Fig. 4From: Expression profiling and functional analysis of Toll-like receptors in primary healthy human nasal epithelial cells shows no correlation and a refractory LPS responseNCI-H292 cells were stimulated for 24 h with LPS (1 μg/ml) and TNF-α (25 ng/ml) and IL-1β (10 ng/ml). Cell free supernatants were analyzed for the release of IL-6 and IL-8 by ELISABack to article page