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Sensitive ELISA for determination of serum E2 using a new tracer E2-Biotin
Jinfu Zhao1, Yongcheng Wang, Jianqiu Mi
1The Key Laboratory of Bioorganic Chemistry and Molecular Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, PR China.
Journal of Immunoassay & Immunochemistry
|December 18, 2003
Summary
A novel estradiol (E2) tracer and monoclonal antibody were developed for a competitive ELISA. This assay accurately measures serum E2 levels, offering improved diagnostic potential.
Area of Science:
- Biochemistry
- Immunology
- Analytical Chemistry
Background:
- Estradiol (E2) is a crucial hormone in reproductive health.
- Accurate measurement of serum E2 is vital for clinical diagnostics.
- Existing assays may have limitations in sensitivity or specificity.
Purpose of the Study:
- To synthesize a novel E2-Biotin tracer with varied spacers.
- To characterize monoclonal antibodies against E2 for immunoassay development.
- To establish a competitive Enzyme-Linked Immunosorbent Assay (ELISA) for serum E2 quantification.
Main Methods:
- Synthesis of E2-Biotin tracer at position 3 of estradiol.
- Immunoreactivity testing using anti-E2 monoclonal antibodies.
- Development and validation of a competitive ELISA for serum E2 detection.
Main Results:
- The developed tracer demonstrated immunoreactivity with anti-E2 antibodies.
- The competitive ELISA exhibited a wide dynamic range (33-20,000 pg/mL).
- The assay achieved a detection limit of 28.3 pg/mL with good intra- and inter-assay precision.
Conclusions:
- A novel E2 tracer and high-affinity antibody enable a sensitive competitive ELISA.
- The developed assay is suitable for accurate serum E2 measurement.
- Dried microtiter plates offer a stable format for up to 3 months.