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Accessory cell paradox: monocytes enhance or inhibit lectin-mediated human T-lymphocyte proliferation depending on
1Blood Transfusion Centre, Royal Infirmary, Edinburgh, UK.
Monocytes suppressed the mitogenic response of human T lymphocytes to the lectin from Datura stramonium but enhanced the mitogenic response of the same lymphocytes to wheat germ agglutinin under identical culture conditions. The inhibitory action was probably cell-mediated, but was not the result of cytotoxicity. The stimulative activity could be replaced by cell-free conditioned medium.
Monocytes suppressed the mitogenic response of human T lymphocytes to the lectin from Datura stramonium but enhanced the mitogenic response of the same lymphocytes to wheat germ agglutinin under identical culture conditions. The inhibitory action was probably cell-mediated, but was not the result of cytotoxicity. The stimulative activity could be replaced by cell-free conditioned medium.