Fig. 6From: Expression profiling and functional analysis of Toll-like receptors in primary healthy human nasal epithelial cells shows no correlation and a refractory LPS responseExpression of TLR4 and CD14. Surface expression of TLR4 and CD14 on primary nasal epithelial cells was assessed using flow cytometry. Histograms with solid lines represent controls, spotted lines display surface expression of TLR4 (upper graph) or CD14 (lower graph) under unstimulated conditions. Histograms with dashed lines illustrate TLR4 (upper graph) or CD14 (lower graph) expression upon stimulation with LPS (1 μg/mL, 24 h)Back to article page