Abbas Khosravi - Blood Transfusion Research center, High Institute for Research and Education in Transfusion Medicine, Tehran, Iran.
Mohammad Reza Deyhim - Blood Transfusion Research center, High Institute for Research and Education in Transfusion Medicine, Tehran, Iran.
Fatemeh Yari - Blood Transfusion Research center, High Institute for Research and Education in Transfusion Medicine, Tehran, Iran.
Mahin Nikougoftar Zarif - Blood Transfusion Research center, High Institute for Research and Education in Transfusion Medicine, Tehran, Iran.

Background: In the current study we have aimed to find the effects of Resveratrol treatment on platelet concentrates (PCs) at the dose dependent manner. We have also attempted to find the molecular mechanism of the effects. Methods: The PCs, have received from Iranian blood transfusion organization (IBTO). Totally ۱۰ PCs were studied. The PCs divided into ۴ groups including untreated (control) and treated by different dose of Resveratrol; ۱۰, ۳۰ and ۵۰ µM. Platelet aggregation and total reactive oxygen species (ROS) levels were evaluated at day ۳ of PCs storage. In silico analysis was carried out to find out the potential involved mechanisms. Results: The aggregation against collagen has fallen dramatically in all studied groups but at the same time, aggregation was significantly higher in the control versus treated groups (p<۰.۰۵). The inhibitory effect was dose dependent. The aggregation against Ristocetin did not significantly affect by Resveratrol treatment. The mean of total ROS significantly increased in all studied groups except those PCs treated with ۱۰ µM of Resveratrol (P=۰.۹). The ROS level significantly increased with increasing Resveratrol concentration even more than control group (slope=۱۱.۶, P=۰.۰۰۳۴). Resveratrol could potently interact with more than ۱۵ different genes which, ۱۰ of them enrolled in cellular regulation of the oxidative stress. Conclusions: Our findings indicated that the Resveratrol affect the platelet aggregation at the dose dependent manner. Moreover, we have also found that the Resveratrol play as double-edged sword in the controlling oxidative state of the cells. Therefore, Using the optimal dose of Resveratrol is the great of importance.

Aggregation, Oxidative stress, Platelet storage lesion, Resveratrol.