Surface expression of adhesion molecules on resting HUVEC (“Control”) and on HUVEC exposed to 10<sup>-6</sup> mol/l histamine (“Hist”), the supernatant of 8 μg/ml oxLDL-treated macrophages (“S<sub>M</sub>”), or a combination of the oxLDL-treated macrophage supernatant and histamine (“S<sub>M</sub>+Hist”).
<p>(A) Histogram of the expression and (B) fluorescence intensity relative to the isotype control (mean ± SD, n = 3) of ICAM-1, VCAM-1 and E-selectin. (C) Percentage of HUVEC with positive expression of these adhesion molecules (mean ± SD, n = 3). Details about the HUVEC activation groups are given in Figs. <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0123088#pone.0123088.g001" target="_blank">1</a> and <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0123088#pone.0123088.g004" target="_blank">4</a>.</p
