reactions; D000458:Cyanobacteria / Q000276:immunology*; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D008387:Marine Toxins / Q000276:immunology*; D015394:Molecular Structure; D010456:Peptides, Cyclic / Q000276:immunology*; D011817:Rabbits; D011863:Radioimmunoassay
chemical_list: D000906:Antibodies; D008387:Marine Toxins; D010456:Peptides, Cyclic