Portal de Periódicos da CAPES

Synthetic analogues of flavonoids with improved activity against platelet activation and aggregation as novel prototypes of food supplements

2014; Elsevier BV; Volume: 175; Linguagem: Inglês

10.1016/j.foodchem.2014.12.005

1873-7072

Serena Del Turco, Stefania Sartini, Giulia Cigni, Cassandra Sentieri, Silverio Sbrana, Debora Battaglia, Angela Papa, Federico Da Settimo, Concettina La Motta, Giuseppina Basta,

Ginseng Biological Effects and Applications

We investigated the ability of quercetin and apigenin to modulate platelet activation and aggregation, and compared the observed efficacy with that displayed by their synthetic analogues 2-phenyl-4H-pyrido[1,2-a]pyrimidin-4-ones, 1–4, and 2,3-diphenyl-4H-pyrido[1,2-a]pyrimidin-4-ones, 5–7. Platelet aggregation was explored through a spectrophotometric assay on platelet-rich plasma (PRP) treated with the thromboxane A2 mimetic U46619, collagen and thrombin in presence/absence of various bioisosteres of flavonoids (12.5–25–50–100 μM). The platelet density, (mean platelet component, MPC), was measured by the Advia 120 Hematology System as a marker surrogate of platelet activation. The induced P-selectin expression, which reflects platelet degranulation/activation, was quantified by flow cytometry on PRP. Our synthetic compounds modulated significantly both platelet activation and aggregation, thus turning out to be more effective than the analogues quercetin and apigenin when tested at a concentration fully consistent with their use in vivo. Accordingly, they might be used as food supplements to increase the efficacy of natural flavonoids.