Exogenous LL-37 promotes an early neutrophil response to P. aeruginosa in cathelicidin-deficient mice.

Camp−/− mice were inoculated with 3×10⁷ cfu of P. aeruginosa PAO1 and 10 µg LL-37 peptide or PBS by intranasal delivery. At 6 hours (a) or 24 hours (b) after inoculation mice were culled and their lungs were lavaged. BALF was cytocentrifuged and differential counts were conducted for neutrophils. Data show Tukey box and whiskers plots for n≥8 animals per condition. Analyses were conducted using the Mann Whitney test; * p<0.05.