Figure 1

Cell cycle staining. (a) Annexin V−/PI− cells were considered non-apoptotic. (b) Annexin V+/PI− cells were considered in an early stage of apoptosis. (c) Annexin V+/PI+ were in a late stage of apoptosis/necrosis. Data are mean percentages±standard deviation. *Comparison oPMNs and cPMNs, P<0.001. cPMN, circulatory polymorphonuclear neutrophils; oPMN, oral polymorphonuclear neutrophils; PI, propidium iodide.