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Expression of metallopeptidase-9 (MMP-9) in aorta in different experimental groups. a Photomicrographs showing MMP-9 in the Con group, the Lig group, the Lig-N group and the Lig-SRP group. ×100, scale bars 100 μm. ×200, scale bars 100 μm. ×400, scale bars 50 μm. Arrowheads immuno-reactive cells. b Graph showing the MMP-9 positive cell counts by fold in each group. *p < 0.05. c Relative gene expression levels of MMP-9 in aorta. *p < 0.05
