Figure 1. Immunohistochemical staining for macrophage markers in term placental tissue.
Immunohistochemical staining for M1 macrophage markers, CD11b (ITGAM) (A) and CD40 (B) and M2 macrophage markers CD163 (C) and FR-β (D), was carried out using formalin-fixed paraffin embedded sections. Staining with negative control antibody is shown in the Panel A insert. Results are presented from one placenta representing three different placentas. Arrows indicate stained HBCs, arrowheads denote the syncytiotrophoblast, and the asterisk denotes a fetal capillary. Bar; 20 μm.