PathScan MAPK multitarget sandwich ELISA. HOEC monolayers (mixed donors; N = 3) were treated with either TNF-α (10 ng/ml), IL-1β (10 ng/ml), hBD-2 (5 μg/ml), or hBD-3 (5 μg/ml) for 0, 30, or 60 min, respectively. The cell lysates were analyzed for the indicated target using the PathScan MAPK multitarget sandwich ELISA kit (Cell Signaling, Danvers, MA) according to the vendor's instructions.