title: Improved fusion technique. I. Human umbilical cord serum, a new and potent growth promoter, compared with other B cell and hybridoma activators.
abstract: Accelerated proliferation of hybridoma cells was observed in the presence of human umbilical cord serum (HUCS). This had very strong growth-promoting activity, even at a concentration of 2%. A comparison was made between HUCS and other B cell growth promoters, such as lipopolysaccharide (LPS) and dextran sulfate (DxS), macrophage supernatant, and human endothelial culture supernatant (HECS). The growth-promoting effect of HUCS was superior. Using a microcytotoxicity assay, we found no significant differences in the number of antibody producing clones with the various culture media, except for fetal calf serum.
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology*; D002459:Cell Fusion; D002460:Cell Line; D003470:Culture Media; D046508:Culture Techniques / Q000379:methods; D003602:Cytotoxicity, Immunologic; D004261:DNA Replication; D005260:Female; D005312:Fetal Blood / Q000502:physiology*; D006133:Growth Substances / Q000494:pharmacology*; D006801:Humans; D006825:Hybridomas / Q000276:immunology*; D008214:Lymphocytes / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D010954:Plasmacytoma / Q000276:immunology; D011247:Pregnancy; D014470:Umbilical Cord
chemical_list: D003470:Culture Media; D006133:Growth Substances