Fig. 6

MPO immunofluorescence staining and MPO activity in rabbit carotid aneurysm tissues. (A) Immunofluorescence staining showed a lower level of positive expression of MPO in ABAH(+) group than that in ABAH(-) group both at week 1. Scale bar (white) = 200 μm. Scale bar (red) = 50 μm.). Arterial lumen (red arrow), arterial wall (white arrow); (B) Quantitative analysis of MPO activity revealed a significant lower level MPO activity of ABAH(+) group than that of the ABAH(-) group at week 1. A Student’s t-test was used for statistical analysis. The results are presented as the mean ± SD (n = 3. ** P < 0.01); (C) Relationship between the ΔCNR determined from the images of MRI and the MPO activity ex vivo at week 4. The linear regression lines are in black