Abstract
Lymphocytes isolated from peripheral blood of healthy donors were stimulated in vitro with pokeweed mitogen, concanavalin A, flagellin, Nocardia delipidated cell mitogen (NDCM) and heat-killed bacteria Escherichia coli and Actinomyces viscosus. A simple and sensitive technique, enzyme-linked immunosorbent assay (ELISA) was used for the detection of nanogram levels of IgM, IgA and IgC in media from lymphocyte cultures after polyclonal stimulation, Pokeweed mitogen, NDCM and E. coli were shown to stimulate a high production of IgM; after stimulation with A. viscosus a higher production of IgA was detected. No immunoglobulin production was observed after stimulation with polymerized flagellin.
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