Figure 8.

Endoneurial blood vessels in dhh−/− nerves are permeable to dyes. Comparison of permeability to EBA in dhh+/− and dhh−/− mouse tissues is shown. Left column, Sciatic nerve. Note the labeling throughout the nerve in the dhh−/− nerve (bottom), whereas in the dhh+/− nerve, EBA is confined to the epineurium and three capillaries within the endoneurium. Middle and right columns, Labeling is confined to capillaries in both the cortex and cerebellum and does not differ between dhh+/− and dhh−/− mice. Scale bars, 50 μm.