Figure 5.
Leukocyte stimulation leads to extracellular DNA deposition and elevation of in-circuit pressure. (A) Citrated whole blood on day 0 was stimulated with 0.6 µg/ml phorbol 12-miristate 13-acetate (PMA) at 37 °C for 120 minutes before administration to the circuit. Unfractionated heparin (Hep) was administered at 15 minutes and in-circuit pressure was monitored for up to 60 minutes. N = 4 per group. (B) The paired t-test was used to analyze the difference in the area under the curve (AUC) between the PMA-stimulated group and the non-stimulated group. *p < 0.05. (D) The filter was removed at 60 minutes and analyzed by immunofluorescence. Fibrin(ogen) was labeled in red and DNA was labeled in blue. Representative images of the whole filter (scale bars: 10 mm) and the magnified view (scale bars: 50 μm) are shown.
