A solid-phase luminescent immunoassay for human chorionic gonadotropin using Pholas dactylus bioluminescence.
A solid-phase luminescent immunoassay (LIA), based on the light emission produced as a result of the oxidation of Pholas dactylus luciferin by horseradish peroxidase (HRP) in the presence of molecular oxygen, was developed for human chorionic gonadotropin (hCG). The light emitted in the presence of diethyldithiocarbamate permitted the detection of 0.1 fmol HRP. HRP retained most of its light-emitting capacity after coupling with purified anti-hCG antibody by glutaraldehyde. The LIA involved immobilization of the antigen in plastic tubes coated with purified anti-hCG antibody and detection of the immunocomplex by light emission in the presence of Pholas luciferin. Light emission was linear for antigen concentration within the range 0.5-100 ng/ml. LIA correlates reasonably well with RIA and has a comparable sensitivity (0.5 ng hCG/ml).
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Henry
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D049872:Bivalvia; D001769:Blood; D006063:Chorionic Gonadotropin / Q000032:analysis*; D049454:Firefly Luciferin; D006735:Horseradish Peroxidase / Q000378:metabolism; D006801:Humans; D007118:Immunoassay / Q000379:methods*; D007527:Isoenzymes / Q000378:metabolism; D008163:Luminescent Measurements
D006063:Chorionic Gonadotropin; D007527:Isoenzymes; D049454:Firefly Luciferin; D006735:Horseradish Peroxidase