›› 2017, Vol. 44 ›› Issue (10): 3100-3105.doi: 10.16431/j.cnki.1671-7236.2017.10.038

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Preparation of Monoclonal Antibody and Establishment of Indirect Competitive ELISA of Estradiol

BAI Yu1,2, HU Jing-yan2, XU Yong-peng2, HE Jie2, JIN Jun-jie1,2, LI Pei-de1,2, LIU Su-zhen1,2   

  1. 1. Institute of Animal Science, Wenzhou Academy of Agricultural Sciences, Wenzhou 325006, China;
    2. College of Animal Science, Wenzhou Vocational College of Science and Technology, Wenzhou 325006, China
  • Received:2017-04-12 Online:2017-10-20 Published:2017-10-20

Abstract:

In order to establish a sensitive,specific and rapid method for the detection of estradiol (E2) residues, an indirect competitive enzyme-linked immunosorbent assay (icELISA) based on monoclonal antibody (MAb) for E2 was developed. BALB/c mice were immunized by E2-BSA and cell fusion technology was employed to screen hybridoma cell lines. One hybridoma cell line (3H3) was isolated, which produced monoclonal antibody that could binding E2. Under the optimized conditions, the icELISA based on 3H3 for E2 showed a half maximum inhibition concentration (IC50) values of 1.636 ng/mL and detection ranges of 0.202 to 13.281 ng/mL with cross-reactivities for estriol and ethinyloestradiol of 0.31% and 0.25%, respectively, and negligible cross-reactivities with other E2 analogs including estrone, estradiol valerate, estradiol benzoate, quinestrol, diethylstilbestrol and nonylphenol. The results demonstrated that the developed method could meet the requirements of high sensitivity detection of E2 residue in food samples.

Key words: estradiol; monoclonal antibody; indirect competitive ELISA

CLC Number: