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Effects of different concentrations of LPS on the expression of adhesion molecules determined by flow cytometry. (a) ICAM-1, (b) E-selectin, (c) CD11b, (d) L-selectin. Induction of E-selectin and ICAM-1 expression on HUVEC required maximal activation with LPS, whereas the sub-maximal activation induced a shedding of L-Selectin and increase of CD 11b-expression on PMN (* P < 0.01 vs. 0 ng/ml; ANOVA of logarithms).
