MITOGENIC EFFECT BY LIPOPOLYSACCHARIDE AND POKEWEED LECTIN ON DENSITY-INHIBITED CHICK EMBRYO FIBROBLASTS |
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| Authors: | Antti Vaheri Erkki Ruoslahti Matti Sarvas Marjatta Nurminen |
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| Affiliation: | From the Department of Virology and the Department of Serology and Bacteriology, University of Helsinki, SF-00290 Helsinki 29 and the Department of Bacteriology, Central Public Health Laboratory, SF-00280 Helsinki 28, Finland |
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| Abstract: | The B lymphocyte mitogens, bacterial lipopolysaccharide (LPS), pokeweed lectin, and tuberculin, induced proliferation in density-inhibited monolayer cultures of chick embryo fibroblasts. The stimulation was seen both as an early increase in sugar uptake and cell volume and later as an increase in thymidine incorporation and cell number. The concentration of LPS maximally stimulating fibroblasts was remarkably low, about 0.1–1 ng/ml. LPS preparation with very different sugar chains gave quite similar results indicating that the architecture of the hydrophilic carbohydrate part is not critical for the mitogenic effect. |
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