Figure 3. Renal micro vasculature damage at 1 week after obstruction:

Toluidine blue staining on semi-thin sections from kidneys obstructed for 1 week displayed arterioles with flattened smooth muscle cells (yellow arrows) and extensive micro-vascular damage in comparison to sham kidneys. Peritubular capillaries displayed dilation accompanied with absence of pericyte lining and endothelial degeneration (black arrows). Interstitial matrix deposition and pericyte-like cells in the interstitial space were prominent (cyan arrows). Tubular epithelium is indicated by red arrow heads. Scale bars, 10 μm.