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Preparation and validation of monoclonal antibody-based indirect competitive ELISA for detecting testosterone levels

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This paper presents the generation of monoclonal antibodies (mAbs) against testosterone (TES) through cell fusion technology, and the development of a mAb-based indirect competitive enzyme-linked immunosorbent assay (icELISA) method to detect TES residue in bovine edible tissues. Under optimal conditions, this assay exhibited a working range of 0.04–19 ng/mL, with half-maximum inhibition (IC50) and limit of detection values of 0.27 and 0.02 ng/mL, respectively. After three sample pretreatment procedures were checked, a simple dilution method was adopted for further use. The stabilisation studies demonstrated that the icELISA kits can be stored for at least 180 to 240 days, at 4°C and −20°C, respectively. When applied to bovine samples, the data from icELISA and gas chromatography coupled to mass spectrometry showed excellent correlation (r2=0.9923 in muscle, 0.9884 in liver and 0.9957 in kidney). Therefore, this assay has the potential to be incorporated into a quantitative monitoring programme for the rapid screening of TES residue in foods.
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Keywords: bovine; indirect competitive ELISA; monoclonal antibody; testosterone

Document Type: Research Article

Affiliations: College of Animal Science, Henan Institute of Science and Technology, Xinxiang, P.R. China

Publication date: April 3, 2014

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