AGT and aneurysm: Mac-3 positive stained cells in five high-power fields were counted manually, showing significantly increased numbers of MAC-3-positive macrophages in the aneurysm in the two ANG II groups compared with the saline group (182.2±46.3, 472±118.7 vs. 61.3±9.3/mm2, n = 6, P<0.01).