Abstract
The main objective of this study was the preparation and evaluation of the primary reagents for the liquid phase human chorionic gonadotropin-radioimmunoassay (HCG-RIA) kit. Polyclonal antibody is specific and valid; monoclonal antibodies are more specific. In HCG-RIA technique, polyclonal antibodies for βHCG subunits with high binding and displacement % were used. 125I-HCG radioactive tracer was prepared with high yield 71.58 ± 0.92%, purity 99.2 ± 0.05%, and specific activity 170.42 ± 1.65 µCi/µg using chloramine T method, βHCG polyclonal antisera and HCG standards in assay buffer matrix were locally prepared. In-house HCG-RIA was developed with high sensitivity 0.5 mIU/ml, specificity (99%), precision (CV% < 6.4 and < 8.3 for intra-and inter-assay, respectively), and accuracy (recovery range 96.4–104.3%) could be used for quantitative estimation of HCG in human sera for monitoring pregnancy and diagnosis of gestational trophoblastic diseases.
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