Assessment of effects of phenolic fractions from leaves and petals of dandelion in selected components of hemostasis.
Aerial parts and roots of Taraxacum officinale (dandelion) have been found to be rich sources of polyphenols, including cinnamic acid derivatives, flavonoids and triterpenoids, which exert different biological activities, such as anti-inflammatory, anticancer and antimicrobial. Additionally, the whole plant is recognized as safe and well tolerated by humans, with no reported adverse effects. Nowadays, dandelion is a commonly available dietary supplement and a component of pharmaceutical preparations used for the treatment of bladder, liver, and spleen. Nevertheless, the effect of dandelion on blood platelets and plasma - components of hemostasis involved in the functioning of a cardiovascular system and linked with various cardiovascular diseases, has not been studied yet. Thus, the main objective of our in vitro experiments was to examine the anti-platelet and antioxidant properties of four standardized dandelion phenolic fractions, i.e. leaves 50% and 85% methanol fractions, and petals 50% and 85% methanol fractions, in blood platelets. Additionally, aforementioned plant preparations were investigated for hemostatic activity in plasma, using three selected hemostatic parameters: the activated partial thromboplastin time (APTT), prothrombin time (PT) and thrombin time (TT). None of the studied dandelion fractions, caused the damage of human blood platelets, at the whole tested range. The inhibition of lipid peroxidation in platelets treated with H2O2/Fe (the donor of OH) was observed for two fractions: leaves and petals 50% fractions, both at the dose 50 μg/mL. Analysis of the effect on the coagulation activity of human plasma demonstrated that three fractions: petals 50% fraction, and leaves and petals 85% fractions, significantly prolonged the thrombin time, at the whole tested range. On the contrary, none of the fractions changed the APTT and the PT. The obtained results demonstrate that dandelion preparations, based on aerial parts, especially rich in hydroxycinnamic acid derivatives (leaves and petals 50% fractions) are promising plant materials exerting both antioxidant and anticoagulant activities of the hemostatic system that is beneficial in the prevention and treatment of cardiovascular diseases.
['Lis|Bernadetta|B|', 'Jędrejek|Dariusz|D|', 'Stochmal|Anna|A|', 'Olas|Beata|B|']
D000925:Anticoagulants D000975:Antioxidants D001777:Blood Coagulation D001780:Blood Coagulation Tests D001792:Blood Platelets D003373:Coumaric Acids D004305:Dose-Response Relationship, Drug D035264:Flowers D006801:Humans D015227:Lipid Peroxidation D010636:Phenols D010936:Plant Extracts D018515:Plant Leaves D010975:Platelet Aggregation Inhibitors D050050:Protein Carbonylation D031205:Taraxacum
Dandelion Thrombin time Coagulation Anti-platelet activity Oxidative stress