A representative gelatin zymogram of MMP-2 and MMP-9 from pigs at 2 weeks (A) and 12 weeks (B) after embolization. Densitometric analysis of gelatin zymogram of pro-MMP-9 (C), active-MMP-9 (D), pro-MMP-2 (E), and active-MMP-2 (F) at both 2-week and 12-week time points. Labels a–g represent P < .05 compared with FA, JV, PPA, and DPA at 2 weeks (a); FA, JV, PPA, and DPA at 12 weeks (b); PA at 2 weeks (c); PA at 12 weeks (d); the neck at 2 weeks (e); the neck at 12 weeks (f); and the dome at 2 weeks (g).