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  • Title: [ICO-166 monoclonal antibodies against the CD45RA antigen].
    Author: Frolova EA, Baryshnikov AIu, Novikov VV, Syrkin AB.
    Journal: Biull Eksp Biol Med; 1993 Jul; 116(7):63-6. PubMed ID: 8400188.
    Abstract:
    Monoclonal antibodies (MCA) ICO-166 against CD45RA antigen were generated and characterized. In the indirect IFA, MCA ICO-166 reacted with 54.1 +/- 1.9% lymphocytes of human peripheral blood and 15.2 +/- 2.3% monocytes but not with granulocytes or thrombocytes. The method of double labelling of cells demonstrated that MCA ICO-166 detected all B-lymphocytes, all NK-cells and 31% of mature T-lymphocytes but only 55% of CD8 suppressor cells and only 21% of CDA helper cells carried this antigen on the surface. Experiments were carried out to block binding of FITC-labeled MCA ALB11 against CD45RA antigen with human lymphocytes by pretreatment of cells with different concentrations of MCA ICO-166. Treatment of cells with MCA ALB11 blocked binding of MCA ALB11-FITC by 85% on the average. MCA ICO-166 blocked binding of MCA ALB11-FITC by 66% on the average. When different dilutions of MCA ICO-166 were used, the dose-dependent effect of blocking of MCA ALB11-FITC binding was observed. MCA ICO-166 immunoprecipitated a protein band of molecular weight 220 kDa from lysates of mononuclear cells of the human peripheral blood.
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