Figure 1.

Immunolocalization of the aryl hydrocarbon receptor (AhR) in human placentas from women with normal (N) and severe preeclamptic (sPE) pregnancies and umbilical cord arteries and veins. The adjacent tissue sections were incubated with either a rabbit AhR antibody or preimmune rabbit IgG (insets). Reddish color indicates positive staining for the AhR. Representative images for N placentas (A), sPE placentas (B), umbilical cord arteries (C), and veins (D) are shown. Arrowheads, syncytiotrophoblasts; arrows, endothelial cells; asterisks, lumen of blood vessels. Bar = 100 μm.