Secreted Factors from Colorectal and Prostate Cancer Cells Skew the Immune Response in Opposite Directions

Macrophage infiltration has been associated with an improved prognosis in patients with colorectal cancer (CRC), but a poor prognosis in prostate cancer (PC) patients. In this study, the distribution and prognostic value of proinflammatory M1 macrophages (NOS2(+)) and immunosuppressive M2 macrophages (CD163(+)) was evaluated in a cohort of 234 PC patients. We found that macrophages infiltrating PC were mainly of an M2 type and correlated with a...