Fig. 5. Cytokine levels in lung homogenates. Levels of interleukin (IL) 6, keratinocyte-derived chemokine (KC), IL-10, IL-1α, IL-1β, and tumor necrosis factor (TNF) α in ventilated (V) wild-type (WT) and Toll-like receptor (TLR) 2 knockout (KO) mice. Mechanical ventilation in TLR2 KO mice did not result in statistically different cytokine levels in lung tissue homogenates compared with age-matched WT ventilated animals.