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. 2021 Mar 30;2021:6655122. doi: 10.1155/2021/6655122

Figure 8.

Figure 8

Schematic model for MMP3 regulation of BBB permeability. MMP3 is produced by BMVECs in response to external factors and phosphorylates ERK, which subsequently disrupts tight junctions between adjacent ECs, thereby increasing BBB permeability. BBB integrity can be preserved via ERK inhibition or by blocking MMP3 activity with NNGH.