Abstract
Dipyridamole (DIP) is a well-known pharmaceutical drug used as a coronary vasodilator and anti-platelet agent in clinics for treating several cardiovascular diseases. Primarily, the therapeutic effects of the drug are attributed to its antioxidant potency. In this research, we aim to declare the unknown antioxidant mechanism of DIP as well as its potent chain-breaking antioxidant activity in polar aqueous medium inside the cells, using different experimental methods and theoretical quantum calculations. Data demonstrated the higher antioxidant capacity of DIP against ROS and free radicals in polar cell's interior. DIP is capable of generating long living and noninvasive DIP• radicals in oxidant condition that leads to an effective “chain-breaking antioxidant” activity. Quantum computational data indicated that DIP antioxidant has more favorable ionization potential than trolox which means DIP has higher antioxidant activity. Also, data showed that the direct hydrogen-transfer is not a favorable process to construct DIP• because of high barrier energy, though electron-transfer process can more easily to produce DIP•+ with the lowest barrier energy. Altogether, the electron donating potency of DIP to reduce ferric ion, having the low anodic oxidation peak potential, producing long lived stable DIP• radicals and protecting myoblast cells from oxidation, proposed the excellent “chain-breaking antioxidant” potency via electron-transfer mechanism of this vasodilator DIP drug in polar aqueous medium.
Highlights
Dipyridamole (DIP) [2,6-bis(diethanolamino)-4,8-di-piperidinopyrimido-(5,4-d)pyrimidine] is a dilatation agent of coronary artery used as a treatment for several cardiovascular diseases such as angina pectoris and myocardial infarction [1,2]
It appeared interesting to study the direct influence of DIP on reactive oxygen species (ROS) protection as to the activity is known to be dependent on membrane surroundings [14,15]. These findings obviously indicated that the strong antioxidant affectivity of DIP in protecting lipids from peroxidation is associated with the higher hydrophobicity of the compound [16]
Production of stable DIPN radical DIP molecules were reacted with cumene hydroperoxide (CHP)
Summary
Dipyridamole (DIP) [2,6-bis(diethanolamino)-4,8-di-piperidinopyrimido-(5,4-d)pyrimidine] is a dilatation agent of coronary artery used as a treatment for several cardiovascular diseases such as angina pectoris and myocardial infarction [1,2]. The drug can be adsorbed in the human body and entered into the blood. It prevents blood cells called platelets from clumping together inside the blood vessels and reversibly, inhibits platelet aggregation and platelet-mediated thrombotic disease [3]. It has been hypothesized that the therapeutic effects of DIP are attributed to its antioxidant potency because of having special chemical structure [3].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
