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Thrombin Inhibition: Preliminary Assessment of the Anticoagulant Potential of Turnera subulata (Passifloraceae)

2019; Mary Ann Liebert, Inc.; Volume: 22; Issue: 4 Linguagem: Inglês

10.1089/jmf.2018.0141

1557-7600

Jefferson Romáryo Duarte da Luz, Thayse Evellyn Silva do Nascimento, Leandro Vinícius Fernandes de Morais, Ana Katarina Menezes da Cruz, Adriana Augusto de Rezende, José Brandão Neto, Marcela Abbott Galvão Ururahy, André Ducati Luchessi, Jorge A. López, Hugo Alexandre Oliveira Rocha, Maria das Graças Almeida,

Blood Pressure and Hypertension Studies

Cardiovascular and thromboembolic disturbances are the main causes of disease-related deaths worldwide. Regardless of the etiological factors involved in thrombus formation, coagulation is mainly activated by thrombin, one of the most important blood clotting molecules. Thus, this study evaluated the Turnera subulata leaf crude extract, its ethyl acetate fraction effect on the coagulation cascade, and its possible side effects. Their phytocomposition indicated polyphenols, mainly flavonol-3-O-glycosylate and a flavone glycoside, without in vitro and in vivo toxicity. Regarding their potential anticoagulants, results displayed partial thromboplastin and prothrombin time activation, and Xa and IIa, and thrombin inhibition by heparin II cofactor, indicating significant anticoagulant activity, suggesting direct and indirect thrombin inhibition as the main mechanism of action. Therefore, T. subulata leaf active compounds exhibit therapeutic potential required to develop phytotherapeutic formulations to assist conventional anticoagulants in clinical treatments.