Abstract
Peripheral blood lymphocytes from healthy people recently immunized against tetanus toxoid (TT) were fused with human malignant B-cell lines or mouse myeloma cells (X63 Ag8.653) in an attempt to establish stable B cell hybridomas secreting anti TT antibodies. Human-human fusion experiments were not successful. In contrast, the five heterospecific fusion experiments yielded between 60 and 100% of wells that contained growing hybrids. Five of these hybrids repeatedly secreted anti-TT antibodies. One of the hybrids was cloned and secreted 10-20 micrograms/ml of human IgM, lambda anti-TT antibody. Heterospecific hybridization thus appears as an interesting method to obtain human monoclonal antibodies, allowing the study of their properties.
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