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Updated: Dec 27, 2025

Author Spotlight: Developing Parmodulins to Target Protease-Activated Receptors for Inflammation Control
Published on: May 24, 2024
Design and synthesis of potent PAR-1 antagonists based on vorapaxar
Mengna Fan1, Min Han2, Yan Xia2
1Hebei University of Technology, Tianjin 300100, China; Tianjin Tasly Academy, Tasly Holding Group Co., Ltd., Tianjin 300410, China; State Key Laboratory of Core Technology in Innovative Chinese Medicine, Tasly Holding Group Co., Ltd., Tianjin 300410, China.
Abstract:
A series of novel vorapaxar analogues with different amino substitutes at the C-7, C-9a and aromatic substitutes at the C-4 position were designed, synthesized, and evaluated for their inhibitory activity to PAR-1. Several compounds showed good potency in antagonist activity based on the intracellular calcium mobilization assay and excellent pharmacokinetics profile in rats. Among these analogues, 3d exhibited excellent PAR-1 inhibitory activity (IC50 = 0.18 μM) and the lower ability to cross the blood-brain barrier compared with vorapaxar (IC50 = 0.25 μM). Compound 3d has the potential to be developed as a new generation of PAR-1 antagonists with a better therapeutic window.
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