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Publication Abstract from PubMed

Antifibrinolytic drugs provide important pharmacological interventions to reduce morbidity and mortality from excessive bleeding during surgery and after trauma. Current drugs used for inhibiting the dissolution of fibrin, the main structural component of blood clots, are associated with adverse events due to lack of potency, high doses, and nonselective inhibition mechanisms. These drawbacks warrant the development of a new generation of highly potent and selective fibrinolysis inhibitors. Here, we use the 14-amino acid backbone-cyclic sunflower trypsin inhibitor-1 scaffold to design a highly potent ( Ki = 0.05 nM) inhibitor of the primary serine protease in fibrinolysis, plasmin. This compound displays a million-fold selectivity over other serine proteases in blood, inhibits fibrinolysis in plasma more effectively than the gold-standard therapeutic inhibitor aprotinin, and is a promising candidate for development of highly specific fibrinolysis inhibitors with reduced side effects.

Highly Potent and Selective Plasmin Inhibitors Based on the Sunflower Trypsin Inhibitor-1 Scaffold Attenuate Fibrinolysis in Plasma.,Swedberg JE, Wu G, Mahatmanto T, Durek T, Caradoc-Davies TT, Whisstock JC, Law RHP, Craik DJ J Med Chem. 2019 Jan 24;62(2):552-560. doi: 10.1021/acs.jmedchem.8b01139. Epub, 2018 Dec 26. PMID:30520638^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.