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Effect of early exercise on the activity of MMP-9 protein following focal cerebral ischemia. (A) Representative bands of MMP-9 activity in the ipsilateral cortex following MCAO detected by gelatin zymography; (B) Quantification of the optical density for the MMP-9 band, normalized to MMP-9 standard. MMP-9 activity was significantly inhibited in the EE group. ** p < 0.01, compared with the NE group; ## p < 0.01, compared with the sham group. n = 6.
