The endocytic ability of the different macrophage populations.

Endocytosis by M1 and M2 macrophages, or macrophages stimulated with conditioned media (Cm) from RKO, SW480 or Caco2 CRC cell lines was evaluated by measuring internalization of FITC-dextran by flow cytometry. Shown is percent relative endocytosis (mean ± SD) with endocytosis by IL10 stimulated M2 macrophages set as 100%. Statistically significant differences are indicated by * (p<0.05) or ** (p<0.01). All other differences were tested but found non-significant (not indicated in figure).