Production of human monoclonal antibodies against Epstein-Barr virus-specific antigens by the virus-immortalized lymphoblastoid cell lines - PubMed (original) (raw)
Production of human monoclonal antibodies against Epstein-Barr virus-specific antigens by the virus-immortalized lymphoblastoid cell lines
S Koizumi et al. Virology. 1986.
Abstract
The possible production of human monoclonal antibodies against Epstein-Barr virus (EBV) was assessed through the EBV immortalization technique. When individual lymphocyte samples from 50 clinical patients and healthy donors were immortalized by EBV, 4 lymphoblastoid lines yielded antibodies to EBV antigens. These positive lines were cloned and each line yielded cultures that secreted monoclonal antibodies against either viral capsid antigen (VCA) or membrane antigen (MA) component. Above all, a clonal line TAKA-SP-8 produced 5 micrograms MA antibody/10(6) cells/ml for more than 12 months. The culture fluid specifically immunoprecipitated a single polypeptide with a size of 93K from both P3HR-1 and B95-8 cell extracts. FUKA-SP-3, on the other hand, secreted 5 micrograms VCA antibody/10(6) cells/ml for at least 8 months. This antibody recognized two polypeptides with sizes of 123K and 120K, from P3HR-1 and B95-8 cell extracts, respectively. When B95-8 and P3HR-1 EBV were treated with the human MA monoclonal, both nuclear antigen (EBNA) synthesis and early antigen (EA) induction were strongly inhibited. All EBV antibody-producing cultures were exclusively achieved from splenic lymphocytes of patients with autoimmune diseases, but not from other donors.
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