Reduction of Ischemia Reperfusion-Related Brain Hemorrhage by Stachybotrys Microspora Triprenyl Phenol-7 in Mice With Antioxidant Effects

Background: Stachybotrys microspora triprenyl phenol-7 (SMTP-7) has both thrombolytic and anti-inflammatory effects, but its neuroprotective effects on cerebral ischemia are still unclear. The present study assessed the antioxidative and neurovascular unit (NVU) protective effects of SMTP-7 using transient middle cerebral artery occlusion (tMCAO) mice. Methods: After 60 minutes tMCAO, 0.9% NaCl, tissue-type plasminogen activator (tPA), SMTP-7 or tPA + SMTP-7 was intravenously administrated through subclavian vein just before the reperfusion, and these mice were examined at 24 hours after reperfusion. We histologically assessed the hemorrhage and expressive changes of antioxidative markers in brains. Results: SMTP-7 treatment showed a similar antithrombotic effect to tPA, but significantly decreased the hemorrhage volumes and the number of 4-HNE, 3-NT and 8-OHdG positive cells, meanwhile, ameliorated the decrease of collagen IV in the ischemic brains. However, tPA + SMTP-7 treatment did not decrease hemorrhage volumes nor showed NVU protective effect. Conclusions: The present study suggested that SMTP-7 provided therapeutic benefits for ischemic stroke through antioxidative and NVU protective effects unlike tPA alone or tPA + SMTP-7.