Representative photomicrographs of aorta in experimental groups: Normal morphology of aorta in control group (A); degenerated endothelium (arrow) and inflammatory cells (arrowhead) in adventitia layer of CRF group (B); quite regular endothelium (arrow) and a decreased number of inflammatory cells (arrowhead) in adventitia layer of CRF+CAP (C), CRF+VAL (D), CRF+NAC (E), CRF+CAP+NAC (F) and CRF+VAL+NAC (G) groups are seen. H andE staining, original magnifications: 200x