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Sandwich-type enzyme immunoassay for human chorionic gonadotropin
Journal of Endocrinological Investigation
|July 1, 1981
Summary
A new enzyme immunoassay for human chorionic gonadotropin (hCG) offers high sensitivity and precision. This method accurately measures hCG levels in serum and urine, comparable to established techniques like radioimmunoassay.
Area of Science:
- Biochemistry
- Immunology
- Assay Development
Background:
- Human chorionic gonadotropin (hCG) is a crucial biomarker.
- Existing assays for hCG measurement have limitations.
- Development of sensitive and precise hCG detection methods is essential.
Purpose of the Study:
- To develop a novel sandwich-type enzyme immunoassay for quantifying human chorionic gonadotropin (hCG).
- To evaluate the sensitivity, precision, and correlation of the developed enzyme immunoassay with existing methods.
Main Methods:
- Utilized a sandwich-type enzyme immunoassay format.
- Employed an antibody Fab'-beta-D-galactosidase complex.
- Used an antibody-immobilized silicone rubber solid phase for sample capture.
Main Results:
- Achieved high sensitivity, detecting hCG at levels as low as 0.3 mIU per assay tube.
- Demonstrated high precision with coefficients of variation within-run (9.2-13.3%) and between-run (4.2-18.8%).
- Showed excellent correlation with radioimmunoassay (r=0.961) and hemagglutination assay (r=0.954).
Conclusions:
- The developed enzyme immunoassay is a sensitive and precise method for hCG quantification in biological samples.
- This assay provides reliable results comparable to radioimmunoassay and hemagglutination assay.
- The method is suitable for determining hCG levels in both serum and urine without sample interference.