PECAM1 and hematoma: Interestingly, both TBA and AAV-BI30-MEC17 significantly reduced F-actin expression in CD31-positive ECs around the hematoma after ICH compared with the ICH group (Fig. 6c,d, P < 0.05 for ICH + TBA versus ICH, P < 0.01 for ICH + AAV-BI30-MEC17 versus ICH).