Key result
Xueshuantong capsule inhibited ADP-induced platelet activation and suppressed platelet/leukocyte adhesion to injured endothelial cells in a concentration- and shear stress-dependent manner.
Why the study?
Xueshuantong capsule is used for thrombosis prevention and treatment, but its anti-thrombosis molecular mechanism involving cross-talk among platelets/leukocytes, endothelial cells, and flow shear stress required investigation.
Does Xueshuantong capsule reduce platelet activation and leukocyte adhesion to endothelial cells under different shear stress conditions?
Does Xueshuantong capsule reduce platelet activation and leukocyte adhesion to endothelial cells under different shear stress conditions?
Answers are grounded in this paper and cite their sources.
Xueshuantong capsule inhibits platelet activation and leukocyte adhesion to injured endothelial cells in a dose- and shear stress-dependent manner, providing a biomechanopharmacological mechanism for its anti-thrombotic effects.
Xueshuantong capsule (XST) is a patented traditional Chinese medicine used for the prevention and treatment of thrombosis. The molecular mechanism of XST anti-thrombosis effect through the cross-talk among the platelets/leukocytes, endothelial cells and flow shear stress was investigated. The Bioflux1000 system was used to generate two levels of shear stress: 0.1 and 0.9 Pa. Bioflux Metamorph microscopic imaging system was used to analyze the adhesion cell numbers. Protein expressions were detected by western blot assay and flow cytometry method. The flow-cytometry results showed that, under 0.1 Pa flow, XST decreased ADP induced platelets CD62p surface expression in a dose-dependent manner. Under 0.9 Pa flow, XST at the concentrations of 0.15 g·L-1 reduced the platelets activation by 29.5%; and ASA did not exhibit the inhibitory effect. XST showed similar efficiency on monocytes adhesion both under 0.1 and 0.9 Pa flow conditions, and the inhibition rate was 30.2% and 28.3% respectively. Under 0.9 Pa flow, the anti-adhesion effect of XST might be associated with the suppression of VE-cadherin and Cx43. Under 0.1 Pa, the inhibition on platelets and THP-1 adhesion by XST may be through decreasing VCAM-1 expression. Blood flow performs not only as drug transporter but also exerts its effects to influence pharmacodynamics of XST. Effects of XST inhibiting platelets activation and suppressing platelets/leukocytes adhesion to injured endothelial cells are not only dose-dependent, but also shear stress-dependent. The mechanic forces combined with traditional Chinese medicine may be used as the precision treatment for cardiovascular disease.
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Han et al. (2019) studied Thrombosis. Xueshuantong capsule (XST) vs. Vehicle control and Aspirin was evaluated on Platelet activation (CD62p expression) and cell adhesion under different shear stress conditions (p=<0.001). Xueshuantong capsule inhibited ADP-induced platelet activation and suppressed platelet/leukocyte adhesion to injured endothelial cells in a concentration- and shear stress-dependent manner.
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