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Neutrophil-like HL-60 cell chemotaxis toward WT and miRNA KD cells. Supernatants collected from WT and miRNA KD cells stimulated with heat-killed WT P. gingivalis were used. IL-8 (100 ng/ml) was used as a positive control, and pure cell culture medium was used as a negative control. Bars represent mean values and standard deviations based on triplicate experiments (**, P < 0.01).
