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Development of solid phase radioimmunoassay system using new polymeric magnetic micro-spheres

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Abstract

Magnetic particles were locally prepared by co-precipitation of Fe2+ and Fe3+ in an ammonia solution. The prepared microsphere were grafted with polyacrylamide acrylic acid by using gamma irradiation polymerization in presence of MBA as a cross linker. AFP antibody was immobilized on these beads and used as a solid phase in radioimmunoassay technique. The immunoreactivity of the developed assay was found to be influenced by different factors such as solid phase volume, incubation time, incubation temperature and storage period. A comparative study was performed between the developed assay system and others two ones. The maximum binding percent attained the value of 19.5% while the sensitivity was observed to be 1.3 IU/mL. The developed assay displayed acceptable precision estimated by repeated analysis of the quality control samples and the clinical samples analyzed by this assay showed a good correlation with that commercial kit (r = 0.998).

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Authors and Affiliations

  1. Department of Nuclear Chemistry, Hot Labs Centre, Cairo, Egypt

    R. R. Sheha & A. A. El-Zahhar

  2. Department of Labeled Compounds, Hot Labs Centre, Cairo, 13759, Egypt

    Kh. M. Sallam

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  1. Kh. M. Sallam
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  2. R. R. Sheha
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  3. A. A. El-Zahhar
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Correspondence to Kh. M. Sallam.

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Sallam, K.M., Sheha, R.R. & El-Zahhar, A.A. Development of solid phase radioimmunoassay system using new polymeric magnetic micro-spheres. J Radioanal Nucl Chem 290, 339–345 (2011). https://doi.org/10.1007/s10967-011-1188-6

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  • DOI: https://doi.org/10.1007/s10967-011-1188-6

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