Production of Human Monoclonal Antibodies by the EpsteinBarr Virus Method

Epstein–Barr virus (EBV) is a herpes virus which in vitro efficiently immortalizes nearly all human B lymphocytes. The lymphoblastoid diploid cell lines (LCL’s) thus generated preserve the characteristics of the cells initially infected by the virus: the cells produce and secrete immunoglobulins and also express these molecules on their surface. A selection of specific antibody-producing cells (i.e., antigen-committed cells) before EBV-infection or when LCL’s have already been established, enables isolation of monoclonal cell lines that secrete specific antibodies. If selection of antigen-committed cells is not feasible, secretion of specific antibodies by cloned LCL’s in limiting dilution cultures enables isolation of the desired cell lines. The method allows the production of human IgM, IgG, IgA, and IgE monoclonal antibodies from any individual. Monoclonal antibodies produced by the EBV method resemble the antibody repertoire of the donor of the lymphocytes. Human monoclonal antibodies are promising reagents for passive immunization.