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Mitoquinone (MitoQ) Inhibits Platelet Activation Steps by Reducing ROS Levels

2020; Multidisciplinary Digital Publishing Institute; Volume: 21; Issue: 17 Linguagem: Inglês

10.3390/ijms21176192

1661-6596

Diego Méndez, Diego Arauna, Francisco Fuentes, Ramiro Araya‐Maturana, Iván Palomo, Marcelo Alarcón, David Sebastián, António Zorzano, Eduardo Fuentes,

Nitric Oxide and Endothelin Effects

Platelet activation plays a key role in cardiovascular diseases. The generation of mitochondrial reactive oxygen species (ROS) has been described as a critical step required for platelet activation. For this reason, it is necessary to find new molecules with antiplatelet activity and identify their mechanisms of action. Mitoquinone (MitoQ) is a mitochondria-targeted antioxidant that reduces mitochondrial overproduction of ROS. In this work, the antiplatelet effect of MitoQ through platelet adhesion and spreading, secretion, and aggregation was evaluated. Thus MitoQ, in a non-toxic effect, decreased platelet adhesion and spreading on collagen surface, and expression of P-selectin and CD63, and inhibited platelet aggregation induced by collagen, convulxin, thrombin receptor activator peptide-6 (TRAP-6), and phorbol 12-myristate 13-acetate (PMA). As an antiplatelet mechanism, we showed that MitoQ produced mitochondrial depolarization and decreased ATP secretion. Additionally, in platelets stimulated with antimycin A and collagen MitoQ significantly decreased ROS production. Our findings showed, for the first time, an antiplatelet effect of MitoQ that is probably associated with its mitochondrial antioxidant effect.