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Article type: Research Article
Authors: Sidorova, Ekaterinaa; * | Borisova, Tatianaa | Lyakisheva, Lilyaa | Rosen, Andersb
Affiliations: [a] Laboratory of Immunoglobulin Biosynthesis, Institute for Viral Preparations, Russian Academy of Medical Sciences, Moscow, Russia | [b] Department of Cell Biology, Linköping University, Linköping, Sweden
Correspondence: [*] Correspondence and reprint requests to: Ekaterina Sidorova, Institute for Viral Preparations of Russian Academy of Medical Sciences, 1st Dubrovskaya str. 15, 109088 Moscow, Russia.
Abstract: A new approach to the developing of human monoclonal antibodies to viral peptides is described. The method is based on the positive selection of B cells specific to viral peptides from normal human tissues. To isolate B cells bearing immunoglobulin receptors specific to viral epitopes magnetic beads coated by viral peptides were used. Human B lymphocytes specific to the neutralizing epitope of gp120 of human immunodeficiency virus and to the major epitope of Epstein-Barr nuclear antigen-1 were isolated from freshly removed human tonsils. Preselected cells were transformed by Epstein-Barr virus and cultivated on irradiated human embryonic lung fibroblasts in RPMI 1640-OptiMEM medium with 10% fetal calf serum and all necessary supplements. The cultures of B cells producing antibodies to viral epitopes used for selection were obtained. Two cultures secreting IgM antibodies to the peptide MN-24 (neutralizing epitope of immunodeficiency virus) and to the peptide p107 of Epstein-Barr nuclear antigen-1 were expanded, and the specificity of the antibodies and antibody-producing cells was analyzed. The method of positive selection of B cells specific to viral peptides may be used for the preparation of human monoclonal antibodies to viral antigens.
Keywords: Human monoclonal antibody, viral peptides, B cells
DOI: 10.3233/HAB-1997-8203
Journal: Human Antibodies, vol. 8, no. 2, pp. 65-69, 1997
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