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Radioimmunoassay for human corticosteroid-binding globulin.
Clinical Chemistry
|July 1, 1983
Summary
Researchers developed a highly sensitive radioimmunoassay (RIA) to measure corticosteroid-binding globulin (CBG) in human serum. This new RIA method accurately quantifies CBG levels, offering a valuable tool for clinical diagnostics and research.
Area of Science:
- Biochemistry
- Immunology
- Clinical Chemistry
Background:
- Corticosteroid-binding globulin (CBG) plays a crucial role in regulating corticosteroid bioavailability.
- Accurate quantification of CBG is essential for understanding various physiological and pathological conditions.
Purpose of the Study:
- To develop and validate a sensitive radioimmunoassay (RIA) for quantifying human corticosteroid-binding globulin (CBG).
- To establish the normal concentration range of CBG in healthy individuals.
Main Methods:
- Isolation of corticosteroid-binding globulin from human plasma.
- Production of polyclonal antibodies in rabbits using purified CBG as antigen.
- Development of a radioimmunoassay (RIA) using the generated antiserum.
Main Results:
- The developed RIA can detect CBG in as little as 0.007 microL of serum.
- Routine measurements are performed using 0.02 microL of diluted serum.
- The mean serum CBG concentration in 40 normal subjects was 32.4 (SD 4.2) mg/L.
- High correlation (r=0.94) was observed between the RIA and an established binding assay.
Conclusions:
- A sensitive and reliable RIA for human CBG has been successfully developed.
- This RIA method provides accurate quantification of CBG, comparable to existing methods.
- The assay is suitable for routine clinical and research applications requiring precise CBG measurements.