Vidofludimus (4SC-101, SC12267) is a novel small molecule inhibitor of dihydroorotate dehydrogenase (DHODH) with an IC50 value of 134nmol/L for human DHODH.Vidofludimus (4SC-101, SC12267) has been reported to dose-dependently inhibit DHODH in an in vitro enzyme assay with IC50 values of 0.134μmol/L, 1.29μmol/L, 10.6μmol/L and 12.9μmol/L in human DHODH, rat DHODH, mouse DHODH and human PBMC, respectively [1]. In addition, Vidofludimus has shown the inhibition of proliferation in phytohemagglutinin-induced lymphocytes with an IC50 value of ~13μmol/L. Moreover, Vidofludimus has been revealed to concentration-dependently inhibit phytohemagglutinin-stimulated interukin-17 secretion from human peripgeral blppd mononuclear cell lines (PBMCs) with an IC50 value of 6 μmol/L
