Review Article

Natural Products for Antithrombosis

Table 4

Impacting on the arachidonic acid system of natural products.

Natural productsExperimental modelsPossible mechanismsReference

Epigallocatechin-3-gallate of green tea leavesRat blood (in vitro);
agonist: collagen
Inhibiting the activation of COX-1 and TXAS, with a stronger selectivity in COX-1 inhibition than TXAS inhibition[133]

Jujuboside B of seeds of Zizyphus jujuba Rat blood (in vitro);
agonist: collagen
Inhibition of TXA2 production[134]

Alditol and monosaccharide of sorghum vinegar Human blood (in vitro);
agonist: AA, collagen, ADP, and THR
Inhibition of COX-1 and TXAS and attenuating TXA2 production[135]

Diacetylated obovatol of Magnolia obovata leavesRabbit blood (in vitro);
agonist: collagen and AA
Inhibition of COX-1 and LOX activities and decreasing in cytosolic Ca2+ mobilization and 5-HT secretion[136]

Ethanol extract, eupatilin, and jaceosidin of Artemisia princeps PampaniniHuman blood (in vitro);
agonist: AA
Inhibition the generation of 5-HT and TXA2[137]

Berberine of berberine sulfate injectionRabbit blood (ex vivo);
agonist: ADP, AA, and collagen
Suppressing of TXA2[138]

Hesperetin of grapefruits and orangesRabbit blood (in vitro);
agonist: AA and collagen
Inhibition of PLC-γ2 phosphorylation, COX-1 activity, and decreasing of Ca2+ as well as TXA2[139]

Green tea catechins of Camellia sinensis Rabbit blood (in vitro);
agonist: AA, collagen, and U-46619
Inhibition of AA liberation, TXA2 synthesis, PGD2, and ATP formation[140]

Hydroxychavicol of betel quidRat blood (in vitro);
agonist: AA, collagen, and THR
Inhibition of COX-1/COX-2 enzyme activity and decreasing TXA2 and ROS production as well as Ca2+ mobilization[141]

Tetrandrine and fangchinoline of Radix Stephaniae Tetrandrae Human blood (in vitro);
agonist: PAF, THR and AA
Suppression of TXA2 formation, but without inhibiting the binding of PAF to PAF-receptor[142]

Isorhynchophy lline of Uncaria sinensis (Oliv.) Havil.Rabbit blood (in vitro);
agonist: collagen
Inhibition of TXA2 formation[143]

Genistein Rabbit blood (in vitro);
agonist: PAF
Inhibition of TXA2 formation and increasing PGI2 generation[144]

Ethyl acetate extract of Caesalpinia sappan L.Rat blood (ex vivo);
agonist: ADP
Inhibition of TXA2 formation and increasing PGI2 generation[145]

Morroniside of Cornus officinalis Sieb.et ZuccRabbit blood (in vitro);
agonist: ADP
Inhibition of COX activation and decreasing TXB2 generation[146, 147]

Neolignans of three Lauraceae species (Pleurothyrium cinereum, Ocotea macrophylla, and Nectandra amazonum)Rabbit blood (in vitro)
agonist: PAF, ADP and AA
Inhibition of COX-2 by Benzofuran neolignans; inhibition of PAF-action, COX-1, 5-LOX by bicyclooctane; inhibition of COX-2, PAF-action by neolignan 9-nor-7,8-dehydro-isolicarin B and cinerin C; inhibition of 5-LOX/COX-2 by Nectamazin C [148]

Extracts of Myoga (Zingiber mioga Roscoe) Human blood (in vitro)
agonist: ADP and AA
Inhibition of 5-LOX by miogatrial, miogadial, sesquiterpene and polygodial [149]

Ginsenoside Rk1 of white ginsengRat blood (in vitro)
agonist: AA
Decreasing of 12-HETE, 12-LOX, and Ca2+ levels [150]

AA: arachidonic acid; ADP: adenosine diphosphate; THR: thrombin; PAF: platelet activating factor; COX-1: cyclooxygenase-1; COX-2: cyclooxygenase-2; TXAS: thromboxane synthase; LOX: lipoxygenase; TXA2: thromboxane A2; TXB2: thromboxane B2; 5-HT: 5-hydroxytryptamine; PLC-γ2: phospholipase C-γ2; PGD2: prostaglandin D2; ATP: adenosine triphosphate; ROS: reactive oxygen species; PGI2: prostacycline 2; 12-HETE: 12-hydroxy-5,8,10,14-eicosatetraenoic acid.