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Aβ<sub>1–40</sub>-Induced Platelet Adhesion Is Ameliorated by Rosmarinic Acid through Inhibition of NADPH Oxidase/PKC-δ/Integrin α<sub>IIb</sub>β<sub>3</sub> Signaling
oleh: Bo Kyung Lee, Hye Jin Jee, Yi-Sook Jung
Format: | Article |
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Diterbitkan: | MDPI AG 2021-10-01 |
Deskripsi
In platelets, oxidative stress reportedly increases platelet adhesion to vessels, thus promoting the vascular pathology of various neurodegenerative diseases, including Alzheimer’s disease (AD). Recently, it has been shown that β-amyloid (Aβ) can increase oxidative stress in platelets; however, the underlying mechanism remains elusive. In the present study, we aimed to elucidate the signaling pathway of platelet adhesion induced by Aβ<sub>1–40</sub>, the major form of circulating Aβ, through Western blotting, immunofluorescence confocal microscopy, and fluorescence-activated cell sorting analysis. Additionally, we examined whether rosmarinic acid (RA), a natural polyphenol antioxidant, can modulate these processes. Our results show that Aβ<sub>1–40</sub>-induced platelet adhesion is mediated through NADPH oxidase/ROS/PKC-δ/integrin α<sub>IIb</sub>β<sub>3</sub> signaling, and these signaling pathways are significantly inhibited by RA. Collectively, these results suggest that RA may have beneficial effects on platelet-associated vascular pathology in AD.