Figure 6.
EphrinB2 is expressed predominantly in the endothelial cells of collecting lymphatic vessels, while EphB4 is in both lymphatic capillaries and collecting lymphatic vessels. Triple immunofluorescence for LYVE-1, podoplanin, and αSMA (A-D); for ephrinB2 (βgal), podoplanin, and αSMA (E-H); and for EphB4, podoplanin, and LYVE-1 (I-L) of the ear skin at P21. (A-D) High LYVE-1 expression is detected in the lymphatic capillaries (arrow) but not in the αSMA-positive collecting lymphatic vessels (arrowhead). Podoplanin instead stains all lymphatic vessels. αSMA also stains blood vessels (bv). (E-H) EphrinB2 is expressed on the endothelium of collecting lymphatic vessels (αSMA-positive, arrowhead), but not on podoplanin-positive, αSMA-negative lymphatic capillaries (arrow). (I-L) EphB4 is expressed both on the LYVE-1-positive lymphatic capillaries (arrow) and on the LYVE-1-negative collecting lymphatic vessels (arrowhead). In addition, the veins are positive for EphB4. Bars, 100 μm.