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Dexamethasone pretreatment (100 nmol/L) for 1 hour before MMP-9 restores HUVEC monolayer transendothelial electrical resistance (n = 8-20 replicates per group). *P < .01 relative to vehicle by 1-way ANOVA, post hoc multiple comparisons test with Bonferroni correction. ANOVA indicates analysis of variance; HUVEC, human umbilical vein endothelial cell; MMP-9, matrix metalloproteinase 9.
