thrombin inhibitor 5

Thrombin inhibitor 5 (compound 385) is a thrombin inhibitor with IC50 values ranging from 0.1 μM to 1 μM, suitable for venous thromboembolism research[1].

R 59-022 hydrochloride (DKGI-I hydrochloride) is a 5-HT Receptor antagonist that activates protein kinase C (PKC).R 59-022 hydrochloride is a DGK inhibitor (IC50:2.8 µM) that inhibits the phosphorylation of OAG to OAPA.R 59-022 enhances thrombin-induced triglyceride production in platelets and inhibits the production of phosphatidic acid in neutrophils. R 59-022 enhances thrombin-induced diglyceride production in platelets and inhibits phosphatidic acid production in neutrophils.

Thrombin receptor agonist peptide (TRAP-14) is a 14-amino acid peptide agonist of the α-thrombin receptor. It induces aggregation of washed platelets as well as platelets in citrated and hirudin plasma. TRAP-14 (100 μM) increases the cytosolic calcium concentration in isolated guinea pig pulmonary smooth muscle cells 5-fold over baseline. It increases pulmonary arterial pressure in isolated guinea pig lung when used at a concentration of 1 μM, which is comparable to the effect induced by 10 nM α-thrombin. TRAP-14 also induces contraction of isolated rat aortic rings and increases endothelin-1 (ET-1) levels in a dose-dependent manner, an effect that is reversed by the ETA antagonist BQ-123 and the nitric oxide synthase (NOS) inhibitor L-NNA .

Bivalirudin TFA, a synthetic 20-residue peptide, serves as a reversible inhibitor of thrombin. Its IC50 value highlights its target specificity in vitro, where, combined with Eptifibatide (8 mg mL) at a low concentration (70 ng mL), it significantly reduces platelet aggregation induced by thrombin (0.2 U mL) by approximately 90% [1]. The compound demonstrates no effect on thrombin generation assay (TGA) parameters up to 10 μmol L [2]. Additionally, it facilitates the binding of MPO to BAEC, leading to functional alterations such as increased NO consumption and enhanced MPO-mediated redox modifications [3]. In vivo studies reveal its efficacy in preventing the rise of antiheparin PF4 antibody IgG levels in rats, with significant findings from the toxicokinetic assessment signaling its safety profile at tested doses, although higher doses resulted in fatalities [4][5]. In clinical trials, its antithrombotic effects were explored, comparing it with alternatives like Ticagrelor and Clopidogrel in a Phase 4 study.