MPO-IN-1 is a powerful and orally bioavailable indole-containing inhibitor that acts irrevocably on myeloperoxidase (MPO). With IC50 values of 2.6 μM and 5.3 μM for MPO and thyroid peroxidase (TPO), respectively, MPO-IN-1 effectively inhibits both enzymes. Furthermore, it exhibits remarkable MPO inhibitory activity in an acute inflammation mouse model.

MPO-IN-4 (compound 12) is a potent and selective myeloperoxidase (MPO) inhibitor with an IC 50 of 25 nM. MPO-IN-4 also demonstrates inhibition of thyroid peroxidase (TPO) with IC50 of 2.2 μM. MPO-IN-4 has no effect on methyl guanine methyl transferase (MGMT) [1].

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.

Olsalazine-13C6is intended for use as an internal standard for the quantification of olsalazine by GC- or LC-MS. Olsalazine is an orally bioavailable prodrug form of the anti-inflammatory agent 5-aminosalicylic acid that is cleaved by bacterial azo reductases in the gut to generate active 5-ASA.1In vitro, olsalazine increases ion transport in isolated rabbit distal ileum when applied to the luminal side (ED50= 0.3 mM) and stimulates fluid transport in rat jejunum when used at a concentration of 5 mM.2,3Olsalazine (150 mg/kg for 8 days) improves stool consistency and decreases occult and gross bleeding as well as myeloperoxidase (MPO) activity and leukotriene B4levels in colon tissue in a mouse model of acute colitis induced by dextran sulfate .4Olsalazine also inhibits bovine xanthine oxidasein vitro(IC50= 3.4 mg/L) and lowers serum uric acid levels in a mouse model of hyperuricemia induced by oxonic acid when administered at a dose of 20 mg/kg.5Formulations containing olsalazine have been used in the treatment of inflammatory bowel disease (IBD) and ulcerative colitis. 1.Nugent, S.G., Kumar, D., Rampton, D.S., et al.Intestinal luminal pH in inflammatory bowel disease: Possible determinants and implications for therapy with aminosalicylates and other drugsGut48(4)571-577(2001) 2.Pamukcu, R., Hanauer, S.B., and Chang, E.B.Effect of disodium azodisalicylate on electrolyte transport in rabbit ileum and colon in vitro. Comparison with sulfasalazine and 5-aminosalicylic acidGastroenterology95(4)975-981(1988) 3.Mohsen, A.Q.M., Mulvey, D., Priddle, J.D., et al.Effects of olsalazine in the jejunum of the ratGut28(3)346-352(1987) 4.Murthy, S., Murthy, N.S., Coppola, D., et al.The efficacy of BAY y 1015 in dextran sulfate model of mouse colitisInflamm. Res.46(6)224-233(1997) 5.Niu, Y., Li, H., Gao, L., et al.Old drug, new indication: Olsalazine sodium reduced serum uric acid levels in mice via inhibiting xanthine oxidoreductase activityJ. Pharmacol. Sci.135(3)114-120(2017)

Nexinhib20 is an inhibitor of the protein-protein interaction between the small GTPase Rab27a and its effector JFC1 (IC50 = 2.6 μM).[1] It inhibits myeloperoxidase (MPO) secretion induced by granulocyte macrophage colony-stimulating factor (GM-CSF) and fMLP in isolated human neutrophils (IC50 = 0.33 μM). Nexinhib20 (30 mg/kg) reduces LPS-induced increases in plasma MPO levels, as well as LPS-induced hepatic and renal neutrophil infiltration in a mouse model of endotoxin-induced systemic inflammation.

COX-2-IN-14 (compound 2a) is a highly potent and selective inhibitor of COX-2 (cyclooxygenase-2), with strong binding affinity at the active site of COX-2 co-crystal. Demonstrating remarkable in vivo anti-inflammatory activity, COX-2-IN-14 effectively reduces ear edema and myeloperoxidase (MPO) activity in mice [1].

MPO-IN-5 is a potent, irreversible inhibitor of MPO (myeloperoxidase). MPO-IN-5 inhibits MPO peroxidation (IC50: 0.22 μM) and hERG binding (IC50: 2.8 μM). 23000 M 1s 1.

2-chloro Palmitic acid is a monochlorinated form of palmitic acid . It is produced in a myeloperoxidase (MPO) and time-dependent manner in neutrophils stimulated by phorbol 12-myristate 13-acetate . 2-chloro Palmitic acid (10 μM) induces neutrophil extracellular trap (NET) formation (NETosis) in human neutrophils, increasing DNA release from neutrophils, colocalization of MPO with extracellular DNA (ecDNA), and trapping of E. coli. It increases COX-2 protein levels in human coronary artery endothelial cells (HCAECs) when used at a concentration of 50 μM and increases production of P-selectin, von Willebrand factor, and angiopoietin-2 in HCAECs, as well as neutrophil and platelet adherence, when used at a concentration of 10 μM. 2-chloro Palmitic acid (10-50 μM) also induces apoptosis in THP-1 cells and primary human monocytes and increases caspase-3 activity in THP-1 cells.