Pokeweed mitogen-stimulated human lymphocytes fused to LICR-2 (HMY2) generate human-human hybridomas producing monoclonal IgG antibodies reactive to human breast carcinoma and malignant melanoma.
Human-human hybridomas were generated using pokeweed mitogen-stimulated lymphocytes from the regional lymph nodes of cancer patients by fusion to the LICR-2 human myeloma cell line. A total of 35 fusions, using the regional lymph node lymphocytes of cancer patients, resulted in hybrid growth in 23% of wells plated with 21 IgG ELISA positive clones, 6 of which have maintained stable human monoclonal antibody production. Mononuclear cells were separated on Ficoll-Paque and grown for 3-4 days in 1% pokeweed mitogen and fused to the LICR-2 human myeloma cell line. Human-human hybridoma producing membrane reactive IgG antibodies have been isolated and react to the following cancers: breast; melanoma. Twenty-seven fusions from 8 breast carcinoma patients resulted in 13 ELISA positive IgGs, 3 of which were stable after cloning. A total of 5,071 wells were plated after polyethylene glycol fusion with resultant hybrid growth in 1210 wells (24% hybrid growth) after hypoxanthine-aminopterin-thymidine selection. In 8 fusions using regional lymph node lymphocytes of other types of cancer, including 6 fusions using lymphocytes from malignant melanoma patients, there were 1,580 wells plated with positive growth in 20% of the wells (311 wells). Of these, 8 clones were ELISA positive and 3 stable clones all producing IgG anti-melanoma antibody were isolated. The overall hybrid frequency was 43 x 10(-7) fused lymphocytes (39 x 10(-7) non-breast and 45 x 10(-7) breast). A total of 21 IgG-producing clones were identified to crude membranes of allogeneic tumor cell lines and stable antibody production was achieved for 6 (29% stable clones).(ABSTRACT TRUNCATED AT 250 WORDS)
Martin
R F
RF
Wright State University School of Medicine, Hamilton, Ohio.
Kisor
R
R
Schroer
D
D
Eichler
G
G
Filaccio
M L
ML
D000911:Antibodies, Monoclonal / Q000096:biosynthesis* / Q000276:immunology; D000912:Antibodies, Neoplasm / Q000096:biosynthesis* / Q000276:immunology; D001943:Breast Neoplasms / Q000276:immunology*; D002459:Cell Fusion; D006801:Humans; D006825:Hybridomas / Q000276:immunology*; D007074:Immunoglobulin G / Q000096:biosynthesis* / Q000276:immunology; D008198:Lymph Nodes / Q000276:immunology / Q000473:pathology; D008213:Lymphocyte Activation / Q000187:drug effects; D008545:Melanoma / Q000276:immunology*; D009369:Neoplasms / Q000276:immunology / Q000473:pathology; D011043:Pokeweed Mitogens / Q000494:pharmacology; D014407:Tumor Cells, Cultured / Q000276:immunology
D000911:Antibodies, Monoclonal; D000912:Antibodies, Neoplasm; D007074:Immunoglobulin G; D011043:Pokeweed Mitogens