A delay of apoptosis in blood PMNs ofCD18^−/− mice.

Flow cytometric analysis of DNA content measured in propidium iodide–stained PMNs isolated from the circulation ofCD18^+/+ (n = 7) orCD18^−/− mice (n = 5). (A) Representative recording of the fluorescence histograms obtained from isolated blood PMNs aged for 4 hours in culture without further stimulation. Numbers indicate apoptotic PMNs in percent of total cell number. (B) Mean values obtained after 0 hours and 4 hours of culture. Data represent means ± SDs; **P < .005.