Fig. 4.
Dose-dependent effects of TNF on EC monolayer permeability.
Permeability across functional EC monolayers was determined by measuring absorbance at 620 nm after a 90-minute exposure to TNF at various concentrations. TNF doses of 1.0 and 0.1 μg/mL resulted in a significantly greater effect on permeability after 60 minutes than lower doses.