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RSS FeedsMarine Drugs, Vol. 18, Pages 111: The Marine-Derived Triterpenoid Frondoside A Inhibits Thrombus Formation (Marine Drugs)

 
 

14 february 2020 16:02:53

 
Marine Drugs, Vol. 18, Pages 111: The Marine-Derived Triterpenoid Frondoside A Inhibits Thrombus Formation (Marine Drugs)
 




Background: The marine-derived triterpenoid frondoside A inhibits the phosphatidylinositol-3-kinase (PI3K) pathway in cancer cells. Because this pathway is also crucially involved in platelet activation, we studied the effect of frondoside A on thrombus formation. Methods: Frondoside A effects on platelet viability, surface adhesion molecule expression, and intracellular signaling were analyzed by flow cytometry and Western blot. The effect of frondoside A was analyzed by photochemically induced thrombus formation in the mouse dorsal skinfold chamber model and by tail vein bleeding. Results: Concentrations of up to 15 µM frondoside A did not affect the viability of platelets, but reduced their surface expression of P-selectin (CD62P) and the activation of glycoprotein (GP)IIb/IIIa after agonist stimulation. Additional mechanistic analyses revealed that this was mediated by downregulation of PI3K-dependent Akt and extracellular-stimuli-responsive kinase (ERK) phosphorylation. Frondoside A significantly prolonged the complete vessel occlusion time in the mouse dorsal skinfold chamber model of photochemically induced thrombus formation and also the tail vein bleeding time when compared to vehicle-treated controls. Conclusion: Our findings demonstrated that frondoside A inhibits agonist-induced CD62P expression and activation of GPIIb/IIIa. Moreover, frondoside A suppresses thrombus formation. Therefore, this marine-derived triterpenoid may serve as a lead compound for the development of novel antithrombotic drugs.


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24 viewsCategory: Biochemistry, Molecular Biology, Pharmacology
 
Marine Drugs, Vol. 18, Pages 112: Investigating the Antiparasitic Potential of the Marine Sesquiterpene Avarone, Its Reduced form Avarol, and the Novel Semisynthetic Thiazinoquinone Analogue Thiazoavarone (Marine Drugs)
Marine Drugs, Vol. 18, Pages 114: The Biological and Chemical Diversity of Tetramic Acid Compounds from Marine-Derived Microorganisms (Marine Drugs)
 
 
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