Effects of 14-member and 15-member macrolides on the phagocytosis of apoptotic neutrophils by human AM in the presence of medium alone. AM was treated with ERY, RXM, OLM, AZM, JOS, SPM, or CLDM at concentrations of 10 μg/ml for 72 h. Treatment of AM with DEX (10−7 M) was done for 24 h. The control (CTRL) represents the treatment of AM with medium containing 0.1% DMSO. Each value represents the mean ± SD of three determinations. *, P < 0.01 (versus CTRL).